loginServlet.java

package login.com;

 

/**
* 这个类主要的功能是获取前端页面用户输入的用户名和密码 然后调用LoginSuccess方法进行用户名和密码与数据库中数据进行匹配
* 并进行跳转，用户名和密码正确跳转login_success.jsp，错误跳转login_failed.jsp
*/
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
// 登录方法
public class loginServlet implements javax.servlet.Servlet {
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws Exception {
request.setCharacterEncoding("utf-8");
String username = request.getParameter("username");// 取得用户名
String password = request.getParameter("password");// 取得密码
System.out.println("页面取得用户名和密码"+username+"|"+password);

LoginSuccess db = new LoginSuccess(); // 构建登陆对象
boolean canLogin = db.LoginSuccess(username, password);// 取得用户名和密码
if (canLogin) {// 根据登陆情况，跳转页面
System.out.println("用户名和密码正确");
response.sendRedirect("loginSuccess.jsp");
} else {
response.sendRedirect("loginFailed.jsp");
System.out.println("用户名和密码错误");
}
}
public void destroy() {
}
public ServletConfig getServletConfig() {
return null;
}
public String getServletInfo() {
return null;
}
public void init(ServletConfig arg0) throws ServletException {
}

public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException {
HttpServletRequest rq = (HttpServletRequest) request;
HttpServletResponse rs = (HttpServletResponse) response;
try {
doPost(rq, rs);
} catch (Exception e) {
e.printStackTrace();
}
}
}