HTTP Servlet Request 注册和登录的基本实现(页码SR2.2)

亦凉 2023-07-09 02:13 20阅读 0赞

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTIyODQ1_size_16_color_FFFFFF_t_70]  
注册

package cn.aynortechnology.register;
    
    import java.io.IOException;
    import java.lang.reflect.InvocationTargetException;
    import java.sql.SQLException;
    import java.util.Map;
    import java.util.UUID;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.apache.commons.beanutils.BeanUtils;
    import org.apache.commons.dbutils.QueryRunner;
    
    import com.mchange.v2.beans.BeansUtils;
    
    import cn.aynortechnology.utils.DataSourceUtils;
    
    public class RegisterServlet extends HttpServlet {
    
    	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		//get方式乱码解决
    		//String username = request.getParameter("username");	//乱码
    		//先用iso8859-1编码，再用utf-8解码
    		//username = new String(username.getBytes("iso8859-1"),"UTF-8");
    		
    		//设置request的编码---只适合post方式
    		request.setCharacterEncoding("UTF-8");
    		
    		//1.获取数据
    		//String username = request.getParameter("username");
    		//String password = request.getParameter("password");
    		//2.将散装数据封装到javaBean中
    		//User user = new User();
    		//user.setUsername(username);
    		//user.setPassword(password);
    		
    		//使用BeanUtils进行自动映射封装
    		//BeanUtils工作原理：将map中的数据 根据key与实体的属性的对应关系封装
    		//只要key的名字与实体的属性的名字一样就自动封装到实体中
    		Map<String, String[]> properties = request.getParameterMap();
    		User user = new User();
    		try {
    			BeanUtils.populate(user,properties);
    		} catch (IllegalAccessException e) {
    			e.printStackTrace();
    		} catch (InvocationTargetException e) {
    			e.printStackTrace();
    		}
    		//现在这个位置 user对象已经封装好了
    		//手动封装uid--uuid--随机的不重复的字符串32位--java代码生成后是36位的
    		user.setUid(UUID.randomUUID().toString());
    		//3.将参数传递给一个业务操作方法
    		try {
    			regist(user);
    		} catch (SQLException e) {
    			// TODO 自动生成的 catch 块
    			e.printStackTrace();
    		}
    		//4.认为注册成功，跳转到登录页面
    		response.sendRedirect(request.getContextPath()+"/login.html");
    	}
    	//注册的方法
    		public void regist(User user) throws SQLException {
    			//操作数据库
    			QueryRunner runner = new QueryRunner(DataSourceUtils.getDataSource());
    			String sql = "insert into user values(?,?,?,?,?,?,?,?,?,?)";
    			
    			runner.update(sql,user.getUid(),user.getUsername(),user.getPassword(),user.getName(),
    					user.getEmail(),null,user.getBirthday(),user.getSex(),null,null);
    		}
    
    	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		doGet(request, response);
    	}
    	
    	
    }

User类

package cn.aynortechnology.register;
    
    public class User {
    	private String uid;
    	private String username;
    	private String password;
    	private String name;
    	private String email;
    	private String sex;
    	private String birthday;
    	
    	public String getUid() {
    		return uid;
    	}
    	public void setUid(String uid) {
    		this.uid = uid;
    	}
    	public String getUsername() {
    		return username;
    	}
    	public void setUsername(String username) {
    		this.username = username;
    	}
    	public String getPassword() {
    		return password;
    	}
    	public void setPassword(String password) {
    		this.password = password;
    	}
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public String getEmail() {
    		return email;
    	}
    	public void setEmail(String email) {
    		this.email = email;
    	}
    	public String getSex() {
    		return sex;
    	}
    	public void setSex(String sex) {
    		this.sex = sex;
    	}
    	public String getBirthday() {
    		return birthday;
    	}
    	public void setBirthday(String birthday) {
    		this.birthday = birthday;
    	}
    	
    	@Override
    	public String toString() {
    		return "User [uid=" + uid + ", username=" + username + ", password=" + password + ", name=" + name + ", email="
    				+ email + ", sex=" + sex + ", birthday=" + birthday + "]";
    	}
    	
    }

登录校验(不包含验证码，完善请点击[这里][Link 1])

package cn.aynortechnology.login;
    
    import java.io.IOException;
    import java.sql.SQLException;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.apache.commons.dbutils.QueryRunner;
    import org.apache.commons.dbutils.handlers.BeanHandler;
    
    import cn.aynortechnology.register.User;
    import cn.aynortechnology.utils.DataSourceUtils;
    
    public class LoginServlet extends HttpServlet {
    
    	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		request.setCharacterEncoding("UTF-8");
    		//1.获得用户名和密码
    		String username = request.getParameter("username");
    		String password = request.getParameter("password");
    		//2.调用一个业务方法进行该用户查询
    		User login = null;
    		try {
    			login = login(username,password);
    		} catch (SQLException e) {
    			// TODO 自动生成的 catch 块
    			e.printStackTrace();
    		}
    		//3.通过user是否为null判断用户名密码是否正确
    		if(login!=null) {
    			//用户名密码正确
    			//登陆成功 跳转到网站的首页 使用重定向
    			response.sendRedirect(request.getContextPath()+"/index.jsp");
    		}else {
    			//用户名或密码错误
    			//跳会当前login.jsp
    			//使用转发 转发到login.jsp 向request域中存储错误信息
    			request.setAttribute("loginInfo", "用户名或密码错误");
    			request.getRequestDispatcher("/login.html").forward(request,response);
    		}
    	}
    	public User login(String username,String password) throws SQLException {
    		QueryRunner runner = new QueryRunner(DataSourceUtils.getDataSource());
    		String sql = "select * from user where username=? and password=?";
    		User user = runner.query(sql, new BeanHandler<User>(User.class),username,password);
    		return user;
    	}
    
    	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		doGet(request, response);
    	}
    }

[(页码SR2.1)HTTP Servlet Request 获得请求行、请求头、请求体、完成防盗链][SR2.1_HTTP Servlet Request]  
[(页码SR2.2)HTTP Servlet Request 注册和登录的基本实现][SR2.2_HTTP Servlet Request]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTIyODQ1_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200227124429838.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwOTIyODQ1,size_16,color_FFFFFF,t_70
[Link 1]: https://blog.csdn.net/qq_40922845/article/details/105033480
[SR2.1_HTTP Servlet Request]: https://blog.csdn.net/qq_40922845/article/details/104519511
[SR2.2_HTTP Servlet Request]: https://blog.csdn.net/qq_40922845/article/details/104534202