json学习二——>使用json需要导入的jar包_Json

2016/10/11 11:12
阅读数 121

json-lib-2.3-jdk15.jar 
commons-beanutils-1.7.0.jar 
commons-httpclient-3.1.jar 
commons-lang-2.3.jar 
commons-logging-1.0.4.jar 
commons-collections-3.1.jar 
ezmorph-1.0.3.jar 
这些包可以从一下地方下载: 
http://commons.apache.org/index.html 
http://json-lib.sourceforge.net/ 
http://ezmorph.sourceforge.net/ 
http://www.docjar.com/ 
如果不关联这些包,则会出现以下错误: 
java.lang.NoClassDefFoundError: net/sf/ezmorph/Morpher 
java.lang.NoClassDefFoundError: org/apache/commons/collections/map/ListOrderedMap 
java.lang.NoClassDefFoundError: org/apache/commons/beanutils/DynaBean 
java.lang.NoClassDefFoundError: org/apache/commons/codec/DecoderException 
java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableRuntimeException 
java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory 


package com.json;         
        
public class User {         
    String username;         
    String password;         
    public String getUsername() {         
        return username;         
    }         
    public void setUsername(String username) {         
        this.username = username;         
    }         
    public String getPassword() {         
        return password;         
    }         
    public void setPassword(String password) {         
        this.password = password;         
    }         
             
}  






package com.json;         
        
import java.io.IOException;         
import java.io.PrintWriter;         
import java.util.ArrayList;         
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;         
        
public class TestJson extends HttpServlet {         
        
    public void doGet(HttpServletRequest request, HttpServletResponse response)         
            throws ServletException, IOException {         
           doPost(request,response);         
    }         
    public void doPost(HttpServletRequest request, HttpServletResponse response)         
            throws ServletException, IOException {         
        
        response.setContentType("text/html");            
    String str= request.getParameter("name");//得到ajax传递过来的paramater         
        System.out.print(str);         
        PrintWriter out = response.getWriter();         
        List list = new ArrayList();//传递List         
                  Map m=new HashMap();//传递Map             
        User u1=new User();         
        u1.setUsername("zah");         
        u1.setPassword("123");         
        User u2=new User();         
        u2.setUsername("ztf");         
        u2.setPassword("456");           
        list.add(u1); //添加User对象               
         list.add(u2);     //添加User对象           
               
          m.put("u1", u1);         
         m.put("u2", u2);            
        
   JSONArray jsonArray2 = JSONArray.fromObject( list );         
       //把java数组转化成转化成json对象          
   JSONObject jo=JSONObject.fromObject(m);//转化Map对象         
        out.print(jsonArray2);//返给ajax请求         
       out.print(jo);//返给ajax请求         
    }         
}  






<script type="text/javascript" src="js/jquery.js"></script>         
<script type="text/javascript">         
     function test(){         
         $.ajax({          
                type:"POST", //请求方式         
                url:"testjson", //请求路径         
                cache: false,            
                data:"name=zah",  //传参         
                dataType: 'json',   //返回值类型         
               success:function(json){               
                    alert(json[0].username+" " json[0].password);    //弹出返回过来的List对象         
                   }         
                });         
      }         
</script>         
  </head>         
  <body>         
    <input type="button" name="b" value="测试" onclick=test()>         
  </body>

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