Spring Boot简单xml配置集成mybatis

Posted 2020-09-27

一、xml配置版

1.properties文件中增加的配置：

　　mybatis.config-locations=classpath:mybatis/mybatis-config.xml

　　mybatis.mapper-locations=classpath:mybatis/mapper/*.xml

2.mybatis-config.xml文件的配置

　　mapper文件里面的jdbcType重命名

<configuration> 
<typeAliases> 
<typeAlias alias="Integer" type="java.lang.Integer" /> 
<typeAlias alias="Long" type="java.lang.Long" /> 
<typeAlias alias="HashMap" type="java.util.HashMap" /> 
<typeAlias alias="LinkedHashMap" type="java.util.LinkedHashMap" /> 
<typeAlias alias="ArrayList" type="java.util.ArrayList" /> 
<typeAlias alias="LinkedList" type="java.util.LinkedList" /> </typeAliases> 
</configuration>

3.添加User的映射文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 
<mapper namespace="com.neo.mapper.UserMapper" > 
　　<resultMap id="BaseResultMap" type="com.neo.entity.UserEntity" > 
　　　　<id column="id" property="id" jdbcType="BIGINT" /> 
　　　　<result column="userName" property="userName" jdbcType="VARCHAR" /> 
　　　　<result column="passWord" property="passWord" jdbcType="VARCHAR" /> 
　　　　<result column="user_sex" property="userSex" javaType="com.neo.enums.UserSexEnum"/> 
　　　　<result column="nick_name" property="nickName" jdbcType="VARCHAR" /> 
　　</resultMap> 
<sql id="Base_Column_List" > id, userName, passWord, user_sex, nick_name </sql> 
<select id="getAll" resultMap="BaseResultMap" > SELECT <include refid="Base_Column_List" /> FROM users </select> <select id="getOne" parameterType="java.lang.Long" resultMap="BaseResultMap" > SELECT 
<include refid="Base_Column_List" /> FROM users WHERE id = #{id} </select> 
<insert id="insert" parameterType="com.neo.entity.UserEntity" > INSERT INTO users (userName,passWord,user_sex) VALUES (#{userName}, #{passWord}, #{userSex}) </insert> 
<update id="update" parameterType="com.neo.entity.UserEntity" > UPDATE users SET 
　　<if test="userName != null">userName = #{userName},</if> 
　　<if test="passWord != null">passWord = #{passWord},</if> 
　　nick_name = #{nickName} WHERE id = #{id} 
</update> 
<delete id="delete" parameterType="java.lang.Long" > 
　　DELETE FROM users WHERE id =#{id} 
</delete> 
</mapper>

 

4.dao层的接口

public interface UserMapper { 
    List<UserEntity> getAll(); 
    UserEntity getOne(Long id); 
    void insert(UserEntity user); 
    void update(UserEntity user); 
    void delete(Long id); 
}

 

5.单元测试：见注解方式集成mybatis事例

 

6.可能会出现的问题：

解决方法;