Maven使用注解配置SQL映射器（@Select，@Insert，@Update，@Delete）

工程目录：

Client.java

package client;import java.io.*;
import java.util.List;
import org.apache.ibatis.io.*;
import org.apache.ibatis.session.*;
import domain.Employee;
import domain.UserMapper;public class Client {public static void main(String args[]) throws IOException {InputStream in=null;SqlSessionFactory factory=null;SqlSession sqlSession=null;try {in = Resources.getResourceAsStream("mybatis-config.xml");}catch(IOException e) {e.printStackTrace();}try {factory = new SqlSessionFactoryBuilder().build(in);sqlSession = factory.openSession();        UserMapper userMapper=sqlSession.getMapper(UserMapper.class);List<Employee> list = userMapper.findAllEmployees();//注解配置映射查询 for(Employee emp:list)System.out.println(emp.getDeptId()+" "+emp.getEmpId()+" "+emp.getName());Employee emp=new Employee();emp.setDeptId(1);emp.setEmpId(5);emp.setName("小包");System.out.println("insert "+userMapper.insertEmp(emp)+" row is affected");//注解配置映射插入Employee emp2=new Employee();emp2.setEmpId(1);emp2.setName("月牙");System.out.println("update "+userMapper.updateEmp(emp2)+" row is affected");//注解配置映射更新System.out.println("delete "+userMapper.deleteEmp(2)+" row is affected");//注解配置映射删除sqlSession.commit();}catch(Exception e) {e.printStackTrace();if(sqlSession!=null) {sqlSession.rollback();}}finally {if(sqlSession!=null) {sqlSession.close();}}}
}

Department.java

package domain;public class Department {private int deptId;private String deptName;public int getDeptId() {return deptId;}public void setDeptId(int deptId) {this.deptId = deptId;}public String getDeptName() {return deptName;}public void setDeptName(String deptName) {this.deptName = deptName;}
}

Employee.java

package domain;public class Employee {private int empId;private String name;private int deptId;public int getEmpId() {return empId;}public void setEmpId(int empId) {this.empId = empId;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getDeptId() {return deptId;}public void setDeptId(int deptId) {this.deptId = deptId;}
}

UserMapper.java(interface)

package domain;import java.util.List;import org.apache.ibatis.annotations.*;public interface UserMapper {@Select("select * from employee")public List<Employee> findAllEmployees();@Insert("insert into employee values(#{empId},#{name},#{deptId})")public int insertEmp(Employee emp);//返回受影响的行数@Update("update employee set name=#{name} where empId=#{empId}")public int updateEmp(Employee emp);@Delete("delete from employee where empId=#{empId}")public int deleteEmp(int empId);
}

UserMapper.xml

<?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="domain.UserMapper">
</mapper>

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.zlm</groupId><artifactId>Maven</artifactId><version>0.0.1-SNAPSHOT</version><dependencies><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.2.6</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.40</version></dependency><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>1.2.17</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.1</version></dependency></dependencies>
</project>

employee表

查询结果：

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Maven使用注解配置SQL映射器（@Select，@Insert，@Update，@Delete）

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