mybatis如何遍历Map的key和value【增删改查】

 

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mybatis如何遍历Map的key和value

2017年11月28日 10:07:57 Joker_Ye 阅读数：4158

 

1.sql.xml

1. "1.0" encoding="UTF-8"?>
3. "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
5. <mapper namespace="com.genius">
6.  
8. <select id="selectOne" parameterType="java.util.HashMap"
9. resultType="java.util.HashMap">
10. select count(*) as num from ${tableName} where seq =
11. #{seq};
12. select>
13.  
15. <insert id="insertOne" parameterType="java.util.Map">
16. insert into ${tableName}
17. <foreach collection="content.keys" item="key" open="(" close=")"
18. separator=",">
19. ${key}
20. foreach>
21. values
22. <foreach collection="content.values" item="value" open="("
23. close=")" separator=",">
24. #{value}
25. foreach>
26. insert>
27.  
29. <update id="updateOne" parameterType="java.util.Map">
30. UPDATE ${tableName} SET
31. <foreach collection="content.keys" item="key" open="" close=""
32. separator=",">
33. ${key} = #{content[${key}]}
34. foreach>
35. where seq = #{content[seq]} and genius_uid <=
36. #{content[genius_uid]};
37. update>
38.  
40. <delete id="deleteOne" parameterType="java.util.Map">
41. delete from ${tableName}
42. where seq = #{content[seq]};
43. delete>
44.  
45. mapper>

2.java代码：

1. SqlSession session = MyBatisConnectionFactory.getSession( "pg");
2. HashMap params = new HashMap<>(); //传入的参数
3. params.put( "content", tableContent);
4. params.put( "tableName", tableName);
5. params.put( "seq", seq);
6. int flag = session.delete("deleteOne", params); //删除记录
7. HashMap map = session.selectOne( "selectOne", params); //查询记录是否存在
8. flag = session.update( "updateOne", params) > 0 ? true : false; //更新
9. flag = session.insert( "insertOne", params) > 0 ? true : false; //新增

转载于:https://www.cnblogs.com/libin6505/p/10899619.html