JSONOBJECT JSON与JAVA数据的转换

发布时间：2020-12-16 19:23:24 所属栏目：百科来源：网络整理

导读：JSON-lib这个Java类包用于把bean,map和XML转换成JSON并能够把JSON转回成bean和DynaBean。下载地址: http://json-lib.sourceforge.net/ 还要需要的第3方包: org.apache.commons(3.2以上版本) org.apache.oro net.sf.ezmorph(ezmorph-1.0.4.jar) nu.xom 1、Lis

JSON-lib这个Java类包用于把bean,map和XML转换成JSON并能够把JSON转回成bean和DynaBean。

下载地址: http://json-lib.sourceforge.net/
还要需要的第3方包:
org.apache.commons(3.2以上版本)
org.apache.oro
net.sf.ezmorph(ezmorph-1.0.4.jar)
nu.xom

1、List

Java代码

boolean[]boolArray=newboolean[]{true,false,true};
JSONArrayjsonArray1=JSONArray.fromObject(boolArray);
System.out.println(jsonArray1);
//prints[true,false,true]
Listlist=newArrayList();
list.add("first");
list.add("second");
JSONArrayjsonArray2=JSONArray.fromObject(list);
System.out.println(jsonArray2);
//prints["first","second"]
JSONArrayjsonArray3=JSONArray.fromObject("['json','is','easy']");
System.out.println(jsonArray3);
//prints["json","is","easy"]

Java代码

boolean[]boolArray=newboolean[]{true,"easy"]

2、Map

Java代码

Mapmap=newHashMap();
map.put("name","json");
map.put("bool",Boolean.TRUE);
map.put("int",newInteger(1));
map.put("arr",newString[]{"a","b"});
map.put("func","function(i){returnthis.arr[i];}");
JSONObjectjson=JSONObject.fromObject(map);
System.out.println(json);
//{"func":function(i){returnthis.arr[i];},"arr":["a","b"],"int":1,"name":"json","bool":true}

Java代码

Mapmap=newHashMap();
map.put("name","bool":true}

3、BEAN

Java代码

/**
*Bean.java
privateStringname="json";
privateintpojoId=1;
privatechar[]options=newchar[]{'a','f'};
privateStringfunc1="function(i){returnthis.options[i];}";
privateJSONFunctionfunc2=newJSONFunction(newString[]{"i"},"returnthis.options[i];");
*/
JSONObjectjsonObject=JSONObject.fromObject(newJsonBean());
System.out.println(jsonObject);
//{"func1":function(i){returnthis.options[i];},"pojoId":1,"options":["a","f"],"func2":function(i){returnthis.options[i];}}

Java代码

/**
*Bean.java
privateStringname="json";
privateintpojoId=1;
privatechar[]options=newchar[]{'a',"func2":function(i){returnthis.options[i];}}

4、BEANS

Java代码

/**
*privateintrow;
privateintcol;
privateStringvalue;
*
*/
Listlist=newArrayList();
JsonBean2jb1=newJsonBean2();
jb1.setCol(1);
jb1.setRow(1);
jb1.setValue("xx");
JsonBean2jb2=newJsonBean2();
jb2.setCol(2);
jb2.setRow(2);
jb2.setValue("");
list.add(jb1);
list.add(jb2);
JSONArrayja=JSONArray.fromObject(list);
System.out.println(ja.toString());
//[{"value":"xx","row":1,"col":1},{"value":"","row":2,"col":2}]

Java代码

/**
*privateintrow;
privateintcol;
privateStringvalue;
*
*/
Listlist=newArrayList();
JsonBean2jb1=newJsonBean2();
jb1.setCol(1);
jb1.setRow(1);
jb1.setValue("xx");
JsonBean2jb2=newJsonBean2();
jb2.setCol(2);
jb2.setRow(2);
jb2.setValue("");
list.add(jb1);
list.add(jb2);
JSONArrayja=JSONArray.fromObject(list);
System.out.println(ja.toString());
//[{"value":"xx","col":2}]

5、String to bean

Java代码

Stringjson="{name="json",bool:true,int:1,double:2.2,func:function(a){returna;},array:[1,2]}";
JSONObjectjsonObject=JSONObject.fromString(json);
Objectbean=JSONObject.toBean(jsonObject);
assertEquals(jsonObject.get("name"),PropertyUtils.getProperty(bean,"name"));
assertEquals(jsonObject.get("bool"),"bool"));
assertEquals(jsonObject.get("int"),"int"));
assertEquals(jsonObject.get("double"),"double"));
assertEquals(jsonObject.get("func"),"func"));
Listexpected=JSONArray.toList(jsonObject.getJSONArray("array"));
assertEquals(expected,(List)PropertyUtils.getProperty(bean,"array"));

Java代码

Stringjson="{name="json","array"));

Java代码

Stringjson="{"value":"xx","row":1,"col":1}";
JSONObjectjsonObject=JSONObject.fromString(json);
JsonBean2bean=(JsonBean2)JSONObject.toBean(jsonObject,JsonBean2.class);
assertEquals(jsonObject.get("col"),newInteger(bean.getCol()));
assertEquals(jsonObject.get("row"),newInteger(bean.getRow()));
assertEquals(jsonObject.get("value"),bean.getValue());

Java代码

Stringjson="{"value":"xx",bean.getValue());

6 json to xml 1) JSONObject json = new JSONObject( true ); String xml = XMLSerializer.write( json ); <o class="object" null="true"> 2) JSONObject json = JSONObject.fromObject("{"name":"json","bool":true,"int":1}"); String xml = XMLSerializer.write( json ); <o class="object"> <name type="string">json</name> <bool type="boolean">true</bool> <int type="number">1</int> </o> <o class="object"> <name type="string">json</name> <bool type="boolean">true</bool> <int type="number">1</int> </o> 3) JSONArray json = JSONArray.fromObject("[1,2,3]"); String xml = XMLSerializer.write( json ); <a class="array"> <e type="number">1</e> <e type="number">2</e> <e type="number">3</e> </a> 7 、xml to json <a class="array"> <e type="function" params="i,j"> return matrix[i][j]; </e> </a> <a class="array"> <e type="function" params="i,j"> return matrix[i][j]; </e> </a> JSONArray json = (JSONArray) XMLSerializer.read( xml ); System.out.println( json ); // prints [function(i,j){ return matrix[i][j]; }]

（编辑：李大同）

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