java simple json从数据库获取数据并显示

我想问一下如何生成desire json输出，如下所示：

{
 "Result":"OK",
 "Records":[
  {"PersonId":1,"Name":"Benjamin Button","Age":17,"RecordDate":"\/Date(1320259705710)\/"},
  {"PersonId":2,"Name":"Douglas Adams","Age":42,"RecordDate":"\/Date(1320259705710)\/"},
  {"PersonId":3,"Name":"Isaac Asimov","Age":26,"RecordDate":"\/Date(1320259705710)\/"},
  {"PersonId":4,"Name":"Thomas More","Age":65,"RecordDate":"\/Date(1320259705710)\/"}
 ]
}

<%@page language="java" import="java.sql.*"%>
<%@page import="java.util.*" %>
<%@page contentType="text/html; charset=UTF-8"%>
<%@page import="org.json.simple.JSONArray"%>
<%@page import="org.json.simple.JSONObject"%>
<%@page import="org.json.simple.parser.JSONParser"%>
<%@page import="org.json.simple.parser.ParseException"%>
<%
    String dept = (String)request.getParameter("dept");
    String sql  = "SELECT * FROM employees WHERE department='"+dept+"'";

    try
    {
        Class.forName("com.mysql.jdbc.Driver");
        Connection conn=null;
        conn=DriverManager.getConnection("jdbc:mysql://localhost/jspjsons","root","123456");
        ResultSet rs=null;
        Statement stm1=conn.createStatement();

        JSONArray list = new JSONArray();
        rs=stm1.executeQuery(sql);
        while(rs.next())
        {
            JSONObject obj=new JSONObject();
            obj.put("PersonId", rs.getString("id"));
            obj.put("Name", rs.getString("name"));
            obj.put("Age", rs.getString("age"));
            obj.put("RecordDate", rs.getString("date"));

            list.add(obj);
        }

        out.print(list);
    }
    catch(Exception ex)
    {
        out.println("<h1>"+ex+"</g1>");
    }
%>

我的jsp代码如下所示：

{
 "Result":"OK",
 "Records":[
  {"PersonId":1,"Name":"Benjamin Button","Age":17,"RecordDate":"\/Date(1320259705710)\/"},
  {"PersonId":2,"Name":"Douglas Adams","Age":42,"RecordDate":"\/Date(1320259705710)\/"},
  {"PersonId":3,"Name":"Isaac Asimov","Age":26,"RecordDate":"\/Date(1320259705710)\/"},
  {"PersonId":4,"Name":"Thomas More","Age":65,"RecordDate":"\/Date(1320259705710)\/"}
 ]
}

<%@page language="java" import="java.sql.*"%>
<%@page import="java.util.*" %>
<%@page contentType="text/html; charset=UTF-8"%>
<%@page import="org.json.simple.JSONArray"%>
<%@page import="org.json.simple.JSONObject"%>
<%@page import="org.json.simple.parser.JSONParser"%>
<%@page import="org.json.simple.parser.ParseException"%>
<%
    String dept = (String)request.getParameter("dept");
    String sql  = "SELECT * FROM employees WHERE department='"+dept+"'";

    try
    {
        Class.forName("com.mysql.jdbc.Driver");
        Connection conn=null;
        conn=DriverManager.getConnection("jdbc:mysql://localhost/jspjsons","root","123456");
        ResultSet rs=null;
        Statement stm1=conn.createStatement();

        JSONArray list = new JSONArray();
        rs=stm1.executeQuery(sql);
        while(rs.next())
        {
            JSONObject obj=new JSONObject();
            obj.put("PersonId", rs.getString("id"));
            obj.put("Name", rs.getString("name"));
            obj.put("Age", rs.getString("age"));
            obj.put("RecordDate", rs.getString("date"));

            list.add(obj);
        }

        out.print(list);
    }
    catch(Exception ex)
    {
        out.println("<h1>"+ex+"</g1>");
    }
%>

---

另外，在显示输出时，始终会出现像这样的前后支架[]，如何消除它？需要它以{}而不是[]开始和结束

如果您正在正确地创建

记录

数组（存储在

列表

变量中），则只需将其与

结果一起添加到新的
JSONObject

请记住，
{…}
表示
JSONObject
，
[…]
表示
JSONArray

while(rs.next())
{
    JSONObject obj=new JSONObject();
    obj.put("PersonId", rs.getString("id"));
    obj.put("Name", rs.getString("name"));
    obj.put("Age", rs.getString("age"));
    obj.put("RecordDate", rs.getString("date"));

    list.add(obj);
}

//Include this code beneath to create the JSON you require (mainObject).
JSONObject mainObject = new JSONObject();
mainObject.put("Result", "OK");
mainObject.put("Records", list);

如果正确地创建了
记录
数组（存储在
列表
变量中），则只需将其与
结果一起添加到新的
JSONObject

请记住，
{…}
表示
JSONObject
，
[…]
表示
JSONArray

while(rs.next())
{
    JSONObject obj=new JSONObject();
    obj.put("PersonId", rs.getString("id"));
    obj.put("Name", rs.getString("name"));
    obj.put("Age", rs.getString("age"));
    obj.put("RecordDate", rs.getString("date"));

    list.add(obj);
}

//Include this code beneath to create the JSON you require (mainObject).
JSONObject mainObject = new JSONObject();
mainObject.put("Result", "OK");
mainObject.put("Records", list);

您的代码意味着您需要对象数组，因为它必须以[]开头。如何使它以{}开头和结尾？与上面所需的输出一样，您不需要JSONArray list=new JSONArray（）；相反，您需要在其中直接使用JSONObject，您可以定义JSONArray属性并填充它。您的代码意味着您需要对象数组，因为它必须以[]开头。如何让它以{}开头和结尾？与上面所需的输出一样，您不需要JSONArray list=new JSONArray（）；相反，您需要在其中直接使用JSONObject，您可以定义JSONArray属性并填充它；正确吗？是的，
mainObject
应该看起来像您在问题顶部包含的所需JSON。您的意思是使用JSONObject而不是像out.print（mainObject）这样的JSONArray；正确吗？是的，
mainObject
应该与问题顶部包含的所需JSON相似。