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2024年3月8日发(作者：press怎么记忆)

springmvccontroller返回json出错解决

1、出错的地方：

@RequestMapping(value = "/query")

@JsonSerialize(include=_NULL)

public @ResponseBody

JSONObject query(@RequestParam("startTime") String startTime,

@RequestParam("endTime") String endTime,

@RequestParam("oid") String oid, @RequestParam("cid") Integer cid,

@RequestParam("pay_channel") String payChannel,

@RequestParam("device_type") String deviceType,

@RequestParam("phone") Integer phone,

@RequestParam("perPage") Integer pageSize,

@RequestParam("skipIndex") Integer startIndex) throws Exception {

LogInfo info = populateQueryParam(startTime, endTime, oid, cid,

payChannel, deviceType, phone, pageSize, startIndex);

// 总记录数

Long totalCount = ogInfoCount(info);

if (totalCount == null) {

totalCount = 0L;

}

List list = ogInfo(info);

JSONObject retData = new JSONObject();

("success", true);

("data", list);

("error", "");

("totalRecords", totalCount);

return retData;

}

2、结果报错：

Apache Tomcat/7.0.42 - Error </p><p style="text-indent: 2em;";>report

HTTP Status 500 - Could not write

JSON: Object is null (through reference chain:

ject["data"]->ray[0]->ject["createTime"]->ll["empty"]); nested exception is

ppingException: Object is null (through

reference chain:

ject["data"]->ray[0]->ject["createTime"]->ll["empty"])

noshade="noshade">

type Exception report

message

Could not write JSON: Object is null (through reference chain:

ject["data"]->ray[0]->ject["createTime"]->ll["empty"]); nested exception is

ppingException: Object is null (through

reference chain:

ject["data"]->ray[0]->ject["createTime"]->ll["empty"])

description The server

encountered an internal error that prevented it from fulfilling this

request.

exception 

ssageNotWritableException: Could not write JSON: Object is null (through reference chain: 
ject["data"]->ray[0]->ject["createTime"]->ll["empty"]); nested exception is 
ppingException: Object is null (through 
reference chain: 
ject["data"]->ray[0]->ject["createTime"]->ll["empty"]) 
nternal(:203) 
(:179) 
ithMessageConverters(:148) 
ithMessageConverters(:90) 
ReturnValue(:189) 
ReturnValue(:69) 
AndHandle(:122) 
HandleMethod(:745) 
Internal(:686) 
(:80) 
atch(:925) 
ice(:856) 
sRequest(:936) 
(:838) 
e(:647) 
e(:812) 
e(:728) 
er(:61) 
eChain(:108) 
erInternal(:137) 
er(:125) 
er(:66) 
eChain(:449) 
ctShiroFilter$(:365) 
(:90) 
(:83) 
e(:383) 
erInternal(:362) 
er(:125) 
Delegate(:343) 
er(:260) 
erInternal(:88) 
er(:107)

root cause 

ppingException: Object is null 
(through reference chain: 
ject["data"]->ray[0]->ject["createTime"]->ll["empty"]) 
thPath(:218) 
thPath(:183) 
dThrow(:140) 
  
 3原因分析： 
可能是json序列化的问题 
代码修改为 
@RequestMapping(value = "/query") 
public @ResponseBody 
Map query(@RequestParam("startTime") String startTime, 
@RequestParam("endTime") String endTime, 
@RequestParam("oid") String oid, @RequestParam("cid") Integer cid, 
@RequestParam("pay_channel") String payChannel, 
@RequestParam("device_type") String deviceType, 
@RequestParam("phone") Integer phone, 
@RequestParam("perPage") Integer pageSize, 
@RequestParam("skipIndex") Integer startIndex) throws Exception { 
  
LogInfo info = populateQueryParam(startTime, endTime, oid, cid, 
payChannel, deviceType, phone, pageSize, startIndex); 
  
// 总记录数 
Long totalCount = ogInfoCount(info); 
  
if (totalCount == null) { 
totalCount = 0L; 
} 
  
List list = ogInfo(info); 
  
Map result = new HashMap(); 
  
("success", true); 
("data", list); 
("error", ""); 
("totalRecords", totalCount); 
return result; 
} 
  
4、问题解决

本文标签： 出错 解决 序列化 问题

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