关于struts2的问题

Question

前台部分：

function doSendMessage()

 { 
   var message = $('#message').val(); 
   var account = $('#account').val(); 
   if($.trim(message)=='') 
   { 
      return; 
   } 
   showProcess('正在发送，请稍后......'); 
   var $strParams = {'sendType':'1','receiver':account,'data':{'content': message}};    

$.post("<%=basePath%>/cgi/message_send.action", $strParams,

  function(data){ 
   
     hideProcess(); 
     showSTip("发送成功"); 
     doHideDialog("messageDialog"); 
      
    },"json"); 
 }

public class Message implements Serializable{
 /**
 * 
 */
 private static final long serialVersionUID = 1L;
 private String key;
 private int sendType;
 private String Receiver;
 private long timestamp;
 private HashMap<String, String> data;
 public Message() {


 data = new HashMap<String, String>();
 timestamp = System.currentTimeMillis();
 }
 public String getKey() {
 return key;
 }


 public String get(String k) {
 return data.get(k);
 }


 public long getTimestamp() {
 return timestamp;
 }


 public void setTimestamp(long timestamp) {
 this.timestamp = timestamp;
 }


 public void setKey(String key) {
 this.key = key;
 }


 public void put(String k, String v) {
 data.put(k, v);
 }


 public void remove(String k) {
 data.remove(k);
 }


 public HashMap<String, String> getData() {
 return data;
 }
 
 public void setData(HashMap<String, String> data) {
 this.data = data;
 }
 public int getSendType() {
 return sendType;
 }
 public void setSendType(int sendType) {
 this.sendType = sendType;
 }
 
 public String getReceiver() {
 return Receiver;
 }
 public void setReceiver(String receiver) {
 Receiver = receiver;
 }
 @Override
 public String toString() {
 StringBuffer buffer = new StringBuffer();
 buffer.append("{"key":"").append(key).append("",");
 buffer.append(""sendType":"").append(sendType).append("",");
 buffer.append(""Receiver":"").append(Receiver).append("",");
 buffer.append(""timestamp":"").append(timestamp).append("",");
 buffer.append(""data":{");
 AtomicInteger connectionsCounter = new AtomicInteger(0);
 int size = data.keySet().size();
 for (String key : data.keySet()) {
 if (connectionsCounter.get() == size - 1) {
 buffer.append(""" + key + "":"").append(data.get(key)).append(""");
 } else {
 buffer.append(""" + key + "":"").append(data.get(key))
 .append("",");
 }
 connectionsCounter.incrementAndGet();
 }
 buffer.append("}}");
 return buffer.toString();
 }


 public String toJsonString() {


 return toString();
 }
}
              

Answer 1

去掉那段toString()的方法map里面的key还是null

Answer 2

参数是肯定传过来了，看起来是你在处理数据的地方出错了，就是在第二段代码的toString方法里；无论你信不信，这段代码真丑陋。