springJDBC01은 springJDBC를 사용하여 데이터베이스를 작동합니다.-java지도 시간-php.cn

1 springJDBC란 무엇인가

　 Spring은 JDBC 액세스를 추상화하고 일관된 API를 제공하여 JDBC 프로그래밍 작업 부하를 단순화합니다 . 우리는 SQL을 선언하고 적절한 SpringJDBC 프레임워크 API를 호출하고 결과 집합을 처리 만 하면 됩니다. 트랜잭션은 Spring에 의해 관리되며 JDBC 확인 예외를 Spring과 일치하는 확인되지 않은 예외로 변환하여 개발을 단순화합니다. 　기존 jdbc를 사용하여 데이터베이스를 작동하는 단계: 연결 가져오기 → 문 만들기 → 데이터 작업 수행 → 결과 가져오기 → 문 닫기 → 결과 집합 닫기 → 연결 닫기; Spring JDBC는 템플릿 클래스 org.springframework.jdbc에 의해 캡슐화됩니다. core.JdbcTemplate 상용구 코드 없이 사용자는 템플릿 클래스를 통해 대부분의 데이터 액세스 작업을 쉽게 완료할 수 있습니다.

2 준비

　2.1병 패키지

　　　spring-jdbc: springjdbc 패키지

　　mysql: MySQL 드라이버 패키지

　　dbcp: 데이터베이스 연결 풀
　　spring-webmvc: springmvc 프레임워크 패키지
　　annotation: @resource는 패키지를 사용해야 하며, 패키지는 웹인 경우 Tomcat에서 사용할 수 있습니다. 프로젝트와 실행 환경은 Tomcat이므로 이 패키지를 가져올 필요가 없습니다
　Junit: 단위 테스트 패키지

　2.2 데이터베이스 (mysql 데이터베이스 5.4 사용)

으아악

　3.1 maven을 사용하여 관련 jar 패키지 가져오기

으아악

pom.xml

　3.2 데이터베이스 관련 정보를 저장하기 위한 속성 파일 생성

으아악

mysql.properties

　3.3 스프링 구성 파일 생성

　3.3.1 속성 파일에서 빈 구성

　　3.3.2 데이터베이스 연결 풀 구성

　3.3.3 jdbcTemplate 구성

　3.3.4 구성 요소 검색 구성

으아악

spring_mysql.xml

　　注意：我们不用配置spirng的主控制器，因为我们只是操作持久层；虽然我们用到了spring容器，但是我们可以通过编写代码来启动容器

　　3.4 项目结构图

4 代码实现数据库操作

　　4.1 编写实体类

<span style="color: #008080"> 1</span> <span style="color: #0000ff">package</span><span style="color: #000000"> com.baobaotao.entity;
</span><span style="color: #008080"> 2</span> 
<span style="color: #008080"> 3</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.io.Serializable;
</span><span style="color: #008080"> 4</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.util.Date;
</span><span style="color: #008080"> 5</span> 
<span style="color: #008080"> 6</span> <span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span> User <span style="color: #0000ff">implements</span><span style="color: #000000"> Serializable {
</span><span style="color: #008080"> 7</span> 
<span style="color: #008080"> 8</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> <span style="color: #0000ff">final</span> <span style="color: #0000ff">long</span> serialVersionUID = -3573627859368072117L<span style="color: #000000">;
</span><span style="color: #008080"> 9</span>     
<span style="color: #008080">10</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> Integer userId;
</span><span style="color: #008080">11</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> String userName;
</span><span style="color: #008080">12</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> Integer credits;
</span><span style="color: #008080">13</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> String password;
</span><span style="color: #008080">14</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> Date lastVisit;
</span><span style="color: #008080">15</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> String lastIp;
</span><span style="color: #008080">16</span>     
<span style="color: #008080">17</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> User() {
</span><span style="color: #008080">18</span>         <span style="color: #0000ff">super</span><span style="color: #000000">();
</span><span style="color: #008080">19</span>         <span style="color: #008000">//</span><span style="color: #008000"> TODO Auto-generated constructor stub</span>
<span style="color: #008080">20</span> <span style="color: #000000">    }
</span><span style="color: #008080">21</span>     
<span style="color: #008080">22</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> User(Integer userId, String userName, Integer credits, String password, Date lastVisit, String lastIp) {
</span><span style="color: #008080">23</span>         <span style="color: #0000ff">super</span><span style="color: #000000">();
</span><span style="color: #008080">24</span>         <span style="color: #0000ff">this</span>.userId =<span style="color: #000000"> userId;
</span><span style="color: #008080">25</span>         <span style="color: #0000ff">this</span>.userName =<span style="color: #000000"> userName;
</span><span style="color: #008080">26</span>         <span style="color: #0000ff">this</span>.credits =<span style="color: #000000"> credits;
</span><span style="color: #008080">27</span>         <span style="color: #0000ff">this</span>.password =<span style="color: #000000"> password;
</span><span style="color: #008080">28</span>         <span style="color: #0000ff">this</span>.lastVisit =<span style="color: #000000"> lastVisit;
</span><span style="color: #008080">29</span>         <span style="color: #0000ff">this</span>.lastIp =<span style="color: #000000"> lastIp;
</span><span style="color: #008080">30</span> <span style="color: #000000">    }
</span><span style="color: #008080">31</span> 
<span style="color: #008080">32</span> <span style="color: #000000">    @Override
</span><span style="color: #008080">33</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">int</span><span style="color: #000000"> hashCode() {
</span><span style="color: #008080">34</span>         <span style="color: #0000ff">final</span> <span style="color: #0000ff">int</span> prime = 31<span style="color: #000000">;
</span><span style="color: #008080">35</span>         <span style="color: #0000ff">int</span> result = 1<span style="color: #000000">;
</span><span style="color: #008080">36</span>         result = prime * result + ((lastIp == <span style="color: #0000ff">null</span>) ? 0<span style="color: #000000"> : lastIp.hashCode());
</span><span style="color: #008080">37</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> result;
</span><span style="color: #008080">38</span> <span style="color: #000000">    }
</span><span style="color: #008080">39</span> <span style="color: #000000">    @Override
</span><span style="color: #008080">40</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">boolean</span><span style="color: #000000"> equals(Object obj) {
</span><span style="color: #008080">41</span>         <span style="color: #0000ff">if</span> (<span style="color: #0000ff">this</span> ==<span style="color: #000000"> obj)
</span><span style="color: #008080">42</span>             <span style="color: #0000ff">return</span> <span style="color: #0000ff">true</span><span style="color: #000000">;
</span><span style="color: #008080">43</span>         <span style="color: #0000ff">if</span> (obj == <span style="color: #0000ff">null</span><span style="color: #000000">)
</span><span style="color: #008080">44</span>             <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">45</span>         <span style="color: #0000ff">if</span> (getClass() !=<span style="color: #000000"> obj.getClass())
</span><span style="color: #008080">46</span>             <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">47</span>         User other =<span style="color: #000000"> (User) obj;
</span><span style="color: #008080">48</span>         <span style="color: #0000ff">if</span> (lastIp == <span style="color: #0000ff">null</span><span style="color: #000000">) {
</span><span style="color: #008080">49</span>             <span style="color: #0000ff">if</span> (other.lastIp != <span style="color: #0000ff">null</span><span style="color: #000000">)
</span><span style="color: #008080">50</span>                 <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">51</span>         } <span style="color: #0000ff">else</span> <span style="color: #0000ff">if</span> (!<span style="color: #000000">lastIp.equals(other.lastIp))
</span><span style="color: #008080">52</span>             <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">53</span>         <span style="color: #0000ff">return</span> <span style="color: #0000ff">true</span><span style="color: #000000">;
</span><span style="color: #008080">54</span> <span style="color: #000000">    }
</span><span style="color: #008080">55</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> Integer getUserId() {
</span><span style="color: #008080">56</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> userId;
</span><span style="color: #008080">57</span> <span style="color: #000000">    }
</span><span style="color: #008080">58</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setUserId(Integer userId) {
</span><span style="color: #008080">59</span>         <span style="color: #0000ff">this</span>.userId =<span style="color: #000000"> userId;
</span><span style="color: #008080">60</span> <span style="color: #000000">    }
</span><span style="color: #008080">61</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> String getUserName() {
</span><span style="color: #008080">62</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> userName;
</span><span style="color: #008080">63</span> <span style="color: #000000">    }
</span><span style="color: #008080">64</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setUserName(String userName) {
</span><span style="color: #008080">65</span>         <span style="color: #0000ff">this</span>.userName =<span style="color: #000000"> userName;
</span><span style="color: #008080">66</span> <span style="color: #000000">    }
</span><span style="color: #008080">67</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> Integer getCredits() {
</span><span style="color: #008080">68</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> credits;
</span><span style="color: #008080">69</span> <span style="color: #000000">    }
</span><span style="color: #008080">70</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setCredits(Integer credits) {
</span><span style="color: #008080">71</span>         <span style="color: #0000ff">this</span>.credits =<span style="color: #000000"> credits;
</span><span style="color: #008080">72</span> <span style="color: #000000">    }
</span><span style="color: #008080">73</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> String getPassword() {
</span><span style="color: #008080">74</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> password;
</span><span style="color: #008080">75</span> <span style="color: #000000">    }
</span><span style="color: #008080">76</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setPassword(String password) {
</span><span style="color: #008080">77</span>         <span style="color: #0000ff">this</span>.password =<span style="color: #000000"> password;
</span><span style="color: #008080">78</span> <span style="color: #000000">    }
</span><span style="color: #008080">79</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> Date getLastVisit() {
</span><span style="color: #008080">80</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> lastVisit;
</span><span style="color: #008080">81</span> <span style="color: #000000">    }
</span><span style="color: #008080">82</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setLastVisit(Date lastVisit) {
</span><span style="color: #008080">83</span>         <span style="color: #0000ff">this</span>.lastVisit =<span style="color: #000000"> lastVisit;
</span><span style="color: #008080">84</span> <span style="color: #000000">    }
</span><span style="color: #008080">85</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> String getLastIp() {
</span><span style="color: #008080">86</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> lastIp;
</span><span style="color: #008080">87</span> <span style="color: #000000">    }
</span><span style="color: #008080">88</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setLastIp(String lastIp) {
</span><span style="color: #008080">89</span>         <span style="color: #0000ff">this</span>.lastIp =<span style="color: #000000"> lastIp;
</span><span style="color: #008080">90</span> <span style="color: #000000">    }
</span><span style="color: #008080">91</span> 
<span style="color: #008080">92</span> <span style="color: #000000">    @Override
</span><span style="color: #008080">93</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> String toString() {
</span><span style="color: #008080">94</span>         <span style="color: #0000ff">return</span> "User [userId=" + userId + ", userName=" + userName + ", credits=" + credits + ", password=" +<span style="color: #000000"> password
</span><span style="color: #008080">95</span>                 + ", lastVisit=" + lastVisit + ", lastIp=" + lastIp + "]"<span style="color: #000000">;
</span><span style="color: #008080">96</span> <span style="color: #000000">    }
</span><span style="color: #008080">97</span> 
<span style="color: #008080">98</span> }

로그인 후 복사

User.java

<span style="color: #008080"> 1</span> <span style="color: #0000ff">package</span><span style="color: #000000"> com.baobaotao.entity;
</span><span style="color: #008080"> 2</span> 
<span style="color: #008080"> 3</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.io.Serializable;
</span><span style="color: #008080"> 4</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.util.Date;
</span><span style="color: #008080"> 5</span> 
<span style="color: #008080"> 6</span> <span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span> LoginLog <span style="color: #0000ff">implements</span><span style="color: #000000"> Serializable {
</span><span style="color: #008080"> 7</span> 
<span style="color: #008080"> 8</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> <span style="color: #0000ff">final</span> <span style="color: #0000ff">long</span> serialVersionUID = 5176708814959439551L<span style="color: #000000">;
</span><span style="color: #008080"> 9</span>     
<span style="color: #008080">10</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> Integer loginLogId;
</span><span style="color: #008080">11</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> String userId;
</span><span style="color: #008080">12</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> String ip;
</span><span style="color: #008080">13</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> Date loginDatetime;
</span><span style="color: #008080">14</span> <span style="color: #000000">    @Override
</span><span style="color: #008080">15</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">int</span><span style="color: #000000"> hashCode() {
</span><span style="color: #008080">16</span>         <span style="color: #0000ff">final</span> <span style="color: #0000ff">int</span> prime = 31<span style="color: #000000">;
</span><span style="color: #008080">17</span>         <span style="color: #0000ff">int</span> result = 1<span style="color: #000000">;
</span><span style="color: #008080">18</span>         result = prime * result + ((ip == <span style="color: #0000ff">null</span>) ? 0<span style="color: #000000"> : ip.hashCode());
</span><span style="color: #008080">19</span>         result = prime * result + ((loginDatetime == <span style="color: #0000ff">null</span>) ? 0<span style="color: #000000"> : loginDatetime.hashCode());
</span><span style="color: #008080">20</span>         result = prime * result + ((loginLogId == <span style="color: #0000ff">null</span>) ? 0<span style="color: #000000"> : loginLogId.hashCode());
</span><span style="color: #008080">21</span>         result = prime * result + ((userId == <span style="color: #0000ff">null</span>) ? 0<span style="color: #000000"> : userId.hashCode());
</span><span style="color: #008080">22</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> result;
</span><span style="color: #008080">23</span> <span style="color: #000000">    }
</span><span style="color: #008080">24</span> <span style="color: #000000">    @Override
</span><span style="color: #008080">25</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">boolean</span><span style="color: #000000"> equals(Object obj) {
</span><span style="color: #008080">26</span>         <span style="color: #0000ff">if</span> (<span style="color: #0000ff">this</span> ==<span style="color: #000000"> obj)
</span><span style="color: #008080">27</span>             <span style="color: #0000ff">return</span> <span style="color: #0000ff">true</span><span style="color: #000000">;
</span><span style="color: #008080">28</span>         <span style="color: #0000ff">if</span> (obj == <span style="color: #0000ff">null</span><span style="color: #000000">)
</span><span style="color: #008080">29</span>             <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">30</span>         <span style="color: #0000ff">if</span> (getClass() !=<span style="color: #000000"> obj.getClass())
</span><span style="color: #008080">31</span>             <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">32</span>         LoginLog other =<span style="color: #000000"> (LoginLog) obj;
</span><span style="color: #008080">33</span>         <span style="color: #0000ff">if</span> (ip == <span style="color: #0000ff">null</span><span style="color: #000000">) {
</span><span style="color: #008080">34</span>             <span style="color: #0000ff">if</span> (other.ip != <span style="color: #0000ff">null</span><span style="color: #000000">)
</span><span style="color: #008080">35</span>                 <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">36</span>         } <span style="color: #0000ff">else</span> <span style="color: #0000ff">if</span> (!<span style="color: #000000">ip.equals(other.ip))
</span><span style="color: #008080">37</span>             <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">38</span>         <span style="color: #0000ff">if</span> (loginDatetime == <span style="color: #0000ff">null</span><span style="color: #000000">) {
</span><span style="color: #008080">39</span>             <span style="color: #0000ff">if</span> (other.loginDatetime != <span style="color: #0000ff">null</span><span style="color: #000000">)
</span><span style="color: #008080">40</span>                 <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">41</span>         } <span style="color: #0000ff">else</span> <span style="color: #0000ff">if</span> (!<span style="color: #000000">loginDatetime.equals(other.loginDatetime))
</span><span style="color: #008080">42</span>             <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">43</span>         <span style="color: #0000ff">if</span> (loginLogId == <span style="color: #0000ff">null</span><span style="color: #000000">) {
</span><span style="color: #008080">44</span>             <span style="color: #0000ff">if</span> (other.loginLogId != <span style="color: #0000ff">null</span><span style="color: #000000">)
</span><span style="color: #008080">45</span>                 <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">46</span>         } <span style="color: #0000ff">else</span> <span style="color: #0000ff">if</span> (!<span style="color: #000000">loginLogId.equals(other.loginLogId))
</span><span style="color: #008080">47</span>             <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">48</span>         <span style="color: #0000ff">if</span> (userId == <span style="color: #0000ff">null</span><span style="color: #000000">) {
</span><span style="color: #008080">49</span>             <span style="color: #0000ff">if</span> (other.userId != <span style="color: #0000ff">null</span><span style="color: #000000">)
</span><span style="color: #008080">50</span>                 <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">51</span>         } <span style="color: #0000ff">else</span> <span style="color: #0000ff">if</span> (!<span style="color: #000000">userId.equals(other.userId))
</span><span style="color: #008080">52</span>             <span style="color: #0000ff">return</span> <span style="color: #0000ff">false</span><span style="color: #000000">;
</span><span style="color: #008080">53</span>         <span style="color: #0000ff">return</span> <span style="color: #0000ff">true</span><span style="color: #000000">;
</span><span style="color: #008080">54</span> <span style="color: #000000">    }
</span><span style="color: #008080">55</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> Integer getLoginLogId() {
</span><span style="color: #008080">56</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> loginLogId;
</span><span style="color: #008080">57</span> <span style="color: #000000">    }
</span><span style="color: #008080">58</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setLoginLogId(Integer loginLogId) {
</span><span style="color: #008080">59</span>         <span style="color: #0000ff">this</span>.loginLogId =<span style="color: #000000"> loginLogId;
</span><span style="color: #008080">60</span> <span style="color: #000000">    }
</span><span style="color: #008080">61</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> String getUserId() {
</span><span style="color: #008080">62</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> userId;
</span><span style="color: #008080">63</span> <span style="color: #000000">    }
</span><span style="color: #008080">64</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setUserId(String userId) {
</span><span style="color: #008080">65</span>         <span style="color: #0000ff">this</span>.userId =<span style="color: #000000"> userId;
</span><span style="color: #008080">66</span> <span style="color: #000000">    }
</span><span style="color: #008080">67</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> String getIp() {
</span><span style="color: #008080">68</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> ip;
</span><span style="color: #008080">69</span> <span style="color: #000000">    }
</span><span style="color: #008080">70</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setIp(String ip) {
</span><span style="color: #008080">71</span>         <span style="color: #0000ff">this</span>.ip =<span style="color: #000000"> ip;
</span><span style="color: #008080">72</span> <span style="color: #000000">    }
</span><span style="color: #008080">73</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> Date getLoginDatetime() {
</span><span style="color: #008080">74</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> loginDatetime;
</span><span style="color: #008080">75</span> <span style="color: #000000">    }
</span><span style="color: #008080">76</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setLoginDatetime(Date loginDatetime) {
</span><span style="color: #008080">77</span>         <span style="color: #0000ff">this</span>.loginDatetime =<span style="color: #000000"> loginDatetime;
</span><span style="color: #008080">78</span> <span style="color: #000000">    }
</span><span style="color: #008080">79</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> LoginLog() {
</span><span style="color: #008080">80</span>         <span style="color: #0000ff">super</span><span style="color: #000000">();
</span><span style="color: #008080">81</span>         <span style="color: #008000">//</span><span style="color: #008000"> TODO Auto-generated constructor stub</span>
<span style="color: #008080">82</span> <span style="color: #000000">    }
</span><span style="color: #008080">83</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> LoginLog(Integer loginLogId, String userId, String ip, Date loginDatetime) {
</span><span style="color: #008080">84</span>         <span style="color: #0000ff">super</span><span style="color: #000000">();
</span><span style="color: #008080">85</span>         <span style="color: #0000ff">this</span>.loginLogId =<span style="color: #000000"> loginLogId;
</span><span style="color: #008080">86</span>         <span style="color: #0000ff">this</span>.userId =<span style="color: #000000"> userId;
</span><span style="color: #008080">87</span>         <span style="color: #0000ff">this</span>.ip =<span style="color: #000000"> ip;
</span><span style="color: #008080">88</span>         <span style="color: #0000ff">this</span>.loginDatetime =<span style="color: #000000"> loginDatetime;
</span><span style="color: #008080">89</span> <span style="color: #000000">    }
</span><span style="color: #008080">90</span> <span style="color: #000000">    @Override
</span><span style="color: #008080">91</span>     <span style="color: #0000ff">public</span><span style="color: #000000"> String toString() {
</span><span style="color: #008080">92</span>         <span style="color: #0000ff">return</span> "LoginLog [loginLogId=" + loginLogId + ", userId=" + userId + ", ip=" + ip + ", loginDatetime="
<span style="color: #008080">93</span>                 + loginDatetime + "]"<span style="color: #000000">;
</span><span style="color: #008080">94</span> <span style="color: #000000">    }    
</span><span style="color: #008080">95</span>     
<span style="color: #008080">96</span> }

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LoginLog.java

　　4.2 编写UserDao接口

<span style="color: #008080"> 1</span> <span style="color: #0000ff">package</span><span style="color: #000000"> com.baobaotao.dao;
</span><span style="color: #008080"> 2</span> 
<span style="color: #008080"> 3</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.util.List;
</span><span style="color: #008080"> 4</span> 
<span style="color: #008080"> 5</span> <span style="color: #0000ff">import</span><span style="color: #000000"> com.baobaotao.entity.User;
</span><span style="color: #008080"> 6</span> 
<span style="color: #008080"> 7</span> <span style="color: #0000ff">public</span> <span style="color: #0000ff">interface</span><span style="color: #000000"> UserDao {
</span><span style="color: #008080"> 8</span>     <span style="color: #008000">/**</span>
<span style="color: #008080"> 9</span> <span style="color: #008000">     * 向用户表中添加记录
</span><span style="color: #008080">10</span> <span style="color: #008000">     * </span><span style="color: #808080">@param</span><span style="color: #008000"> user 用户表实体对象
</span><span style="color: #008080">11</span>      <span style="color: #008000">*/</span>
<span style="color: #008080">12</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> insert(User user);
</span><span style="color: #008080">13</span>     
<span style="color: #008080">14</span>     <span style="color: #008000">/**</span>
<span style="color: #008080">15</span> <span style="color: #008000">     * 查询所有用户数据
</span><span style="color: #008080">16</span> <span style="color: #008000">     * </span><span style="color: #808080">@return</span><span style="color: #008000"> 由查询到记录组成的集合
</span><span style="color: #008080">17</span>      <span style="color: #008000">*/</span>
<span style="color: #008080">18</span>     <span style="color: #0000ff">public</span> List<User><span style="color: #000000"> findAll();
</span><span style="color: #008080">19</span> 
<span style="color: #008080">20</span> }

로그인 후 복사

UserDao.java

　　4.3 编写UserDao接口的实现类UserDaoImpl　　

<span style="color: #008080"> 1</span> <span style="color: #0000ff">package</span><span style="color: #000000"> com.baobaotao.dao;
</span><span style="color: #008080"> 2</span> 
<span style="color: #008080"> 3</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.sql.ResultSet;
</span><span style="color: #008080"> 4</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.sql.SQLException;
</span><span style="color: #008080"> 5</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.util.List;
</span><span style="color: #008080"> 6</span> 
<span style="color: #008080"> 7</span> <span style="color: #0000ff">import</span><span style="color: #000000"> javax.annotation.Resource;
</span><span style="color: #008080"> 8</span> 
<span style="color: #008080"> 9</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.jdbc.core.JdbcTemplate;
</span><span style="color: #008080">10</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.jdbc.core.RowMapper;
</span><span style="color: #008080">11</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.stereotype.Repository;
</span><span style="color: #008080">12</span> 
<span style="color: #008080">13</span> <span style="color: #0000ff">import</span><span style="color: #000000"> com.baobaotao.entity.User;
</span><span style="color: #008080">14</span> 
<span style="color: #008080">15</span> @Repository("userDao"<span style="color: #000000">)
</span><span style="color: #008080">16</span> <span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span> UserDaoImpl <span style="color: #0000ff">implements</span><span style="color: #000000"> UserDao {
</span><span style="color: #008080">17</span>     
<span style="color: #008080">18</span>     @Resource(name="jt"<span style="color: #000000">)
</span><span style="color: #008080">19</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> JdbcTemplate jt;
</span><span style="color: #008080">20</span> 
<span style="color: #008080">21</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> insert(User user) {
</span><span style="color: #008080">22</span>         
<span style="color: #008080">23</span>         String sql = "INSERT INTO t_user " + 
<span style="color: #008080">24</span>                 "(user_name, password) " + 
<span style="color: #008080">25</span>                 "VALUES " + 
<span style="color: #008080">26</span>                 "(?, ?) "<span style="color: #000000">;
</span><span style="color: #008080">27</span>         Object [] args =<span style="color: #000000"> {user.getUserName(), user.getPassword()};
</span><span style="color: #008080">28</span>         Integer num =<span style="color: #000000"> jt.update(sql, args);
</span><span style="color: #008080">29</span>         <span style="color: #0000ff">if</span>(num > 0<span style="color: #000000">) {
</span><span style="color: #008080">30</span>             System.out.println("插入数据成功"<span style="color: #000000">);
</span><span style="color: #008080">31</span>         } <span style="color: #0000ff">else</span><span style="color: #000000"> {
</span><span style="color: #008080">32</span>             System.out.println("插入数据失败"<span style="color: #000000">);
</span><span style="color: #008080">33</span> <span style="color: #000000">        }
</span><span style="color: #008080">34</span>         
<span style="color: #008080">35</span> <span style="color: #000000">    }
</span><span style="color: #008080">36</span>     
<span style="color: #008080">37</span>     <span style="color: #0000ff">public</span> List<User><span style="color: #000000"> findAll() {
</span><span style="color: #008080">38</span>         String sql = "SELECT * FROM t_user "<span style="color: #000000">;
</span><span style="color: #008080">39</span>         List<User> users = jt.query(sql, <span style="color: #0000ff">new</span><span style="color: #000000"> UserRowMapper());
</span><span style="color: #008080">40</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> users;
</span><span style="color: #008080">41</span> <span style="color: #000000">    }
</span><span style="color: #008080">42</span>     
<span style="color: #008080">43</span>     <span style="color: #008000">/**</span>
<span style="color: #008080">44</span> <span style="color: #008000">     * 结果集处理：经每一条查询记录转变成一个实体对象
</span><span style="color: #008080">45</span> <span style="color: #008000">     * </span><span style="color: #808080">@author</span><span style="color: #008000"> 三少
</span><span style="color: #008080">46</span> <span style="color: #008000">     *
</span><span style="color: #008080">47</span>      <span style="color: #008000">*/</span>
<span style="color: #008080">48</span>     <span style="color: #0000ff">class</span> UserRowMapper <span style="color: #0000ff">implements</span> RowMapper<User><span style="color: #000000"> {
</span><span style="color: #008080">49</span> 
<span style="color: #008080">50</span>         <span style="color: #0000ff">public</span> User mapRow(ResultSet rs, <span style="color: #0000ff">int</span> rowNum) <span style="color: #0000ff">throws</span><span style="color: #000000"> SQLException {
</span><span style="color: #008080">51</span>             User user = <span style="color: #0000ff">new</span><span style="color: #000000"> User();
</span><span style="color: #008080">52</span>             user.setUserId(rs.getInt("user_id"<span style="color: #000000">));
</span><span style="color: #008080">53</span>             user.setUserName(rs.getString("user_name"<span style="color: #000000">));
</span><span style="color: #008080">54</span>             user.setCredits(rs.getInt("credits"<span style="color: #000000">));
</span><span style="color: #008080">55</span>             user.setPassword(rs.getString("password"<span style="color: #000000">));
</span><span style="color: #008080">56</span>             user.setLastVisit(rs.getDate("last_visit"<span style="color: #000000">));
</span><span style="color: #008080">57</span>             user.setLastIp(rs.getString("last_ip"<span style="color: #000000">));
</span><span style="color: #008080">58</span>             <span style="color: #0000ff">return</span><span style="color: #000000"> user;
</span><span style="color: #008080">59</span> <span style="color: #000000">        }
</span><span style="color: #008080">60</span> <span style="color: #000000">    }
</span><span style="color: #008080">61</span>     
<span style="color: #008080">62</span> }

로그인 후 복사

UserDaoImpl

　　　　使用springJDBC操作数据库时，程序员只需要编写相关的sql语句，待定参数可以用？代替，然后调用JdbcTemplate类的相关方法来执行sql语句就行啦。

　　　　JdbcTemplate类中的主要方法

　　　　　　execute方法：可以用于执行任何SQL语句，一般用于执行DDL语句；
　　　　　　update方法及batchUpdate方法：update方法用于执行新增、修改、删除等语句;
　　　　　　batchUpdate方法用于执行批处理相关语句；
　　　　　　query方法及queryForXXX方法：用于执行查询相关语句
　　　　　　call方法：用于执行存储过程、函数相关语句。

　　　　　　注意：

　　　　　　　　使用query方法时有三个参数

　　　　　　　　　　参数1　　sql语句字符串

　　　　　　　　　　参数2　　未知参数组

　　　　　　　　　　参数3　　查询结果处理（就是讲每一条查询记录变成一个实体对象，三少的一般做法是编写一个实现了RowMapper接口的内部类，然后创建一个该内部类对象来作为参数3）

　　4.4 项目结构图

5 测试类

　　5.1 测试前需要启动spring容器，因为我们的代码中使用到了spring容器的功能

　　5.2 编写测试方法

<span style="color: #008080"> 1</span> <span style="color: #0000ff">package</span><span style="color: #000000"> testDao;
</span><span style="color: #008080"> 2</span> 
<span style="color: #008080"> 3</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.util.List;
</span><span style="color: #008080"> 4</span> 
<span style="color: #008080"> 5</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.junit.Before;
</span><span style="color: #008080"> 6</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.junit.Test;
</span><span style="color: #008080"> 7</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.context.ApplicationContext;
</span><span style="color: #008080"> 8</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.context.support.ClassPathXmlApplicationContext;
</span><span style="color: #008080"> 9</span> 
<span style="color: #008080">10</span> <span style="color: #0000ff">import</span><span style="color: #000000"> com.baobaotao.dao.UserDao;
</span><span style="color: #008080">11</span> <span style="color: #0000ff">import</span><span style="color: #000000"> com.baobaotao.entity.User;
</span><span style="color: #008080">12</span> 
<span style="color: #008080">13</span> <span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> TestDao {
</span><span style="color: #008080">14</span>     
<span style="color: #008080">15</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> ApplicationContext ac;
</span><span style="color: #008080">16</span>     <span style="color: #0000ff">private</span><span style="color: #000000"> UserDao userDao;
</span><span style="color: #008080">17</span>     
<span style="color: #008080">18</span> <span style="color: #000000">    @Before
</span><span style="color: #008080">19</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> init() {
</span><span style="color: #008080">20</span>         ac = <span style="color: #0000ff">new</span> ClassPathXmlApplicationContext("config/spring_mysql.xml"); <span style="color: #008000">//</span><span style="color: #008000"> 启动容器</span>
<span style="color: #008080">21</span> <span style="color: #000000">        System.out.println(ac);
</span><span style="color: #008080">22</span>         
<span style="color: #008080">23</span>         userDao = ac.getBean("userDao", UserDao.<span style="color: #0000ff">class</span>); <span style="color: #008000">//</span><span style="color: #008000"> 利用容器创建对象</span>
<span style="color: #008080">24</span> <span style="color: #000000">        System.out.println(userDao);
</span><span style="color: #008080">25</span> <span style="color: #000000">    }
</span><span style="color: #008080">26</span>     
<span style="color: #008080">27</span>     <span style="color: #008000">/**</span>
<span style="color: #008080">28</span> <span style="color: #008000">     * 测试插入数据
</span><span style="color: #008080">29</span>      <span style="color: #008000">*/</span>
<span style="color: #008080">30</span> <span style="color: #000000">    @Test
</span><span style="color: #008080">31</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> test01() {
</span><span style="color: #008080">32</span>         User user = <span style="color: #0000ff">new</span><span style="color: #000000"> User();
</span><span style="color: #008080">33</span>         user.setUserName("wym"<span style="color: #000000">);
</span><span style="color: #008080">34</span>         user.setPassword("111"<span style="color: #000000">);
</span><span style="color: #008080">35</span>         
<span style="color: #008080">36</span> <span style="color: #000000">        userDao.insert(user);
</span><span style="color: #008080">37</span> <span style="color: #000000">    }
</span><span style="color: #008080">38</span>     
<span style="color: #008080">39</span>     <span style="color: #008000">/**</span>
<span style="color: #008080">40</span> <span style="color: #008000">     * 测试查询所有数据
</span><span style="color: #008080">41</span>      <span style="color: #008000">*/</span>
<span style="color: #008080">42</span> <span style="color: #000000">    @Test
</span><span style="color: #008080">43</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> test02() {
</span><span style="color: #008080">44</span>         List<User> users =<span style="color: #000000"> userDao.findAll();
</span><span style="color: #008080">45</span>         <span style="color: #0000ff">for</span><span style="color: #000000">(User user : users) {
</span><span style="color: #008080">46</span> <span style="color: #000000">            System.out.println(user);
</span><span style="color: #008080">47</span> <span style="color: #000000">        }
</span><span style="color: #008080">48</span> <span style="color: #000000">    }
</span><span style="color: #008080">49</span>     
<span style="color: #008080">50</span>     
<span style="color: #008080">51</span> }

로그인 후 복사

测试类

위 내용은 springJDBC01은 springJDBC를 사용하여 데이터베이스를 작동합니다.의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!