ajax+serlvet json格式数据操作

			
Servlet中转换JSON格式：

StringBuffer sb = new StringBuffer("[");
			for (int i = 0; i < sysLog.size();) {
				sb.append("{deal_date:'").append(sysLog.get(i).getDEAL_DATE())
						.append("',user_ip:'").append(
								sysLog.get(i).getUSER_IP()).append(
								"',user_id:'").append(
								sysLog.get(i).getUSER_ID()).append(
								"',deal_msg:'").append(
								sysLog.get(i).getDEAL_MSG()).append(
								"',pageCount:'").append(page.getPagecount())
						.append("',pageNum:'").append(page.getPagenum())
						.append("',totalNum:'").append(sysLog.size()).append(
								"'}");
				if (++i < sysLog.size()) {
					sb.append(",");
				}

			}
			sb.append("]");
			response.setContentType("application/x-json");
			PrintWriter out = response.getWriter();
			out.print(sb.toString());
			out.close();

js转换JSON格式：


/*
function getSysLog(url){
	currentPos="selectshow";
	var startTime=document.getElementById("startTime").value;
	var endTime=document.getElementById("endTime").value;
	var p="startTime="+startTime+"&endTime="+endTime;
	url+="?"+p;
	send_request_sysLog(url);
}

function send_request_sysLog(url) {//初始化、指定处理函数、发送请求的函数
	http_request = false;
	//开始初始化XMLHttpRequest对象
	if(window.XMLHttpRequest) { //Mozilla 浏览器
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {//设置MiME类别
			http_request.overrideMimeType('text/xml');
		}
	}
	else if (window.ActiveXObject) { // IE浏览器
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_request) { // 异常，创建对象实例失败
		window.alert("不能创建XMLHttpRequest对象实例.");
		return false;
	}
	http_request.onreadystatechange = showSysLog;
	// 确定发送请求的方式和URL以及是否同步执行下段代码
	http_request.open("GET", url, true);
	http_request.send(null);
}
function showSysLog(){
  if (http_request.readyState == 4) { // 判断对象状态
        if (http_request.status == 200) { // 信息已经成功返回，开始处理信息
	  var str=http_request.responseText;
	  var obj = new Function("return"+str)();
	  var tb="<table width=\"100%\" border=\"1\" class=\"neirongtxt\"><tr><td>日期</td><td>客户端IP</td><td>用户</td><td>操作信息</td></tr>"
      var pa=null;
     for( var b in obj) {
       var trs="<tr><td>"+obj[b].deal_date+"</td><td>"+obj[b].user_ip+"</td><td>"+obj[b].user_id+"</td><td>"+obj[b].deal_msg+"</td></tr>";
       tb=tb+trs;
       pa=obj[b];
       }
      tb=tb+"</table>";
      document.getElementById(currentPos).innerHTML=tb;
 
    }
    
}
}
*/