首先需要将JSON字符串转换成JSONObject对象,以便后续转换为Class对象。 // 创建JSONObject对象JSONObjectjsonObj=newJSONObject(jsonString); 1. 2. 3. 将JSONObject转换为Class对象 使用Gson库将JSONObject对象转换为Class对象。 // 将JSONObject转换为Class对象YourClassyourClass=newGson().fromJson(jsonObj.toString...
publicclassTestUserConverter{publicstaticvoidmain(String[]args){// 创建 JSON 对象StringjsonString="{\"name\":\"\",\"age\":25}";// 示例中的 name 为空字符串JSONObjectjsonObject=newJSONObject(jsonString);// 转换为 User 对象Useruser=UserConverter.convertJsonToUser(jsonObject);// 打印结果Syst...
1 public class JSON2JavaTest{ 2 public static void main(String[] args) { 3 Student stu = new Student("公众号BiggerBoy", "m", 2); 4 5 //Java对象转换成JSON字符串 或者JSON.toJSONString(stu); JSONObject继承了JSON 6 String stuString = JSONObject.toJSONString(stu); 7 System.out.print...
compile 'com.alibaba:fastjson:1.2.31' compile 'com.alibaba:fastjson:1.1.57.android' 有如下json字符串和类: String t2 = "{\"state\":2,\"msg\":\"msg2222\",\"data\":{}}"; public static class Test { public int state; public String msg; public List<Da...
This returns a system- or user-supplied default if the requested name has no value or if the value cannot be coerced to the requested type. </ul> <strong>Warning:</strong> this class represents null in two incompatible ways: the standard Java null reference, and the sentinel value JSON...
List<Map<String, Object>> list = JSON.parseArray(jsonObject.getJSONArray("fruits").toJSONString(), Map.class); 通过上面的代码示例可以轻松地将Json字符串转换为List对象集合。需要注意的是,这里使用了阿里巴巴的fastjson库,如果需要进行转换则需要在项目中引入该库。
ClassCastException- if the value to which the specified name is mapped is not assignable to JsonObject type getJsonNumber JsonNumbergetJsonNumber(Stringname) Returns the number value to which the specified name is mapped. This is a convenience method for(JsonNumber)get(name)to get the value....
com.alibaba.fastjson.JSONException: can not cast to : java.util.Set<java.lang.String> 具体 case import java.util.HashSet; import java.util.Set; import org.junit.Test; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONObject...
Writer write(Writer writer) Write the contents of the JSONObject as JSON text to a writer. Writer write(Writer writer, int indentFactor) Methods inherited from class java.lang.Object clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitField...
This returns a system- or user-supplied default if the requested name has no value or if the value cannot be coerced to the requested type. </ul> <strong>Warning:</strong> this class represents null in two incompatible ways: the standard Java null reference, and the sentinel value JSON...