如何用Java构建json对象

柔情只为你懂 2022-11-19 11:28 198阅读 0赞

### 如何用Java构建json对象 ###

在使用java构建json之前,首先需要先明确json的概念:https://blog.csdn.net/qq\_35885488/article/details/80310062

啥是`JSONObject`,啥是`JSONArray`。

下面是两个例子:

json

{
        "RequestHead":{
            "BusiType":"LIS-WX000-02",
            "SaleChnl":"WX",
            "DataType":"03"
        },
        "RequestBody":{
            "AppntAge":"53",
            "AppntIDType":"0",
            "AppntIDNo":"430623196811027890",
            "BEContNo":"11111",
            "AppntSex":"男",
            "AppntBirthday":"1968-11-02",
            "AppntName":"张三",
            "RiskList":[
                {
                    "RiskCode":"001",
                    "Mult":"1",
                    "MainRiskCode":"001",
                    "PayIntv":"5",
                    "Prem":"100000",
                    "Amnt":"100000",
                    "InsuYearFlag":"Y",
                    "PayYear":"5",
                    "InsuYear":"10"
                }
            ]
        }
    }

javacode

JSONObject head = new JSONObject();
            head.put("BusiType", "LIS-WX000-02");
            head.put("SaleChnl", "WX");
            head.put("DataType", "03");
    
            JSONObject body = new JSONObject();
    
            body.put("BEContNo" , "11111");
            body.put("AppntName" , "张三");
            body.put("AppntSex" , "男");
            body.put("AppntBirthday" , "1968-11-02");
            body.put("AppntIDType" , "0");
            body.put("AppntIDNo" , "430623196811027890");
            body.put("AppntAge" , "53");
    
            JSONObject risk = new JSONObject();
    
    
            risk.put("MainRiskCode", "001");
            risk.put("RiskCode" , "001");
            risk.put("Prem" , "100000");
            risk.put("Amnt" , "100000");
            risk.put("Mult", "1");
            risk.put("PayIntv" , "5");
            risk.put("PayYear" , "5");
            risk.put("InsuYear" , "10");
            risk.put("InsuYearFlag" , "Y");
    
            JSONArray ar = new JSONArray();
            ar.add(risk);
    
            body.put("RiskList", ar);
    
            JSONObject req = new JSONObject();
            req.put("RequestHead", head);
            req.put("RequestBody", body);
    
           // System.out.println(req.toJSONString());
            
            LOGGER.debug(req.toJSONString());

json

{
        "insuredList":[
            {
                "insuredSex":0,
                "insuredAge":62,
                "riskInfoList":[
                    {
                        "planCodeInfoList":[
                            {
                                "insuYear":"5",
                                "payIntv":"0",
                                "dutyCode":"DPE131",
                                "payEndYear":"1000",
                                "prem":"200000"
                            }
                        ],
                        "riskcode":"PE13"
                    }
                ]
            }
        ]
    }

code

public static void paramJson(){ 
    
            JSONObject head = new JSONObject();
            head.put("dutyCode","DPE131");
            head.put("insuYear","5");
            head.put("payEndYear","1000");
            head.put("payIntv","0");
            head.put("prem","200000");
    
            JSONArray ar = new JSONArray();
            ar.add(head);
    
            JSONObject head1 = new JSONObject();
            head1.put("riskcode","PE13");
            head1.put("planCodeInfoList",ar);
    
    
            JSONObject head2 = new JSONObject();
            head2.put("insuredAge",62);
            head2.put("insuredSex",0);
            JSONArray ar3 = new JSONArray();
            ar3.add(head1);
            head2.put("riskInfoList",ar3);
    
            JSONArray ar1 = new JSONArray();
            ar1.add(head2);
            JSONObject head3 = new JSONObject();
            head3.put("insuredList",ar1);
            System.out.println(head3);
        }

这里使用的是`alibaba`的`fastjson`,记得引入依赖