Spring MVC 中 AJAX请求并返回JSON

/**
* 保存-同步(版本控制库)
*/
function saveSynchronizedVcHorse(obj) {
var ss = $("#SynchronizedSelection div");
var cacheSelectAry = new Array()
for(var i = 0; i < ss.length; i ++) {
//alert(ss.eq(i).html());
//alert(ss.eq(i).find('label').html());
var o=ss.eq(i).find('label').find("input[type='checkbox']"); var s = $(o).attr('checked');//由于$(obj).attr("checked", false); checked属性会被
if(s != null) {
cacheSelectAry.push($(o).attr('value'));
}
}
if(cacheSelectAry.length == 0) {
alert("请选择城市");
return;
}
var json = "SynchronizedBean={\"exceptionId\":\""+exceptionId+"\",\"cityIds\":["
for(var i = 0; i < cacheSelectAry.length; i ++) {
if(i == cacheSelectAry.length -1) {
json = json +"\""+ cacheSelectAry[i] + "\"";
} else {
json = json + "\"" + cacheSelectAry[i] + "\",";
}
}
json = json + "]}";
$.ajax({
type: "POST",
dataType: "json",
url: "../main/saveSynchronizedData",
data: json,
success: function(msg){
alert(msg.main);
},
error: function () {//XMLHttpRequest, textStatus, errorThrown
alert("请求失败");
}
});
}

@RequestMapping(value = "/saveSynchronizedData", method = RequestMethod.POST)
public @ResponseBody ModelAndView saveSynchronizedData(@RequestParam("SynchronizedBean") String mSynchronizedJSON) {
ObjectMapper objectMapper = new ObjectMapper();
Map<String, String> map = new HashMap<String, String>();
try {
SynchronizedBean bean = objectMapper.readValue(mSynchronizedJSON, SynchronizedBean.class);
if(bean != null) {
String[] ary = bean.getCityIds();
if(ary != null && ary.length > 0) {
for(String s : ary) {
VCHousePo po = new VCHousePo();
po.setExceptionId(bean.getExceptionId());
po.setCustomerCode(s);
po.setCreateTime(new Date());
po.setExceptionState(0);
vcHService.add(po);
}
}
}
map.put("msg", "success");
} catch (JsonParseException e) {
e.printStackTrace();
map.put("msg", "error");
} catch (JsonMappingException e) {
e.printStackTrace();
map.put("msg", "error");
} catch (IOException e) {
e.printStackTrace();
map.put("msg", "error");
}
return new ModelAndView(new MappingJackson2JsonView(),map);
}

import org.springframework.web.servlet.view.json.MappingJackson2JsonView;