JDBC 연습문제-Dao 연습

VO: Person 클래스

package com.test.vo;

import java.util.Date;
/**
 *   person      
 * @author dingshuangen
 *
 */
public class Person {

	private Integer personId;
	private String personName;
	private String degree;
	private Date birth;
	private Integer sal;
	public Integer getPersonId() {
		return personId;
	}
	public void setPersonId(Integer personId) {
		this.personId = personId;
	}
	public String getPersonName() {
		return personName;
	}
	public void setPersonName(String personName) {
		this.personName = personName;
	}
	public String getDegree() {
		return degree;
	}
	public void setDegree(String degree) {
		this.degree = degree;
	}
	public Date getBirth() {
		return birth;
	}
	public void setBirth(Date birth) {
		this.birth = birth;
	}
	public Integer getSal() {
		return sal;
	}
	public void setSal(Integer sal) {
		this.sal = sal;
	}
	public Person() {
		super();
	}
	public Person(String personName, String degree, Date birth, Integer sal) {
		super();
		this.personName = personName;
		this.degree = degree;
		this.birth = birth;
		this.sal = sal;
	}
	@Override
	public String toString() {
		return "Person [personId=" + personId + ", personName=" + personName + ", degree=" + degree + ", birth=" + birth
				+ ", sal=" + sal + "]";
	}
	
	
	
}

BaseDao 클래스

package com.test.dao;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
 *          
 * @author dingshuangen
 *
 */
public class BaseDao {
	/**
	 *     
	 * @return
	 */
	public  Connection getConnection() {
		Connection conn=null;
		try {
		conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/jdbc","root","0325");
		return conn;
		}catch(Exception e) {
			e.printStackTrace();
		}
		return conn;
	}
	
	/**
	 *     AutoCloseable     
	 * @param auto
	 */
	public  void close(AutoCloseable auto) {
		if(auto!=null) {
			try {
				auto.close();
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	/**
	 *      sql     sql  
	 * @param sql
	 * @param objs  
	 */
	public void executeSql(String sql,Object...objs) {
		Connection conn=this.getConnection();
		PreparedStatement ps=null;
		try {
			ps=conn.prepareStatement(sql);
			// sql    ？         
			for(int i=0;i> executQuery(String sql,Object...objs){
		
		List> list=new ArrayList>();
		Connection conn=null;
		PreparedStatement ps=null;
		ResultSet rs=null;
		try {
			//    
			conn=this.getConnection();
			//    
			ps=conn.prepareStatement(sql);
			//    
			for(int i=0;i map=new HashMap();
				for(int i=1;i<=rsmd.getColumnCount();i++) {
					//      map 
					map.put(rsmd.getColumnLabel(i), rs.getObject(i));
				}
				// map   list 
				list.add(map);
			}
			return list;
		}catch(Exception e) {
			e.printStackTrace();
		}finally {
			
			this.close(rs);
			this.close(ps);
			this.close(conn);
			
		}
		return list;
		
	}
	

}

Dao 커넥터:

package com.test.dao;

import java.util.List;

import com.test.vo.Person;

public interface PersonDao {

	/**
	 *       
	 * @param person：        
	 */
	public void insert(Person person);
	
	/**
	 *       ：
	 * @param person：        ，           ，          
	 */
	public void update(Person person);
	
	/**
	 *             
	 * @param ids：          
	 */
	public void delete(int[] ids);
	
	/**
	 *        ，          List 
	 * @return :         
	 */
	public List getAll();
	
	/**
	 *         
	 * @param pagesize：       
	 * @param pageOrder：  （    ）
	 * @return
	*/
	public List getPersonForPage(int pagesize,int pageOrder);
	/**
	 *       ，           
	 * @return
	 */
	public Person getPersonById(int id)	;
}

Dao 인터페이스의 구현 클래스:

package com.test.dao;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;

import com.test.vo.Person;

public class PersonDaoImpl extends BaseDao implements PersonDao {

	@Override
	public void insert(Person person) {
		
		this.executeSql("insert into Person values(null,?,?,?,?)", person.getPersonName(),person.getDegree(),person.getBirth(),person.getSal());
	}

	@Override
	public void update(Person person) {
		
		this.executeSql("update person set personname=?,degree=?,birth=?,sal=? where personid=?",  person.getPersonName(),person.getDegree(),person.getBirth(),person.getSal(),person.getPersonId());
	}

	@Override
	public void delete(int[] ids) {

		for(int i=0;i getAll() {
		List> l=this.executQuery("select * from person order by personid");
		return this.convert(l);
	}

	@Override
	public List getPersonForPage(int pagesize, int pageOrder) {
		return this.convert(this.executQuery("select * from person limit ?,? ", (pageOrder-1)*pagesize,pagesize));
	}

	@Override
	public Person getPersonById(int id) {
		Person p=null;
		List list= this.convert(this.executQuery("select * from person where personid=?", id));
		if(list!=null) {
			p=list.get(0);
		}
		return p;
	}
	/**
	 *     ， List>   List
	 * @param l          
	 * @return
	 */
	private List convert(List> l){
		List list=new ArrayList();
		for (Map map : l) {
			Person p=new Person();
			//           Person 
			p.setPersonId((Integer)map.get("personid"));
			p.setPersonName((String)map.get("personname"));
			p.setBirth((Date)map.get("birth"));
			p.setDegree((String)map.get("degree"));
			p.setSal((Integer)map.get("sal"));
			list.add(p);
		}
		return list;
	}

}

테스트 방법:

package com.test.test;

import java.sql.Date;

import com.test.dao.PersonDao;
import com.test.dao.PersonDaoImpl;
import com.test.vo.Person;

public class PersonDaoTest {

	public static void main(String[] args) {
		
		PersonDao dao=new PersonDaoImpl();
		System.out.println("       ：
"+dao.getAll());
		System.out.println("-------------------------------------------------");
		Date d=Date.valueOf("1997-02-20");
		dao.insert(new Person("  ","  ",d,5820));
		System.out.println("-------------------------------------------------");
		dao.insert(new Person("  ","  ",Date.valueOf("1998-03-18"),9852));
		System.out.println("-------------------------------------------------");
		System.out.println("        ：
"+dao.getAll());
		System.out.println("-------------------------------------------------");
		System.out.println("  id  ：
"+dao.getPersonById(2));
		System.out.println("-------------------------------------------------");
		System.out.println("    ：");
		Person p=new Person("  ","  ",Date.valueOf("2000-8-9"),6300);
		p.setPersonId(2);
		dao.update(p);
		System.out.println("  id  ：
"+dao.getPersonById(2));
		System.out.println("-------------------------------------------------");
		System.out.println("    ：");
		System.out.println(dao.getPersonForPage(5, 2));
		System.out.println("-------------------------------------------------");
		System.out.println("      ：");
		dao.delete(new int[]{1,2,3});
		System.out.println("-------------------------------------------------");
		System.out.println("          ：
"+dao.getAll());
		System.out.println("-------------------------------------------------");
		
	}

}

실행 테스트 방법 결과:

       ：
[Person [personId=1, personName=gggg, degree=  , birth=1996-03-15, sal=9690]
, Person [personId=2, personName=hhhh, degree=  , birth=1989-03-26, sal=8900]
, Person [personId=3, personName=iiii, degree=  , birth=1990-06-08, sal=7800]
, Person [personId=4, personName=XIAO, degree=SS, birth=1997-08-09, sal=5800]
, Person [personId=5, personName=  , degree=  , birth=1998-03-18, sal=9852]
, Person [personId=6, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=7, personName=  , degree=  , birth=1998-08-09, sal=6000]
, Person [personId=8, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=9, personName=  , degree=  , birth=1998-03-18, sal=9852]
, Person [personId=10, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=11, personName=  , degree=  , birth=1998-03-18, sal=9852]
]
-------------------------------------------------
*****  ( insert into Person values(null,?,?,?,?) )  *****
-------------------------------------------------
*****  ( insert into Person values(null,?,?,?,?) )  *****
-------------------------------------------------
        ：
[Person [personId=1, personName=gggg, degree=  , birth=1996-03-15, sal=9690]
, Person [personId=2, personName=hhhh, degree=  , birth=1989-03-26, sal=8900]
, Person [personId=3, personName=iiii, degree=  , birth=1990-06-08, sal=7800]
, Person [personId=4, personName=XIAO, degree=SS, birth=1997-08-09, sal=5800]
, Person [personId=5, personName=  , degree=  , birth=1998-03-18, sal=9852]
, Person [personId=6, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=7, personName=  , degree=  , birth=1998-08-09, sal=6000]
, Person [personId=8, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=9, personName=  , degree=  , birth=1998-03-18, sal=9852]
, Person [personId=10, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=11, personName=  , degree=  , birth=1998-03-18, sal=9852]
, Person [personId=15, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=16, personName=  , degree=  , birth=1998-03-18, sal=9852]
]
-------------------------------------------------
  id  ：
Person [personId=2, personName=hhhh, degree=  , birth=1989-03-26, sal=8900]

-------------------------------------------------
    ：
*****  ( update person set personname=?,degree=?,birth=?,sal=? where personid=? )  *****
  id  ：
Person [personId=2, personName=  , degree=  , birth=2000-08-09, sal=6300]

-------------------------------------------------
    ：
[Person [personId=6, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=7, personName=  , degree=  , birth=1998-08-09, sal=6000]
, Person [personId=8, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=9, personName=  , degree=  , birth=1998-03-18, sal=9852]
, Person [personId=10, personName=  , degree=  , birth=1997-02-20, sal=5820]
]
-------------------------------------------------
      ：
*****  ( delete from person where personid=? )  *****
*****  ( delete from person where personid=? )  *****
*****  ( delete from person where personid=? )  *****
-------------------------------------------------
          ：
[Person [personId=4, personName=XIAO, degree=SS, birth=1997-08-09, sal=5800]
, Person [personId=5, personName=  , degree=  , birth=1998-03-18, sal=9852]
, Person [personId=6, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=7, personName=  , degree=  , birth=1998-08-09, sal=6000]
, Person [personId=8, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=9, personName=  , degree=  , birth=1998-03-18, sal=9852]
, Person [personId=10, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=11, personName=  , degree=  , birth=1998-03-18, sal=9852]
, Person [personId=15, personName=  , degree=  , birth=1997-02-20, sal=5820]
, Person [personId=16, personName=  , degree=  , birth=1998-03-18, sal=9852]
]
-------------------------------------------------

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