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json ��试

G_G — Mon, 08 Oct 2007 07:08:00 GMT

参照�Q?/font>
http://json-lib.sourceforge.net/usage.html

�?json <-> object

package test.json;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.beanutils.PropertyUtils;

import com.jjm.viewBean.reportTableBean;

import net.sf.json.JSONArray;
import net.sf.json.JSONFunction;
import net.sf.json.JSONObject;

import junit.framework.TestCase;

public class JsonTest extends TestCase {

// object to json ************************************************************
    public void testList(){
        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"]
    }

    public void testMap(){
        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}
    }

    /**
     * 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];");
    */
     public void testBean(){
         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]; }}
     }

     /**
      * private int row ;
          private int col ;
          private String value ;
      *
      */
     public void testBeans(){
         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}]
     }



//    json  to object ************************************************************

     public void testJsonBeanUtil()throws Exception{
             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" ) );
     }

     public void testJsonBean(){
             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() );
     }
}

json <-> xml
JSON to XML

JSONObject json = new JSONObject( true ); String xml = XMLSerializer.write( json ); JSONObject json = new JSONObject( true ); String xml = XMLSerializer.write( json );	<o class="object" null="true"> <o class="object" null="true">
JSONObject json = JSONObject.fromObject("{\"name\":\"json\",\"bool\":true,\"int\":1}"); String xml = XMLSerializer.write( json ); JSONObject json = JSONObject.fromObject("{\"name\":\"json\",\"bool\":true,\"int\":1}"); String xml = XMLSerializer.write( json );	<o class="object"> <name type="string">jsonname> <bool type="boolean">truebool> <int type="number">1int> o> <o class="object"> <name type="string">json</name> <bool type="boolean">true</bool> <int type="number">1</int> </o>
JSONArray json = JSONArray.fromObject("[1,2,3]"); String xml = XMLSerializer.write( json ); JSONArray json = JSONArray.fromObject("[1,2,3]"); String xml = XMLSerializer.write( json );	<a class="array"< <e type="number">1e> <e type="number">2e> <e type="number">3e> a>

xml to json

<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]; }]

G_G 2007-10-08 15:08 发表评论

json 使用

G_G — Thu, 13 Sep 2007 03:36:00 GMT

使用后好处�?br />    java �?javascript 使用同统一对象,语法 . 数据�?sever �?v层和 v�?�?sever 方便.
            ��单说��是 JBean 不做修改拿到V�?�?JSBean (javascript �c? 中用

1.url ��q��问题参照 Ajax uri ��q��问题�ȝ��(IE,FF)
2.使用jar�?jxpath ; json ......(与相�?
               jxpath 参照 jxpath 学习(f��n)�W�记
               json 参照使用json-lib

例题说明 数据 name,avg 在通过 ajax json �?avg +1 再展现到��面
本页需�?json.js 下蝲�?http://www.json.org/json.js

<% @ page pageEncoding = " GBK " %>
<% @ page contentType = " text/html; charset=GBK " %>
< html >
   < head >
     < title > json.html title >

     < meta http-equiv ="keywords" content ="keyword1,keyword2,keyword3" >
     < SCRIPT src ="../js/json.js" > SCRIPT >

< script language ="javascript" type ="text/javascript" >
     var request = false ;

   // javascript Ajax 没什么好说的 �q�可以用 prototype prototype.js 的理�?/font>  ,dojo dojo �{?ajax
//本例为方便直接写�?^_^
     function getOpen(){
        try {
         request = new XMLHttpRequest();
       } catch (trymicrosoft) {
          try {
           request = new ActiveXObject( " Msxml2.XMLHTTP " );
         } catch (othermicrosoft) {
            try {
             request = new ActiveXObject( " Microsoft.XMLHTTP " );
           } catch (failed) {
             request = false ;
           }
         }
       }
    }


       function getCustomerInfo() {
      getOpen();
        if ( ! request)
         alert( " Error initializing XMLHttpRequest! " );

       //�q�通过 url 把数据传�l?server
       //数据来源 javascript �c?��׃��?DBdata     string: name:我名字^_^  , int: avg:�q�龄^_^
          var url = " /json/json?jsonStr= " + ( new DBdata()).toJSONString() ;
         request.open( " GET " , url, true );
         request.send( null );
         request.onreadystatechange = updatePage;
       }

       // ajax 处理数据后返回的 �l�果
      // �q�龄 +1 �q�输入到输入框中
        function updatePage(){
        if (request.readyState == 4 )
            if (request.status == 200 ){
            //得到 json str
              var jss = request.responseText;
            //加蝲�?javascript �c�M�� string -> jsBean
              var jsobj = eval('(' + jss + ')');
             //使用�?java对象一�?^_^
             document.getElementById('xx').value = jsobj.name + ':' + jsobj.avg ;
            }
       }

//数据来源
      function DBdata(){
          this .name = '刘凯�?;
          this .avg = 23 ;
          this .init = function (){
             alert('呵呵');
         }
     }
script >
   head >
   < body onload ="" >
       < INPUT id ='xx' type ="text" >
       < INPUT id ='x' type ="button" onclick ="getCustomerInfo()" value ="go" >
   body >
html >

��Z��(ji��n)方便明了(ji��n)我java方就使用�?server

package servlet;

import java.io.IOException;
import java.io.PrintWriter;

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

import org.apache.commons.jxpath.JXPathContext;

import net.sf.json.JSONObject;

public class Json extends HttpServlet {
    public void doGet(HttpServletRequest req,HttpServletResponse rpo)throws ServletException,IOException{
        rpo.setCharacterEncoding("GBK");
        req.setCharacterEncoding("GBK");
        rpo.setContentType("text/html; charset=GBK");

        PrintWriter out = rpo.getWriter() ;

        //得到 url 传入数据
        String str = req.getParameter("jsonStr") ;
        //java �?string -> javaBean
        JSONObject jso = JSONObject.fromString(str);
        //javaBean 使用jxpathcontxt解读更方�?^_^
        //其实jso中是�?map 形式存区�?有兴��的可以自己动手写下�?/font>
        JXPathContext jx = JXPathContext.newContext(jso);
        try {
             //jxpath好处来了(ji��n) avg + 1
            jx.setValue("./avg", jx.getValue("./avg + 1 ") );
        } catch (Exception e) {e.printStackTrace();}

       //�?jsonString 传出
        out.print(jso.toString());

    }
}

web.xml�Q�好象有点多嘴了(ji��n) 哈哈方便下入门�h�?ji��n)�?j��)

    <servlet>
        <servlet-name>jsonservlet-name>
        <servlet-class>servlet.Jsonservlet-class>
    servlet>
    <servlet-mapping>
        <servlet-name>jsonservlet-name>
        <url-pattern>/jsonurl-pattern>
    servlet-mapping>

G_G 2007-09-13 11:36 发表评论

av毛片在线免费看,国产伦理久久久久久妇女,精品资源在线

json ���试

json 使用

json ��试