json - 使用 Jackson 将列表转换为 json

Question

使用以下代码，我已将列表转换为 json，但格式为
如下:

{"GodownMaster":[{"pname":"FCI CHARLAPALLI","pcode":"16042"},
{"pname":"MLS CIRCLE 1 L.B. NAGAR","pcode":"16016"},{"pname":"MLS CIRCLE 4 
AZAMABAD","pcode":"16003"},{"pname":"MLS CIRCLE 6 
VIDYANAGAR","pcode":"16005"},{"pname":"OTHERS","pcode":"1699"}]} 

但我想将其转换为:

[{"pname":"FCI CHARLAPALLI","pcode":"16042"},
{"pname":"MLS CIRCLE 1 L.B. NAGAR","pcode":"16016"},{"pname":"MLS CIRCLE 4 
AZAMABAD","pcode":"16003"},{"pname":"MLS CIRCLE 6 
VIDYANAGAR","pcode":"16005"},{"pname":"OTHERS","pcode":"1699"}] 

下面是我的 Spring Controller :

@RequestMapping("/getGodowns")
public @ResponseBody Map 
getGodownsBasedOnDistrict(@RequestParam(value="district_code") String 
dist_code) {

List<CscGodownBean> godown_list = null;
Map<String, List<CscGodownBean>> m = new HashMap();
String exception = null;
try
{
//getting name and codes here
godown_list = scm_service.getGodownListBesedOnDistCode(dist_code);
}catch(Exception ex)
{
ex.printStackTrace();
exception = ex.getMessage();
}

if(godown_list!=null) {
for(int i=0;i<godown_list.size();i++) {
m.put("GodownMaster",godown_list);
}
}
return m;
}

Answer 1

你为什么要把你的名单放到Map ?代码看起来很奇怪。如果你想返回一个列表，就这样做:

@RequestMapping("/getGodowns")
public @ResponseBody List<CscGodownBean> getGodownsBasedOnDistrict(@RequestParam(value="district_code") String dist_code) {
    List<CscGodownBean> godown_list = null;
    String exception = null;
    try {
        //getting name and codes here
        godown_list = scm_service.getGodownListBesedOnDistCode(dist_code);
    } catch (Exception ex) {
        ex.printStackTrace();
        exception = ex.getMessage();
    }
    return godown_list;
}