Java HTTP状态代码500是否表示rest错误代码未出现

我正在尝试通过RESTAPI使用HTTP PUT请求更新对象。我得到了不同的错误，比如400个，但现在在修改代码和标题后，我得到了500个，这意味着

 Internal Error 500 : The server encountered an unexpected 
 condition which prevented it from fulfilling the request. 

这是否意味着我不必担心以下错误，即操作已被授权，方法未被禁止等

• 未经授权的401
• 付款要求402
• 禁止403
• 找不到404

p、 我正在使用JSON

String json = "my json string with escape characters"
String st= "username:password";
byte[] encoded = Base64.encodeBase64(st.getBytes());           
String credentials = new String(encoded);
String url= "http://localhost:10108/grc/api/contents/20081";

URL object=new URL(url);
HttpURLConnection con = (HttpURLConnection) object.openConnection();

con.setDoOutput(true);
con.setDoInput(true);
con.setRequestProperty("Content-Type", "application/json");
con.setRequestProperty("Accept","application/json");
con.setRequestProperty  ("Authorization", "Basic " + credentials);  

con.setRequestMethod("PUT");

JSONObject jsonObject = (JSONObject)new JSONParser().parse(json);

OutputStream os = con.getOutputStream();
os.write(jsonObject.toJSONString().getBytes());
os.flush();

int responseCode = con.getResponseCode();

我的原始JSON如下

{
    "name": "Decommisioned CBU One",
    "id": "2116",   
    "description": "Decommisioned CBU One",
    "parentFolderId": "2115",
    "fields": {
        "field": [{
            "dataType": "ID_TYPE",
            "id": "29",
            "name": "Resource ID",
            "value": "2116"
        }, {
            "dataType": "STRING_TYPE",
            "id": "63",
            "name": "Comment"
        }, {
            "dataType": "INTEGER_TYPE",
            "id": "60",
            "name": "Created By",
            "value": 6
        }, {
            "dataType": "DATE_TYPE",
            "id": "59",
            "name": "Creation Date",
            "value": "2015-02-04T20:23:26.000+05:00"
        }, {
            "dataType": "STRING_TYPE",
            "id": "57",
            "name": "Description",
            "value": "Decommisioned CBU One"
        }, {
            "dataType": "DATE_TYPE",
            "id": "61",
            "name": "Last Modification Date",
            "value": "2015-02-04T20:23:26.000+05:00"
        }, {
            "dataType": "INTEGER_TYPE",
            "id": "62",
            "name": "Last Modified By",
            "value": 6
        }, {
            "dataType": "STRING_TYPE",
            "id": "58",
            "name": "Location",
            "value": "/_op_sox/Project/Default/BusinessEntity/Emirates NBD PJSC/Emirates NBD Bank/Wholesale Banking/(Decommissioned) Corporate Banking/Decommisioned CBU One/Decommisioned CBU One.txt"
        }, {
            "dataType": "STRING_TYPE",
            "id": "56",
            "name": "Name",
            "value": "Decommisioned CBU One.txt"
        }, {
            "dataType": "STRING_TYPE",
            "id": "66",
            "name": "Orphan"
        }, {
            "dataType": "STRING_TYPE",
            "id": "125",
            "name": "OPSS-BusEnt:Business Entity Chart",
            "value": "${\"labelKey\" : \"label.hierarchyDiagram.url\",   \"path\" : \"/visualization/VizRenderer.jsp\",   \"modes\" : [\"view\", \"edit\"],\n     \"parameters\" :{\"oid\" : \"$objectId\",\"viz\" : \"EntityHierarchy\"},\n     \"popUp\" : {       \"windowAttributes\" : \"height=800,width=1000,menubar=no,status=no,toolbar=no,scrollbars=yes,resizable=yes,name=_blank\"\n     }\n     }"
        }, {
            "dataType": "STRING_TYPE",
            "id": "124",
            "name": "OPSS-BusEnt:Compliance Owner"
        }, {
            "dataType": "ENUM_TYPE",
            "id": "121",
            "name": "OPSS-BusEnt:Entity Type",
            "enumValue": {
                "id": "229",
                "name": "Business",
                "localizedLabel": "Business",
                "index": 2,
                "hidden": false
            }
        }, {
            "dataType": "STRING_TYPE",
            "id": "123",
            "name": "OPSS-BusEnt:Executive Owner"
        }, {
            "dataType": "ENUM_TYPE",
            "id": "133",
            "name": "OPSS-BusEnt:In RCSA Scope",
            "enumValue": {
                "id": "227",
                "name": "No",
                "localizedLabel": "No",
                "index": 2,
                "hidden": false
            }
        }, {
            "dataType": "MULTI_VALUE_ENUM",
            "id": "122",
            "name": "OPSS-BusEnt:In Scope"
        }, {
            "dataType": "STRING_TYPE",
            "id": "126",
            "name": "OPSS-BusEnt:Logo URL"
        }, {
            "dataType": "CURRENCY_TYPE",
            "id": "132",
            "name": "OPSS-BusEnt:Risk Appetite",
            "baseAmount": 0.0,
            "localAmount": 0.0
        }]
    },
    "typeDefinitionId": "6",
    "primaryParentId": "2112"
}

在删除linbreaks并使用转义序列之后，剩下的是作为JSON使用的以下字符串

{ \"name\": \"Decommisioned CBU One\", \"id\": \"2116\", \"description\": \"Decommisioned CBU One\", \"parentFolderId\": \"2115\", \"fields\": { \"field\": [{ \"dataType\": \"ID_TYPE\", \"id\": \"29\", \"name\": \"Resource ID\", \"value\": \"2116\" }, { \"dataType\": \"STRING_TYPE\", \"id\": \"63\", \"name\": \"Comment\" }, { \"dataType\": \"INTEGER_TYPE\", \"id\": \"60\", \"name\": \"Created By\", \"value\": 6 }, { \"dataType\": \"DATE_TYPE\", \"id\": \"59\", \"name\": \"Creation Date\", \"value\": \"2015-02-04T20:23:26.000+05:00\" }, { \"dataType\": \"STRING_TYPE\", \"id\": \"57\", \"name\": \"Description\", \"value\": \"Decommisioned CBU One\" }, { \"dataType\": \"DATE_TYPE\", \"id\": \"61\", \"name\": \"Last Modification Date\", \"value\": \"2015-02-04T20:23:26.000+05:00\" }, { \"dataType\": \"INTEGER_TYPE\", \"id\": \"62\", \"name\": \"Last Modified By\", \"value\": 6 }, { \"dataType\": \"STRING_TYPE\", \"id\": \"58\", \"name\": \"Location\", \"value\": \"/_op_sox/Project/Default/BusinessEntity/Emirates NBD PJSC/Emirates NBD Bank/Wholesale Banking/(Decommissioned) Corporate Banking/Decommisioned CBU One/Decommisioned CBU One.txt\" }, { \"dataType\": \"STRING_TYPE\", \"id\": \"56\", \"name\": \"Name\", \"value\": \"Decommisioned CBU One.txt\" }, { \"dataType\": \"STRING_TYPE\", \"id\": \"66\", \"name\": \"Orphan\" }, { \"dataType\": \"STRING_TYPE\", \"id\": \"125\", \"name\": \"OPSS-BusEnt:Business Entity Chart\", \"value\": \"${\\"labelKey\\" : \\"label.hierarchyDiagram.url\\", \\"path\\" : \\"/visualization/VizRenderer.jsp\\", \\"modes\\" : [\\"view\\", \\"edit\\"],\n \\"parameters\\" :{\\"oid\\" : \\"$objectId\\",\\"viz\\" : \\"EntityHierarchy\\"},\n \\"popUp\\" : { \\"windowAttributes\\" : \\"height=800,width=1000,menubar=no,status=no,toolbar=no,scrollbars=yes,resizable=yes,name=_blank\\"\n }\n }\" }, { \"dataType\": \"STRING_TYPE\", \"id\": \"124\", \"name\": \"OPSS-BusEnt:Compliance Owner\" }, { \"dataType\": \"ENUM_TYPE\", \"id\": \"121\", \"name\": \"OPSS-BusEnt:Entity Type\", \"enumValue\": { \"id\": \"229\", \"name\": \"Business\", \"localizedLabel\": \"Business\", \"index\": 2, \"hidden\": false } }, { \"dataType\": \"STRING_TYPE\", \"id\": \"123\", \"name\": \"OPSS-BusEnt:Executive Owner\" }, { \"dataType\": \"ENUM_TYPE\", \"id\": \"133\", \"name\": \"OPSS-BusEnt:In RCSA Scope\", \"enumValue\": { \"id\": \"227\", \"name\": \"No\", \"localizedLabel\": \"No\", \"index\": 2, \"hidden\": false } }, { \"dataType\": \"MULTI_VALUE_ENUM\", \"id\": \"122\", \"name\": \"OPSS-BusEnt:In Scope\" }, { \"dataType\": \"STRING_TYPE\", \"id\": \"126\", \"name\": \"OPSS-BusEnt:Logo URL\" }, { \"dataType\": \"CURRENCY_TYPE\", \"id\": \"132\", \"name\": \"OPSS-BusEnt:Risk Appetite\", \"baseAmount\": 0.0, \"localAmount\": 0.0 }] }, \"typeDefinitionId\": \"6\", \"primaryParentId\": \"2112\" }

---

最终，由服务器决定返回什么状态代码，但5xx状态代码（与4xx状态代码相反）的标准含义是服务器端出现了错误（如服务器执行空引用或其他严重错误），然而，4xx状态代码意味着发送的客户端/请求有问题。

不幸的是，HTTP status 500实际上只是服务器上意外错误的总括。错误可能在任何地方，甚至在身份验证代码中。因此，有可能在发出401响应之前，电话就中断了

在一个完美的世界中，500个响应不会发生，因为开发人员将捕获所有可能的错误并返回有用的响应

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一个服务所有者应该对500个错误感兴趣和关心，而一个客户端不应该导致这些错误（一个确定的客户端可以使用它们来完成服务）。接下来要做的最好的事情是联系服务所有者，让他们在日志中查找错误的原因

“error500”仅仅意味着，无论发生什么错误，您都需要在服务器端对其进行调试。从服务器和/或REST应用程序的错误日志开始。如果您收到500个错误，这意味着服务器接受了您发送的请求，但服务器端发生了一些事情，还有一件事情可能是由于数据无效或数据丢失而发生的