springjdbc-NamedParameterJdbcTemplate处理in查询

package com.test;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.namedparam.BeanPropertySqlParameterSource;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;

import com.java.common.util.BeanFactory;
import com.java.ssmb.entity.domain.UserInfo;
/**
 * 使用NamedParameterJdbcTemplate查询条件sql中in查询和javabean查询
 * 一般spring项目中都存在JdbcTemplate，
 * 例子使用JdbcTemplate创建NamedParameterJdbcTemplate
 * 
 * @author yeshun
 *
 */
public class NamedParameterJdbcTemplateTest {

	private NamedParameterJdbcTemplate namedJdbcTemplate;
	
	public NamedParameterJdbcTemplateTest(){
		JdbcTemplate jdbcTemplate = BeanFactory.getBean("jdbcTemplate",JdbcTemplate.class);
		this.namedJdbcTemplate = new NamedParameterJdbcTemplate(jdbcTemplate);
	}
	
	/*
	 * 使用map查询
	 */
	public void queryListByMap(List<String> userids){
		String sql = "select * from user_table u where u.user_id in (:userids )";
		
		Map<String,Object> parameters = new HashMap<String,Object>();
		parameters.put("userids", userids);
		
		List<Map<String,Object>> list = namedJdbcTemplate.queryForList(sql, parameters);
		
		for (Map<String, Object> map : list) {
			System.out.println("-------------------");
			System.out.println(map.get("user_id"));
			System.out.println(map.get("user_name"));
		}
	}
	
	/*
	 * 使用MapSqlParameterSource查询
	 */
	public void queryListByMapSqlParameterSource(List<String> userids){
		String sql = "select * from user_table u where u.user_id in (:userids )";
		
		MapSqlParameterSource parameters = new MapSqlParameterSource();
		parameters.addValue("userids", userids);
		
		List<Map<String,Object>> list = namedJdbcTemplate.queryForList(sql, parameters);
		
		for (Map<String, Object> map : list) {
			System.out.println("-------------------");
			System.out.println(map.get("user_id"));
			System.out.println(map.get("user_name"));
		}
	}
	
	/*
	 * 使用BeanPropertySqlParameterSource查询，javabean查询
	 */
	public void querySingleByBeanPropertySqlParameterSource(){
		//:userId -- 对应UserInfo.userId
		String sql = "select * from user_table u where u.user_id = :userId ";
		
		UserInfo user = new UserInfo();
		user.setUserId("user0");
		BeanPropertySqlParameterSource parameters = new BeanPropertySqlParameterSource(user);
		
		Map<String,Object> map = namedJdbcTemplate.queryForMap(sql, parameters);
		
		System.out.println(map.get("user_id"));
		System.out.println(map.get("user_name"));
		
	}
	
	/*
	 * 查询单个返回值
	 */
	public void querySingle(List<String> userids){
		String sql = "select count(*) from user_table u where u.user_id in (:userids )";
		MapSqlParameterSource parameters = new MapSqlParameterSource();
		parameters.addValue("userids", userids);
		
		Integer count = namedJdbcTemplate.queryForObject(sql, parameters, Integer.class);
		// queryForInt 
//		Integer count = namedJdbcTemplate.queryForInt(sql, parameters);
		System.out.println(count);
	}
	
	/*
	 * 使用MapSqlParameterSource查询,使用RowMapper返回
	 */
	public void queryUsersByMapSqlParameterSource(List<String> userids){
		String sql = "select * from user_table u where u.user_id in (:userids )";
		
		MapSqlParameterSource parameters = new MapSqlParameterSource();
		parameters.addValue("userids", userids);
		
		List<UserInfo> userList = namedJdbcTemplate.query(sql, parameters,new RowMapper<UserInfo>(){

			@Override
			public UserInfo mapRow(ResultSet rs, int rowNum) throws SQLException {
				// TODO Auto-generated method stub
				UserInfo user = new UserInfo();
				user.setUserId(rs.getString("user_id"));
				user.setUserName(rs.getString("user_name"));
				user.setPassword(rs.getString("password"));
				return user;
			}
		});
		
		for (UserInfo userInfo : userList) {
			System.out.println(userInfo.getUserId()+"--"+userInfo.getUserName());
		}
	}
	
	public static void main(String[] args) {
		NamedParameterJdbcTemplateTest test = new NamedParameterJdbcTemplateTest();
		List<String> userids= new ArrayList<String>();
		userids.add("user0");
		userids.add("user1");
		userids.add("user2");
		userids.add("user3");
		
//		test.queryListByMap(userids);
//		test.queryListByMapSqlParameterSource(userids);
//		test.querySingle(userids);
//		test.querySingleByBeanPropertySqlParameterSource();
		test.queryUsersByMapSqlParameterSource(userids);
	}
}

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