getJSON解决 跨域问题例子

前台：

$.getJSON("http://www.xiangan.gov.cn:8082/xahd/common/jdbcPage.as?jsoncallback=?"
				,{"_in":"letter@603","pageSize":"1","deptId":"24","isPub":"0"},function(data){
				//alert(data);
				//alert(data.result[1].page.pageSize);
				var jsonData = data;//eval('('+ data +')');//把json字将符串 转换成json对象，方便js使用
				var tpl = document.getElementById('templatelist').innerHTML;
				var html='';
       			var result = jsonData.result[0];
				if(jsonData.result[0].data !=''){	
					html = juicer(tpl, jsonData.result[0]);//用模板引擎得到的数据行，样式可以在模板调试
					//alert(html);
				}
				var page = jsonData.result[1].page;
				pg = new showPages((page.totalRecord+'' == "" ? 0 : page.totalRecord+''), page.totalPage+'', page.pageNo+'', '','', page.pageSize);
       			var pageText = pg.createDivHtml(0);
       			$("#pageTD").append(pageText);
				$("#tabTemp").append(html);//将拼接好的html直接追加在后面

java后台：

@Override
	public void searchPageDataForList(Page page) throws Exception{
		String pageSize = paraPool.get("pageSize");
		String pageNo = paraPool.get("currpage");
		String isPub = paraPool.get("isPub");
		if(pageSize == null || "".equals(pageSize))//每页多少条
			pageSize = "20";
		if(pageNo == null || "".equals(pageNo))//当前页数
			pageNo = "1";
		if(isPub == null || "".equals(isPub))//是否发布，默认需要发布的数据
			isPub = "1";
		page.setPageNo(Integer.valueOf(pageNo));
		page.setPageSize(Integer.valueOf(pageSize));
		String deptId = paraPool.get("deptId");
		if(deptId == null || "".equals(deptId))
			throw new HBusinessException("部门ID不能为空!");
		
		String sql = "select a.* from hdzx_letter a,hdzx_leader b where  a.c_leaderId=b.c_id ";
		sql +=" and a.c_isPublished="+isPub+" and b.c_lettertypeid="+Leader.LETTERTYPE.BM;
		sql +=" and a.c_hasdelete <> 1 and a.c_changeDeptId="+deptId;
		List<Map<String,String>> list = jdbc.search(sql,page," c_createtime desc");
		for(Map<String,String> map : list){
			String createtime = map.get("createtime");
			String replytime = map.get("replytime");
			String letterstatusid = map.get("letterstatusid");
			String changedeptid = map.get("changedeptid");
			String requestpurposeid = map.get("requestpurposeid");
			String purposename = "";
			List<Dictionary> dicList = UCache.getDicPool().get("LETTERAIM");
			for(Dictionary dic : dicList){
				if(requestpurposeid.equals(dic.getId()+"")){
					purposename = dic.getName();
					break;
				}
			}
			String deptname = UTagFunction.getDeptName(Long.valueOf(changedeptid));
			createtime = UTagFunction.formatStr2DateStr(createtime, "yyyy-MM-dd");
			replytime = UTagFunction.formatStr2DateStr(replytime, "yyyy-MM-dd");
			String letterstatusname = letterstatusid.equals(Letter.LETTER_STATUS.HAS_REPLY+"")?"已答复":"处理中";
			map.put("createtime", createtime);
			map.put("replytime", replytime);
			map.put("letterstatusname", letterstatusname);
			map.put("deptname", deptname);
			map.put("purposename", purposename);
		}
		String json = OrgUtil.buildToJsonData(list);
		String pageJson = OrgUtil.buildToJsonData(page);
		String jsoncallback = paraPool.get("jsoncallback");
		json = "{'result':[{'data':"+json+"},{'page':"+pageJson+"}]}";
		json = jsoncallback+"("+json+")";		System.out.println("jsoncallback=="+jsoncallback);
		System.out.println(json);
		HttpServletResponse res = ServletActionContext.getResponse();
		OutputStream os = res.getOutputStream();
		os.write(json.getBytes("utf-8"));
		os.flush();
		os.close();
	}

附上一个小项目，把他部署到其他域名下，一个是用来测试调用的的，注意细节


可以参考一下网站：http://hi.baidu.com/html5css3/item/7d25060f6d749decf55ba640