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在Springboot中可以使用如上的包来做json的处理
对象转字符串
ObjectMapper mapper = new ObjectMapper();
Staff obj = new Staff();
//Object to JSON in file
mapper.writeValue(new File("c:\file.json"), obj);
//Object to JSON in String
String jsonInString = mapper.writeValueAsString(obj);
字符串转对象
ObjectMapper mapper = new ObjectMapper();
String jsonInString = "{'name' : 'mkyong'}";
//JSON from file to Object
Staff obj = mapper.readValue(new File("c:\file.json"), Staff.class);
//JSON from URL to Object
Staff obj = mapper.readValue(new URL("http://mkyong.com/api/staff.json"), Staff.class);
//JSON from String to Object
Staff obj = mapper.readValue(jsonInString, Staff.class);
字符串转数组对象
转数组：
MyClass[] myObjects = mapper.readValue(json, MyClass[].class);
转list
List<MyClass> myObjects = mapper.readValue(jsonInput, new TypeReference<List<MyClass>>(){});
转特殊list
List<MyClass> myObjects = mapper.readValue(jsonInput, mapper.getTypeFactory().constructCollectionType(List.class, MyClass.class));
