php array 转json java 转 json数据格式

$arr = array(
"demo1" => "my demo1",
"demo2" => array(
"demo2_demo1"=>"aaaaaaaa",
"demo2_demo2"=>"bbbbbbbb",
"demo2_demo3"=>array(
"demo2_demo3_demo1"=>"ccccccc"
)
),
"demo3" => 22
);

$json_str = json_ecnode($arr,true);
$arr = json_decode($json_str,true);
var_dump($json_str);
var_dump($arr);
//查看结果

commons-beanutils-1.8.3.jar,
commons-collections-3.2.1.jar,
commons-lang-2.6.jar,
commons-logging-1.1.1.jar,
ezmorph-1.0.6.jar,
json-lib-2.4-jdk15.jar,

package Main;

import net.sf.json.JSONObject;
import net.sf.json.JSONArray;

import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;

import Main.Demo1;

public class Index
{

public static void main(String[] args)
{
index4();
}

/**
* 简单的simple
* */
public static void index1()
{
JSONObject json = new JSONObject();

json.element("name","谭勇");
json.element("age",22);

System.out.println(json.toString());
}

/**
* Map 数据转json
* */
public static void index2()
{
JSONObject json = new JSONObject();

Map<String,String> map = new HashMap<String,String>();

map.put("name", "谭勇");
map.put("age", "22");

json.accumulateAll(map);

System.out.println(json.toString());

}

/**
* List<Map> 转json
* */
public static void index3()
{
JSONArray arr = new JSONArray();

List<Map<String,String>> list = new ArrayList<Map<String,String>>();

list.add(getMap("name","谭勇"));
list.add(getMap("age","22"));

arr.addAll(list);

System.out.println(arr.toString());
}

/**
* 对象转Json
* */
public static void index4()
{
Demo1 demo1 = new Demo1();

demo1.setName("谭勇");
demo1.setAge(22);

JSONObject json = new JSONObject();
JSONArray arr = new JSONArray();

json.element("demo1",demo1);
arr.add(demo1);

//json.containsKey(demo1);

System.out.println(json.toString());
System.out.println(arr.toString());
}

private static Map<String,String> getMap(String key,String val)
{
Map<String,String> map = new HashMap<String,String>();

map.put(key, val);

return map;
}
}

package Main;

public class Demo1
{

private String name;

private int age;

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

public String getName()
{
return this.name;
}

public void setAge(int age)
{
this.age = age;
}

public int getAge()
{
return this.age;
}

}