jquery + struts2 + json示例
本文主要是演示一下怎么在 jquery + struts2 下使用json 来传数据，实现的效果很简单，在页面输入 “用户编号”和“用户名称” 下面用一个层来显示。
首先是regist.jsp
<%@ page contentType="text/html; charset=UTF-8"%><%@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> <title>Regist.jsp</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="<%=basePath %>script/jquery-1.3.2.js"></script> <script language="javascript" type="text/javascript"> function showPersonInfo() { var authorid = $("#authorid").val(); var authorname=$("#authorname").val(); var url ="<%=request.getContextPath() %>/personAjaxAction.action"; $.post(url,{authorid:authorid,authorname:authorname},callback,"json"); } function callback(data) { var rs = data.person var html = ""; html+="<table><tr><td>用户编号：</td><td>"+rs.authorid+"</td></tr><tr><td>用户名称：</td> <td>"+rs.authorname+"</td></tr>"; $("#showPersonInfo").html(html); } </script> </head> <body> <form method="post"> 用户编号：<input type="text" id="authorid" name="person.authorid"/><br> 用户名称：<input type="text" id="authorname" name="person.authorname"/><br> <input type="button" value="ajax" name="ajaxsubmit" onclick="showPersonInfo();"/> </form> <div id="showPersonInfo"></div> </body> </html>?
web.xml的配置：
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"> <web-app> <display-name>Struts 2.0 Hello World</display-name> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
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struts.xml 的配置：
<!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.i18n.encoding" value="UTF-8"></constant> <!-- <package name="tutorial" extends="struts-default"> <action name="personAction" extends="json-default" namespace="/"> <action name="personAjaxAction" method="showPersonInfo"> <result type="json"/> </action> </package> </struts>
?PersonAction 的源码：
package tutorial.entity;import javax.servlet.http.HttpServletRequest;import org.apache.struts2.interceptor.ServletRequestAware;import com.opensymphony.xwork2.ActionSupport;public class PersonAction extends ActionSupport implements ServletRequestAware {private static final long serialVersionUID = 4787323253923443929L; private HttpServletRequest request; private Person person; public void setServletRequest(HttpServletRequest request) { this.request = request; } public String showPersonInfo() { person = new Person(); person.setAuthorid(request.getParameter("authorid")); person.setAuthorname(request.getParameter("authorname")); return SUCCESS; } public Person getPerson() { return person; } public void setPerson(Person person) { this.person = person; } }?
所使用到的包：
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commons-fileupload-1.2.1.jar
commons-io-1.3.2.jar
commons-logging-1.0.4.jar
commons-logging-1.1.jar
freemarker-2.3.16.jar
javassist-3.7.ga.jar
json-lib-2.1-jdk15.jar
log4j-1.2.11.jar
ognl-3.0.jar
struts2-core-2.2.1.1.jar
struts2-json-plugin-2.2.1.1.jar
xwork-core-2.2.1.1.jar
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我使用的struts是2.2.1 版本 jdk是1.5的 tomcat是5.X 。其中的：
commons-fileupload-1.2.1.jar
commons-io-1.3.2.jar
freemarker-2.3.16.jar
javassist-3.7.ga.jar
ognl-3.0.jar
struts2-core-2.2.1.1.jar
xwork-core-2.2.1.1.jar
可以下一个struts包在 路径“struts-2.2.1.1\apps\struts2-blank\WEB-INF\lib”
下找到。
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json-lib-2.1-jdk15.jar
struts2-json-plugin-2.2.1.1.jar
这两个包在struts-2.2.1.1\lib 下可以找到。
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做这个例子真是麻烦，首先是tomcat5.X和jdk1.5 的包冲突，tomcat启动不了。后来能起来了，又报404错，网上查了半天发现是struts的版本和json的版本对不上。
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虽然功能实现了但是有一点我还是不明白，PersonAction 的showPersonInfo 方法只返回一个“SUCCESS” ，而回调函数就能用data.person来访问 person ，是不是回调方法的data参数封装了PersonAction 的所有成员变量。哪为大侠弄明白了，说一下，谢谢！