[JSON] JSON-Lib: simple processing of converting a Java object into a JSON object

Thanks to JS's native support for JSON, JSON is widely used for data transmission in many projects. How can we convert data from a Java object to a JSON object? How can we convert the foreground JSON object to a Java object for processing?

This is a common problem in development.

JSON-lib is an open-source project of SourceForge. It is often used to solve the problem of Java JSON data conversion.

Is http://sourceforge.net/projects/json-lib/

However, some dependent packages are required for normal use.

Commons-beanutils-1.8.0.jar

Commons-collections-3.1.jar

Commons-logging-1.1.1.jar

Commons-logging-api-1.1.jar

Ezmorph-1.0.6.jar

Commons-lang-2.4.jar !! Jar of 3.x cannot be run.

Here are the packages

Because the doc on the official website cannot be opened, I read others' blogs.

Here are several small cases of JSON conversion in Java -".

Person. Java JavaBean Model

package com.lzz.json;public class Person {private int id;private String name;private String addr;public Person(){ }public Person(int id, String name, String addr) {super();this.id = id;this.name = name;this.addr = addr;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAddr() {return addr;}public void setAddr(String addr) {this.addr = addr;}}

Here are several operation cases

Simplejavatojson. Java

Package COM. lzz. JSON; import Java. util. arraylist; import Java. util. hashmap; import Java. util. list; import Java. util. map; import net. SF. JSON. jsonarray; import net. SF. JSON. jsonobject;/** ref http://ryxxlong.iteye.com/blog/583862 * JSON supports native js * using eval can be directly changed to JS object * JSON Java * string <=> JAVA. lang. string, Java. lang. character, char * number <=> JAVA. lang. number, byte, short, Int, long, float, double * true | false <=> JAVA. lang. boolean, Boolean * null <=> null * function <=> net. SF. JSON. jsonfunction * array <=> net. SF. JSON. jsonarray (object, String, number, Boolean, function) * object <=> net. SF. JSON. jsonobject */public class simplejavatojson {public static void main (string [] ARGs) {/* Set-type JSON object programmed from Java * // arrayjson (); // listjson (); // stringjson ();/* map-type processing */mapjson ();/* JavaBean Processing */beanjson ();} // Array Processing Public static void arrayjson () {string arr [] = {"lzz", "12", "ee"}; jsonarray jarr = jsonarray. fromobject (ARR); system. out. println (jarr);} // list public static void listjson () {list <string> List = new arraylist <string> (); list. add ("apple"); list. add ("orange"); list. add ("money"); jsonarray jlist = jsonarray. fromobject (list); system. out. println (jlist);} // string format the string must conform to the public static void stringjson () {string STR = "['A', 'B ', 'C', {d: 'A'}] "; jsonarray jarr = jsonarray. fromobject (STR); system. out. println (jarr);} // converts the map type to JSON format. The generated JSON object is also public static void mapjson () {map = new hashmap (); map. put ("name", "apple"); map. put ("Age", new INTEGER (20); map. put ("haoren", Boolean. true); map. put ("arr", new string [] {"A", "B", "C"}); jsonobject jobj = jsonobject. fromobject (MAP); system. out. println (jobj);} // convert the JSON format of Javabean to public static void beanjson () {person P = new person (101, "apple", "China "); jsonobject jobj = jsonobject. fromobject (p); system. out. println (jobj );}}