Mybatis如何使用动态语句实现批量删除(delete结合foreach)

<!-- 批量删除 -->
	<delete id="deleteMoreEmp" parameterType="int[]">
		<!-- delete from emp where empno in(7789,7790) -->
		<!-- forEach : 用来循环 collection : 用来指定循环的数据的类型 可以填的值有：array,list,map item 
			: 循环中为每个循环的数据指定一个别名 index : 循环中循环的下标 open : 开始 close : 结束 separator : 数组中元素之间的分隔符 -->
		delete from emp where empno in
		<foreach collection="array" item="arr" index="no" open="("
			separator="," close=")">
			#{arr}
		</foreach>
	</delete>

/**
	 * 批量删除
	 * 
	 * @param arr
	 * @return
	 */
	public boolean doRemoveeMore(int[] arr);

	public boolean doRemoveeMore(int[] arr) {
		SqlSession sqlSession = null;
		try {
			sqlSession = MybatisSqlSessionFactory.getMySqlSession();
			int result = sqlSession.delete("cn.sz.hcq.pojo.Emp.deleteMoreEmp",
					arr);
			sqlSession.commit();
			return result > 0 ? true : false;
		} catch (Exception e) {
			e.printStackTrace();
			sqlSession.rollback();
		} finally {
			MybatisSqlSessionFactory.closeSqlSession();
		}
		return false;
	}

package cn.sz.hcq.factory; 
import java.io.IOException;
import java.io.Reader; 
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
 
public class MybatisSqlSessionFactory {
	// 配置文件
	private static final String RESOURCE = "mybatis_cfg.xml";
	private static Reader reader = null;
	private static SqlSessionFactoryBuilder builder = null;
	private static SqlSessionFactory factory = null;
	// 可以在同一个线程范围内，共享一个对象
	private static ThreadLocal<SqlSession> threadLocal = new ThreadLocal<SqlSession>();
 
	// 静态代码块（类加载的时候执行一次）
	static {
		try {
			reader = Resources.getResourceAsReader(RESOURCE);
			builder = new SqlSessionFactoryBuilder();
			factory = builder.build(reader);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
 
	public static SqlSession getMySqlSession() {
		// 从本地线程中获取session连接
		SqlSession sqlSession = threadLocal.get();
		// 连接为空则创建连接，并将该连接添加到本地线程中去
		if (sqlSession == null) {
			if (factory == null) {
				rebuildFactory();
			}
			sqlSession = factory.openSession();
		}
		threadLocal.set(sqlSession);
		return sqlSession;
	}
 
	// 创建工厂
	public static void rebuildFactory() {
		try {
			reader = Resources.getResourceAsReader(RESOURCE);
			builder = new SqlSessionFactoryBuilder();
			factory = builder.build(reader);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
 
	// 关闭连接
	public static void closeSqlSession() {
		SqlSession sqlSession = threadLocal.get();
		if (sqlSession != null) {
			// 关闭session
			sqlSession.close();
		}
		// 同时将本地线程中置为null（防止用户再次调用时出现空的session）
		threadLocal.set(null);
	} 
}

public class Emp implements Serializable {
	private Integer empno;
	private String ename;
	private String job;
	private Integer mgr;
	private Date hiredate;
	private Double sal;
	private Double comm;
	private Integer deptno; 
	public Integer getEmpno() {
		return empno;
	}
 
	public void setEmpno(Integer empno) {
		this.empno = empno;
	}
 
	public String getEname() {
		return ename;
	}
 
	public void setEname(String ename) {
		this.ename = ename;
	}
 
	public String getJob() {
		return job;
	}
 
	public void setJob(String job) {
		this.job = job;
	}
 
	public Integer getMgr() {
		return mgr;
	}
 
	public void setMgr(Integer mgr) {
		this.mgr = mgr;
	}
 
	public Date getHiredate() {
		return hiredate;
	}
 
	public void setHiredate(Date hiredate) {
		this.hiredate = hiredate;
	}
 
	public Double getSal() {
		return sal;
	}
 
	public void setSal(Double sal) {
		this.sal = sal;
	}
 
	public Double getComm() {
		return comm;
	}
 
	public void setComm(Double comm) {
		this.comm = comm;
	}
 
	public Integer getDeptno() {
		return deptno;
	}
 
	public void setDeptno(Integer deptno) {
		this.deptno = deptno;
	} 
}

<?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="cn.sz.hcq.pojo.Emp">
	<!-- 批量删除 -->
	<delete id="deleteMoreEmp" parameterType="int[]">
		<!-- delete from emp where empno in(7789,7790) -->
		<!-- forEach : 用来循环 collection : 用来指定循环的数据的类型 可以填的值有：array,list,map item 
			: 循环中为每个循环的数据指定一个别名 index : 循环中循环的下标 open : 开始 close : 结束 separator : 数组中元素之间的分隔符 -->
		delete from emp where empno in
		<foreach collection="array" item="arr" index="no" open="("
			separator="," close=")">
			#{arr}
		</foreach>
	</delete>
</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">
<configuration>
	<!--数据源 -->
	<environments default="myconn">
		<environment id="myconn">
			<!--事务管理方式 -->
			<transactionManager type="JDBC"></transactionManager>
			<!--数据库连接参数 -->
			<dataSource type="POOLED">
				<!-- type:数据源连接的方式 ，POOLED:连接池方式， UNPOOLED: 非连接池的方式 ，JNDI：java命名与目录接口方式 -->
				<property name="driver" value="org.gjt.mm.mysql.Driver"></property>
				<property name="url" value="jdbc:mysql://localhost:3306/db"></property>
				<property name="username" value="root"></property>
				<property name="password" value="root"></property>
			</dataSource>
		</environment>
	</environments>
 
	<!-- 引入实体映射文件 -->
	<mappers>
		<mapper resource="cn/sz/hcq/pojo/Emp.xml" />
	</mappers>
	<!-- 配置的参数 -->
</configuration>

<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>cn.sz.hcq.pro</groupId>
	<artifactId>Mybatis_04</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>
	<dependencies>
		<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.2.3</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.39</version>
		</dependency>
	</dependencies>
</project>

public class Test {
	public static void main(String[] args) {
		IEmpDAO empDAO = new EmpDAOImpl();
		System.out.println("----------批量删除----------");
		int[] arr = { 7791, 7792 };//删除的主键
		boolean removeeMore = empDAO.doRemoveeMore(arr);
		System.out.println("批量删除的结果：" + removeeMore);
	}
}