必须的jar：
java bean:
package upload.progress.action; public class music { private String name; private String singer; private String source; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSinger() { return singer; } public void setSinger(String singer) { this.singer = singer; } public String getSource() { return source; } public void setSource(String source) { this.source = source; } }
struts2.xml配置：
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <!-- <constant name="struts.enable.DynamicMethodInvocation" value="false" /> <constant name="struts.devMode" value="false" /> <include file="example.xml"/> <package name="default" namespace="/" extends="struts-default"> <default-action-ref name="index" /> <action name="index"> <result type="redirectAction"> <param name="actionName">HelloWorld</param> <param name="namespace">/example</param> </result> </action> </package> --> <package name="default" namespace="/Fileupload" extends="struts-default"> <action name="practice" class="action.PracticeAction" method="practice_one"> <result type="redirect" name="success"> /js/uploadify.jsp </result> </action> </package> <!-- Add packages here --> <package name="ajax" namespace="/ajax" extends="json-default"> <action name="ajaxTest1" class="action.ajaxTest1" method="ajaxTest"> <result type="stream"> <param name="contentType">text/html</param> <param name="inputName">inputStream</param> </result> </action> <action name="json" class="upload.progress.action.jsonTest1" method="returnMessage"> <result name="success" type="json"></result> </action> <action name="jsonMusic" class="upload.progress.action.jsonTest1" method="returnMusic"> <result name="success" type="json"></result> </action> <action name="jsonMusicList" class="upload.progress.action.jsonTest1" method="returnMusicList"> <result name="success" type="json"> <param name="root">musicList</param> </result> </action> </package> </struts>
jsp页面：
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%> <% 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>My JSP 'jsonTest1.jsp' starting page</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"> --> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script type="text/javascript"> $(function(){ $("#showMessage").click(function(){ $.ajax({ type: "POST", dataType: "json", url: "ajax/json.action", success: function(data){ $("#message").html("<font color='red'>"+data.message+"</font>"); } }); }); $("#showMusic").click(function(){ $.ajax({ type : "POST", dataType : "json", url : "ajax/jsonMusic.action", success : function(data){ $.each(data,function(i,item){ if(item!=null){ alert(item.name); } }) } }); }); $("#showList").click(function(){ $.ajax({ type : "POST", dataType : "json", url : "ajax/jsonMusicList.action", success : function(data){ $.each(data,function(i,item){ if(item!=null){ alert(item.name); } }) } }); }); }); </script> </head> <body> <table align="center"> <tr> <td id="showMessage">Message</td> <td id="showMusic">showMusic</td> <td id="showList">showList</td> </tr> </table> <div id="message"></div> </body> </html>
action：
package upload.progress.action; import java.util.ArrayList; import java.util.List; import org.json.JSONArray; import com.opensymphony.xwork2.ActionSupport; public class jsonTest1 extends ActionSupport { /** * 处理json的action */ private static final long serialVersionUID = -1519192049194890338L; private String message; private music Music; private List<music> musicList; public String returnMessage(){ System.out.println("json invoking"); message="json 字符串"; return SUCCESS; } public String returnMusic(){ Music =new music(); Music.setName("忘情水"); Music.setSinger("刘德华"); Music.setSource("百度"); return SUCCESS; } public String returnMusicList(){ musicList=new ArrayList<music>(); music Music1 =new music(); Music1.setName("忘情水1"); Music1.setSinger("刘德华1"); Music1.setSource("百度1"); music Music2 =new music(); Music2.setName("忘情水2"); Music2.setSinger("刘德华2"); Music2.setSource("百度2"); music Music3 =new music(); Music3.setName("忘情水3"); Music3.setSinger("刘德华3"); Music3.setSource("百度3"); musicList.add(Music1); musicList.add(Music2); musicList.add(Music3); return SUCCESS; } public String jsonArray(){ List<String> list=new ArrayList<String>(); JSONArray jsonArray=new JSONArray(list); return SUCCESS; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } public music getMusic() { return Music; } public void setMusic(music music) { Music = music; } public List<music> getMusicList() { return musicList; } public void setMusicList(List<music> musicList) { this.musicList = musicList; } public static long getSerialversionuid() { return serialVersionUID; } }
使用流的方式：
action：
package action; import java.io.ByteArrayInputStream; import java.io.InputStream; import java.io.UnsupportedEncodingException; import java.util.List; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import Util.HibernateUtil; import com.opensymphony.xwork2.ActionSupport; public class ajaxTest1 extends ActionSupport { /** * 判断姓名是否存在 */ private static final long serialVersionUID = 1L; private InputStream inputStream; private String name; private String location; @SuppressWarnings("unchecked") public String ajaxTest() throws UnsupportedEncodingException{ if(name.equals("")){ inputStream=new ByteArrayInputStream("姓名不可以是空值哦。".getBytes("utf-8")); System.out.println("AJAX invoing-------------name="+name); }else{ //inputStream=new ByteArrayInputStream("姓名可以使用".getBytes("utf-8")); SessionFactory sessionFactory= HibernateUtil.getSessionFactory(); Session session=sessionFactory.getCurrentSession(); Transaction tr= session.beginTransaction(); String hql="from domain.user where name='"+name+"' "; Query query=session.createQuery(hql); List<domain.user> list=query.list(); //System.out.println(list.get(0).getName()); if(!list.isEmpty()){ inputStream=new ByteArrayInputStream("姓名已存在。".getBytes("utf-8")); }else{ inputStream=new ByteArrayInputStream("姓名可以使用。".getBytes("utf-8")); } session.clear(); session.flush(); tr.commit(); } return SUCCESS; } public InputStream getInputStream() { return inputStream; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getLocation() { return location; } public void setLocation(String location) { this.location = location; } public static long getSerialversionuid() { return serialVersionUID; } }
jsp:
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%> <% 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>ajaxTest1</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"> <script type="text/javascript" src="jquery.min.js"></script> <script type="text/javascript" src="../js/jquery.js"></script> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script type="text/javascript"> $(function(){ alert(); $("#examine").focusout(function(){ test(); }); }); function test(){ $.ajax({ type: "POST", url: "ajax/ajaxTest1.action", data: "name="+$("#examine").val(), success: function(msg){ alert( "Data Saved: " + msg ); } }); } </script> </head> <body> <form action="" method="post" enctype="multipart/form-data"></form> <table> <tr> <td>姓名：</td> <td></td> <td>密码：</td> </tr> <tr> <td> <input name="username" type="text" maxlength="40" id="examine"></td> <td></td> <td> <input name="password" type="password" maxlength="40" ></td> </tr> </table> </body> </html>