gson | 易学教程

SpringMVC- ajax以及HttpMessageConverter应用

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一.ajax功能 SpringMVC快速的完成ajax功能？ 1）返回数据是json就可以了。 2）页面$.ajax{}；原生的Java Web: 1）导入GSON 2）返回的数据将GSON转成json 3）写出去 1.1 ajax 获取所有员工 1)导包 jackson-annotations-2.1.5.jar jackson-core-2.1.5.jar jackson-databind-2.1.5.jar 2）编写目标方法，使其返回JSON对应的对象或集合。 package com.test.controller; import java.util.Collection; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import com.test.bean.Employee; import com.test.dao.EmployeeDao;

How to register custom TypeAdapter or JsonDeserializer with Gson in Retrofit?

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问题 I am using Retrofit in my project and I need some custom deserialization with some of the responses that the API I use returns. Just for an example: I receive JSON like: { "status": "7 rows processed" } ( will be "0 rows processed" if request failed ) and I need to deserialize to an object like: @Getter @RequiredArgsConstructor public static class Result { private final boolean success; } I have created custom deserializer: public class ResultDeserializer implements JsonDeserializer<Result> {

82.EasyUI的DataGrid

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表里的数据是通过 Servlet 调用 DAO 从数据库里获得，再通过 GSON 架包转成 JSON 字符串在页面上直接请求该 Servlet 既可以获得数据并放入 DataGrid 中注意：这里的 field 中的值就是 Json 字符串的 key 的值。来源： CSDN 作者：爱妮三千遍链接： https://blog.csdn.net/ketouch/article/details/104167714

Google Gson-反序列化列表宾语？（通用类型）

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我想通过Google Gson 传输列表对象，但是我不知道如何反序列化泛型类型。在查看此内容后我尝试了什么（BalusC的答案）： MyClass mc = new Gson().from Json (result, new List<MyClass>(){}.getClass()); 但是后来我在日食中遇到了一个错误，说“新的List（）{}类型必须实现继承的抽象方法...”，如果我使用快速修复方法，则会得到20个以上的方法存根的怪物。我很确定有一个更简单的解决方案，但是我似乎找不到它！编辑：我现在有 Type listType = new TypeToken<List<MyClass>>() { }.getType(); MyClass mc = new Gson().fromJson(result, listType); 但是，在“ fromJson”行中确实得到以下异常： java.lang.NullPointerException at org.apache.harmony.luni.lang.reflect.ListOfTypes.length(ListOfTypes.java:47) at org.apache.harmony.luni.lang.reflect.ImplForType.toString(ImplForType.java:83) at

Gson/JSON学习

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一、gson使用 1.添加gson的jar包，方法链接为： https://blog.csdn.net/weixin_43145371/article/details/86666246 这步操作之后就可以进行Gson的使用了，下步链接中的添加依赖就不用了。 2.gson学习内容： https://blog.csdn.net/huplion/article/details/78984977 提取出来的知识点： JSON是一种轻量级的数据交换格式；常见的两种数据结构：“键/值”对，数组；解析JSON的第三方类库中目前最常用的有：Gson，Jackson，org.json，fastjson； toJson()可以将Java对象序列化为JSON字符串； fromJson()可以将json字符串反序列化(解析)为匹配的java对象；代码示例： package smy; public class MyStar { private int age = 30; private String name = "朱一龙"; } package smy; import com.google.gson.Gson; import com.google.gson.reflect.TypeToken; import java.lang.reflect.Type; import java.util

How to retrieve specific data from json array via retrofit2 using gson parsing

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问题 Here is the JSON response from a server (which i cannot change the structure of) My issues are as follows: 1. The data changes based on the query so sometimes the Primary posts & Secondary Posts are an array and sometimes they are an object/ string. How would i go about retrieving a value from Address without getting the whole structure? Eg. only retrieve Email & post code strings from MainAddress only retrieve Address1 from Website & Twitter { "Members": { "Member": { "@First_Id": "000", "

Is there an easy way to make Gson skip a field if there's an error deserializing it?

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问题 I'm trying to deserialize some data with Gson (Java) and the API I'm pulling data from sometimes has data of the wrong type in a field. I.e. if I'm expecting an array of String types, it might encounter a Boolean . Now I realize these are my current options: Always ignore the field from deserialization Create a custom TypeAdapter to do the deserialization and the catch the error and do something (like set the field to null ) However I'm asking if there's another way to easily make it so if

Creating JSON-LD using GSON

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问题 I'm trying to read/write JSON-LD documents using Gson. An example of JSON-LD: { "@context": { "name": "http://xmlns.com/foaf/0.1/name", "homepage": { "@id": "http://xmlns.com/foaf/0.1/workplaceHomepage", "@type": "@id" }, "Person": "http://xmlns.com/foaf/0.1/Person" }, "@id": "http://me.markus-lanthaler.com", "@type": "Person", "name": "Markus Lanthaler", "homepage": "http://www.tugraz.at/" } The problem I have with Gson is adding the @ to the beginning of some of the fields. I tried using

Creating JSON-LD using GSON

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Gson.toJson returns null, ProGuard issue

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问题 users Bug report shows Gson().toJson(obj) occasionally returns {} but for most users it works correct. i have visited an user who faced the bug and debugged app on his phone and i made Toast to show what is sending to server and i saw Toast shows {} and also Records and ID aren't null . here is what i have done. private class ClassA{ String ID; ArrayList<ClassB> Records; ClassA(String ID, ArrayList<ClassB> Records) { this.ID= ID; this.Records= Records; } } private class ClassB { int T; int F;