Json lib

浏览数：20 / 时间：2015年06月09日

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：

 1     package com.iflytek.json;  
 2       
 3     import net.sf.json.JSONFunction;  
 4       
 5     /** 
 6      * @author xudongwang 2012-1-15 
 7      *  
 8      *         Email:[email protected] 
 9      */  
10     public class MyBean {  
11         private String name = "json";  
12         private int pojoId = 1;  
13         private char[] options = new char[] { ‘a‘, ‘f‘ };  
14         private String func1 = "function(i){ return this.options[i]; }";  
15         private JSONFunction func2 = new JSONFunction(new String[] { "i" },  
16                 "return this.options[i];");  
17           
18           
19         public String getName() {  
20             return name;  
21         }  
22       
23         public void setName(String name) {  
24             this.name = name;  
25         }  
26       
27         public int getPojoId() {  
28             return pojoId;  
29         }  
30       
31         public void setPojoId(int pojoId) {  
32             this.pojoId = pojoId;  
33         }  
34       
35         public char[] getOptions() {  
36             return options;  
37         }  
38       
39         public void setOptions(char[] options) {  
40             this.options = options;  
41         }  
42       
43         public String getFunc1() {  
44             return func1;  
45         }  
46       
47         public void setFunc1(String func1) {  
48             this.func1 = func1;  
49         }  
50       
51         public JSONFunction getFunc2() {  
52             return func2;  
53         }  
54       
55         public void setFunc2(JSONFunction func2) {  
56             this.func2 = func2;  
57         }  
58       
59     }

JsonlibTest.java：

  1     package com.iflytek.json;  
  2       
  3     import java.lang.reflect.InvocationTargetException;  
  4     import java.util.ArrayList;  
  5     import java.util.HashMap;  
  6     import java.util.List;  
  7     import java.util.Map;  
  8       
  9     import net.sf.json.JSONArray;  
 10     import net.sf.json.JSONObject;  
 11       
 12     import org.apache.commons.beanutils.PropertyUtils;  
 13       
 14     /** 
 15      * @author xudongwang 2012-1-15 
 16      *  
 17      *         Email:[email protected] 
 18      */  
 19     public class JsonlibTest {  
 20       
 21         // JSONArray是将一个Java对象转换成json的Array格式,如[‘xdwang‘, 22]  
 22         private JSONArray jsonArray = null;  
 23         // JSONObject是将Java对象转换成一个json的Object形式,如{name:‘xdwang‘, age: 22}  
 24         private JSONObject jsonObject = null;  
 25       
 26         public static void main(String[] args) {  
 27             JsonlibTest json = new JsonlibTest();  
 28             json.ArrayToJSON();  
 29             json.ListToJSON();  
 30             json.MapsToJSON();  
 31             json.BeanToJSON();  
 32             json.JSONToBean();  
 33         }  
 34       
 35         /** 
 36          * 数组转JSON操作 
 37          */  
 38         public void ArrayToJSON() {  
 39             boolean[] boolArray = new boolean[] { true, false, true };  
 40             jsonArray = JSONArray.fromObject(boolArray);  
 41             System.out.println("数组转JSON操作:" + jsonArray);  
 42         }  
 43       
 44         /** 
 45          * 集合转JSON操作 
 46          */  
 47         public void ListToJSON() {  
 48             List<String> list = new ArrayList<String>();  
 49             list.add("first");  
 50             list.add("second");  
 51             jsonArray = JSONArray.fromObject(list);  
 52             System.out.println("集合转JSON操作:" + jsonArray);  
 53         }  
 54       
 55         /** 
 56          * Maps转JSON操作 
 57          */  
 58         public void MapsToJSON() {  
 59             Map<String, Object> map = new HashMap<String, Object>();  
 60             map.put("name", "json");  
 61             map.put("bool", Boolean.TRUE);  
 62             map.put("int", new Integer(1));  
 63             map.put("arr", new String[] { "a", "b" });  
 64             map.put("func", "function(i){ return this.arr[i]; }");  
 65             jsonObject = JSONObject.fromObject(map);  
 66             System.out.println("Maps转JSON操作:" + jsonObject);  
 67         }  
 68       
 69         /** 
 70          * Bean转JSON操作 
 71          */  
 72         public void BeanToJSON() {  
 73             jsonObject = JSONObject.fromObject(new MyBean());  
 74             System.out.println("Bean转JSON操作:" + jsonObject);  
 75         }  
 76       
 77         /** 
 78          * JSON转Bean操作 
 79          */  
 80         public void JSONToBean() {  
 81             try {  
 82                 String json = "{\"func1\":function(i){ return this.options[i]; },\"func2\":function(i){ return this.options[i]; },\"name\":\"json\",\"options\":[\"a\",\"f\"],\"pojoId\":1}";  
 83                 jsonObject = JSONObject.fromObject(json);  
 84                 Object bean = JSONObject.toBean(jsonObject);  
 85                 System.out.println("jsonStr:" + json);  
 86       
 87                 System.out.println("name:" + jsonObject.get("name"));  
 88                 System.out.println("name:"  
 89                         + PropertyUtils.getProperty(bean, "name"));  
 90                 System.out.println("pojoId:" + jsonObject.get("pojoId"));  
 91                 System.out.println("pojoId:"  
 92                         + PropertyUtils.getProperty(bean, "pojoId"));  
 93                 System.out.println("options:" + jsonObject.get("options"));  
 94                 System.out.println("options:"  
 95                         + PropertyUtils.getProperty(bean, "options"));  
 96                 System.out.println("func1:" + jsonObject.get("func1"));  
 97                 System.out.println("func1:"  
 98                         + PropertyUtils.getProperty(bean, "func1"));  
 99                 System.out.println("func2:" + jsonObject.get("func2"));  
100                 System.out.println("func2:"  
101                         + PropertyUtils.getProperty(bean, "func2"));  
102             } catch (IllegalAccessException e) {  
103                 e.printStackTrace();  
104             } catch (InvocationTargetException e) {  
105                 e.printStackTrace();  
106             } catch (NoSuchMethodException e) {  
107                 e.printStackTrace();  
108             }  
109         }  
110       
111     }