customerdaoimpl.java

简单的struts框架的应用 实现对数据库的增删改查

package com.lc.zyz.model.persistence.impl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import com.lc.zyz.model.domain.CustomerInfo;
import com.lc.zyz.model.persistence.dao.CustomerDao;


public class CustomerDaoImpl implements CustomerDao {

	CustomerInfo ci=null;
	Connection conn=null;
	PreparedStatement ps=null;
	boolean result=false;
	
	
	public boolean addCustomer(CustomerInfo ci){
		try{
			conn=DBConn.getConn();
			ps=conn.prepareStatement("insert into customers values (?,?,?,?,?)");
			ps.setString(1, ci.getCusId());
			ps.setString(2, ci.getCusName());
			ps.setString(3, ci.getCusSex());
			ps.setInt(4, ci.getCusAge());
			ps.setString(5, ci.getCusIdCard());
			if(ps.executeUpdate()!=0)
			{
				result=true;
			}
			else
			{
				result=false;
			}
		}
		catch(SQLException e){
			e.printStackTrace();
		}
		
		return result;
	}//end method addCustomer

	public boolean deleteCustomer(String cusId) throws Exception {
		try{
			conn=DBConn.getConn();
			ps=conn.prepareStatement("delete from customers where cusId=?");
			ps.setString(1, cusId);
			
			if(ps.executeUpdate()!=0)
			{
				result=true;
			}
			else
			{
				result=false;
			}
		}
		catch(SQLException e){
			e.printStackTrace();
		}
		
		return result;
	}//end method deleteCustomer
	
	public boolean updateCustomer(CustomerInfo ci) throws Exception {
		try{
			conn=DBConn.getConn();
			ps=conn.prepareStatement("update customers set cusName=?,cusSex=?,cusAge=?,cusIdCard=? where cusId=?");

			ps.setString(1, ci.getCusName());
			ps.setString(2, ci.getCusSex());
			ps.setInt(3, ci.getCusAge());
			ps.setString(4, ci.getCusIdCard());
			ps.setString(5, ci.getCusId());
			
			if(ps.executeUpdate()!=0)
			{
				result=true;
			}
			else
			{
				result=false;
			}
		}
		catch(SQLException e){
			e.printStackTrace();
		}
		
		return result;
	}//end method updateCustomer

	public CustomerInfo getCustomerById(String cusId) throws Exception {
		try{
			ci=new CustomerInfo();
			conn=DBConn.getConn();
			ps=conn.prepareStatement("select * from customers where cusId=?");
			ps.setString(1, cusId);
			
			ResultSet rs=ps.executeQuery();
			if(null!=rs)
			{
				while(rs.next())
				{
					ci.setCusId(rs.getString(1));
					ci.setCusName(rs.getString(2));
					ci.setCusSex(rs.getString(3));
					ci.setCusAge(rs.getInt(4));
					ci.setCusIdCard(rs.getString(5));
				}
			}
			
		}
		catch(SQLException e){
			e.printStackTrace();
		}
		
		return ci;
	}//end method getCustomerById
	
	public Iterator getAllCustomer() throws Exception {
		List list=null;
		try{
			ci=new CustomerInfo();
			conn=DBConn.getConn();
			ps=conn.prepareStatement("select * from customers");
			
			ResultSet rs=ps.executeQuery();
			list=new ArrayList();
			if(null!=rs)
			{
				while(rs.next())
				{
					list.add(rs.getString(1));
					list.add(rs.getString(2));
					list.add(rs.getString(3));
					list.add(Integer.valueOf(rs.getInt(4)));
					list.add(rs.getString(5));
				}
			}
			
		}
		catch(SQLException e){
			e.printStackTrace();
		}
		
		return list.iterator();
	}//end method getAllCustomer

	

	

}