到 http://json-lib.sourceforge.net 下载 json-lib-1.1-jdk15.jar ,运行 json 还需要的包有: commons-lang.jar 、 commons-logging.jar , commons-beanutils.jar 、 xom-1.0-2005-01-05.jar 、 ezmorph-1.0.1.jar ,可在 http://www.docjar.com 搜索下载。
l 转化数组和集合
boolean[] boolArray = new boolean[]{true,false,true};
JSONArray jsonArray = JSONArray.fromObject(boolArray);
System.out.println(jsonArray);
输出: [true,false,true]
List list = new ArrayList();
list.add(“ 第一个 ”);
list.add(“ 第二个 ”);
JSONArray jsonArray = JSONArray.fromObject(list);
System.out.println(jsonArray);
输出: [“ 第一个 ”, “ 第二个 ”]
JSONArray jsonArray3 = JSONArray.fromObject("['json','is','easy']");
System.out.println(jsonArray3);
输出: [“json”, “is”, “'easy'”]
l 转化对象
转化 Map
Map map = new HashMap();
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 json = JSONObject.fromObject(map);
System.out.println(json);
输出: [“name”: “json”, “bool”:true, “int”,1, “arr”:[ “a”, “b”], “func”:function(i){return this.arr[i];}]
转化 Bean
MyBean.java
public class MyBean {
private String name = "json";
private int pojoId = 1;
private String func1 = "function(i){return this.options[i]}";
private JSONFunction func2 = new JSONFunction(new String[]{"i"},"return this.options[i];");
// 以下为 get 、 set 方法
}
MyBean bean = new MyBean();
JSONObject jsonObject = JSONObject.fromObject(bean);
System.out.println(jsonObject);
输出:
{"func1":function(i){return this.options[i]},"pojoId":1,"name":"json","func2":function(i){ return this.options[i]; }
从 JSON 到 Beans
// 转化为动态 bean
String myjson = "{name=\"json\",bool:true,int:1,double:2.2,function:function(a){return a;},array:[1,2]}";
JSONObject json1 = JSONObject.fromString(myjson);
Object bean1 = JSONObject.toBean(json1);
由 JSON 生成 XML
JSONObject json = new JSONObject(true);
XMLSerializer xmlSerializer = new XMLSerializer();
String xml = xmlSerializer.write(json);
System.out.println("xml:" + xml);
输出: xml:<?xml version="1.0" encoding="UTF-8"?>
<o null="true"/>
JSONObject json2 = JSONObject.fromObject("{\"name\":\"json\",\"bool\":true,\"int\":1}");
String xml2 = xmlSerializer.write(json2);
System.out.println("xml2:" + xml2);
输出: xml2:<?xml version="1.0" encoding="UTF-8"?>
<o><bool type="boolean">true</bool><int type="number">1</int><name type="string">json</name></o>
JSONArray json3 = JSONArray.fromObject("[1,2,3]");
String xml3 = xmlSerializer.write(json3);
System.out.println("xml3:" + xml3);
输出: xml3:<?xml version="1.0" encoding="UTF-8"?>
<a><e type="number">1</e><e type="number">2</e><e type="number">3</e></a>