SpringMVC ajax请求 – java.io.EOFException：由于输入结束，没有要映射到Object的内容
我正在开发SpringMVC应用程序，我使用ajax调用从数据库请求了一些数据，数据作为json对象返回。 我现在必须将此数据发送回服务器进行一些处理并返回到表单。
但是我在浏览器中收到错误服务器遇到内部错误，导致无法完成此请求。 在调查错误日志时我看到了这个：
错误日志
Controller [com.crimetrack.web.MapController] Method [public com.crimetrack.business.Marker com.crimetrack.web.MapController.getNewCoordinates(com.crimetrack.business.Marker) throws java.lang.Exception] java.io.EOFException: No content to map to Object due to end of input at org.codehaus.jackson.map.ObjectMapper._initForReading(ObjectMapper.java:1324) at org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:1275) at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:941) at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.readInternal(MappingJacksonHttpMessageConverter.java:124) at org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:153) at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:120) at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:91) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:71) at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:75) at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:156) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:117) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96) Ajax Call
$('#getCoordinates').on('click',function(){ $.each(global_citizens, function(i, gc){ $.ajax({ type:'GET', url:'getNewCoordinatesForMarkers.htm', contentType: 'application/json', data:{citizens:JSON.stringify(global_citizens[i])}, dataType: 'json', success:function(new_citizens){ $.each(new_citizens, function(i, c) { console.log(c.name + ' | ' + c.socialSecurityNumber + ' | ' + c.lat+ ' | ' +c.lng); }); } }); }); });
调节器
@RequestMapping(value = "getNewCoordinatesForMarkers.htm", method = {RequestMethod.GET}, headers = {"content-type=application/json"}) public @ResponseBody Marker getNewCoordinates(@RequestBody Marker citizens)throws Exception{ logger.info("Getting Markers"); Marker citizenMarker = this.markerManager.getNextLocation(citizens); return citizenMarker; }
Marker.java
public class Marker implements Serializable{ private int socialSecurityNumber; private String name; private int citizenType; private double lat; private double lng; //getters and setters
JSON DATA – 从firebug控制台获取
citizens{"name":"Jessie Small","lat":10.670044,"lng":-61.515305,"socialSecurityNumber":1999020214,"citizenType":3}
FireBug – 正在传递内容
Connection close Content-Length 3696 Content-Type text/html;charset=utf-8 Date Tue, 07 May 2013 05:52:09 GMT Server Apache-Coyote/1.1 Request Headers Accept application/json, text/javascript, */*; q=0.01 Accept-Encoding gzip, deflate Accept-Language en-US,en;q=0.5 Content-Type application/json Cookie tinymcePasteText=1; JSESSIONID=CC4F12D00C836FE0DB86D2493556275C Host localhost:8084 Referer http://localhost:8084/crimeTrack/crimeTrackMap.htm User-Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:20.0) Gecko/20100101 Firefox/20.0 X-Requested-With XMLHttpRequest
我做了这个代码来预加载自动完成function的所有产品，也许这个例子不完全适合你的代码，但我希望你能从中得到一些东西：
控制器function：
@RequestMapping(value = "allproduct", method = RequestMethod.GET, headers = "Accept=*/*") public @ResponseBody String productList() { List products = ProductDAO.INSTANCE.listProduct(); String json = "["; for (int i = 0; i < products.size(); i++) { Product o = products.get(i); if (i > 0) { json += ","; } json += "{\"value\":\"" + o.getCode() + "\",\"label\":\"" + o.getCode() + " - " + o.getProvider() + " - " + o.getNominal() + "\",\"price\":\"" + o.getPrice() + "\",\"cost\":\"" + o.getCost() + "\"}"; } json += "]"; System.out.println(json); return json; }
在我的jsp中，我使用jquery来调用该函数：
$.getJSON('/product/allproduct', function(json) { $("#product").autocomplete({ source : json, select : function(event, ui) { $("#product").val(ui.item.value); $("#kredit").val(ui.item.cost); $("#price").val(ui.item.price); return false; } }); });
看看这里的json格式 。 数组示例：
[ { "name": "Jason", "number": "10" }, { "name": "Jimmy", "number": "11" } ]
这是对我有用的控制器的改变
@RequestMapping(value = "getNewCoordinatesForMarkers.htm", method = {RequestMethod.POST},produces = "application/json; charset=utf-8") public @ResponseBody Marker getNewCoordinates(@RequestBody Marker json)throws Exception{ JSONObject jsonObj = JSONObject.fromObject(json); ObjectMapper mapper = new ObjectMapper(); Marker citizen = mapper.readValue(jsonObj.toString(), new TypeReference(){}); logger.info("Getting Markers"); Marker citizenMarker = this.markerManager.getNextLocation(citizen); return citizenMarker; }
如果标题中不包含“Content-Length”，则会出现该错误。