importcom.fasterxml.jackson.databind.ObjectMapper;publicclassJsonToObjectConverter{publicstatic<T>Tconvert(StringjsonString,Class<T>clazz)throwsException{ObjectMapperobjectMapper=newObjectMapper();returnobjectMapper.readValue(jsonString,clazz);}}publicclassMain{publicstaticvoidmain(String[]args)throwsException{String...
接下来,使用Jackson库将Map转成JSON字符串的代码如下: importcom.fasterxml.jackson.core.JsonProcessingException;importcom.fasterxml.jackson.databind.ObjectMapper;publicclassMapToStringConverter{publicstaticStringconvertMapToString(Map<String,Object>map)throwsJsonProcessingException{ObjectMapperobjectMapper=newObjectMapper(...
这是 Jackson JSON (2.8.4) 的代码。 Map<String, String> result; ObjectMapper mapper; TypeFactory factory; MapType type; factory = TypeFactory.defaultInstance(); type = factory.constructMapType(HashMap.class, String.class, String.class); mapper = new ObjectMapper(); result = mapper.readValue(...
1. JSON String to Map package com.inspur.trc.util; import java.util.HashMap; import java.util.Map; import com.fasterxml.jackson.core.type.TypeReference; import com.fasterxml.jackson.databind.ObjectMapper; public class Json2Map { public static void main(String[] args) { String json = "{\"n...
private String name; } 2.使用Jackson Jackson是一个多用途的库,非常好地支持不同类型的转换,如JSON或XML。Jackson还支持使用以下方式将对象转换为Map: 2.1. 使用ObjectMapper.convertValue() convertValue()方法从给定值转换为给定值类型的实例进行两步转换。它首先将给定值序列化为JSON,然后将JSON数据绑定到给定类型...
1. JSON String to Map package com.inspur.trc.util; import java.util.HashMap; import java.util.Map; import com.fasterxml.jackson.core.type.TypeReference; import com.fasterxml.jackson.databind.ObjectMapper; public class Json2Map { public static void main(String[] args) { ...
下面的示例展示了如何使用Jackson将一个Java对象(employee)转换为一个Map: @Test public void givenJavaObject_whenUsingJackson_thenConvertToMap() { ObjectMapper objectMapper = new ObjectMapper(); Map<String, Object> map = objectMapper .convertValue(employee, new TypeReference<Map<String, Object>>() {})...
big enough to prevent resizingfor(Map.Entry<String,JsonNode>e:intermediateMap.entrySet()){String ...
Bean转为Map Person person = new Person(); person.setAge(18); person.setOpenid("123456"); person.setName("一安"); person.setSubName("公众号"); System.out.println(bean2Map(person)); System.out.println(bean2Map2(person)); public static Map<String, Object> bean2Map(Object object) {...
map.put(field.getName(), value); } }); return map; } public static Map<String, Object> bean2Map2(Object object) { Map<String, Object> map = new HashMap<>(); Class<?> clazz = object.getClass(); Field[] fields = clazz.getDeclaredFields(); ...