java 转json 报错处理机制 案例 .

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。 
http://kingpingping.iteye.com/blog/1157771 


报错处理机制 

commons-beanutils-1.8.0.jar不加这个包 
java.lang.NoClassDefFoundError: org/apache/commons/beanutils/DynaBean 

commons-collections.jar 不加这个包 
java.lang.NoClassDefFoundError: org/apache/commons/collections/map/ListOrderedMap 

commons-lang-2.4.jar不加这个包 
java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableRuntimeException 

commons-logging-1.1.1.jar不加这个包 
java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory 

ezmorph-1.0.4.jar不加这个包 
java.lang.NoClassDefFoundError: net/sf/ezmorph/Morpher 

json-lib-2.3-jdk15.jar不加这个包 
java.lang.NoClassDefFoundError: net/sf/json/JSONObject 


我把这段代码拿到junit下测试 就报错了。java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeException错误，查了下原因原来是少了3个包。因为我在使用json的时候只导入了json-lib-2.1.jar这个包 但是程序还需要这4个包： 
commons-beanutils-1.7.0.jar 

commons-collections-3.2.jar 

commons-lang-2.1.jar 
ezmorph-1.0.2.jar 
导入之后就发现 OK了。 


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 = new boolean[]{true,false,true};      
           JSONArray jsonArray1 = JSONArray.fromObject( boolArray );      
           System.out.println( jsonArray1 );      
           // prints [true,false,true]     
              
           List list = new ArrayList();      
           list.add( "first" );      
           list.add( "second" );      
           JSONArray jsonArray2 = JSONArray.fromObject( list );      
           System.out.println( jsonArray2 );      
           // prints ["first","second"]     
  
           JSONArray jsonArray3 = JSONArray.fromObject( "['json','is','easy']" );      
           System.out.println( jsonArray3 );      
           // prints ["json","is","easy"]     

boolean[] boolArray = new boolean[]{true,false,true};   
            JSONArray jsonArray1 = JSONArray.fromObject( boolArray );   
            System.out.println( jsonArray1 );   
            // prints [true,false,true]  
            
            List list = new ArrayList();   
            list.add( "first" );   
            list.add( "second" );   
            JSONArray jsonArray2 = JSONArray.fromObject( list );   
            System.out.println( jsonArray2 );   
            // prints ["first","second"]  

            JSONArray jsonArray3 = JSONArray.fromObject( "['json','is','easy']" );   
            System.out.println( jsonArray3 );   
            // prints ["json","is","easy"]   

2、Map 
Java代码  
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 );      
         //{"func":function(i){ return this.arr[i]; },"arr":["a","b"],"int":1,"name":"json","bool":true}  

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 );   
         //{"func":function(i){ return this.arr[i]; },"arr":["a","b"],"int":1,"name":"json","bool":true} 

3、BEAN 
Java代码  
/**  
     * Bean.java   
        private String name = "json";     
        private int pojoId = 1;     
        private char[] options = new char[]{'a','f'};     
        private String func1 = "function(i){ return this.options[i]; }";     
        private JSONFunction func2 = new JSONFunction(new String[]{"i"},"return this.options[i];");  
    */    
JSONObject jsonObject = JSONObject.fromObject( new JsonBean() );      
System.out.println( jsonObject );      
//{"func1":function(i){ return this.options[i]; },"pojoId":1,"name":"json","options":["a","f"],"func2":function(i){ return this.options[i]; }}    

/** 
     * Bean.java 
        private String name = "json";   
        private int pojoId = 1;   
        private char[] options = new char[]{'a','f'};   
        private String func1 = "function(i){ return this.options[i]; }";   
        private JSONFunction func2 = new JSONFunction(new String[]{"i"},"return this.options[i];"); 
    */ 
JSONObject jsonObject = JSONObject.fromObject( new JsonBean() );   
System.out.println( jsonObject );   
//{"func1":function(i){ return this.options[i]; },"pojoId":1,"name":"json","options":["a","f"],"func2":function(i){ return this.options[i]; }}  

4、BEANS 
Java代码  
/**  
      * private int row ;  
          private int col ;  
          private String value ;  
      *  
      */  
List list = new ArrayList();   
         JsonBean2 jb1 = new JsonBean2();   
         jb1.setCol(1);   
         jb1.setRow(1);   
         jb1.setValue("xx");   
            
         JsonBean2 jb2 = new JsonBean2();   
         jb2.setCol(2);   
         jb2.setRow(2);   
         jb2.setValue("");   
            
            
         list.add(jb1);   
         list.add(jb2);   
            
         JSONArray ja = JSONArray.fromObject(list);   
         System.out.println( ja.toString() );   
         //[{"value":"xx","row":1,"col":1},{"value":"","row":2,"col":2}]  

/** 
      * private int row ; 
          private int col ; 
          private String value ; 
      * 
      */ 
List list = new ArrayList(); 
         JsonBean2 jb1 = new JsonBean2(); 
         jb1.setCol(1); 
         jb1.setRow(1); 
         jb1.setValue("xx"); 
         
         JsonBean2 jb2 = new JsonBean2(); 
         jb2.setCol(2); 
         jb2.setRow(2); 
         jb2.setValue(""); 
         
         
         list.add(jb1); 
         list.add(jb2); 
         
         JSONArray ja = JSONArray.fromObject(list); 
         System.out.println( ja.toString() ); 
         //[{"value":"xx","row":1,"col":1},{"value":"","row":2,"col":2}] 

5、String to bean 
Java代码  
String json = "{name=\"json\",bool:true,int:1,double:2.2,func:function(a){ return a; },array:[1,2]}";      
JSONObject jsonObject = JSONObject.fromString(json);      
Object bean = JSONObject.toBean( jsonObject );      
assertEquals( jsonObject.get( "name" ), PropertyUtils.getProperty( bean, "name" ) );      
  assertEquals( jsonObject.get( "bool" ), PropertyUtils.getProperty( bean, "bool" ) );      
  assertEquals( jsonObject.get( "int" ), PropertyUtils.getProperty( bean, "int" ) );      
   assertEquals( jsonObject.get( "double" ), PropertyUtils.getProperty( bean, "double" ) );      
   assertEquals( jsonObject.get( "func" ), PropertyUtils.getProperty( bean, "func" ) );      
  List expected = JSONArray.toList( jsonObject.getJSONArray( "array" ) );      
  assertEquals( expected, (List) PropertyUtils.getProperty( bean, "array" ) );    

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


Java代码  
String json = "{\"value\":\"xx\",\"row\":1,\"col\":1}";      
JSONObject jsonObject = JSONObject.fromString(json);   
  JsonBean2 bean = (JsonBean2) JSONObject.toBean( jsonObject, JsonBean2.class );      
   assertEquals( jsonObject.get( "col" ),new Integer( bean.getCol())  );      
     assertEquals( jsonObject.get( "row" ), new Integer( bean.getRow() ) );      
     assertEquals( jsonObject.get( "value" ), bean.getValue() );    

String json = "{\"value\":\"xx\",\"row\":1,\"col\":1}";   
  JSONObject jsonObject = JSONObject.fromString(json); 
   JsonBean2 bean = (JsonBean2) JSONObject.toBean( jsonObject, JsonBean2.class );   
    assertEquals( jsonObject.get( "col" ),new Integer( bean.getCol())  );   
      assertEquals( jsonObject.get( "row" ), new Integer( bean.getRow() ) );   
      assertEquals( jsonObject.get( "value" ), bean.getValue() );  


6  json to xml 
1) 
JSONObject json = new JSONObject( true );  
String xml = XMLSerializer.write( json );  

  

2) 
JSONObject json = JSONObject.fromObject("{\"name\":\"json\",\"bool\":true,\"int\":1}");  
String xml = XMLSerializer.write( json );  
  
   json  
   true  
   1  
  
    
      json 
      true 
      1 
    
3) 
JSONArray json = JSONArray.fromObject("[1,2,3]");  
String xml = XMLSerializer.write( json );  
 
   1  
   2  
   3  
  

7 、xml to json 
  
    
      return matrix[i][j];  
    
  
    
      
         return matrix[i][j]; 
      
    
   
JSONArray json = (JSONArray) XMLSerializer.read( xml );  
System.out.println( json );  
// prints [function(i,j){ return matrix[i][j]; }]  



在Java中加上这几个包 

实例： 

import java.io.IOException; 
import java.util.ArrayList; 
import java.sql.Date; 
import java.util.List; 

import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 

import net.sf.json.JSONArray; 
import net.sf.json.JSONObject; 
import aa.JsonBean2; 


public class main extends HttpServlet { 

  
public void doGet(HttpServletRequest request, HttpServletResponse response) 
   throws ServletException, IOException { 
  
  List list = new ArrayList(); 
  JsonBean2 jb1 = new JsonBean2(); 
  jb1.setA(1); 
  jb1.setB("丁龙飞"); 
  System.out.println("*****123"); 
  Date c=new Date(100,9,10); 
  String s=c.toString(); 
  System.out.println(s+"33333"); 
  jb1.setC(s); 
  JsonBean2 jb2 = new JsonBean2(); 
  jb2.setA(1); 
  jb2.setB("b"); 
  jb2.setC(s); 
  list.add(jb1); 
  list.add(jb2); 
  JSONObject obj= JSONObject.fromObject(jb1); 
  System.out.println(obj.toString()+"*****123"); 
  JSONArray ja = JSONArray.fromObject(list); 
  System.out.println(ja.toString()+"-------------"); 
  System.out.println("asdfasdf"); 
// List list=new ArrayList(); 
  String a="var a=[[1,{text:'ext'},{text:'q'},1,'132','321','2008-01-01 12:01:01'],[2,{text:'ext'},{text:'w'},2,'132','321','2008-01-01 12:01:01']]";  
  response.getWriter().print(a); 
  
} 

  
public void doPost(HttpServletRequest request, HttpServletResponse response) 
   throws ServletException, IOException { 

   doGet(request, response); 
} 

}