Java中Json转Map方法

Java用JSONObject.toBean进行json字符串转换成Map集合

转换实例一

public void readJSON2Map() {

try {

fail("==============JSON Arry String >>> Java Map ==================");

json = "{\"arr\":[\"a\",\"b\"],\"A\":{\"address\":\"address\",\"birthday\":{\"birthday\":\"2010-11-22\"}," + "\"email\":\"email\",\"id\":1,\"name\":\"jack\"},\"int\":1," + "\"B\":{\"address\":\"address\",\"birthday\":{\"birthday\":\"2010-11-22\"}," + "\"email\":\"email\",\"id\":1,\"name\":\"jack\"},\"name\":\"json\",\"bool\":true}";

jsonObject = JSONObject.fromObject(json);

Map < String,Class < ?>>clazzMap = new HashMap < String, Class < ?>>();

clazzMap.put("arr", String[].class);

clazzMap.put("A", Student.class);

clazzMap.put("B", Student.class);

Map < String,?>mapBean = (Map) JSONObject.toBean(jsonObject, Map.class, clazzMap);

System.out.println(mapBean);

Set < String > set = mapBean.keySet();

Iterator < String > iter = set.iterator();

while (iter.hasNext()) {

String key = iter.next();

fail(key + ":" + mapBean.get(key).toString());

}

} catch(Exception e) {

e.printStackTrace();

}

}

执行结果：

==============JSON Arry String >>> Java Map ==================

{A=jack#1#address#2010-11-22#email, arr=[a, b], B=jack#1#address#2010-11-22#email, int=1, name=json, bool=true}

A:jack#1#address#2010-11-22#email

arr:[a, b]

B:jack#1#address#2010-11-22#email

int:1

name:json

bool:true

转换实例二

public void json2map() {

String json1 = "{'arr':['a','b'],'int':1,'name':'json','bool':true}";

JSONObject jsonObject1 = JSONObject.fromObject(json1);

Map typeMap1 = new HashMap();

typeMap1.put("arr", String[].class);

typeMap1.put("int", Integer.class);

typeMap1.put("name", String.class);

typeMap1.put("bool", Boolean.class);

Map output1 = (Map) JSONObject.toBean(jsonObject1, Map.class, typeMap1);

System.out.println("Map");

System.out.println(output1.size());

System.out.println(output1.get("name"));

System.out.println(output1.get("arr"));

String json2 = "{'k1':{'age':10,'sex':'男','userName':'xiapi1'},'k2':{'age':12,'sex':'女','userName':'xiapi2'}}";

JSONObject jsonObject2 = JSONObject.fromObject(json2);

Map < String,Class < ?>>typeMap2 = new HashMap < String,Class < ?>>();

Map < String,Student > output2 = (Map < String, Student > ) JSONObject.toBean(jsonObject2, Map.class, typeMap2);

System.out.println("Map");

System.out.println(output2.size());

System.out.println(output2.get("k1"));

}

执行结果：

Map

4

json

[a, b]

Map

2

net.sf.ezmorph.bean.MorphDynaBean@5b8827[{sex=男, age=10, userName=xiapi1}]

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