<!--简单SQL-->
insert into userinfo (USERID, USERNAME, AGE) values(1001,'小明',20);
<!--Mybatis写法1，有序列，主键是自增ID，主键是序列-->
<insert id="insert" parameterType="com.zznode.modules.bean.UserInfo">
<selectKey resultType="java.lang.Integer" order="BEFORE" keyProperty="userid">
SELECT userinfo_userid_seq.nextval as userid from dual
</selectKey>
insert into EPG_ALARM_INFO (USERID, USERNAME, AGE)
values (#{userid}, #{username}, #{age})
</insert>
<!--Mybatis写法2，无序列，主键是uuid，字符串-->
<insert id="insert" parameterType="com.zznode.modules.bean.UserInfo">
insert into EPG_ALARM_INFO (USERID, USERNAME, AGE, TIME)
values (#{userid}, #{username}, #{age}, sysdate)
</insert>insert all into 的方式返回值由最后的select 决定：
<!--简单SQL, 方法1-->
INSERT ALL
INTO userinfo (USERID, USERNAME, AGE) values(1001,'小明',20)
INTO userinfo (USERID, USERNAME, AGE) values(1002,'小红',18)
INTO userinfo (USERID, USERNAME, AGE) values(1003,'张三',23)
select 3 from dual;
<!--简单SQL, 方法2-->
begin
insert into userinfo (USERID, USERNAME, AGE) values(1001,'小明',20);
insert into userinfo (USERID, USERNAME, AGE) values(1001,'小红',18);
insert into userinfo (USERID, USERNAME, AGE) values(1001,'张三',23);
end;
<!--简单SQL, 方法3-->
insert into userinfo (USERID, USERNAME, AGE)
select 1001, '小明', 20 from dual union all
select 1002, '小红', 18 from dual union all
select 1003, '张三', 23 from dual<!--Mybatis写法1，无序列-->
<insert id="insertBatch" parameterType="java.util.List">
INSERT ALL
<foreach collection="list" index="index" item="item">
INTO userinfo (USERID, USERNAME, AGE)
VALUES (#{item.userid}, #{item.username}, #{item.age})
</foreach>
select list.size from dual
</insert>
<!--Mybatis写法2，无序列-->
<insert id="insertBatch">
insert into EPG_ALARM_INFO (USERID, USERNAME, AGE)
<foreach collection="list" item="item" index="index" separator="union all">
<!-- <foreach collection="list" item="item" index="index" separator="union all" open="(" close=")"> -->
<!-- (select #{item.userid}, #{item.username}, #{item.age} from dual) -->
<!-- 上面带括号，下面不带括号，都可以，少量数据不带括号效率高 -->
select #{item.userid}, #{item.username}, #{item.age} from dual
</foreach>
</insert>
<!--Mybatis写法3，有序列-->
<insert id="insertBatch">
insert into EPG_ALARM_INFO (USERID, USERNAME, AGE)
SELECT userinfo_userid_seq.nextval, m.* FROM (
<foreach collection="list" item="item" index="index" separator="union all">
select #{item.username}, #{item.age} from dual
</foreach>
) m
</insert>minvalue n (/nominvalue)：最小值为n
maxvalue n (/nomaxvalue)：最大值为n
start with n：从n开始计数
increment by n：每次增加n
cache n (/nocache)：缓存n个sequence值 / 不缓存,如果缓存，则会有跳号的危险
noorder (/order)：不保证序列号按顺序生成请求
cycle n (/nocycle)：如果到达最大值n后，再次从start with n开始
currval：序列的当前值，新序列必须使用一次nextval 才能获取到值，否则会报错
nextval：表示序列的下一个值。新序列首次使用时获取的是该序列的初始值，从第二次使用时开始按照设置的步进递增
删除序列语法： drop sequence seq_表名
<!--
create sequence 序列名
increment by 1 --每次增加几个，我这里是每次增加1
start with 1 --从1开始计数
nomaxvalue --不设置最大值
nocycle --一直累加，不循环
nocache; --不建缓冲区
在插入语句中调用：序列名.nextval 生成自增主键。
-->
<!--创建序列-->
create sequence SEQ_USERINFO
minvalue 1
maxvalue 9999999999
start with 1
increment by 1
nocache;
<!--删除序列-->
drop sequence SEQ_USERINFOservice业务实现：
public List<TBadUserW> queryPageBadUserInfo(TbadUserQuery queryModel) {
log.info("分页查询请求参数，{}", JSON.toJSONString(queryModel));
int pageNum = queryModel.getPageNum(); // 开始页
int pageSize = queryModel.getPageSize(); // 每页数量
queryModel.setStart((pageNum - 1) * pageSize); // 开始行数 （+1后）
queryModel.setEnd(pageNum * pageSize); // 结束行数
List<TBadUserW> beans = badUserWDao.queryPageBadUserInfo(queryModel);
log.info("最终查询数量：", beans.size());
return beans;
}mapper.xml文件：
<select id="queryPageInfo" parameterType="com.zznode.test.bean.TbadUserQuery"
resultMap="BaseResultMap" >
SELECT tt.* FROM
(
<!--前端分页需要 total总记录-->
SELECT t.*, ROWNUM rown, COUNT (*) OVER () total FROM
(
select <include refid="Base_Column_List"/> from T_BAD_USER_W
<where>
<if test="city != null and city !=''">
and city = #{city}
</if>
<if test="county != null and county != ''">
and county = #{county}
</if>
<if test="startTime != null and startTime !=''">
and loadtime >= to_date(#{startTime} , 'yyyy-mm-dd hh34:mi:ss')
</if>
<if test="endTime != null and endTime !=''">
and loadtime <![CDATA[<=]]> to_date(#{endTime} , 'yyyy-mm-dd hh34:mi:ss')
</if>
</where>
)t
)tt
where tt.rown > #{start} and tt.rown <![CDATA[<=]]> #{end}
</select>service业务实现：
public List<TBadUserW> queryPageBadUserInfo(TbadUserQuery queryModel) {
log.info("分页查询请求参数，{}", JSON.toJSONString(queryModel));
List<TBadUserW> result = new ArrayList<>();
int pageNum = queryModel.getPageNum(); // 开始页
int pageSize = queryModel.getPageSize(); // 每页数量（可以每页设置为200/500/1000），每次查询的条数
boolean searchAll = true;
while (searchAll){
queryModel.setStart((pageNum - 1) * pageSize); // 开始行数 （+1后）
queryModel.setEnd(pageNum * pageSize); // 结束行数
List<TBadUserW> beans = badUserWDao.queryPageBadUserInfo(queryModel);
if (null == beans || beans.size() < pageSize) {
searchAll = false;
}
if (CollectionUtils.isNotEmpty(beans)) {
result.addAll(beans);
}
pageNum++;
}
log.info("最终查询数量：", result.size());
return result;
}mapper.xml文件编写
<!--这种写法是比较高效的分批查询方法，分批不需要查询total总量，不支持total-->
<select id="queryPageInfo" parameterType="com.zznode.test.bean.TbadUserQuery"
resultMap="BaseResultMap" >
SELECT tt.* FROM
(
SELECT t.*, ROWNUM rown FROM
(
select <include refid="Base_Column_List"/> from T_BAD_USER_W
<where>
<if test="city != null and city !=''">
and city = #{city}
</if>
<if test="county != null and county != ''">
and county = #{county}
</if>
<if test="startTime != null and startTime !=''">
and loadtime >= to_date(#{startTime} , 'yyyy-mm-dd hh34:mi:ss')
</if>
<if test="endTime != null and endTime !=''">
and loadtime <![CDATA[<=]]> to_date(#{endTime} , 'yyyy-mm-dd hh34:mi:ss')
</if>
</where>
)t where ROWNUM <![CDATA[<=]]> #{end}
)tt
where tt.rown > #{start}
</select>以上是基于Java怎么用Mybatis实现oracle批量插入及分页查询的详细内容。更多信息请关注PHP中文网其他相关文章！
