#6 提交实验代码

jweb/src/edu/hzu/javaweb/labs/Se1414080902101/JdbcConnect.java

@@ -0,0 +1,75 @@
+package edu.hzu.javaweb.labs.se1414080902101;
+
+import java.sql.Connection;
+ import java.sql.DriverManager;
+ import java.sql.PreparedStatement;
+ import java.sql.ResultSet;
+ import java.sql.SQLException;
+ import java.util.ArrayList;
+ import java.util.List;
+
+ public class JdbcConnect {
+ 	private static String url = "jdbc:mysql:///javaweb";  
+     private static String className = "com.mysql.jdbc.Driver";  
+     private static String user = "root";  
+     private static String password = "root";
+
+     private static Connection connect = null;
+     private static PreparedStatement statement = null;
+     private static ResultSet rs = null;
+
+     public static Connection getConnection(){
+     	if(connect != null)
+     		return connect;
+     	try {
+ 			Class.forName(className);
+ 			connect = DriverManager.getConnection(url,user,password);
+ 		} catch (ClassNotFoundException e) {
+ 			// TODO Auto-generated catch block
+ 			e.printStackTrace();
+ 		} catch (SQLException e) {
+ 			// TODO Auto-generated catch block
+ 			e.printStackTrace();
+ 		}
+ 		return connect;
+     }
+
+     public static void closeConnection(){
+     	try {
+ 			connect.close();
+ 			statement.close();
+ 			rs.close();
+ 		} catch (SQLException e) {
+ 			// TODO Auto-generated catch block
+ 			e.printStackTrace();
+ 		}
+     }
+
+     public List<Userinfo> getUserinfo(){
+     	List<Userinfo> userinfos = new ArrayList();
+     	Userinfo userinfo = null;
+     	String sql = "select * from userinfo;";
+     	try {
+     		connect = getConnection();
+ 			statement = (PreparedStatement) connect.prepareStatement(sql);
+ 	    	rs = statement.executeQuery();
+ 	    	if(rs != null){
+ 	    		while(rs.next()){
+ 	    			String id = rs.getString(0);
+ 	    			String name = rs.getString(1);
+ 	    			String date = rs.getString(2);
+ 	    			boolean sex = rs.getBoolean(3);
+ 	    			int age = rs.getInt(4);
+ 	    			userinfo = new Userinfo(id,name,date,sex,age);
+ 	    			userinfo.add(userinfo);
+ 	    		}
+ 	    	}
+ 		} catch (SQLException e) {
+ 			e.printStackTrace();
+ 		}finally{
+ 			closeConnection();
+ 		}
+     	return userinfos;
+     }
+
+ }