标签:select app vbscrip 执行 formdata 步骤 insert 批量删除 char
<!--批量增加测试-->
<insert id="insertList" parameterType="java.util.List">
insert into t_enterprise_water_ele
(
/*方法一*/
-- WATER_ELE_ID,
-- ENTERPRISE_ID,
-- ENTERPRISE_USCC,
-- ENTERPRISE_NAME,
-- YEARMONTH,
-- WATER_SIZE,
-- WATER_AMOUNT,
-- ELE_SIZE,
-- ELE_AMOUNT,
-- STATUS,
-- OPERATOR,
-- OPERATE_TIME
/*方法二*/
<include refid="Base_Column_List"/>
)
VALUES
<foreach collection="list" item="item" index="index" separator=",">
(
#{item.waterEleId,jdbcType=VARCHAR},
#{item.enterpriseId,jdbcType=VARCHAR},
#{item.enterpriseUscc,jdbcType=VARCHAR},
#{item.enterpriseName,jdbcType=VARCHAR},
#{item.yearmonth,jdbcType=VARCHAR},
#{item.waterSize,jdbcType=DECIMAL},
#{item.waterAmount,jdbcType=VARCHAR},
#{item.eleSize,jdbcType=DOUBLE},
#{item.eleAmount,jdbcType=VARCHAR},
#{item.status,jdbcType=INTEGER},
#{item.operator,jdbcType=VARCHAR},
#{item.operateTime,jdbcType=TIMESTAMP}
)
</foreach>
</insert>
int insertList(List<WaterEle> list);
foreach的主要用在构建in条件中,它可以在SQL语句中进行迭代一个集合。
foreach元素的属性主要有 item,index,collection,open,separator,close。
item表示集合中每一个元素进行迭代时的别名
index指定一个名字,用于表示在迭代过程中,每次迭代到的位置
open表示该语句以什么开始
separator表示在每次进行迭代之间以什么符号作为分隔 符
close表示以什么结束
在使用foreach的时候最关键的也是最容易出错的就是collection属性,该属性是必须指定的,但是在不同情况 下,该属性的值是不一样的,主要有一下3种情况:
1.如果传入的是单参数且参数类型是一个List的时候,collection属性值为list
2.如果传入的是单参数且参数类型是一个array数组的时候,collection的属性值为array
3.如果传入的参数是多个的时候,我们就需要把它们封装成一个Map了,当然单参数也可以封装成map
使用批量插入执行的SQL语句应该等价于:
insert into redeem_code (batch_id, code, type, facevalue,create_user,create_time)
values (?,?,?,?,?,? ),(?,?,?,?,?,? ),(?,?,?,?,?,? ),(?,?,?,?,?,? )
int deleteByBatch(@Param(value = "array")String[] array);
int deleteByBatch(@Param(value = "list")List list);
<delete id="deleteByBatch" parameterType="java.lang.String">
delete from t_enterprise_output_value
where OUTPUT_ID IN
<foreach collection="array" item="outputId" open="(" separator="," close=")">
#{outputId}
</foreach>
</delete>
因为表中没有fileIds字段,所以如果传map进入的话,需要在map中定义该字段
map.put("fileIds","1,2,3");
//美元符$直接注入(原样注入)
<delete id="deleteByPrimaryKey" parameterType="java.util.Map">
DELETE FROM t_attachment WHERE FILE_ID IN (${fileIds})
</delete>
DELETE FROM t_attachment WHERE FILE_ID IN (1,2,3)
适用于表中该字段是int或者bigint类型,不适用于varchar。
DELETE FROM t_attachment WHERE FILE_ID IN ("1","2","3")
数组/集合 -->(1,2,3,4)
String userIdList = formData.get("userIdList");
String[] users = userIdList.split(",");
String str = "";
for (String user : users) {
str += "\"" + user + "\"" + ",";
}
String substring = str.substring(0, str.lastIndexOf(","));
System.out.println(substring);
如果删除不是以主键为条件,而是多个条件同时成立才可以删除
userIds可以是数组或者list或者map
上面的SYSCODE和ROLE_ID,可以直接传递
int deleteByUserIdSysRoleBatch(@Param(value="sysCode") String sysCode,@Param(value="roleId") String roleId,@Param(value="userIds")int[] userIds);
int deleteByUserIdSysRoleBatch(@Param(value="sysCode") String sysCode,@Param(value="roleId") String roleId,@Param(value="userIds")List<Integer> userIds);
<delete id="deleteByUserIdSysRoleBatch">
delete from t_user_role
where SYSCODE = #{sysCode,jdbcType=VARCHAR} AND ROLE_ID = #{roleId,jdbcType=VARCHAR}
AND USER_ID IN
<foreach collection="userIds" item="item" index="index" open="(" separator="," close=")">
#{item}
</foreach>
</delete>
<delete id="deleteByRole" parameterType="java.util.Map">
DELETE
FROM
t_user_role
<where>
<if test="userIdList != null">
USER_ID IN (#{userIdList,jdbcType=VARCHAR})
</if>
<if test="roleId != null">
AND ROLE_ID=#{roleId,jdbcType=VARCHAR}
</if>
<if test="sysCode != null">
AND SYSCODE=#{sysCode}
</if>
</where>
</delete>
<select id="selectOrder" parameterType="java.util.Map" resultMap="OrderMap">
SELECT * FROM t_ WHERE
ORDER_ID in
<foreach collection="list" item="item" index="index" open="(" separator="," close=")">
#{item}
</foreach>
</select>
<select id="selectOrder" parameterType="java.util.Map" resultMap="OrderMap">
SELECT * FROM t_ WHERE ORDER_ID in (${orderList})
</select>
==> Preparing: SELECT * FROM t_order WHERE ORDER_ID in (?)
==> Parameters: 1,2,5(String)
<== Columns: ORDER_ID, GOODS_ID, UNIT_PRICE, SOLD_NUM, ORDER_STATUS, OPERATOR, OPERATE_TIME
<== Row: 1, 356346093, 43.00, 3, 109002, yyadmin, 2017-12-16 21:01:20.0
<== Total: 1
注意"1,2,5"传过来的是String类型,实际sql语句如下:
SELECT * FROM t_order WHERE ORDER_ID in (#{orderList})
SELECT * FROM t_order WHERE ORDER_ID in (‘1,2,5‘)只能查到一条
将mapper.xml中的sql语句改为
SELECT * FROM t_order WHERE ORDER_ID in (${orderList})
SELECT * FROM t_order WHERE ORDER_ID in (1,2,5)就可以全部查到。
SELECT * FROM t_order WHERE ORDER_ID in (#{orderList})
SELECT * FROM t_order WHERE ORDER_ID in (‘1,2,5‘)查询不到
将mapper.xml中的sql语句改为
SELECT * FROM t_order WHERE ORDER_ID in (${orderList})
SELECT * FROM t_order WHERE ORDER_ID in (‘1‘,‘2‘,‘5‘)就可以全部
‘1,2,5‘转为‘1‘,‘2‘,‘5‘步骤如下:
String categoryIdList = (String) formData.get("categoryIdList");
if (!StringUtils.isEmpty(categoryIdList)) {
String[] split = categoryIdList.split(",");
String sqlParamter = "";
for (String s : split) {
sqlParamter += "‘" + s + "‘,";
}
String substring = sqlParamter.substring(0, sqlParamter.length() - 1);
formData.put("categoryIdList", substring);
}
链接:https://www.jianshu.com/p/041bec8ae6d3
标签:select app vbscrip 执行 formdata 步骤 insert 批量删除 char
原文地址:https://www.cnblogs.com/personsiglewine/p/12890536.html