fastJson中常用JSON字符串和Java对象互转

<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.54</version>
</dependency>

/** * JSON->Java Bean */ @Test public void test1(){ Person person = new Person().setId("1").setName("fastJson").setAge(1); String jsonString = JSON.toJSONString(person); System.out.println(jsonString);
 //传入字节码，调用parSEObject Person person1 = JSON.parSEObject(jsonString,Person.class); System.out.println(person1); }

/** * JSON->List Java Bean */ @Test public void test2(){ List<Person> list = Arrays.asList(new Person().setId("1").setName("fastJson1").setAge(1),new Person().setId("2").setName("fastJson2").setAge(2),new Person().setId("3").setName("fastJson3").setAge(3)); String jsonString = JSON.toJSONString(list); System.out.println(jsonString);
 //传入字节码，调用parseArray List<Person> person1 = JSON.parseArray(jsonString,courier; font-size: 16px'>4.JSON String to List String
 
 
 
/** * JSON->List String */ @Test public void test3(){ List<String> list = Arrays.asList("hello","world","hello world"); String jsonString = JSON.toJSONString(list); System.out.println(jsonString);
　　 //?new TypeReference<List<String>>() {} List<String> list1 = JSON.parSEObject(jsonString,new TypeReference<List<String>>() {}); System.out.println(list1); }
 
 
5.JSON String to?List<Map<String,Object>>
 
 
 
/** * JSON->List<Map<String,Object>> */ @Test public void test4(){ List<Map<String,Object>> list = new ArrayList<>(); Map<String,Object> map = new HashMap<>(); map.put("key1","value1"); map.put("key2","value2"); list.add(map); Map<String,Object> map1 = new HashMap<>(); map1.put("key11","value11"); map1.put("key22","value22"); list.add(map1); Map<String,Object> map2 = new HashMap<>(); map2.put("key111","value111"); map2.put("key222","value222"); list.add(map2); String jsonString = JSON.toJSONString(list); System.out.println(jsonString);
　　// new TypeReference<T> List<Map<String,Object>> maps = JSON.parSEObject(jsonString,new TypeReference<List<Map<String,Object>>>() {}); System.out.println(maps); }