33、Mybatis进阶：MyBatis调用带游标的存储过程

本文内容来自尚硅谷http://www.gulixueyuan.com/course/43/task/1235/show的任务86与任务85

1创建JUnit

	
	/**
	 * oracle分页：
	 * 		借助rownum：行号；子查询；
	 * 存储过程包装分页逻辑
	 * @throws IOException 
	 */
	@Test
	public void testProcedure() throws IOException{
		SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();
		SqlSession openSession = sqlSessionFactory.openSession();
		try{
			EmployeeMapper mapper = openSession.getMapper(EmployeeMapper.class);
			OraclePage page = new OraclePage();
			page.setStart(1);
			page.setEnd(5);
			mapper.getPageByProcedure(page);
			
			System.out.println("总记录数："+page.getCount());
			System.out.println("查出的数据："+page.getEmps().size());
			System.out.println("查出的数据："+page.getEmps());
		}finally{
			openSession.close();
		}
		
	}
	

2dao

package com.atguigu.mybatis.dao;

import java.util.List;

import com.atguigu.mybatis.bean.Employee;
import com.atguigu.mybatis.bean.OraclePage;

public interface EmployeeMapper {
	
	public Employee getEmpById(Integer id);
	
	public List<Employee> getEmps();
	
	public Long addEmp(Employee employee);
	
	public void getPageByProcedure(OraclePage page);
}

3bean

package com.atguigu.mybatis.bean;

import java.util.List;

/**
 * 封装分页查询数据
 * @author lfy
 *
 */
public class OraclePage {
	
	private int start;
	private int end;
	private int count;
	private List<Employee> emps;
	
	public int getStart() {
		return start;
	}
	public void setStart(int start) {
		this.start = start;
	}
	public int getEnd() {
		return end;
	}
	public void setEnd(int end) {
		this.end = end;
	}
	public int getCount() {
		return count;
	}
	public void setCount(int count) {
		this.count = count;
	}
	public List<Employee> getEmps() {
		return emps;
	}
	public void setEmps(List<Employee> emps) {
		this.emps = emps;
	}
	
	

}

4xml

#{emps,mode=OUT,jdbcType=CURSOR,javaType=ResultSet,resultMap=PageEmp}中mode代表在存储过程中的参数类型为输出参数，jdbcType：代表着是游标类型，javaType:设置返回的结果集类型为ResultSet，resultMap：结果集的映射关系处理

	<!-- public void getPageByProcedure();
	1、使用select标签定义调用存储过程
	2、statementType="CALLABLE":表示要调用存储过程
	3、{call procedure_name(params)}
	-->
	<select id="getPageByProcedure" statementType="CALLABLE" databaseId="oracle">
		{call hello_test(
			#{start,mode=IN,jdbcType=INTEGER},
			#{end,mode=IN,jdbcType=INTEGER},
			#{count,mode=OUT,jdbcType=INTEGER},
			#{emps,mode=OUT,jdbcType=CURSOR,javaType=ResultSet,resultMap=PageEmp}
		)}
	</select>
	<resultMap type="com.atguigu.mybatis.bean.Employee" id="PageEmp">
		<id column="EMPLOYEE_ID" property="id"/>
		<result column="LAST_NAME" property="email"/>
		<result column="EMAIL" property="email"/>
	</resultMap>

5oracle中创建带游标的存储过程

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