JDBC connection to Oracle database and list Traversal

I haven't written any code about database connection for a long time, so I can't even do it. I posted a record.

Database-related object classes:

package com.lliu.JDBC;public class AAA {public AAA(){}public AAA(int ID, String name, String dept){this.setID(ID);this.setName(name);this.setDept(dept);}public int ID;public String name;public String dept;public int getID() {return ID;}public void setID(int iD) {ID = iD;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getDept() {return dept;}public void setDept(String dept) {this.dept = dept;}}

Connect to the database and traverse the items:

package com.lliu.JDBC;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.Iterator;import java.util.List;public class JDBCConnection {public static void main(String[] args){Connection conn = null;PreparedStatement stmt = null;ResultSet rs = null;List<AAA> list =new ArrayList<AAA>();AAA a = new AAA();try{Class.forName("oracle.jdbc.driver.OracleDriver");conn = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:xe", "system", "12345");stmt = conn.prepareStatement("select ID,NAME,DEPT from AAA");rs = stmt.executeQuery();while(rs.next()){list.add(new AAA(rs.getInt(1),rs.getString(2),rs.getString(3)));System.out.println(rs.getString(2));}}catch(Exception e){e.printStackTrace();}finally{if(rs != null){try {rs.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}if(stmt != null){try {stmt.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}if(conn != null){try {conn.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}Iterator<AAA> it = list.iterator();while(it.hasNext()){System.out.println(it.next().ID);}}}

More than enough. Make progress every day. Come on ~~~