/**
* 使用ajax提交表单，并接收返回值，根据返回值产生提示
*/
function subForm(){
alert($("#basePath").val());
$.ajax({
url : $("#basePath").val()+"servlet/RegisterServlet",
dataType : "text",
data : {"username":$("#user").val(),"password":$("#pass").val(),"again":$("#again").val(),"captcha":$("#captcha")},
timeout : 1000,
type : "POST",
success : function(data){
}
});
}接收的Servlet代码package cn.edu.tjut.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 cn.edu.tjut.service.RegisterService;
public class RegisterServlet 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 {
System.out.println("接收正常");
response.setContentType("text/html;charset=utf-8");
PrintWriter pw = response.getWriter();
//从request中取出参数
String captcha = request.getParameter("captcha");
String username = request.getParameter("username");
String password = request.getParameter("password");
String again = request.getParameter("again");
//获取验证码值
String checkcode = (String)request.getSession().getAttribute("checkcode");
//验证验证码是否正确
if(!captcha.equals(checkcode)){
pw.print(-1);
pw.flush();
pw.close();
return;
}
//检查两次输入密码是否一致
if(!password.equals(again)){
pw.print(-2);
pw.flush();
pw.close();
return;
}
RegisterService rs = new RegisterService();
int res = rs.addUser(username, password);
//验证添加是否成功
if(res==0){
pw.print(0);
pw.flush();
pw.close();
request.getRequestDispatcher("/login.jsp").forward(request, response);
}
pw.print(res);
pw.flush();
pw.close();
}
}控制台并没有输出接收正常
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