Json lib

 

Json_lib可以方便的将Java对象转成json格式的字符串，也可以将Java对象转换成xml格式的文档，同样可以将Json字符串转换成Java对象，或者将xml字符串转换成Java对象。

 

官网：http://json-lib.sourceforge.net/

JSON在线转换：http://json.parser.online.fr/

JSON教程：http://www.json.org/json-zh.html

官网上说明了json_lib还需要依赖的Jar包有：

JAR	网址
jakarta commons-lang 2.5	http://commons.apache.org/lang/download_lang.cgi
jakarta commons-beanutils 1.8.0	http://commons.apache.org/beanutils/download_beanutils.cgi
jakarta commons-collections 3.2.1	http://commons.apache.org/collections/download_collections.cgi
jakarta commons-logging 1.1.1	http://commons.apache.org/logging/download_logging.cgi
ezmorph 1.0.6	http://ezmorph.sourceforge.net/

注意这里如果jakarta commons-lang 使用3.1版本的会报：Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeException

所以这里还是使用2.6的吧

 

MyBean.java：

package com.iflytek.json;

import net.sf.json.JSONFunction;

/**
 * @author xudongwang 2012-1-15
 * 
 *         Email:[e-mail]
 */
public class MyBean {
	private String name = "json";
	private int pojoId = 1;
	private char[] options = new char[] { 'a', 'f' };
	private String func1 = "function(i){ return this.options[i]; }";
	private JSONFunction func2 = new JSONFunction(new String[] { "i" },
			"return this.options[i];");
	
	
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getPojoId() {
		return pojoId;
	}

	public void setPojoId(int pojoId) {
		this.pojoId = pojoId;
	}

	public char[] getOptions() {
		return options;
	}

	public void setOptions(char[] options) {
		this.options = options;
	}

	public String getFunc1() {
		return func1;
	}

	public void setFunc1(String func1) {
		this.func1 = func1;
	}

	public JSONFunction getFunc2() {
		return func2;
	}

	public void setFunc2(JSONFunction func2) {
		this.func2 = func2;
	}

}

 

 JsonlibTest.java：

package com.iflytek.json;

import java.lang.reflect.InvocationTargetException;
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;

import org.apache.commons.beanutils.PropertyUtils;

/**
 * @author xudongwang 2012-1-15
 * 
 *         Email:[e-mail]
 */
public class JsonlibTest {

	// JSONArray是将一个Java对象转换成json的Array格式,如['xdwang', 22]
	private JSONArray jsonArray = null;
	// JSONObject是将Java对象转换成一个json的Object形式,如{name:'xdwang', age: 22}
	private JSONObject jsonObject = null;

	public static void main(String[] args) {
		JsonlibTest json = new JsonlibTest();
		json.ArrayToJSON();
		json.ListToJSON();
		json.MapsToJSON();
		json.BeanToJSON();
		json.JSONToBean();
	}

	/**
	 * 数组转JSON操作
	 */
	public void ArrayToJSON() {
		boolean[] boolArray = new boolean[] { true, false, true };
		jsonArray = JSONArray.fromObject(boolArray);
		System.out.println("数组转JSON操作:" + jsonArray);
	}

	/**
	 * 集合转JSON操作
	 */
	public void ListToJSON() {
		List<String> list = new ArrayList<String>();
		list.add("first");
		list.add("second");
		jsonArray = JSONArray.fromObject(list);
		System.out.println("集合转JSON操作:" + jsonArray);
	}

	/**
	 * Maps转JSON操作
	 */
	public void MapsToJSON() {
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("name", "json");
		map.put("bool", Boolean.TRUE);
		map.put("int", new Integer(1));
		map.put("arr", new String[] { "a", "b" });
		map.put("func", "function(i){ return this.arr[i]; }");
		jsonObject = JSONObject.fromObject(map);
		System.out.println("Maps转JSON操作:" + jsonObject);
	}

	/**
	 * Bean转JSON操作
	 */
	public void BeanToJSON() {
		jsonObject = JSONObject.fromObject(new MyBean());
		System.out.println("Bean转JSON操作:" + jsonObject);
	}

	/**
	 * JSON转Bean操作
	 */
	public void JSONToBean() {
		try {
			String json = "{\"func1\":function(i){ return this.options[i]; },\"func2\":function(i){ return this.options[i]; },\"name\":\"json\",\"options\":[\"a\",\"f\"],\"pojoId\":1}";
			jsonObject = JSONObject.fromObject(json);
			Object bean = JSONObject.toBean(jsonObject);
			System.out.println("jsonStr:" + json);

			System.out.println("name:" + jsonObject.get("name"));
			System.out.println("name:"
					+ PropertyUtils.getProperty(bean, "name"));
			System.out.println("pojoId:" + jsonObject.get("pojoId"));
			System.out.println("pojoId:"
					+ PropertyUtils.getProperty(bean, "pojoId"));
			System.out.println("options:" + jsonObject.get("options"));
			System.out.println("options:"
					+ PropertyUtils.getProperty(bean, "options"));
			System.out.println("func1:" + jsonObject.get("func1"));
			System.out.println("func1:"
					+ PropertyUtils.getProperty(bean, "func1"));
			System.out.println("func2:" + jsonObject.get("func2"));
			System.out.println("func2:"
					+ PropertyUtils.getProperty(bean, "func2"));
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			e.printStackTrace();
		}
	}

}

  

 

这里就不描述xml的相关操作了，具体可以查看文档。