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?這是個音樂播放列表
1、queryMusic.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <%@ taglib prefix="s" uri="/struts-tags" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head><base href="<%=basePath%>"><title>Music List</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body><table border="1" cellpadding="0" cellspacing="0" width="700" height="300"><tr height="200"><td align="center">序號</td><td align="center">歌曲名</td><td align="center">歌手名</td><td align="center">歌曲大小</td><td align="center">試聽</td><td align="center">下載</td><td align="center">操作</td></tr><s:iterator var="music" value="musicList" status="no"><tr><td align="center">${no.count}</td><td align="center">${music.musicName}</td><td align="center">${music.singer}</td><td align="center">${music.size}</td><td align="center"><img src="image/st.png" /></td><td align="center"><img src="image/xz.png" /></td><td align="center"><a href="#">刪除</a></td></tr></s:iterator></table></body> </html>
2、Music.java
package com.cn.pojo;public class Music {private String musicName;private String singer;private String size;public String getMusicName() {return musicName;}public void setMusicName(String musicName) {this.musicName = musicName;}public String getSinger() {return singer;}public void setSinger(String singer) {this.singer = singer;}public String getSize() {return size;}public void setSize(String size) {this.size = size;}public Music() {super();}public Music(String musicName, String singer, String size) {super();this.musicName = musicName;this.singer = singer;this.size = size;}}
3、DBHelper.java
package com.cn.tools;import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.Statement;/*** 獲取數據庫操作的連接對象* 關閉數據庫操作的各種資源* @author 晏先政**/ public class DBHelper {private static final String className = "com.mysql.jdbc.Driver";private static final String url = "jdbc:mysql://localhost:3306/tlx?characterEncoding=utf8&useSSL=true";private static final String uname = "root";private static final String upass = "211599100yxz";/*** 獲取數據庫連接對象的方法*/public static Connection getConn(){Connection conn = null;try{Class.forName(className);conn = DriverManager.getConnection(url,uname, upass);} catch(Exception e){e.printStackTrace();}return conn;}/*** 關閉數據庫連接對象*/public static void closeConn(Connection conn){try{if(conn!=null){conn.close();}} catch(Exception e){e.printStackTrace();}}/*** 關閉數據庫操作對象*/public static void closeStmt(Statement stmt){try{if(stmt!=null){stmt.close();}} catch(Exception e){e.printStackTrace();}}/*** 關閉數據庫操作對象*/public static void closePstmt(PreparedStatement pstmt){try{if(pstmt!=null){pstmt.close();}} catch(Exception e){e.printStackTrace();}}/*** 關閉數據庫操作對象*/public static void closeRs(ResultSet rs){try{if(rs!=null){rs.close();}} catch(Exception e){e.printStackTrace();}} }
4、MusicDao.java
package com.cn.dao;import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.util.ArrayList; import java.util.List; import java.util.Map;import javax.servlet.jsp.jstl.sql.Result; import javax.servlet.jsp.jstl.sql.ResultSupport;import com.cn.pojo.Music; import com.cn.tools.DBHelper;public class MusicDao {private Connection conn = null;private PreparedStatement pstmt = null;private ResultSet rs = null;public void addMusic(Music music){try {conn = DBHelper.getConn();String sql = "insert into music_info(musicName,singer,size) values(?,?,?)";PreparedStatement pstmt = conn.prepareStatement(sql);pstmt.setString(1, music.getMusicName());pstmt.setString(2, music.getSinger());pstmt.setString(3, music.getSize());pstmt.execute();} catch (Exception e) {e.printStackTrace();}finally{DBHelper.closePstmt(pstmt);DBHelper.closeConn(conn);}}public List<Music> queryMusic() {List<Music> musicList = new ArrayList<Music>(); // Music music = new Music();try {conn = DBHelper.getConn();String sql = "select * from music_info";pstmt = conn.prepareStatement(sql);rs = pstmt.executeQuery();Result rst = ResultSupport.toResult(rs);Map[] rows = rst.getRows();for(Map row:rows){String musicName = row.get("musicName").toString();String singer = row.get("singer").toString();String size = row.get("size").toString();Music music = new Music(musicName,singer,size);musicList.add(music);System.out.println(musicList);} } catch (Exception e) {e.printStackTrace();}finally{DBHelper.closeRs(rs);DBHelper.closePstmt(pstmt);DBHelper.closeConn(conn);}return musicList;}public void deleteMusic(){}public void updateMusic(Music music) {// TODO Auto-generated method stub } }
5、MusicManagerAction.java
package com.cn.action;import java.util.List;import com.cn.dao.MusicDao; import com.cn.pojo.Music;public class MusicManagerAction {private List<Music> musicList;private MusicDao musicDao = new MusicDao();private Music music;public String queryMusic(){musicList = musicDao.queryMusic();System.out.println(musicList);return "queryMusic";}public String deleteMusic(){musicDao.deleteMusic();musicList = musicDao.queryMusic();return "deletemusic";}public String addMusic(){musicDao.addMusic(music);return "addMusic";}public String updateMusic(){musicDao.updateMusic(music);return "updatemusic";}public List<Music> getMusicList() {return musicList;}public void setMusicList(List<Music> musicList) {this.musicList = musicList;}}
6、struts.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN""http://struts.apache.org/dtds/struts-2.3.dtd"><struts><constant name="struts.action.extension" value="do"></constant><!-- 實現對動態調用的支持 --><constant name="struts.enable.DynamicMethodInvocation" value="true"></constant><package name="test" namespace="/" extends="struts-default"><action name="labelAction_*" class="com.cn.action.LabelAction" method="{1}"><result name="{1}">/{1}.jsp</result></action><action name="MusicManagerAction" class="com.cn.action.MusicManagerAction"><result name="queryMusic">/queryMusic.jsp</result><result name="deleteMusic">/queryMusic.jsp</result><result name="addMusic" type="redirectAction"><param name="actionName">MusicManagerAction</param><param name="method">queryMusic</param></result><result name="updateMusic" type="redirectAction"><param name="actionName">MusicManagerAction</param><param name="method">queryMusic</param></result></action><action name="UserManagerAction_*" class="com.cn.action.UserManagerAction" method="{1}"><result name="{1}">/register.jsp</result></action></package></struts>
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轉載于:https://www.cnblogs.com/Vito-Yan/p/7429497.html
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