JavaWeb综合案例第一天（注册_验证码_邮箱验证_登录_退出_登陆成功之后的信息展示）
一、搭建开发环境—基于前后端分离的旅游项目
项目需要用到的技术栈
后端：Servlet, beanUtils , Jackson , javaMail , jdbctemplate ,druid + mysql
前端：bootstrap + jquery
1.创建web项目,创建java目录和resources目录
2.在pom.xml中导入项目需要用的依赖包
4.0.0
com.bianyiit
maven_tourism
1.0-SNAPSHOT
war
maven_tourism Maven Webapp
http://www.example.com
UTF-8
1.8
1.8
com.fasterxml.jackson.core
jackson-core
2.9.0
com.fasterxml.jackson.core
jackson-databind
2.9.0
com.fasterxml.jackson.core
jackson-annotations
2.9.0
redis.clients
jedis
2.7.2
commons-beanutils
commons-beanutils
1.9.2
compile
commons-logging
commons-logging
1.1.1
compile
javax.mail
javax.mail-api
1.5.6
com.sun.mail
javax.mail
1.5.3
redis.clients
jedis
2.7.0
org.springframework
spring-jdbc
5.0.5.RELEASE
org.springframework
spring-tx
5.0.5.RELEASE
org.springframework
spring-context
5.0.5.RELEASE
com.alibaba
druid
1.1.10
mysql
mysql-connector-java
5.1.6
javax.servlet
javax.servlet-api
3.1.0
provided
javax.servlet
jsp-api
2.0
provided
junit
junit
4.11
test
day12_redis_role
org.apache.tomcat.maven
tomcat7-maven-plugin
2.2
8080
/
3.在webapp下导入项目的前端资源--各类html页面/img/css/jquery/bootstrap...
4.创建数据库，导入六张表
5.在resources中导入两个配置文件
6.在util包下导入五个工具类
package com.bianyiit.util;
import com.alibaba.druid.pool.DruidDataSourceFactory;
import javax.sql.DataSource;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
/*
1. 声明静态数据源成员变量
2. 创建连接池对象
3. 定义公有的得到数据源的方法
4. 定义得到连接对象的方法
5. 定义关闭资源的方法
*/
public class JDBCUtils {
// 1. 声明静态数据源成员变量
private static DataSource ds;
// 2. 创建连接池对象
static {
// 加载配置文件中的数据
InputStream is = JDBCUtils.class.getClassLoader().getResourceAsStream("druid.properties");
Properties pp = new Properties();
try {
pp.load(is);
// 创建连接池，使用配置文件中的参数
ds = DruidDataSourceFactory.createDataSource(pp);
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
// 3. 定义公有的得到数据源的方法
public static DataSource getDataSource() {
return ds;
}
// 4. 定义得到连接对象的方法
public static Connection getConnection() throws SQLException {
return ds.getConnection();
}
// 5.定义关闭资源的方法
public static void close(Connection conn, Statement stmt, ResultSet rs) {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {}
}
if (stmt != null) {
try {
stmt.close();
} catch (SQLException e) {}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {}
}
}
// 6.重载关闭方法
public static void close(Connection conn, Statement stmt) {
close(conn, stmt, null);
}
}
package com.bianyiit.util;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
/**
* Jedis工具类
*/
public final class JedisUtil {
private static JedisPool jedisPool;
static {
//读取配置文件
InputStream is = JedisPool.class.getClassLoader().getResourceAsStream("jedis.properties");
//创建Properties对象
Properties pro = new Properties();
//关联文件
try {
pro.load(is);
} catch (IOException e) {
e.printStackTrace();
}
//获取数据，设置到JedisPoolConfig中
JedisPoolConfig config = new JedisPoolConfig();
config.setMaxTotal(Integer.parseInt(pro.getProperty("maxTotal")));
config.setMaxIdle(Integer.parseInt(pro.getProperty("maxIdle")));
//初始化JedisPool
jedisPool = new JedisPool(config, pro.getProperty("host"), Integer.parseInt(pro.getProperty("port")));
}
/**
* 获取连接方法
*/
public static Jedis getJedis() {
return jedisPool.getResource();
}
/**
* 关闭Jedis
*/
public static void close(Jedis jedis) {
if (jedis != null) {
jedis.close();
}
}
}
package com.bianyiit.util;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;
/**
* 发邮件工具类
*/
public final class MailUtils {
private static final String USER = "[email protected]"; // 发件人称号，同邮箱地址
private static final String PASSWORD = "xxxxx"; // 如果是qq邮箱可以使户端授权码，或者登录密码
/**
*
* @param to 收件人邮箱
* @param text 邮件正文
* @param title 标题
*/
/* 发送验证信息的邮件 */
public static boolean sendMail(String to, String text, String title){
try {
final Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.host", "smtp.163.com");
// 发件人的账号
props.put("mail.user", USER);
//发件人的密码
props.put("mail.password", PASSWORD);
// 构建授权信息，用于进行SMTP进行身份验证
Authenticator authenticator = new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
// 用户名、密码
String userName = props.getProperty("mail.user");
String password = props.getProperty("mail.password");
return new PasswordAuthentication(userName, password);
}
};
// 使用环境属性和授权信息，创建邮件会话
Session mailSession = Session.getInstance(props, authenticator);
// 创建邮件消息
MimeMessage message = new MimeMessage(mailSession);
// 设置发件人
String username = props.getProperty("mail.user");
InternetAddress form = new InternetAddress(username);
message.setFrom(form);
// 设置收件人
InternetAddress toAddress = new InternetAddress(to);
message.setRecipient(Message.RecipientType.TO, toAddress);
// 设置邮件标题
message.setSubject(title);
// 设置邮件的内容体
message.setContent(text, "text/html;charset=UTF-8");
// 发送邮件
Transport.send(message);
return true;
}catch (Exception e){
e.printStackTrace();
}
return false;
}
public static void main(String[] args) throws Exception { // 做测试用
MailUtils.sendMail("[email protected]","你好，这是一封来自编易官方的邮件。","测试邮件");
System.out.println("发送成功");
}
}
package com.bianyiit.util;
import java.security.MessageDigest;
/**
* 写一个MD5算法,运行结果与MySQL的md5()函数相同
* 将明文密码转成MD5密码
* 123456->e10adc3949ba59abbe56e057f20f883e
*/
public final class Md5Util {
private Md5Util(){}
/**
* 将明文密码转成MD5密码
*/
public static String encodeByMd5(String password) throws Exception{
//Java中MessageDigest类封装了MD5和SHA算法，今天我们只要MD5算法
MessageDigest md5 = MessageDigest.getInstance("MD5");
//调用MD5算法，即返回16个byte类型的值
byte[] byteArray = md5.digest(password.getBytes());
//注意：MessageDigest只能将String转成byte[]，接下来的事情，由我们程序员来完成
return byteArrayToHexString(byteArray);
}
/**
* 将byte[]转在16进制字符串
*/
private static String byteArrayToHexString(byte[] byteArray) {
StringBuffer sb = new StringBuffer();
//遍历
for(byte b : byteArray){//16次
//取出每一个byte类型，进行转换
String hex = byteToHexString(b);
//将转换后的值放入StringBuffer中
sb.append(hex);
}
return sb.toString();
}
/**
* 将byte转在16进制字符串
*/
private static String byteToHexString(byte b) {//-31转成e1，10转成0a，。。。
//将byte类型赋给int类型
int n = b;
//如果n是负数
if(n < 0){
//转正数
//-31的16进制数，等价于求225的16进制数
n = 256 + n;
}
//商(14)，数组的下标
int d1 = n / 16;
//余(1)，数组的下标
int d2 = n % 16;
//通过下标取值
return hex[d1] + hex[d2];
}
private static String[] hex = {"0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"};
/**
* 测试
*/
public static void main(String[] args) throws Exception{
String password = "123456";
String passwordMD5 = Md5Util.encodeByMd5(password);
System.out.println(password);
System.out.println(passwordMD5);
}
}
package com.bianyiit.util;
import java.util.UUID;
/**
* 产生UUID随机字符串工具类
*/
public final class UuidUtil {
private UuidUtil(){}
public static String getUuid(){
return UUID.randomUUID().toString().replace("-","");
}
/**
* 测试
*/
public static void main(String[] args) {
System.out.println(UuidUtil.getUuid());
System.out.println(UuidUtil.getUuid());
System.out.println(UuidUtil.getUuid());
System.out.println(UuidUtil.getUuid());
}
}
7.在domain下新建两个实体类
package com.bianyiit.domain;
import java.io.Serializable;
/**
* 用户实体类
*/
public class User implements Serializable {
private int uid;//用户id
private String username;//用户名，账号
private String password;//密码
private String name;//真实姓名
private String birthday;//出生日期
private String sex;//男或女
private String telephone;//手机号
private String email;//邮箱
private String status;//激活状态，Y代表激活，N代表未激活
private String code;//激活码（要求唯一）
/**
* 无参构造方法
*/
public User() {
}
/**
* 有参构方法
* @param uid
* @param username
* @param password
* @param name
* @param birthday
* @param sex
* @param telephone
* @param email
* @param status
* @param code
*/
public User(int uid, String username, String password, String name, String birthday, String sex, String telephone, String email, String status, String code) {
this.uid = uid;
this.username = username;
this.password = password;
this.name = name;
this.birthday = birthday;
this.sex = sex;
this.telephone = telephone;
this.email = email;
this.status = status;
this.code = code;
}
public int getUid() {
return uid;
}
public void setUid(int 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 getBirthday() {
return birthday;
}
public void setBirthday(String birthday) {
this.birthday = birthday;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
@Override
public String toString() {
return "User{" +
"uid=" + uid +
", username='" + username + '\'' +
", password='" + password + '\'' +
", name='" + name + '\'' +
", birthday='" + birthday + '\'' +
", sex='" + sex + '\'' +
", telephone='" + telephone + '\'' +
", email='" + email + '\'' +
", status='" + status + '\'' +
", code='" + code + '\'' +
'}';
}
}
package com.bianyiit.domain;
import java.io.Serializable;
import java.util.Objects;
/**
* 用于封装后端返回前端数据对象
*/
public class ResultInfo implements Serializable {
private boolean flag;//后端返回结果正常为true，发生异常返回false
private Object data;//后端返回结果数据对象
private String errorMsg;//发生异常的错误消息
//无参构造方法
public ResultInfo() {
}
public ResultInfo(boolean flag) {
this.flag = flag;
}
/**
* 有参构造方法
* @param flag
* @param errorMsg
*/
public ResultInfo(boolean flag, String errorMsg) {
this.flag = flag;
this.errorMsg = errorMsg;
}
/**
* 有参构造方法
* @param flag
* @param data
* @param errorMsg
*/
public ResultInfo(boolean flag, Object data, String errorMsg) {
this.flag = flag;
this.data = data;
this.errorMsg = errorMsg;
}
public boolean isFlag() {
return flag;
}
public void setFlag(boolean flag) {
this.flag = flag;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
public String getErrorMsg() {
return errorMsg;
}
public void setErrorMsg(String errorMsg) {
this.errorMsg = errorMsg;
}
}
二、注册功能的分析与代码编写
1.先打开index.html，查看整个网站的门户页面
2.打开register.html，进行用户名，密码的前端校验
注册
1.点击注册按钮，进入注册界面
2.前端校验的时机一：输入框失去焦点
2.前端校验的时机二：提交表单之前
4.用户名错误，密码正确的效果演示（不涉及服务器的处理，单纯的前端校验）
5.用户名正确，密码错误的效果演示（不涉及服务器的处理，单纯的前端校验）
3.在web下新建一个filter包，用于对浏览器传入的request进行中文乱码的解决
package com.bianyiit.web.filter;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;
@WebFilter("/*")
public class CharacterEncodingFilter implements Filter {
public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
chain.doFilter(req, resp);
}
public void init(FilterConfig config) throws ServletException {
}
public void destroy() {
}
}
3.在web下新建一个servlet包，在这个包下新建一个RegistServlet
package com.bianyiit.web.servlet;
import com.bianyiit.domain.ResultInfo;
import com.bianyiit.domain.User;
import com.bianyiit.services.UserService;
import com.bianyiit.services.UserServiceImpl;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.commons.beanutils.BeanUtils;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Map;
@WebServlet("/registServlet")
public class RegistServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("application/json;charset=utf-8");
ResultInfo resultInfo = new ResultInfo();
String check = request.getParameter("check");
String checkcode_server = (String) request.getSession().getAttribute("CHECKCODE_SERVER");
request.getSession().removeAttribute("CHECKCODE_SERVER");
ObjectMapper objectMapper = new ObjectMapper();
if(checkcode_server==null||!check.equalsIgnoreCase(checkcode_server)){
resultInfo.setFlag(false);
resultInfo.setErrorMsg("验证码不正确");
objectMapper.writeValue(response.getWriter(),resultInfo);
}
Map parameterMap = request.getParameterMap();
User user=new User();
try {
BeanUtils.populate(user,parameterMap);
} catch (Exception e) {
e.printStackTrace();
}
//System.out.println(user);
UserService userService = new UserServiceImpl();
int update = 0;
try {
update = userService.regist(user);
} catch (Exception e) {
e.printStackTrace();
resultInfo.setFlag(false);
resultInfo.setErrorMsg("注册失败");
objectMapper.writeValue(response.getWriter(),resultInfo);
return;
}
if(update>0){
//response.sendRedirect(request.getContextPath()+"/register.html");
resultInfo.setFlag(true);
resultInfo.setErrorMsg("注册成功");
objectMapper.writeValue(response.getWriter(),resultInfo);
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
业务处理流程
4.采用面向接口编程，能够提高程序的可维护型和可扩展性
package com.bianyiit.services;
import com.bianyiit.domain.User;
public interface UserService {
int regist(User user);
}
package com.bianyiit.services;
import com.bianyiit.dao.UserDao;
import com.bianyiit.dao.UserDaoImpl;
import com.bianyiit.domain.User;
import com.bianyiit.util.JedisUtil;
import com.bianyiit.util.MailUtils;
import com.bianyiit.util.UuidUtil;
import redis.clients.jedis.Jedis;
public class UserServiceImpl implements UserService {
UserDao userDao=new UserDaoImpl();
@Override
public int regist(User user) {
//1.保存用户到数据库
int add = userDao.add(user);
return add;
}
}
package com.bianyiit.dao;
import com.bianyiit.domain.User;
public interface UserDao {
int add(User user);
}
package com.bianyiit.dao;
import com.bianyiit.domain.User;
import com.bianyiit.util.JDBCUtils;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
public class UserDaoImpl implements UserDao{
JdbcTemplate jdbcTemplate = new JdbcTemplate(JDBCUtils.getDataSource());
@Override
public int add(User user) {
String sql="insert into tab_user values (null,?,?,?,?,?,?,?,?,?)";
int update = jdbcTemplate.update(sql,
user.getUsername(),
user.getPassword(),
user.getName(),
user.getBirthday(),
user.getSex(),
user.getTelephone(),
user.getEmail(),
user.getStatus(),
user.getCode());
return update;
}
}
页面效果展示
三、验证码功能的分析与代码编写
1.找到register页面
2.在servlet中新建一个CheckCodeServlet
package com.bianyiit.web.servlet;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;
/**
* 验证码
*/
@WebServlet("/checkCode")
public class CheckCodeServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
//服务器通知浏览器不要缓存
response.setHeader("pragma","no-cache");
response.setHeader("cache-control","no-cache");
response.setHeader("expires","0");
//在内存中创建一个长80，宽30的图片，默认黑色背景
//参数一：长
//参数二：宽
//参数三：颜色
int width = 80;
int height = 30;
BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
//获取画笔
Graphics g = image.getGraphics();
//设置画笔颜色为灰色
g.setColor(Color.GRAY);
//填充图片
g.fillRect(0,0, width,height);
//产生4个随机验证码，12Ey
String checkCode = getCheckCode();
//将验证码放入HttpSession中
request.getSession().setAttribute("CHECKCODE_SERVER",checkCode);
//设置画笔颜色为黄色
g.setColor(Color.YELLOW);
//设置字体的小大
g.setFont(new Font("黑体",Font.BOLD,24));
//向图片上写入验证码
g.drawString(checkCode,15,25);
//将内存中的图片输出到浏览器
//参数一：图片对象
//参数二：图片的格式，如PNG,JPG,GIF
//参数三：图片输出到哪里去
ImageIO.write(image,"PNG",response.getOutputStream());
}
/**
* 产生4位随机字符串
*/
private String getCheckCode() {
String base = "0123456789ABCDEFGabcdefg";
int size = base.length();
Random r = new Random();
StringBuffer sb = new StringBuffer();
for(int i=1;i<=4;i++){
//产生0到size-1的随机值
int index = r.nextInt(size);
//在base字符串中获取下标为index的字符
char c = base.charAt(index);
//将c放入到StringBuffer中去
sb.append(c);
}
return sb.toString();
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doGet(request,response);
}
}
验证码效果演示：
四、邮箱验证功能的分析与代码编写
1.回到注册用到的UserServiceImpl，当我们将用户信息保存到数据库之后，发送激活邮箱到真实的邮箱了
package com.bianyiit.services;
import com.bianyiit.dao.UserDao;
import com.bianyiit.dao.UserDaoImpl;
import com.bianyiit.domain.User;
import com.bianyiit.util.JedisUtil;
import com.bianyiit.util.MailUtils;
import com.bianyiit.util.UuidUtil;
import redis.clients.jedis.Jedis;
public class UserServiceImpl implements UserService {
UserDao userDao=new UserDaoImpl();
@Override
public int regist(User user) {
//1.保存用户到数据库
int add = userDao.add(user);
//2.发送激活邮件
String uuid = UuidUtil.getUuid();
Jedis jedis = JedisUtil.getJedis();
//两小时验证码有效
jedis.setex(uuid,5*60,user.getUsername());
jedis.close();
String mailContent="请点此激活您的用户";
MailUtils.sendMail(user.getEmail(),mailContent,"用户激活邮件");
return add;
}
@Override
public boolean active(String activeCode) {
Jedis jedis = JedisUtil.getJedis();
String username = jedis.get(activeCode);
if(username==null||username.length()==0){
return false;
}else {
int active = userDao.active(username);
if(active>0){
return true;
}else{
return false;
}
}
}
}
2.使用一个MailUtil工具类去完成这个发送邮箱的封装
package com.bianyiit.util;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;
/**
* 发邮件工具类
*/
public final class MailUtils {
private static final String USER = "[email protected]"; // 发件人称号，同邮箱地址
private static final String PASSWORD = "1f5ewf1a5f1ae5fa"; // 如果是qq邮箱可以使户端授权码，或者登录密码
/**
*
* @param to 收件人邮箱
* @param text 邮件正文
* @param title 标题
*/
/* 发送验证信息的邮件 */
public static boolean sendMail(String to, String text, String title){
try {
final Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.host", "smtp.qq.com");
// 发件人的账号
props.put("mail.user", USER);
//发件人的密码
props.put("mail.password", PASSWORD);
// 构建授权信息，用于进行SMTP进行身份验证
Authenticator authenticator = new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
// 用户名、密码
String userName = props.getProperty("mail.user");
String password = props.getProperty("mail.password");
return new PasswordAuthentication(userName, password);
}
};
// 使用环境属性和授权信息，创建邮件会话
Session mailSession = Session.getInstance(props, authenticator);
// 创建邮件消息
MimeMessage message = new MimeMessage(mailSession);
// 设置发件人
String username = props.getProperty("mail.user");
InternetAddress form = new InternetAddress(username);
message.setFrom(form);
// 设置收件人
InternetAddress toAddress = new InternetAddress(to);
message.setRecipient(Message.RecipientType.TO, toAddress);
// 设置邮件标题
message.setSubject(title);
// 设置邮件的内容体
message.setContent(text, "text/html;charset=UTF-8");
// 发送邮件
Transport.send(message);
return true;
}catch (Exception e){
e.printStackTrace();
}
return false;
}
public static void main(String[] args) throws Exception { // 做测试用
MailUtils.sendMail("[email protected]","你好，这是一封来自编易官方的邮件。","测试邮件");
System.out.println("发送成功");
}
}
3.去QQ邮箱中开启SMTP和POP3协议
4.开启成功之后，通过如下代码向用户发送邮件
5.进入邮箱点击之后，跳转至ActiveServlet
package com.bianyiit.web.servlet;
import com.bianyiit.services.UserService;
import com.bianyiit.services.UserServiceImpl;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/activeServlet")
public class ActiveServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String activeCode = request.getParameter("activeCode");
System.out.println(activeCode);
UserService userService=new UserServiceImpl();
boolean isactive = userService.active(activeCode);
if(isactive){
//激活成功，跳转至主页
response.sendRedirect(request.getContextPath()+"/active_ok.html");
}else {
response.sendRedirect(request.getContextPath()+"/active_fail.html");
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
激活成功之后的效果演示
五、登录功能的分析与代码编写
1.新建一个login.html
编易度假网-登录
欢迎登录编易度假账户
没有账户？立即注册
2.新建一个LoginServlet
package com.bianyiit.web.servlet;
import com.bianyiit.domain.ResultInfo;
import com.bianyiit.domain.User;
import com.bianyiit.services.UserService;
import com.bianyiit.services.UserServiceImpl;
import com.fasterxml.jackson.databind.ObjectMapper;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/loginServlet")
public class LoginServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("application/json;charset=utf-8");
ResultInfo info = new ResultInfo();
ObjectMapper objectMapper = new ObjectMapper();
String username = request.getParameter("username");
String password = request.getParameter("password");
String check = request.getParameter("check");
String checkCode= (String)request.getSession().getAttribute("CHECKCODE_SERVER");
request.getSession().removeAttribute(checkCode);
if(checkCode==null||!checkCode.equalsIgnoreCase(check)){
info.setFlag(false);
info.setErrorMsg("验证码错误");
objectMapper.writeValue(response.getWriter(),info);
return;
}
UserService userService=new UserServiceImpl();
User user = userService.login(username);
if(user==null){
info.setFlag(false);
info.setErrorMsg("登录用户不存在");
}else {
if(password==null||!password.equals(user.getPassword())){
info.setFlag(false);
info.setErrorMsg("密码不正确");
}else if(user.getStatus()==null){
info.setFlag(false);
info.setErrorMsg("用户未激活");
}else{
info.setFlag(true);
request.getSession().setAttribute("loginUser",user);
}
}
objectMapper.writeValue(response.getWriter(),info);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
3.业务逻辑处理
4.登录成功之后将用户信息封装到session中
5.登录成功之后，通过ajax返回一个data数据回来，并设置info.flag为true
6.这时我们在header.html中找到一段代码是用于获取用户存在session中的用户名
7.FindLoginUserServlet
package com.bianyiit.web.servlet;
import com.fasterxml.jackson.databind.ObjectMapper;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/findLoginUserServlet")
public class FindLoginUserServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Object loginUser = request.getSession().getAttribute("loginUser");
response.setContentType("application/json;charset=utf-8");
new ObjectMapper().writeValue(response.getWriter(),loginUser);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
8.登录的效果演示
六、退出功能的分析与代码编写
1.请求ExitServlet，将存在Session的值清空
2.ExitServlet
package com.bianyiit.web.servlet;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/exitServlet")
public class ExitServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.getSession().invalidate();
response.sendRedirect("index.html");
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
3.当点击退出之后的效果演示
