Spring Boot Mybatis 搞反向工程，太方便咯。。
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1. 拷贝 Mybatis 反向工程配置文件到项目的根目录下
2. 根据项目及表的情况，修改 GeneratorMapper.xml 配置
如果使用 高版本 ， 驱动类变为：com.mysql.cj.jdbc.Driver
url 后面应该加属性 nullCatalogMeansCurrent=true ，否则生成有问题
主要根据注释来修改自己的内容
"1.0" encoding="UTF-8"?>
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
"E:\Java\tool\maven_repository\mysql\mysql-connector-java\5.1.9\mysql-connector-java-5.1.9.jar"/>
"tables" targetRuntime="MyBatis3">
"suppressAllComments" value="true"/>
"com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/springboot"
userId="root"
password="123456">
"com.md.springboot.model"
targetProject="src/main/java">
"enableSubPackages" value="false"/>
"trimStrings" value="false"/>
"com.md.springboot.mapper"
targetProject="src/main/java">
"enableSubPackages" value="false"/>
type="XMLMAPPER"
targetPackage="com.md.springboot.mapper" targetProject="src/main/java">
"enableSubPackages" value="false"/>
"t_student" domainObjectName="Student"
enableCountByExample="false"
enableUpdateByExample="false"
enableDeleteByExample="false"
enableSelectByExample="false"
selectByExampleQueryId="false"/>
此时会报错，如下
这个时候可以不用理会，项目也是会正常运行的，当然也可以这样：
添加之后就不会报红了。
Spring Boot 理论+实战系列教程大家看这个：
https://github.com/javastacks/spring-boot-best-practice
3. 在pom.xml 文件中添加 mysql 反向工程依赖
org.mybatis.generator
mybatis-generator-maven-plugin
1.3.6
GeneratorMapper.xml
true
true
4. 双击生成相关文件
5. 生成的文件
自动生成model/Student、实体类
以及StudentMapper，接口
StudentMapper.xml 具体对数据库的操作
这样方便我们使用，具体的下面详细介绍，注意看注释
Student
package com.md.springboot.model;
public class Student {
private Integer id;
private String name;
private Integer age;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}
StudentMapper
package com.md.springboot.mapper;
import com.md.springboot.model.Student;
public interface StudentMapper {
int deleteByPrimaryKey(Integer id);
int insert(Student record);
int insertSelective(Student record);
Student selectByPrimaryKey(Integer id);
int updateByPrimaryKeySelective(Student record);
int updateByPrimaryKey(Student record);
}
StudentMapper.xml
"1.0" encoding="UTF-8"?>
"-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
"com.md.springboot.mapper.StudentMapper">
"BaseResultMap" type="com.md.springboot.model.Student">
"id" jdbcType="INTEGER" property="id" />
"name" jdbcType="VARCHAR" property="name" />
"age" jdbcType="INTEGER" property="age" />
"Base_Column_List">
id, name, age
"selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
select
"Base_Column_List" />
from t_student
where id = #{id,jdbcType=INTEGER}
"deleteByPrimaryKey" parameterType="java.lang.Integer">
delete from t_student
where id = #{id,jdbcType=INTEGER}
"insert" parameterType="com.md.springboot.model.Student">
insert into t_student (id, name, age
)
values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{age,jdbcType=INTEGER}
)
"insertSelective" parameterType="com.md.springboot.model.Student">
insert into t_student
"(" suffix=")" suffixOverrides=",">
<if test="id != null">
id,
if>
<if test="name != null">
name,
if>
<if test="age != null">
age,
if>
"values (" suffix=")" suffixOverrides=",">
<if test="id != null">
#{id,jdbcType=INTEGER},
if>
<if test="name != null">
#{name,jdbcType=VARCHAR},
if>
<if test="age != null">
#{age,jdbcType=INTEGER},
if>
"updateByPrimaryKeySelective" parameterType="com.md.springboot.model.Student">
update t_student
<set>
<if test="name != null">
name = #{name,jdbcType=VARCHAR},
if>
<if test="age != null">
age = #{age,jdbcType=INTEGER},
if>
set>
where id = #{id,jdbcType=INTEGER}
"updateByPrimaryKey" parameterType="com.md.springboot.model.Student">
update t_student
set name = #{name,jdbcType=VARCHAR},
age = #{age,jdbcType=INTEGER}
where id = #{id,jdbcType=INTEGER}
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