fastJSON的各种转换

利用阿里的fastjson包对对象进行 json的转化与解析，

常用类型

类型一：JavaBean

类型二：List<JavaBean>

类型三:List<String>

类型四:List<Map<String,Object>>

@H_403_17@将上面的四种数据对象转换成json字符串的方法都是一样的

String jsonString = JSON.toJSONString(obj);

方法/步骤

1. 1
  
  @H_403_17@将json字符串转化成JavaBean对象
  
  Person person = new Person("1","fastjson",1);
  
  //这里将javabean转化成json字符串
  
  String jsonString = JSON.toJSONString(person);
  
  //这里将json字符串转化成javabean对象,
  
  person =JSON.parSEObject(jsonString,Person.class);
  
  @H_403_17@
2. 2
  
  @H_403_17@将json字符串转化成List<JavaBean>对象
  
  Person person1 = new Person("1","fastjson1",1);
  
  Person person2 = new Person("2","fastjson2",2);
  
  List<Person> persons = new ArrayList<Person>();
  
  persons.add(person1);
  
  persons.add(person2);
  
  String jsonString = JSON.toJSONString(persons);
  
  System.out.println("json字符串:"+jsonString);
  
  //解析json字符串
  
  List<Person> persons2 = JSON.parseArray(jsonString,Person.class);
1. @H_403_17@将json字符串转化成List<String>对象
  
  List<String> list = new ArrayList<String>();
  
  list.add("fastjson1");
  
  list.add("fastjson2");
  
  list.add("fastjson3");
  
  String jsonString = JSON.toJSONString(list);
  
  System.out.println("json字符串:"+jsonString);
  
  //解析json字符串
  
  List<String> list2 = JSON.parSEObject(jsonString,new TypeReference<List<String>>(){});
  
  @H_403_17@
2. 4
  
  @H_403_17@将json字符串转化成List<Map<String,Object>>对象
  
  Map<String,Object> map = new HashMap<String,Object>();
  
  map.put("key1","value1");
  
  map.put("key2","value2");
  
  Map<String,Object> map2 = new HashMap<String,Object>();
  
  map2.put("key1",1);
  
  map2.put("key2",2);
  
  List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
  
  list.add(map);
  
  list.add(map2);
  
  String jsonString = JSON.toJSONString(list);
  
  System.out.println("json字符串:"+jsonString);
  
  //解析json字符串
  
  List<Map<String,Object>> list2 = JSON.parSEObject(jsonString,new TypeReference<List<Map<String,Object>>>(){});

原文链接：https://www.f2er.com/json/290067.html

fastJSON的各种转换

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