Servlet封装BaseServlet

Servlet封装BaseServlet类

import java.io.IOException;
import java.lang.reflect.Method;

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

/**
 * 
 * @Title: BaseServlet
 * @Description: 封装的BaseServlet
 * @Company: 山东九点连线信息技术有限公司
 * @ProjectName: Summarize
 * @author fupengpeng
 * @date 2017年11月27日 上午11:35:15
 */
public abstract class BaseServlet extends HttpServlet {
    @Override
    public void service(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=utf-8");
        request.setCharacterEncoding("utf-8");
        // 1、获得执行的方法名
        String methodName = request.getParameter("method");
        // 默认方法
        if (methodName == null) {
            methodName = "execute";
        }

        System.out.println("BaseServlet : 本次所执行方法 :  " + methodName);

        try {
            // 2、通过反射获得当前运行类中指定方法,形式参数
            Method executeMethod = this.getClass().getMethod(methodName,
                    HttpServletRequest.class, HttpServletResponse.class);
            // 3、反射执行方法
            String result = (String) executeMethod.invoke(this, request,
                    response);
            // 4、将json数据返回
            response.getWriter().write(result);
        } catch (NoSuchMethodException e) {
            throw new RuntimeException("未知方法  : " + methodName);
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException("服务器异常", e);
        }
    }

    /**
     * 默认执行方法
     */
    public void execute(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
    }
}

用户管理Servlet（UserServlet）继承BaseServlet

import java.io.IOException;

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

import com.fpp.base.BaseServlet;

/**
 * 
 * @Title: UserServlet
 * @Description: 用户管理servlet
 * @Company: 山东九点连线信息技术有限公司
 * @ProjectName: Summarize
 * @author fupengpeng
 * @date 2017年11月27日 下午3:54:45
 */
public class UserServlet extends BaseServlet {

    /**
     * 
     * @Description: 登录 http://localhost:8080/Summarize/UserServlet?method=login
     *               &account=zhangsan&password=123456
     * @Title: login
     * @param request
     * @param response
     * @return
     * @throws ServletException
     * @throws IOException
     *             String
     */
    public String login(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        // 1.获取到客户端传递过来的用户账号和密码
        String name = request.getParameter("account");
        String password = request.getParameter("password");
        // 2.判断用户是否登录成功
        if ("zhangsan".equals(name) && "123456".equals(password)) {
            System.out.println("登录成功");
            return "denglu chenggong";
        } else {
            System.out.println("登录失败");
            return "denglu shibai";
        }

    }

    /**
     * 
     * @Description: 注册   http://localhost:8080/Summarize/UserServlet?method=register&account=zhangsan&phonenumber=17712345678
     * @Title: register 
     * @param request
     * @param response
     * @return
     * @throws ServletException
     * @throws IOException
     * String
     */
    public String register(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //1.获取到传递过来的数据
        String name = request.getParameter("account");
        String phonenumber = request.getParameter("phonenumber");
        //2.保存至数据，返回注册成功
        return "zhuce chenggong";
    }

}

web.xml中配置UserServlet

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    id="WebApp_ID" version="3.1">
    <display-name>Summarizedisplay-name>

    <servlet>
        <servlet-name>UserServletservlet-name>
        <servlet-class>com.fpp.test.UserServletservlet-class>
    servlet>
    <servlet-mapping>
        <servlet-name>UserServletservlet-name>
        <url-pattern>/UserServleturl-pattern>
    servlet-mapping>

    <welcome-file-list>
        <welcome-file>index.htmlwelcome-file>
        <welcome-file>index.htmwelcome-file>
        <welcome-file>index.jspwelcome-file>
        <welcome-file>default.htmlwelcome-file>
        <welcome-file>default.htmwelcome-file>
        <welcome-file>default.jspwelcome-file>
    welcome-file-list>
web-app>

访问登录方法

部署项目到tomcat后运行项目，浏览器访问登录方法：http://localhost:8080/Summarize/UserServlet?method=login&account=zhangsan&password=123456

访问注册方法：http://localhost:8080/Summarize/UserServlet?method=register&account=zhangsan&phonenumber=17712345678