配置好了dataSource之后，想测试一下有没有配置成功
package com.yang.Controller;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
* Created by Yang on 2017/6/6.
*/
@RestController
public class TestController {
@Autowired
private DruidDataSource dataSource;
@RequestMapping("/hello")
public String index() {
String sql = "select * from reader;";
String str = "";
PreparedStatement ps = null;
ResultSet rs = null;
try {
ps = dataSource.getConnection().prepareStatement(sql);
rs = ps.executeQuery();
while (rs.next()){
str = rs.getString(2);
}
} catch (SQLException e) {
e.printStackTrace();
}
return str;
}
}
这个TestController是可以跑成功的，我想把dataSource.getConnection()再封装一下
package com.yang.Utils;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.pool.DruidPooledConnection;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.sql.SQLException;
/**
* Created by Yang on 2017/6/6.
*/
public class ConnectionManager {
private Logger logger = LoggerFactory.getLogger(ConnectionManager.class);
@Autowired
private DruidDataSource dataSource;
private static volatile ConnectionManager connectionManager;
private ConnectionManager(){}
public static ConnectionManager getInstance(){
if(connectionManager == null){
synchronized (ConnectionManager.class){
if(connectionManager == null){
connectionManager = new ConnectionManager();
}
}
}
return connectionManager;
}
public DruidPooledConnection getConn(){
DruidPooledConnection conn = null;
try {
conn = dataSource.getConnection();
} catch (SQLException e) {
logger.error("get connection error,the connection is null", e);
e.printStackTrace();
}
return conn;
}
}
写了这个ConnectionManager，但是在这个类里面，dataSource是null，不知道怎么回事，想请教一下大家。
另外还有一个问题，在使用Spring Boot的时候，如何进行单元测试，我开始用单元测试测试一个ConnectionManager，但是一直不成功
D:\Java\jdk_8u92\bin\java -Dspring.output.ansi.enabled=always -Didea.launcher.port=7532 "-Didea.launcher.bin.path=D:\develop\idea\IntelliJ IDEA 2016.2.5\bin" -Dfile.encoding=UTF-8 -classpath "D:\environment\Java\jdk_8u92\jre\lib\charsets.jar;D:\environment\Java\jdk_8u92\jre\lib\deploy.jar;D:\environment\Java\jdk_8u92\jre\lib\ext\access-bridge-64.jar;D:\environment\Java\jdk_8u92\jre\lib\ext\cldrdata.jar;D:\environment\Java\jdk_8u92\jre\lib\ext\dnsns.jar;D:\environment\Java\jdk_8u92\jre\lib\ext\jaccess.jar;D:\environment\Java\jdk_8u92\jre\lib\ext\jfxrt.jar;D:\environment\Java\jdk_8u92\jre\lib\ext\localedata.jar;D:\environment\Java\jdk_8u92\jre\lib\ext\nashorn.jar;D:\environment\Java\jdk_8u92\jre\lib\ext\sunec.jar;D:\environment\Java\jdk_8u92\jre\lib\ext\sunjce_provider.jar;D:\environment\Java\jdk_8u92\jre\lib\ext\sunmscapi.jar;D:\environment\Java\jdk_8u92\jre\lib\ext\sunpkcs11.jar;D:\environment\Java\jdk_8u92\jre\lib\ext\zipfs.jar;D:\environment\Java\jdk_8u92\jre\lib\javaws.jar;D:\environment\Java\jdk_8u92\jre\lib\jce.jar;D:\environment\Java\jdk_8u92\jre\lib\jfr.jar;D:\environment\Java\jdk_8u92\jre\lib\jfxswt.jar;D:\environment\Java\jdk_8u92\jre\lib\jsse.jar;D:\environment\Java\jdk_8u92\jre\lib\management-agent.jar;D:\environment\Java\jdk_8u92\jre\lib\plugin.jar;D:\environment\Java\jdk_8u92\jre\lib\resources.jar;D:\environment\Java\jdk_8u92\jre\lib\rt.jar;E:\myJava\LibraryManager\target\classes;D:\environment\maven\repository\org\springframework\boot\spring-boot-starter.4.1.RELEASE\spring-boot-starter-1.4.1.RELEASE.jar;D:\environment\maven\repository\org\springframework\boot\spring-boot.4.1.RELEASE\spring-boot-1.4.1.RELEASE.jar;D:\environment\maven\repository\org\springframework\spring-core.3.3.RELEASE\spring-core-4.3.3.RELEASE.jar;D:\environment\maven\repository\org\springframework\spring-context.3.3.RELEASE\spring-context-4.3.3.RELEASE.jar;D:\environment\maven\repository\org\springframework\spring-aop.3.3.RELEASE\spring-aop-4.3.3.RELEASE.jar;D:\environment\maven\repository\org\springframework\spring-beans.3.3.RELEASE\spring-beans-4.3.3.RELEASE.jar;D:\environment\maven\repository\org\springframework\spring-expression.3.3.RELEASE\spring-expression-4.3.3.RELEASE.jar;D:\environment\maven\repository\org\springframework\boot\spring-boot-autoconfigure.4.1.RELEASE\spring-boot-autoconfigure-1.4.1.RELEASE.jar;D:\environment\maven\repository\org\springframework\boot\spring-boot-starter-logging.4.1.RELEASE\spring-boot-starter-logging-1.4.1.RELEASE.jar;D:\environment\maven\repository\ch\qos\logback\logback-classic.1.7\logback-classic-1.1.7.jar;D:\environment\maven\repository\ch\qos\logback\logback-core.1.7\logback-core-1.1.7.jar;D:\environment\maven\repository\org\slf4j\slf4j-api.7.21\slf4j-api-1.7.21.jar;D:\environment\maven\repository\org\slf4j\jcl-over-slf4j.7.21\jcl-over-slf4j-1.7.21.jar;D:\environment\maven\repository\org\slf4j\jul-to-slf4j.7.21\jul-to-slf4j-1.7.21.jar;D:\environment\maven\repository\org\slf4j\log4j-over-slf4j.7.21\log4j-over-slf4j-1.7.21.jar;D:\environment\maven\repository\org\yaml\snakeyaml.17\snakeyaml-1.17.jar;D:\environment\maven\repository\junit\junit.10\junit-4.10.jar;D:\environment\maven\repository\org\hamcrest\hamcrest-core.3\hamcrest-core-1.3.jar;D:\environment\maven\repository\org\springframework\boot\spring-boot-starter-web.4.1.RELEASE\spring-boot-starter-web-1.4.1.RELEASE.jar;D:\environment\maven\repository\org\springframework\boot\spring-boot-starter-tomcat.4.1.RELEASE\spring-boot-starter-tomcat-1.4.1.RELEASE.jar;D:\environment\maven\repository\org\apache\tomcat\embed\tomcat-embed-core.5.5\tomcat-embed-core-8.5.5.jar;D:\environment\maven\repository\org\apache\tomcat\embed\tomcat-embed-el.5.5\tomcat-embed-el-8.5.5.jar;D:\environment\maven\repository\org\apache\tomcat\embed\tomcat-embed-websocket.5.5\tomcat-embed-websocket-8.5.5.jar;D:\environment\maven\repository\org\hibernate\hibernate-validator.2.4.Final\hibernate-validator-5.2.4.Final.jar;D:\environment\maven\repository\javax\validation\validation-api.1.0.Final\validation-api-1.1.0.Final.jar;D:\environment\maven\repository\org\jboss\logging\jboss-logging.3.0.Final\jboss-logging-3.3.0.Final.jar;D:\environment\maven\repository\com\fasterxml\classmate.3.1\classmate-1.3.1.jar;D:\environment\maven\repository\com\fasterxml\jackson\core\jackson-databind.8.3\jackson-databind-2.8.3.jar;D:\environment\maven\repository\com\fasterxml\jackson\core\jackson-annotations.8.3\jackson-annotations-2.8.3.jar;D:\environment\maven\repository\com\fasterxml\jackson\core\jackson-core.8.3\jackson-core-2.8.3.jar;D:\environment\maven\repository\org\springframework\spring-web.3.3.RELEASE\spring-web-4.3.3.RELEASE.jar;D:\environment\maven\repository\org\springframework\spring-webmvc.3.3.RELEASE\spring-webmvc-4.3.3.RELEASE.jar;D:\environment\maven\repository\org\mybatis\spring\boot\mybatis-spring-boot-starter.1.1\mybatis-spring-boot-starter-1.1.1.jar;D:\environment\maven\repository\org\mybatis\spring\boot\mybatis-spring-boot-autoconfigure.1.1\mybatis-spring-boot-autoconfigure-1.1.1.jar;D:\environment\maven\repository\org\mybatis\mybatis.4.0\mybatis-3.4.0.jar;D:\environment\maven\repository\org\mybatis\mybatis-spring.3.0\mybatis-spring-1.3.0.jar;D:\environment\maven\repository\org\springframework\boot\spring-boot-starter-jdbc.4.1.RELEASE\spring-boot-starter-jdbc-1.4.1.RELEASE.jar;D:\environment\maven\repository\org\apache\tomcat\tomcat-jdbc.5.5\tomcat-jdbc-8.5.5.jar;D:\environment\maven\repository\org\apache\tomcat\tomcat-juli.5.5\tomcat-juli-8.5.5.jar;D:\environment\maven\repository\org\springframework\spring-jdbc.3.3.RELEASE\spring-jdbc-4.3.3.RELEASE.jar;D:\environment\maven\repository\org\springframework\spring-tx.3.3.RELEASE\spring-tx-4.3.3.RELEASE.jar;D:\environment\maven\repository\mysql\mysql-connector-java.1.39\mysql-connector-java-5.1.39.jar;D:\environment\maven\repository\org\springframework\boot\spring-boot-devtools.4.1.RELEASE\spring-boot-devtools-1.4.1.RELEASE.jar;D:\environment\maven\repository\com\alibaba\druid.0.29\druid-1.0.29.jar;D:\environment\Java\jdk_8u92\jre\..\lib\jconsole.jar;D:\environment\Java\jdk_8u92\jre\..\lib\tools.jar;D:\develop\idea\IntelliJ IDEA 2016.2.5\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain com.yang.Application
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/\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.4.1.RELEASE)
2017-06-06 23:18:44.851 INFO 52496 --- [ restartedMain] com.yang.Application : Starting Application on Yang with PID 52496 (E:\myJava\LibraryManager\target\classes started by Yang in E:\myJava\LibraryManager)
2017-06-06 23:18:44.856 INFO 52496 --- [ restartedMain] com.yang.Application : No active profile set, falling back to default profiles: default
2017-06-06 23:18:45.257 INFO 52496 --- [ restartedMain] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@46a9c0: startup date [Tue Jun 06 23:18:45 CST 2017]; root of context hierarchy
2017-06-06 23:18:47.356 WARN 52496 --- [ restartedMain] o.m.s.mapper.ClassPathMapperScanner : No MyBatis mapper was found in '[com.yang.Mapper]' package. Please check your configuration.
2017-06-06 23:18:47.674 WARN 52496 --- [ restartedMain] o.m.s.mapper.ClassPathMapperScanner : No MyBatis mapper was found in '[com.yang]' package. Please check your configuration.
2017-06-06 23:18:48.316 INFO 52496 --- [ restartedMain] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [class org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$d3489f7] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2017-06-06 23:18:49.813 INFO 52496 --- [ restartedMain] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-06-06 23:18:49.835 INFO 52496 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service Tomcat
2017-06-06 23:18:49.837 INFO 52496 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.5
2017-06-06 23:18:50.072 INFO 52496 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-06-06 23:18:50.072 INFO 52496 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 4821 ms
2017-06-06 23:18:50.448 INFO 52496 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-06-06 23:18:50.456 INFO 52496 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-06-06 23:18:50.457 INFO 52496 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-06-06 23:18:50.457 INFO 52496 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-06-06 23:18:50.457 INFO 52496 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2017-06-06 23:18:50.609 WARN 52496 --- [ restartedMain] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'connectionManager': Unsatisfied dependency expressed through field 'dataSource'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean found for dependency [com.alibaba.druid.pool.DruidDataSource]: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2017-06-06 23:18:50.616 INFO 52496 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service Tomcat
2017-06-06 23:18:50.650 WARN 52496 --- [ost-startStop-1] o.a.c.loader.WebappClassLoaderBase : The web application [ROOT] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:43)
2017-06-06 23:18:50.685 INFO 52496 --- [ restartedMain] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-06-06 23:18:50.984 ERROR 52496 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Field dataSource in com.yang.Utils.ConnectionManager required a bean of type 'com.alibaba.druid.pool.DruidDataSource' that could not be found.
Action:
Consider defining a bean of type 'com.alibaba.druid.pool.DruidDataSource' in your configuration.
Process finished with exit code 0
package com.yang.Configuration;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
/**
* Created by Yang on 2017/6/6.
*/
@Configuration
@EnableAutoConfiguration
public class DruidDBConfig {
private Logger logger = LoggerFactory.getLogger(DruidDBConfig.class);
@Value("${spring.datasource.url}")
private String dbUrl;
@Value("${spring.datasource.username}")
private String username;
@Value("${spring.datasource.password}")
private String password;
@Value("${spring.datasource.driverClassName}")
private String driverClassName;
@Value("${spring.datasource.initialSize}")
private int initialSize;
@Value("${spring.datasource.minIdle}")
private int minIdle;
@Value("${spring.datasource.maxActive}")
private int maxActive;
@Value("${spring.datasource.maxWait}")
private int maxWait;
@Value("${spring.datasource.timeBetweenEvictionRunsMillis}")
private int timeBetweenEvictionRunsMillis;
@Value("${spring.datasource.minEvictableIdleTimeMillis}")
private int minEvictableIdleTimeMillis;
@Value("${spring.datasource.validationQuery}")
private String validationQuery;
@Value("${spring.datasource.testWhileIdle}")
private boolean testWhileIdle;
@Value("${spring.datasource.testOnBorrow}")
private boolean testOnBorrow;
@Value("${spring.datasource.testOnReturn}")
private boolean testOnReturn;
@Value("${spring.datasource.poolPreparedStatements}")
private boolean poolPreparedStatements;
@Value("${spring.datasource.maxPoolPreparedStatementPerConnectionSize}")
private int maxPoolPreparedStatementPerConnectionSize;
@Value("${spring.datasource.filters}")
private String filters;
@Value("{spring.datasource.connectionProperties}")
private String connectionProperties;
@Bean //声明其为Bean实例
@Primary //在同样的DataSource中，首先使用被标注的DataSource
public DruidDataSource dataSource(){
DruidDataSource datasource = new DruidDataSource();
datasource.setUrl(this.dbUrl);
datasource.setUsername(username);
datasource.setPassword(password);
datasource.setDriverClassName(driverClassName);
//configuration
datasource.setInitialSize(initialSize);
datasource.setMinIdle(minIdle);
datasource.setMaxActive(maxActive);
datasource.setMaxWait(maxWait);
datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
datasource.setValidationQuery(validationQuery);
datasource.setTestWhileIdle(testWhileIdle);
datasource.setTestOnBorrow(testOnBorrow);
datasource.setTestOnReturn(testOnReturn);
datasource.setPoolPreparedStatements(poolPreparedStatements);
datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
try {
datasource.setFilters(filters);
} catch (SQLException e) {
logger.error("druid configuration initialization filter", e);
}
datasource.setConnectionProperties(connectionProperties);
return datasource;
}
@Bean
public ServletRegistrationBean druidServletRegistrationBean() {
ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean();
servletRegistrationBean.setServlet(new StatViewServlet());
servletRegistrationBean.addUrlMappings("/druid/*");
return servletRegistrationBean;
}
/**
* 注册DruidFilter拦截
*
* @return
*/
@Bean
public FilterRegistrationBean duridFilterRegistrationBean() {
FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
filterRegistrationBean.setFilter(new WebStatFilter());
Map<String, String> initParams = new HashMap<String, String>();
//设置忽略请求
initParams.put("exclusions", "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*");
filterRegistrationBean.setInitParameters(initParams);
filterRegistrationBean.addUrlPatterns("/*");
return filterRegistrationBean;
}
}
ConnectionManager 这个类没有@Component声明，spring无法管理这个类，也无法注入dataSource
注入错误，前面的是正解，没有Component声明，需要通过配置文件，让Spring管理这个bean，后续才能正确注入。
然后测试，可以使用spring-boot-starter-test，里面包含junit，mock，assertJ等，spring-boot的官方文档对于测试又很详细的说明，可以看一下。提供了很多方便的注解，大体上首先要在测试类上加上两个：
@RunWith(SpringRunner.class)
@SpringBootTest
其次还有加载不同配置文件的注解，建议看文档