实现用户注册

一.在pom.xml中导入依赖

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.yztc</groupId>
  <artifactId>Request</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>Request Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
    </dependency>
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.31</version>
    </dependency>
    <!--mysql数据库驱动-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.42</version>
    </dependency>
    <!--数据库连接池-->
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.2</version>
    </dependency>
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>mchange-commons-java</artifactId>
      <version>0.2.12</version>
    </dependency>
    <dependency>
      <groupId>commons-dbutils</groupId>
      <artifactId>commons-dbutils</artifactId>
      <version>1.7</version>
    </dependency>
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>commons-beanutils</groupId>
      <artifactId>commons-beanutils</artifactId>
      <version>1.9.2</version>
    </dependency>

  </dependencies>
  <build>
    <finalName>Request</finalName>
  </build>
</project>

二.实体类entity

package com.yztc.request.entity;

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 + "]";
    }
    
    
    
    
    
}

三.Dao层接口和实现类

package com.yztc.request.dao;

import com.yztc.request.entity.User;
import com.yztc.request.until.DbManager;
import org.apache.commons.dbutils.QueryRunner;
import java.sql.SQLException;

/**
 * _ooOoo_
 * o8888888o
 * 88" . "88
 * (| -_- |)
 * O = /O
 * ___/`---'\____
 * .   ' \| |// `.
 * / \||| : |||// 
 * / _||||| -:- |||||- 
 * | | \ - /// | |
 * | \_| ''---/'' | |
 *  .-\__ `-` ___/-. /
 * ___`. .' /--.-- `. . __
 * ."" '< `.___\_<|>_/___.' >'"".
 * | | : `- \`.;` _ /`;.`/ - ` : | |
 *   `-. \_ __ /__ _/ .-` / /
 * ======`-.____`-.___\_____/___.-`____.-'======
 * `=---='
 * .............................................
 *
 * @author bindu
 * @date 2017-12-09 14:54
 */


public class UserDaoImpl implements UserDao {
    @Override
    public void regist(User user) throws SQLException {
        String sql = "insert into user values(?,?,?,?,?,?,?)";
        QueryRunner queryRunner = DbManager.getInstance().getQuery();
        queryRunner.update(sql,user.getUid(),user.getUsername(),user.getPassword(),user.getName(),
                user.getEmail(),user.getSex(),user.getBirthday());
    }
}

四.controller层

package com.yztc.request.controller;

import com.yztc.request.dao.UserDaoImpl;
import com.yztc.request.entity.User;
import org.apache.commons.beanutils.BeanUtils;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.sql.SQLException;
import java.util.Map;
import java.util.UUID;

/**
 * _ooOoo_
 * o8888888o
 * 88" . "88
 * (| -_- |)
 * O = /O
 * ___/`---'\____
 * .   ' \| |// `.
 * / \||| : |||// 
 * / _||||| -:- |||||- 
 * | | \ - /// | |
 * | \_| ''---/'' | |
 *  .-\__ `-` ___/-. /
 * ___`. .' /--.-- `. . __
 * ."" '< `.___\_<|>_/___.' >'"".
 * | | : `- \`.;` _ /`;.`/ - ` : | |
 *   `-. \_ __ /__ _/ .-` / /
 * ======`-.____`-.___\_____/___.-`____.-'======
 * `=---='
 * .............................................
 *
 * @author bindu
 * @date 2017-12-09 15:13
 */


public class RegisterServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req,resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        Map<String, String[]> properties = req.getParameterMap();
        User user = new User();
        try {
            BeanUtils.populate(user,properties);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
        user.setUid(UUID.randomUUID().toString());
        UserDaoImpl userDao = new UserDaoImpl();
        try {
            userDao.regist(user);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        resp.sendRedirect(req.getContextPath()+"/login.jsp");
    }
}

五.配置web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                      http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
  <display-name>Archetype Created Web Application</display-name>
  <servlet>
    <servlet-name>first</servlet-name>
    <!--包名+类型-->
    <servlet-class>com.yztc.request.controller.RegisterServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>first</servlet-name>
    <url-pattern>/register</url-pattern>
  </servlet-mapping>


</web-app>

工具包: DbManager

package com.yztc.request.until;

import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.apache.commons.dbutils.QueryRunner;

import java.sql.Connection;
import java.sql.SQLException;

/**
 * 加载驱动
 * 建立连接
 * 执行sql的对象
 **/
public class DbManager {
    //        数据库连接核心类
    static ComboPooledDataSource dataSource;

    static {
        dataSource = new ComboPooledDataSource();
    }

    private static volatile DbManager instance = null;

    private DbManager() {
    }

    public static DbManager getInstance() {
        if (instance == null) {
            synchronized (DbManager.class) {
                if (instance == null) {
                    instance = new DbManager();
                }
            }
        }
        return instance;
    }


    public Connection getConnection() throws SQLException {
        return dataSource.getConnection();
    }

    /**
     * DbUtils
     * QueryRunner
     * ResultSetHandler
     */


    public QueryRunner getQuery() {
        return new QueryRunner(dataSource);
    }


}

数据库连接文件: c3p0-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<c3p0-config>

    <default-config>
        <property name="jdbcUrl">jdbc:mysql://127.0.0.1:3306/request?useUnicode=true&amp;characterEncoding=UTF-8
        </property>
        <property name="driverClass">com.mysql.jdbc.Driver</property>
        <property name="user">root</property>
        <property name="password">ROOT</property>
        <property name="checkoutTimeout">30000</property>
        <property name="idleConnectionTestPeriod">30</property>
        <property name="initialPoolSize">10</property>
        <property name="maxIdleTime">30</property>
        <property name="maxPoolSize">100</property>
        <property name="minPoolSize">10</property>
        <property name="maxStatements">200</property>
    </default-config>
</c3p0-config>

至于前端页面,需要自己写了!