json格式ajax的post请求方式

1.java代码如下:

packagecom.eduask;

importjava.io.IOException;

importjavax.servlet.ServletException;

importjavax.servlet.http.HttpServlet;

importjavax.servlet.http.HttpServletRequest;

importjavax.servlet.http.HttpServletResponse;

publicclassDemo5extendsHttpServlet{

@Override

protectedvoidservice(HttpServletRequest req, HttpServletResponse resp)

throwsServletException, IOException {

resp.setContentType("text/xml;charset=utf-8");

String name=req.getParameter("username1");

resp.setCharacterEncoding("utf-8");

String msg="";

if("tom".equals(name)) {

msg="{'msg':'failed'}";

resp.getWriter().write(msg);

}else{

msg="{'msg':'success'}";

resp.getWriter().write(msg);

}

}

}

2.json.jsp代码如下:

username1:"text"id="username1"name="username1">

"msg1">

3.web.xml配置文件如下:

Demo5

com.eduask.Demo5

Demo5

/Demo5