struts2，实现Ajax异步通信

用例需要依赖的jar：

struts2-core.jar
struts2-convention-plugin.jar，非必须
org.codehaus.jackson.jar，提供json支持

用例代码如下：

数据库DDL语句

无

struts.xml

 <?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>

     <package name="basePackage" extends="json-default">

         <!-- 未到找Action指向页面 -->

         <default-action-ref name="404" />

         <global-exception-mappings>

             <exception-mapping result="exception" exception="java.lang.Exception"></exception-mapping>

         </global-exception-mappings>

         <action name="404">

             <result type="dispatcher">/WEB-INF/jsp/error/error_page_404.jsp</result>

         </action>

     </package>

     <!-- 入口地址：http://localhost:8888/struts2-test/test/gotoStruts2JsonPlugin.action -->

     <package name="ajax" namespace="/test" extends="basePackage">

         <action name="struts2JsonPlugin" method="struts2JsonPlugin"

             class="test.action.ajax.Struts2JsonPluginAction">

             <result type="json">

                 <!-- 指定浏览器不缓存服务器响应 -->

                 <param name="noCache">true</param>

                 <!-- 指定不包括Action中值为null的属性 -->

                 <param name="excludeNullProperties">true</param>

             </result>

         </action>

     </package>

 </struts>

java类

action类

BaseAction.java

 package test.util;

 import java.io.IOException;

 import java.io.StringWriter;

 import java.io.Writer;

 import java.util.HashMap;

 import java.util.Map;

 import javax.servlet.ServletContext;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.apache.log4j.Logger;

 import org.apache.struts2.ServletActionContext;

 import org.codehaus.jackson.JsonGenerator;

 import org.codehaus.jackson.JsonProcessingException;

 import org.codehaus.jackson.map.ObjectMapper;

 import com.opensymphony.xwork2.ActionSupport;

 public class BaseAction extends ActionSupport {

     private static final long serialVersionUID = 4271951142973483943L;

     protected Logger logger = Logger.getLogger(getClass());

     // 获取Attribute

     public Object getAttribute(String name) {

         return ServletActionContext.getRequest().getAttribute(name);

     }

     // 设置Attribute

     public void setAttribute(String name, Object value) {

         ServletActionContext.getRequest().setAttribute(name, value);

     }

     // 获取Parameter

     public String getParameter(String name) {

         return getRequest().getParameter(name);

     }

     // 获取Parameter数组

     public String[] getParameterValues(String name) {

         return getRequest().getParameterValues(name);

     }

     // 获取Request

     public HttpServletRequest getRequest() {

         return ServletActionContext.getRequest();

     }

     // 获取Response

     public HttpServletResponse getResponse() {

         return ServletActionContext.getResponse();

     }

     // 获取Application

     public ServletContext getApplication() {

         return ServletActionContext.getServletContext();

     }

     // AJAX输出，返回null

     public String ajax(String content, String type) {

         try {

             HttpServletResponse response = ServletActionContext.getResponse();

             response.setContentType(type + ";charset=UTF-8");

             response.setHeader("Pragma", "No-cache");

             response.setHeader("Cache-Control", "no-cache");

             response.setDateHeader("Expires", 0);

             response.getWriter().write(content);

             response.getWriter().flush();

         } catch (IOException e) {

             e.printStackTrace();

         }

         return null;

     }

     // AJAX输出文本，返回null

     public String ajaxText(String text) {

         return ajax(text, "text/plain");

     }

     // AJAX输出HTML，返回null

     public String ajaxHtml(String html) {

         return ajax(html, "text/html");

     }

     // AJAX输出XML，返回null

     public String ajaxXml(String xml) {

         return ajax(xml, "text/xml");

     }

     // 根据字符串输出JSON，返回null

     public String ajaxJson(String jsonString) {

         return ajax(jsonString, "application/json");

     }

     // 根据Map输出JSON，返回null

     public String ajaxJson(Map<String, String> jsonMap) {

         return ajax(mapToJson(jsonMap), "application/json");

     }

     // 输出JSON成功消息，返回null

     public String ajaxJsonSuccessMessage(String message) {

         Map<String, String> jsonMap = new HashMap<String, String>();

         jsonMap.put("status", SUCCESS);

         jsonMap.put("message", message);

         return ajax(mapToJson(jsonMap), "application/json");

     }

     // 输出JSON错误消息，返回null

     public String ajaxJsonErrorMessage(String message) {

         Map<String, String> jsonMap = new HashMap<String, String>();

         jsonMap.put("status", ERROR);

         jsonMap.put("message", message);

         return ajax(mapToJson(jsonMap), "application/json");

     }

     // map转化为json数据

     public String mapToJson(Map<String,String> map){

         ObjectMapper mapper = new ObjectMapper();

         Writer sw = new StringWriter();

         try {

             JsonGenerator json = mapper.getJsonFactory().createJsonGenerator(sw);

             json.writeObject(map);

             sw.close();

         } catch (JsonProcessingException e) {

             e.printStackTrace();

         } catch (IOException e) {

             e.printStackTrace();

         }

         return sw.toString();

     }

 }

Struts2AjaxAction.java

 package test.action.ajax;

 import java.io.UnsupportedEncodingException;

 import java.util.HashMap;

 import java.util.Map;

 import org.apache.commons.lang3.StringUtils;

 import org.apache.struts2.convention.annotation.Action;

 import org.apache.struts2.convention.annotation.Namespace;

 import org.apache.struts2.convention.annotation.ParentPackage;

 import org.apache.struts2.convention.annotation.Result;

 import test.util.BaseAction;

 @ParentPackage("ajax")

 @Namespace("/test")

 public class Struts2AjaxAction extends BaseAction

 {

     /**

      * struts2-ajax 用例

      */

     private static final long serialVersionUID = -4227395311084215139L;

     @Action(value = "gotoStruts2JsonPlugin", results = {

     @Result(name = "success", location = "/WEB-INF/content/test/ajax/struts2JsonPlugin.jsp")})

     public String gotoStruts2JsonPlugin()

     {

         return SUCCESS;

     }

     @Action(value = "gotoStruts2Ajax_post", results = {

     @Result(name = "success", location = "/WEB-INF/content/test/ajax/struts2Ajax_post.jsp")})

     public String struts2Ajax_post()

     {

         return SUCCESS;

     }

     @Action(value = "gotoStruts2Ajax_ajax", results = {

     @Result(name = "success", location = "/WEB-INF/content/test/ajax/struts2Ajax_ajax.jsp")})

     public String struts2Ajax_ajax()

     {

         return SUCCESS;

     }

     @Action(value = "post")

     public String post()

     {

         String f1 = StringUtils.defaultString(getRequest().getParameter("field1"));

         String f2 = StringUtils.defaultString(getRequest().getParameter("field2"));

         ajaxText(f1+"，测试，"+f2);

         return null;

     }

     @Action(value = "ajax")

     public String ajax() throws UnsupportedEncodingException

     {

         String f1 = StringUtils.defaultString(getRequest().getParameter("field1"));

         String f2 = StringUtils.defaultString(getRequest().getParameter("field2"));

         Map<String, String> jsonMap = new HashMap<String, String>();

         jsonMap.put(f1, f1);

         jsonMap.put(f2, f2);

         jsonMap.put("status", SUCCESS);

         super.ajaxJson(jsonMap);

         return null;

     }

 }

jsp

struts2Ajax_post.jsp

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>

<%@ taglib prefix="s" uri="/struts-tags"%>

<%

request.setAttribute("cxtpath",request.getContextPath());

%>

<!DOCTYPE html>

<html>

<head>

<meta name="author" content="" />

<meta http-equiv="Content-Type" content="text/html; charset=GBK" />

<title>使用$.ajax提交Ajax请求</title>

<s:property value="cxtpath"/>

<script src="${cxtpath}/js/common/jquery-1.9.1.js" type="text/javascript"></script>

<script type="text/javascript">

function ajax()

{

    // 以form1表单封装的请求参数发送请求。

    var val1 = $("#form1_field1").val();

    var val2 = $("#form1_field2").val();

    $.ajax({

        url: '${cxtpath}/test/ajax.action',

        data: {"field1": val1,"field2": val2},

        dataType: "json",

        async: false,

        type: "POST",

        success: function(data) {

            console.log("data:"+JSON.stringify(data));

            if (data.status == "success") {

                console.log("succ");

            }else{

                data;

                console.log("fail");

            }

        }

    });

}

</script>

</head>

<body>

<div>使用$.ajax提交Ajax请求

<s:form id="form1" method="post">

    field1：<s:textfield name="field1" label="field1"/><br/>

    field2：<s:textfield name="field2" label="field2"/><br/>

    field3：<s:textfield name="field3" label="field3"/><br/>

    <tr>

        <td colspan="2">

        <input type="button" value="提交" onClick="ajax();"/></td>

    </tr>

</s:form>

</div>

</body>

</html>

struts2Ajax_ajax.jsp

 <%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>

 <%@ taglib prefix="s" uri="/struts-tags"%>

 <%

 request.setAttribute("cxtpath",request.getContextPath());

 %>

 <!DOCTYPE html>

 <html>

 <head>

 <meta name="author" content="" />

 <meta http-equiv="Content-Type" content="text/html; charset=GBK" />

 <title>使用$.post提交Ajax请求</title>

 <s:property value="cxtpath"/>

 <script src="${cxtpath}/js/common/jquery-1.9.1.js" type="text/javascript"></script>

 <script type="text/javascript">

 function post()

 {

     // 以form1表单封装的请求参数发送请求。

     $.post('${cxtpath}/test/post.action', $("#form1").serializeArray(),

         // data代表服务器响应，此处只是把服务器响应显示出来

         function(data) {

             console.log("data:"+JSON.stringify(data));

         }

     )

 }

 </script>

 </head>

 <body>

 <div>使用$.post提交Ajax请求

 <s:form id="form1" method="post">

     field1：<s:textfield name="field1" label="field1"/><br/>

     field2：<s:textfield name="field2" label="field2"/><br/>

     field3：<s:textfield name="field3" label="field3"/><br/>

     <tr>

         <td colspan="2">

         <input type="button" value="提交" onClick="post();"/></td>

     </tr>

 </s:form>

 </div>

 </body>

 </html>

环境：JDK1.6，MAVEN，tomcat，eclipse

源码地址：http://files.cnblogs.com/files/xiluhua/struts2-Ajax.rar

秒客网

struts2，实现Ajax异步通信

相关文章