The toolkit is a lightweight, JSON construction and parsing toolkit under JAVA, which also contains JSON conversions with XML, HTTP headers, cookies, and CDL.
Recommended to use here: Alibaba FastJson is a Json processing toolkit, including "serialization" and "deserialization". It has the following characteristics:
The fastest speed, tests show that fastjson has extremely fast performance, surpassing any other Java Json parser. Including JackJson, who claims to be the fastest;
Powerful, fully supports Java Bean, Collection, Map, Date, Enum, supports paradigm, supports introspection; has no dependencies, can be run directly on Java SE 5.0 or above; supports Android; open source (Apache 2.0)
Source code address:
/alibaba/fastjson
The Fastjson API entry class is that common serialization operations can be directly completed by static methods on the JSON class.
public static final Object parse(String text); // parse the JSON text as JSONObject or JSONArray
public static final JSONObject parseObject(String text); // parse JSON text into JSONObject
public static final T parseObject(String text, Class clazz); // parse JSON text as JavaBean
public static final JSONArray parseArray(String text); // parse JSON text into JSONArray
public static final List parseArray(String text, Class clazz); //parse JSON text into JavaBean collection
public static final String toJSONString(Object object); // Serialize JavaBeans into JSON text
public static final String toJSONString(Object object, boolean prettyFormat); // Serialize JavaBeans into formatted JSON text
public static final Object to JSON(Object javaObject); Convert JavaBean to JSONObject or JSONArray.
The above are common methods in some projects.
Here is the code you practice writing:
package ;
public class TestPerson {
private int age;
private String name;
public TestPerson(){
}
public TestPerson(int age,String name){
=age;
=name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
= age;
}
public String getName() {
return name;
}
public void setName(String name) {
= name;
}
}
package ;
import .*;
import .*;
public final class TestFastJson {
public static void main(String[] args) {
// TODO Auto-generated method stub
TestPerson json = new TestPerson(19,"Li Ming");
List<TestPerson> list = new ArrayList<TestPerson>();
(json);
(new TestPerson(12,"Zhang San"));
//Serialize collection or object into JSON
((json));
( (list) );
//Json string deserializes it into an object
TestPerson person = ("{\"name\":\"Li Ming\",\"age\":19}", );
("name:%s,age:%d\n",(),());
String str = "[{\"name\":\"Li Ming\",\"age\":19},{\"name\":\"Zhang San\",\"age\":12}]";
//Deserialize the array object into a collection
List<TestPerson> listPerson = (str,);
for(TestPerson item : listPerson){
( () );
( ());
}
//No object to directly parse JSON objects
JSONObject jobj = ("{\"name\":\"Li Ming\",\"age\":19}");
("name:%s,age:%d\n",("name"),("age"));
//Didn't have an object to directly parse the JSON array
JSONArray jarr = ("[{\"name\":\"Li Ming\",\"age\":19},{\"name\":\"Zhang San\",\"age\":12}]");
for(int i=0,len=();i<len;i++){
JSONObject temp= (i);
("name:%s,age:%d\n",("name"),("age"));
}
for(Object obj:jarr){
(());
}
}
}