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Prototype的Ajax.Request类与Struts2的Ation通信方式Sample
 

第一部分：页面中JavaScript的写法：

 

function isSoleContractName(contractNameTextBox){

                var contractName=contractNameTextBox.value;

                var sameNameContractId="NONE";

 

                var url=encodeURI('<%=request.getContextPath()%>/contract/checkSoleContractName.action?contractName='+contractName);

                url=encodeURI(url);// 有中文进行两次编码

 

                new Ajax.Request(url,{     

                                   method:'post',     

                                   onSuccess: function(ajaxObj){                            

                                                                var status=ajaxObj.responseXML.getElementsByTagName("status")[0].firstChild.data;

                                                                                                                                

                                                                if(status=="ok"){

                                                                                // 返回正确信息

                                                                                

                                                                                // 找到所有节点放入数组

                                                                                var id=ajaxObj.responseXML.getElementsByTagName("contractId")[0].firstChild.data;

                                                                                sameNameContractId=id;

                                                                                

                                                                                if(sameNameContractId != "NONE"){

                                                                                                // 得到本身的ID

                                                                                                var contractId = document.getElementById("instance.contractId").value;

                                                                                                

                                                                                                if(contractId!=sameNameContractId){

                                                                                                                // 验证结果有重复的，弹出对话框提示用户

                                                                                                                var text="您输入的合同名称与ID为"+sameNameContractId+"的合同名称重复,请更改一下。";

                                                                                                                alert(text);

                                                                                                                contractNameTextBox.focus();

                                                                                                }

                                                                                }

                                                                                else{

                                                                                                return;

                                                                                }

                                                                }

                                                                else{

                                                                                // 返回错误信息

                                                                                var text=ajaxObj.responseXML.getElementsByTagName("text")[0].firstChild.data;

                                                                                msger.showWarningMsg("出现错误"+text);

                                                                }

                                   },     

                                   onFailure: function(){ 

                                                   msger.showErrorMsg("无法取得服务器的响应");

                                   }   

                                }

                ); 

}

第二部分：

Struts2中对应Action的写法：

public class CheckSoleContractNameAction extends AbstractAction {

                private static final long serialVersionUID = 9000299191145305626L;

                

                private TbContractService contractService;

                

                private String contractName;

                

                public String execute() throws IOException{

                                HttpServletResponse response = ServletActionContext.getResponse();

                                response.setContentType("text/xml;charset=UTF-8");

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

                                HttpServletRequest request=ServletActionContext.getRequest();

                                request.setCharacterEncoding("UTF-8");  

                                

                                contractName=UTF8Coder.decode(contractName);

                                System.out.println("contractName 1="+contractName);

                                

                                // 得到同名合同的ID

                                String sameNameContractId=getSameNameComtractId(contractName);

                                

                                if(sameNameContractId==null){

                                                StringBuilder sb=new StringBuilder();

                                                sb.append("<response>");

                                                sb.append("<status>ok</status>");

                                                sb.append("<contractId>NONE</contractId>");

                                                sb.append("</response>");

                                                

                                                response.getWriter().write(sb.toString());

                                                response.getWriter().close();

                                }

                                else{

                                                StringBuilder sb=new StringBuilder();

                                                sb.append("<response>");

                                                sb.append("<status>ok</status>");

                                                sb.append("<contractId>"+sameNameContractId+"</contractId>");

                                                sb.append("</response>");

                                                

                                                response.getWriter().write(sb.toString());

                                                response.getWriter().close();

                                }

                                

                                return null;

                }

}

 

第三部分：涉及后台UTF-8转码的类：

import java.io.UnsupportedEncodingException;

import java.net.URLDecoder;

import java.net.URLEncoder;

 

 

/**

 * UTF8转码器

 * @author heyang

 *

 */

public class UTF8Coder{

                private static final String UTF_8 = "utf-8";// 编码形式

 

                /**

                 * 对文字进行UTF8转码

                 * @param str

                 * @return

                 */

                public static String encode(String str){

                                try {

                                                return URLEncoder.encode(str, UTF_8);

                                } catch (UnsupportedEncodingException e) {

                                                return null;

                                }

                }

                

                /**

                 * 将转码后的文字还原

                 * @param str

                 * @return

                 */

                public static String decode(String str){

                                try {

                                                return URLDecoder.decode(str, UTF_8);

                                } catch (UnsupportedEncodingException e) {

                                                return null;

                                }

                }

}

 

注意点：

1.       如果请求参数有中文，切记用JavaScript函数encodeURI进行两次编码，在服务器端用URLDecoder类解码，此方式万无一失。

在控制台打印不是可以完全信任的，比如我的英文系统中Eclipse控制台中中文打印出来就是问号，但是实际上是正常的中文。因此，不要以控制台输入正确的文字才认为转码成功。
posted on 2011-03-14 11:35 何杨 阅读(364) 评论(0)  编辑  收藏

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