林炳文Evankaka原创作品。转载请注明出处http://blog.csdn.net/evankaka
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。
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 )
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>
<?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>
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();
}
} @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： 林炳文Evankaka原创作品。转载请注明出处http://blog.csdn.net/evankaka
原文地址：http://blog.csdn.net/evankaka/article/details/45744243
