In my project, for inserting, updating and deleting the data I am requesting to servlet class and then it process and get back the response.

这一切都是通过 j子发生的。

现在,它只应对以下成功或不足:

PrintWriter out =   response.getWriter();
out.println("<custom message>");

我现在想使这一信息更有意义

如果格式为<代码>null,则一经违约即接受1个参数,即:<编码>条形>。 否则,只有2种备选办法,即<代码>json <>/code>和xml。

然后需要制定<代码>response.setContentType(“application/json”);等。

因此,一将按以下方式开设一个服务器级:

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


public class myservlet extends HttpServlet {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    public void doPost(HttpServletRequest req,HttpServletResponse resp) throws ServletException,java.io.IOException
    {
        String format   =   req.getParameter("format");

        if(format == null)
        {
            format  =   "json";
        }
        else
        {
            if(format.equals("json"))
            {
                resp.setContentType("application/json");
            }
            else if(format.equals("xml"))
            {
                resp.setContentType("application/rss+xml");
            }
            else
            {
                //error
            }
        }
    }

    public void doGet(HttpServletRequest req,HttpServletResponse resp) throws ServletException,java.io.IOException
    {
        String format   =   req.getParameter("format");

        if(format == null)
        {
            format  =   "json";
        }
        else
        {
            if(format.equals("json"))
            {
                resp.setContentType("application/json");
            }
            else if(format.equals("xml"))
            {
                resp.setContentType("application/rss+xml");
            }
            else
            {
                //error
            }
        }
    }

}

以上职等如下:

进口java.io。 打印机;

import javax.servlet.ServletException;

public class abc extends myservlet
{
    private static final long serialVersionUID = 1L;

    public void doPost(HttpServletRequest req,HttpServletResponse resp) throws ServletException,java.io.IOException
    {
        PrintWriter out     =   resp.getWriter();
            out.println("{/"id/": /"file/"}");
        //response must be converted to either json or to xml
    }
}

能否做到这一点?

如何转换对xml或json的答复 是否有活力?