【Mybatis】Mybatis入门概述及第一个Mybatis实例实现增删改查 【Mybatis】Mybatis接口编程方式实现增删改查

      林炳文Evankaka原创作品。转自https://blog.csdn.net/Evankaka/article/details/45744243

       在【Mybatis】Mybatis入门概述及第一个Mybatis实例实现增删改查 和【Mybatis】Mybatis接口编程方式实现增删改查 演示了如何使用XML来操作Mybatis实现CRUD，但是大量的XML配置文件的编写是非常烦人的。因此Mybatis也提供了基于注解的配置方式，下面我们来演示一下使用接口加注解来实现CRUD的的例子。

本文工程免费下载

一、创建数据库、数据表

    
    
use test;
create table t_employeer(
employeer_id int not null primary key AUTO_INCREMENT ,
employeer_name varchar( 50) default null,
employeer_age int default null,
employeer_department varchar( 100) default null,
employeer_worktype varchar( 100) default null
)
    
    

二、创建工程

整个工程目录如下：

记得要导入相应的包！

1、雇员对应的类Employeer.java

    
    
package com.mucfc.model;
/**
* 雇员信息类
*@author linbingwen
*@time 2015.5.11
*/
public class Employeer {
private Integer employeer_id;
private String employeer_name;
private Integer employeer_age ;
private String employeer_department;
private String employeer_worktype;

public Employeer() {
super();
}
public Integer getEmployeer_id() {
return employeer_id;
}
public void setEmployeer_id(Integer employeer_id) {
this.employeer_id = employeer_id;
}
public String getEmployeer_name() {
return employeer_name;
}
public void setEmployeer_name(String employeer_name) {
this.employeer_name = employeer_name;
}
public Integer getEmployeer_age() {
return employeer_age;
}
public void setEmployeer_age(Integer employeer_age) {
this.employeer_age = employeer_age;
}
public String getEmployeer_department() {
return employeer_department;
}
public void setEmployeer_department(String employeer_department) {
this.employeer_department = employeer_department;
}
public String getEmployeer_worktype() {
return employeer_worktype;
}
public void setEmployeer_worktype(String employeer_worktype) {
this.employeer_worktype = employeer_worktype;
}
@Override
public String toString() {
return "Employeer [employeer_id=" + employeer_id + ", employeer_name="
+ employeer_name + ", employeer_age=" + employeer_age
+ ", employeer_department=" + employeer_department
+ ", employeer_worktype=" + employeer_worktype + "]";
}



}
    
    

Employeer.xml文件，用来放置一些映射，删除了Sql语句了

    
    
<?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.mucfc.dao.EmployeerMapper">

<!-- 定义数据库字段与实体对象的映射关系 -->
<resultMap type="Employeer" id="employeerResultMap">
<id property="employeer_id" column="employeer_id"/>
<result property="employeer_name" column="employeer_name"/>
<result property="employeer_age" column="employeer_age"/>
<result property="employeer_department" column="employeer_department"/>
<result property="employeer_worktype" column="employeer_worktype"/>
</resultMap>

</mapper>
    
    

2、配置mybatis-config.xml

    
    
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<!-- 这是根标签 -->
<configuration>
<!-- 设置别名 -->
<typeAliases>
<typeAlias alias="Employeer" type="com.mucfc.model.Employeer"/>
</typeAliases>

<!-- 配置数据源相关的信息 -->
<environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8"/>
<property name="username" value="root"/>
<property name="password" value="christmas258@"/>
</dataSource>
</environment>
</environments>

<!-- 列出映射文件 -->
<mappers>
<mapper resource="com/mucfc/model/Employeer.xml" />
</mappers>
</configuration>
    
    

3、EmployeerMapper.java在添加Sql映射语句，使用注解的方式来实现

    
    
package com.mucfc.dao;

import java.util.List;
import java.util.Map;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.ResultMap;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.SelectKey;
import org.apache.ibatis.annotations.Update;

import com.mucfc.model.Employeer;

/**
* SQL语句映射类
* @author linbingwen
* @time 2015.5.11
*/
public interface EmployeerMapper {
@Select( "select * from `t_employeer` where employeer_name like #{employeer_name}")
@ResultMap( "employeerResultMap")
public List<Employeer> findEmployeerByName(String employeer_name);

@Select( "select* from `t_employeer` where employeer_name=#{0} and employeer_department=#{1}")
@ResultMap( "employeerResultMap")

public List<Employeer> findEmployeerByNameandDep(String employeer_name,String employeer_department);
@ResultMap( "employeerResultMap")
@Select( "select* from `t_employeer` where employeer_name=#{key1} and employeer_department=#{key2}")
public List<Employeer> findEmployeerByNameandDep1(Map<String,String> map);



@Select( "select* from `t_employeer` where employeer_id =#{id}")
@ResultMap( "employeerResultMap")
public Employeer findEmployeerByID(int id);

@Insert( " insert into `t_employeer`(employeer_name,employeer_age,employeer_department,employeer_worktype) values(#{employeer_name},#{employeer_age},#{employeer_department},#{employeer_worktype})")
public void addEmployeer(Employeer employeer);

@Delete( "delete from `t_employeer` where employeer_id = #{employeer_id}")
public void deleteEmployeer(int id);

@Update( " update t_employeer set employeer_name = #{employeer_name},employeer_age= #{employeer_age},employeer_department = #{employeer_department} ,employeer_worktype=#{employeer_worktype} where employeer_id = #{employeer_id} ")
public void updateEmployeer(Employeer employeer);

}
    
    

4、测试使用

（1）单参数查找

    
    
/**
* 查找
*/
public static Employeer findEmployeerById(int id) {
SqlSession session = null;
Employeer employeer= null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeer=employeerMapper.findEmployeerByID(id);
} finally {
session.close();
}
return employeer;
}
    
    

对应SQL语句：

    
    
@Select( "select* from `t_employeer` where employeer_id =#{id}")
@ResultMap( "employeerResultMap")
public Employeer findEmployeerByID(int id);
    
    

调用：

    
    
System.out.println(findEmployeerById( 10));
System.out.println(findEmployeerById( 11));
    
    

结果：

 （2）  添加

    
    
/**
* 增加
*/
public static void addEmployeer(Employeer employeer){
SqlSession session = null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeerMapper.addEmployeer(employeer);
session.commit() ;
} finally {
session.close();
}

}
    
    

对应SQL语句：

    
    
@Insert( " insert into `t_employeer`(employeer_name,employeer_age,employeer_department,employeer_worktype) values(#{employeer_name},#{employeer_age},#{employeer_department},#{employeer_worktype})")
public void addEmployeer(Employeer employeer);

    
    

（3）更改

    
    
/**
* 更改
*/
public static void updateEmployeer(Employeer employeer){
SqlSession session = null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeerMapper.updateEmployeer(employeer);
session.commit() ;
} finally {
session.close();
}

}

    
    

对应SQL语句：

    
    
@Update( " update t_employeer set employeer_name = #{employeer_name},employeer_age= #{employeer_age},employeer_department = #{employeer_department} ,employeer_worktype=#{employeer_worktype} where employeer_id = #{employeer_id} ")
public void updateEmployeer(Employeer employeer);
    
    

（4）删除

    
    
/**
* 删除
*
*/
public static void deleteEmployeer(int id){
SqlSession session = null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeerMapper.deleteEmployeer(id);
session.commit() ;
} finally {
session.close();
}
}
    
    

对应SQL语句：

    
    
@Delete( "delete from `t_employeer` where employeer_id = #{employeer_id}")
public void deleteEmployeer(int id);
    
    

（5）列表查询

    
    
/**
* 单参数查询列表
*/
public static List<Employeer> getEmployeerList(String employeer_name){
SqlSession session = null;
List<Employeer> employeers= null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeers = employeerMapper.findEmployeerByName(employeer_name);
session.commit() ;
} finally {
session.close();
}
return employeers;

}
/**
* 多参数查询列表
*/
public static List<Employeer> getEmployeerList(String employeer_name,String employeer_department){
SqlSession session = null;
List<Employeer> employeers= null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeers = employeerMapper.findEmployeerByNameandDep(employeer_name, employeer_department);
session.commit() ;
} finally {
session.close();
}
return employeers;

}
/**
* 多参数查询列表，使用map
*/
public static List<Employeer> getEmployeerList(Map<String, String> map){
SqlSession session = null;
List<Employeer> employeers= null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeers = employeerMapper.findEmployeerByNameandDep1(map);
session.commit() ;
} finally {
session.close();
}
return employeers;

}
    
    

对应的Sql语句

    
    
@Select( "select * from `t_employeer` where employeer_name like #{employeer_name}")
@ResultMap( "employeerResultMap")
public List<Employeer> findEmployeerByName(String employeer_name);

@Select( "select* from `t_employeer` where employeer_name=#{0} and employeer_department=#{1}")
@ResultMap( "employeerResultMap")
public List<Employeer> findEmployeerByNameandDep(String employeer_name,String employeer_department);
@ResultMap( "employeerResultMap")
@Select( "select* from `t_employeer` where employeer_name=#{key1} and employeer_department=#{key2}")
public List<Employeer> findEmployeerByNameandDep1(Map<String,String> map);


@Select( "select* from `t_employeer` where employeer_id =#{id}")
@ResultMap( "employeerResultMap")
public Employeer findEmployeerByID(int id);
    
    

测试：

    
    
System.out.println( "=========================使用单参数查询===========================");
List<Employeer> employeers=getEmployeerList( "张三");
for(Employeer employeer:employeers){
System.out.println(employeer);
}
System.out.println( "=========================使用多单参数查询===========================");
List<Employeer> employeers1=getEmployeerList( "张三", "产品二部");
for(Employeer employeer1:employeers1){
System.out.println(employeer1);
}
System.out.println( "=========================使用多单参数map方式查询===========================");
Map<String, String> map = new HashMap<String, String>();
map.put( "key1", "明明");
map.put( "key2", "财会部");
List<Employeer> employeers2=getEmployeerList(map);
for(Employeer employeer2:employeers2){
System.out.println(employeer2);
}
    
    

结果：

本文工程免费下载

      林炳文Evankaka原创作品。转自https://blog.csdn.net/Evankaka/article/details/45744243

       在【Mybatis】Mybatis入门概述及第一个Mybatis实例实现增删改查 和【Mybatis】Mybatis接口编程方式实现增删改查 演示了如何使用XML来操作Mybatis实现CRUD，但是大量的XML配置文件的编写是非常烦人的。因此Mybatis也提供了基于注解的配置方式，下面我们来演示一下使用接口加注解来实现CRUD的的例子。

本文工程免费下载

一、创建数据库、数据表

  
  
use test;
create table t_employeer(
employeer_id int not null primary key AUTO_INCREMENT ,
employeer_name varchar( 50) default null,
employeer_age int default null,
employeer_department varchar( 100) default null,
employeer_worktype varchar( 100) default null
)
  
  

二、创建工程

整个工程目录如下：

记得要导入相应的包！

1、雇员对应的类Employeer.java

  
  
package com.mucfc.model;
/**
* 雇员信息类
*@author linbingwen
*@time 2015.5.11
*/
public class Employeer {
private Integer employeer_id;
private String employeer_name;
private Integer employeer_age ;
private String employeer_department;
private String employeer_worktype;

public Employeer() {
super();
}
public Integer getEmployeer_id() {
return employeer_id;
}
public void setEmployeer_id(Integer employeer_id) {
this.employeer_id = employeer_id;
}
public String getEmployeer_name() {
return employeer_name;
}
public void setEmployeer_name(String employeer_name) {
this.employeer_name = employeer_name;
}
public Integer getEmployeer_age() {
return employeer_age;
}
public void setEmployeer_age(Integer employeer_age) {
this.employeer_age = employeer_age;
}
public String getEmployeer_department() {
return employeer_department;
}
public void setEmployeer_department(String employeer_department) {
this.employeer_department = employeer_department;
}
public String getEmployeer_worktype() {
return employeer_worktype;
}
public void setEmployeer_worktype(String employeer_worktype) {
this.employeer_worktype = employeer_worktype;
}
@Override
public String toString() {
return "Employeer [employeer_id=" + employeer_id + ", employeer_name="
+ employeer_name + ", employeer_age=" + employeer_age
+ ", employeer_department=" + employeer_department
+ ", employeer_worktype=" + employeer_worktype + "]";
}



}
  
  

Employeer.xml文件，用来放置一些映射，删除了Sql语句了

  
  
<?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.mucfc.dao.EmployeerMapper">

<!-- 定义数据库字段与实体对象的映射关系 -->
<resultMap type="Employeer" id="employeerResultMap">
<id property="employeer_id" column="employeer_id"/>
<result property="employeer_name" column="employeer_name"/>
<result property="employeer_age" column="employeer_age"/>
<result property="employeer_department" column="employeer_department"/>
<result property="employeer_worktype" column="employeer_worktype"/>
</resultMap>

</mapper>
  
  

2、配置mybatis-config.xml

  
  
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<!-- 这是根标签 -->
<configuration>
<!-- 设置别名 -->
<typeAliases>
<typeAlias alias="Employeer" type="com.mucfc.model.Employeer"/>
</typeAliases>

<!-- 配置数据源相关的信息 -->
<environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8"/>
<property name="username" value="root"/>
<property name="password" value="christmas258@"/>
</dataSource>
</environment>
</environments>

<!-- 列出映射文件 -->
<mappers>
<mapper resource="com/mucfc/model/Employeer.xml" />
</mappers>
</configuration>
  
  

3、EmployeerMapper.java在添加Sql映射语句，使用注解的方式来实现

  
  
package com.mucfc.dao;

import java.util.List;
import java.util.Map;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.ResultMap;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.SelectKey;
import org.apache.ibatis.annotations.Update;

import com.mucfc.model.Employeer;

/**
* SQL语句映射类
* @author linbingwen
* @time 2015.5.11
*/
public interface EmployeerMapper {
@Select( "select * from `t_employeer` where employeer_name like #{employeer_name}")
@ResultMap( "employeerResultMap")
public List<Employeer> findEmployeerByName(String employeer_name);

@Select( "select* from `t_employeer` where employeer_name=#{0} and employeer_department=#{1}")
@ResultMap( "employeerResultMap")

public List<Employeer> findEmployeerByNameandDep(String employeer_name,String employeer_department);
@ResultMap( "employeerResultMap")
@Select( "select* from `t_employeer` where employeer_name=#{key1} and employeer_department=#{key2}")
public List<Employeer> findEmployeerByNameandDep1(Map<String,String> map);



@Select( "select* from `t_employeer` where employeer_id =#{id}")
@ResultMap( "employeerResultMap")
public Employeer findEmployeerByID(int id);

@Insert( " insert into `t_employeer`(employeer_name,employeer_age,employeer_department,employeer_worktype) values(#{employeer_name},#{employeer_age},#{employeer_department},#{employeer_worktype})")
public void addEmployeer(Employeer employeer);

@Delete( "delete from `t_employeer` where employeer_id = #{employeer_id}")
public void deleteEmployeer(int id);

@Update( " update t_employeer set employeer_name = #{employeer_name},employeer_age= #{employeer_age},employeer_department = #{employeer_department} ,employeer_worktype=#{employeer_worktype} where employeer_id = #{employeer_id} ")
public void updateEmployeer(Employeer employeer);

}
  
  

4、测试使用

（1）单参数查找

  
  
/**
* 查找
*/
public static Employeer findEmployeerById(int id) {
SqlSession session = null;
Employeer employeer= null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeer=employeerMapper.findEmployeerByID(id);
} finally {
session.close();
}
return employeer;
}
  
  

对应SQL语句：

  
  
@Select( "select* from `t_employeer` where employeer_id =#{id}")
@ResultMap( "employeerResultMap")
public Employeer findEmployeerByID(int id);
  
  

调用：

  
  
System.out.println(findEmployeerById( 10));
System.out.println(findEmployeerById( 11));
  
  

结果：

 （2）  添加

  
  
/**
* 增加
*/
public static void addEmployeer(Employeer employeer){
SqlSession session = null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeerMapper.addEmployeer(employeer);
session.commit() ;
} finally {
session.close();
}

}
  
  

对应SQL语句：

  
  
@Insert( " insert into `t_employeer`(employeer_name,employeer_age,employeer_department,employeer_worktype) values(#{employeer_name},#{employeer_age},#{employeer_department},#{employeer_worktype})")
public void addEmployeer(Employeer employeer);

  
  

（3）更改

  
  
/**
* 更改
*/
public static void updateEmployeer(Employeer employeer){
SqlSession session = null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeerMapper.updateEmployeer(employeer);
session.commit() ;
} finally {
session.close();
}

}

  
  

对应SQL语句：

  
  
@Update( " update t_employeer set employeer_name = #{employeer_name},employeer_age= #{employeer_age},employeer_department = #{employeer_department} ,employeer_worktype=#{employeer_worktype} where employeer_id = #{employeer_id} ")
public void updateEmployeer(Employeer employeer);
  
  

（4）删除

  
  
/**
* 删除
*
*/
public static void deleteEmployeer(int id){
SqlSession session = null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeerMapper.deleteEmployeer(id);
session.commit() ;
} finally {
session.close();
}
}
  
  

对应SQL语句：

  
  
@Delete( "delete from `t_employeer` where employeer_id = #{employeer_id}")
public void deleteEmployeer(int id);
  
  

（5）列表查询

  
  
/**
* 单参数查询列表
*/
public static List<Employeer> getEmployeerList(String employeer_name){
SqlSession session = null;
List<Employeer> employeers= null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeers = employeerMapper.findEmployeerByName(employeer_name);
session.commit() ;
} finally {
session.close();
}
return employeers;

}
/**
* 多参数查询列表
*/
public static List<Employeer> getEmployeerList(String employeer_name,String employeer_department){
SqlSession session = null;
List<Employeer> employeers= null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeers = employeerMapper.findEmployeerByNameandDep(employeer_name, employeer_department);
session.commit() ;
} finally {
session.close();
}
return employeers;

}
/**
* 多参数查询列表，使用map
*/
public static List<Employeer> getEmployeerList(Map<String, String> map){
SqlSession session = null;
List<Employeer> employeers= null;
try {
session = sqlSessionFactory.openSession();
EmployeerMapper employeerMapper=session.getMapper(EmployeerMapper.class);
employeers = employeerMapper.findEmployeerByNameandDep1(map);
session.commit() ;
} finally {
session.close();
}
return employeers;

}
  
  

对应的Sql语句

  
  
@Select( "select * from `t_employeer` where employeer_name like #{employeer_name}")
@ResultMap( "employeerResultMap")
public List<Employeer> findEmployeerByName(String employeer_name);

@Select( "select* from `t_employeer` where employeer_name=#{0} and employeer_department=#{1}")
@ResultMap( "employeerResultMap")
public List<Employeer> findEmployeerByNameandDep(String employeer_name,String employeer_department);
@ResultMap( "employeerResultMap")
@Select( "select* from `t_employeer` where employeer_name=#{key1} and employeer_department=#{key2}")
public List<Employeer> findEmployeerByNameandDep1(Map<String,String> map);


@Select( "select* from `t_employeer` where employeer_id =#{id}")
@ResultMap( "employeerResultMap")
public Employeer findEmployeerByID(int id);
  
  

测试：

  
  
System.out.println( "=========================使用单参数查询===========================");
List<Employeer> employeers=getEmployeerList( "张三");
for(Employeer employeer:employeers){
System.out.println(employeer);
}
System.out.println( "=========================使用多单参数查询===========================");
List<Employeer> employeers1=getEmployeerList( "张三", "产品二部");
for(Employeer employeer1:employeers1){
System.out.println(employeer1);
}
System.out.println( "=========================使用多单参数map方式查询===========================");
Map<String, String> map = new HashMap<String, String>();
map.put( "key1", "明明");
map.put( "key2", "财会部");
List<Employeer> employeers2=getEmployeerList(map);
for(Employeer employeer2:employeers2){
System.out.println(employeer2);
}
  
  

结果：

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