Struts+jsonplugin

JSON官方文档

http://www.json.org/json-zh.html

 

jQuery官方文档

http://docs.jquery.com/Main_Page

 

<SPAN style="FONT-SIZE: small">function removerecordbyid(recordid){
         $("#showallrecord table tr").each(
         function(){
           var seq=parseInt($(this).children("td").html());
           var thisrecord = this;
           if(seq==recordid)
             if(confirm("您确认执行删除操作么?")){
                $.ajax({
                     type: "POST",
                     url:"removeRecordById.action",
                     dataType:"json",
                     data:{"msg.id":recordid},
                     success:function(json){
                         if(json.status==4){
                             alert("删除失败,只有提交留言的ip才能删除");
                         }else{
                            $(thisrecord).remove();
 //                          alert("删除成功");
                        }
                    },
                     error:function(){
                         alert("del error");
                    }
                });
            }
        });
    }


         function getrecordbypage(page){
        $.ajax({
             type: "POST",
             url:"listAllRecordByPage.action",
             dataType:"json",
             data:{"page":page},
             success:function(json){
                 var strs="<table border=\"1\"><tr id='colattr'><td>key-id</td><td>昵称</td><td>留言时间</td><td width='120'>邮箱</td><td width='120'>博客</td><td width='250'>留言</td><td>操作</td></tr>";
                 for(i=0;i<json.records.length;i++){
                     str="<tr id='"+json.records[i].id+"' onclick='lineclick(this);'><td>"+json.records[i].id+"</td><td>"+json.records[i].from+"</td><td>"+json.records[i].addDate+"</td><td>"+json.records[i].mail+"</td><td>"+json.records[i].site+"</td><td>"+json.records[i].cont+"</td><td><a onclick='removerecordbyid("+json.records[i].id+");'>删除</a></td></tr>"
                    strs=strs+str
                }
                 strs=strs+"</table>"
                 $("#showallrecord").html(strs);
            },
             error:function(){
                 alert("error");
            }
        });

    };</SPAN>

function removerecordbyid(recordid){ $("#showallrecord table tr").each( function(){ var seq=parseInt($(this).children("td").html()); var thisrecord = this; if(seq==recordid) if(confirm("您确认执行删除操作么?")){ $.ajax({ type: "POST", url:"removeRecordById.action", dataType:"json", data:{"msg.id":recordid}, success:function(json){ if(json.status==4){ alert("删除失败,只有提交留言的ip才能删除"); }else{ $(thisrecord).remove(); // alert("删除成功"); } }, error:function(){ alert("del error"); } }); } }); } function getrecordbypage(page){ $.ajax({ type: "POST", url:"listAllRecordByPage.action", dataType:"json", data:{"page":page}, success:function(json){ var strs="<table border=\"1\"><tr id='colattr'><td>key-id</td><td>昵称</td><td>留言时间</td><td width='120'>邮箱</td><td width='120'>博客</td><td width='250'>留言</td><td>操作</td></tr>"; for(i=0;i<json.records.length;i++){ str="<tr id='"+json.records[i].id+"' onclick='lineclick(this);'><td>"+json.records[i].id+"</td><td>"+json.records[i].from+"</td><td>"+json.records[i].addDate+"</td><td>"+json.records[i].mail+"</td><td>"+json.records[i].site+"</td><td>"+json.records[i].cont+"</td><td><a onclick='removerecordbyid("+json.records[i].id+");'>删除</a></td></tr>" strs=strs+str } strs=strs+"</table>" $("#showallrecord").html(strs); }, error:function(){ alert("error"); } }); };

 

注意dataType:"json"这个参数一定不能少,否则不能正确识别

一下是Struts action代码

<SPAN style="FONT-SIZE: small">public class CrudMsgAction extends ActionSupport{
     private Record msg;
     private int index;
     private RecordService recordService;
     private List<Record> records;
     private int status = 0;
     private int page = 0;

     @JSON(serialize=false)
     public RecordService getRecordService() {
         return recordService;
    }
 //other getter and setter
     @Override
     public String execute() throws Exception {
         return SUCCESS;
    }

     /**
     * 返回所有记录的JSON数据
     * @return list . All of the record.
     * @throws Exception
     */
     public String listAllRecord() throws Exception{
        List<Record> list = recordService.listAllRecord();
 //      List list = Arrays.asList(allRecord);
 //      List<Record> list2 = (List<Record>)list;

         //      Record rec = (Record)list.get(0);
        records = list;
         return SUCCESS;
    }

     public String listAllRecordByPage() throws Exception{
        List<Record> list = recordService.listAllRecord(page);
        records = list;
         return SUCCESS;
    }


     /**
     * 插入记录
     * @return update the view with AJAX when struts2 action return
     * @throws Exception
     */
     public String insertRecord() throws Exception{
         //插入留言日期设置
         msg.setAddDate(new Date());
         //获取客户端ip,setIpaddr
        String clientIpAddr = ServletActionContext.getRequest().getRemoteAddr();
        msg.setIpaddr(clientIpAddr);
         //判断是否为空
         if("".equals(msg.getFrom()))msg.setFrom("anonymous");
         if("".equals(msg.getMail()))msg.setMail("@");
         if("".equals(msg.getSite()))msg.setSite("-");
         if("".equals(msg.getCont()))msg.setCont("这家伙很懒,什么都没留下");

        recordService.insertRecord(msg);
         return SUCCESS;
    }
     /**
     * 通过索引查找记录
     * @return the field msg
     * @throws Exception
     */
     public String listRecordByIndex() throws Exception{
        List<Record> list = recordService.listAllRecord();
         this.msg = list.get(this.getIndex());

         return SUCCESS;
    }
     /**
     * 删除对应id记录
     * @return field status. in order to update view with AJAX
     * @throws Exception
     */
     public String removeRecordById() throws Exception{
        String clientIpAddr = ServletActionContext.getRequest().getRemoteAddr();
        Record r = recordService.listRecordById(msg.getId());
         if(clientIpAddr.equals(r.getIpaddr())){
            recordService.removeRecordById(msg.getId());
             return SUCCESS;
        }
         status = 4;
         return SUCCESS;
    }

     /**
     * 获得分页数
     * @return pageSize using field page
     * @throws Exception
     */
     public String getPageSize() throws Exception{
        page = recordService.getPage();
         return SUCCESS;
    }
}</SPAN>

public class CrudMsgAction extends ActionSupport{ private Record msg; private int index; private RecordService recordService; private List<Record> records; private int status = 0; private int page = 0; @JSON(serialize=false) public RecordService getRecordService() { return recordService; } //other getter and setter @Override public String execute() throws Exception { return SUCCESS; } /** * 返回所有记录的JSON数据 * @return list . All of the record. * @throws Exception */ public String listAllRecord() throws Exception{ List<Record> list = recordService.listAllRecord(); // List list = Arrays.asList(allRecord); // List<Record> list2 = (List<Record>)list; // Record rec = (Record)list.get(0); records = list; return SUCCESS; } public String listAllRecordByPage() throws Exception{ List<Record> list = recordService.listAllRecord(page); records = list; return SUCCESS; } /** * 插入记录 * @return update the view with AJAX when struts2 action return * @throws Exception */ public String insertRecord() throws Exception{ //插入留言日期设置 msg.setAddDate(new Date()); //获取客户端ip,setIpaddr String clientIpAddr = ServletActionContext.getRequest().getRemoteAddr(); msg.setIpaddr(clientIpAddr); //判断是否为空 if("".equals(msg.getFrom()))msg.setFrom("anonymous"); if("".equals(msg.getMail()))msg.setMail("@"); if("".equals(msg.getSite()))msg.setSite("-"); if("".equals(msg.getCont()))msg.setCont("这家伙很懒,什么都没留下"); recordService.insertRecord(msg); return SUCCESS; } /** * 通过索引查找记录 * @return the field msg * @throws Exception */ public String listRecordByIndex() throws Exception{ List<Record> list = recordService.listAllRecord(); this.msg = list.get(this.getIndex()); return SUCCESS; } /** * 删除对应id记录 * @return field status. in order to update view with AJAX * @throws Exception */ public String removeRecordById() throws Exception{ String clientIpAddr = ServletActionContext.getRequest().getRemoteAddr(); Record r = recordService.listRecordById(msg.getId()); if(clientIpAddr.equals(r.getIpaddr())){ recordService.removeRecordById(msg.getId()); return SUCCESS; } status = 4; return SUCCESS; } /** * 获得分页数 * @return pageSize using field page * @throws Exception */ public String getPageSize() throws Exception{ page = recordService.getPage(); return SUCCESS; } }

 

在上面代码中，使用了JSON注释@JSON(serialize=false),
除此之外，JSON注释还支持如下几个域：
name：指定Action属性被序列化成JSON对象的属性名。
serialize：设置是否序列化该属性
deserialize：设置是否反序列化该属性。
format：设置用于格式化输出、解析日期表单域的格式。例如"yyyy-MM-dd'T'HH:mm:ss"。

 

<SPAN style="FONT-SIZE: small"><?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.objectFactory" value="spring"/>
     <package name="json" extends="json-default">
         <action name="ajaxRequest" class="com.jun.demos.struts2json.HelloWorld">
             <result type="json" />
         </action>
         <action name="listIndexRecord" class="com.jun.demos.book.action.CrudMsgAction">
             <result type="json" />
         </action>
         <action name="listAllRecord" class="com.jun.demos.book.action.CrudMsgAction" method="listAllRecord">
             <result type="json" />
         </action>
         <action name="listAllRecordByPage" class="com.jun.demos.book.action.CrudMsgAction" method="listAllRecordByPage">
             <result type="json" />
         </action>
         <action name="insertRecord" class="com.jun.demos.book.action.CrudMsgAction" method="insertRecord">
             <result type="json" />
         </action>
         <action name="removeRecordById" class="com.jun.demos.book.action.CrudMsgAction" method="removeRecordById">
             <result type="json" />
         </action>
         <action name="getPageIndex" class="com.jun.demos.book.action.CrudMsgAction" method="getPageSize">
             <result type="json" />
         </action>

     </package>
 </struts></SPAN>

<?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.objectFactory" value="spring"/> <package name="json" extends="json-default"> <action name="ajaxRequest" class="com.jun.demos.struts2json.HelloWorld"> <result type="json" /> </action> <action name="listIndexRecord" class="com.jun.demos.book.action.CrudMsgAction"> <result type="json" /> </action> <action name="listAllRecord" class="com.jun.demos.book.action.CrudMsgAction" method="listAllRecord"> <result type="json" /> </action> <action name="listAllRecordByPage" class="com.jun.demos.book.action.CrudMsgAction" method="listAllRecordByPage"> <result type="json" /> </action> <action name="insertRecord" class="com.jun.demos.book.action.CrudMsgAction" method="insertRecord"> <result type="json" /> </action> <action name="removeRecordById" class="com.jun.demos.book.action.CrudMsgAction" method="removeRecordById"> <result type="json" /> </action> <action name="getPageIndex" class="com.jun.demos.book.action.CrudMsgAction" method="getPageSize"> <result type="json" /> </action> </package> </struts>

 配置该Action与配置普通Action存在小小的区别。

包继承了json-default包，而不再继承默认的default包，这是因为只有在该包下才有json类型的Result。
result可以使用<param name="excludeProperties">page,index</param>
排除Action中这些都不返回的属性.

结合action中属性getter方法注解@JSON(serialize=false)灵活配置

异常解决:

 

Nested in javax.servlet.ServletException: com.googlecode.jsonplugin.JSONException: com.googlecode.jsonplugin.JSONException: com.googlecode.jsonplugin.JSONException: com.googlecode.jsonplugin.JSONException: com.googlecode.jsonplugin.JSONException: com.googlecode.jsonplugin.JSONException: java.lang.reflect.InvocationTargetException:

com.google.apphosting.utils.jetty.JettyLogger warn

Nested in javax.servlet.ServletException: com.googlecode.jsonplugin.JSONException: com.googlecode.jsonplugin.JSONException: com.googlecode.jsonplugin.JSONException: com.googlecode.jsonplugin.JSONException: com.googlecode.jsonplugin.JSONException: com.googlecode.jsonplugin.JSONException: java.lang.reflect.InvocationTargetException:

com.google.apphosting.utils.jetty.JettyLogger warn

 

这里下面有4-5页的异常信息，就不贴出来了

 

解决方法：

出现这个问题是某属性通过串行化json数据异常，

因为使用的spring注入属性recordService，也就是提供了getter和setter，

而sturts-plugin是通过getterXxx把Xxx属性串行化输出JSON到客户端，

所以解决这个异常方法就是在不需要串行化的属性的getter前加上annotation，

就是@JSON(Serialize=false)

 

代码如：

   

   

@JSON(serialize=false)

     public RecordService getRecordService() {

        return recordService;

    }