SSM框架+jsp+mysql入門案例之一 登錄註冊功能

            學完ssm框架後的入門案例一：註冊登錄功能.如果登錄頁面覺得low,自己可以使用我寫好的登錄頁面，具體效果頁面在下面.

            1.運行環境：

• jdk1.8
• Tomcat 8.5
• IDEA
• MAVEN
• MYSQL                         

             2.目錄結構

red.html和test包與此項目無關，懶得刪了.

 

             3.  配置文件

     applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context.xsd
	http://www.springframework.org/schema/aop
	http://www.springframework.org/schema/aop/spring-aop.xsd
	http://www.springframework.org/schema/tx
	http://www.springframework.org/schema/tx/spring-tx.xsd">



    <!--開啓註解掃描，僅不掃描Controller-->
    <context:component-scan base-package="it.cast">
            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        </context:component-scan>


    <!--spring整合mybatis框架-->
    <!--配置連接池-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql:///ssm"/>
        <property name="user" value="root"/>
        <property name="password" value="123456"/>
    </bean>




<!--配置sqlsessionfactory工廠-->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--配置StudentDao接口所在包-->

<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="it.cast.dao"/>

</bean>

    <!--配置聲明式事務管理-->
    <!--配置事務管理-->
    <bean id="transactionManager " class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--配置事務通知-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager " >
        <tx:attributes>
            <!--從這一點設置的時間點開始（時間點a）到這個事務結束的過程中，其他事務所提交的數據，該事務將看不見！（查詢中不會出現別人在時間點a之後提交的數據）-->
            <tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
            <tx:method name="select*" propagation="SUPPORTS" read-only="true"/>


            <tx:method name="*" isolation="DEFAULT"/>
        </tx:attributes>
    </tx:advice>
    <!--增強aop-->
<aop:config>
    <aop:advisor advice-ref="txAdvice" pointcut="execution(* it.cast.service.*ServiceImpl.*(..))"/>

</aop:config>
</beans>

log4j.properties

# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

springmvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--開啓註解掃描，只掃描Controller-->
    <context:component-scan base-package="it.cast">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>


<!--配置視圖解析器-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>

    </bean>


    <!--靜態資源過濾-->
    <mvc:resources mapping="/css/" location="css/**"/>
    <mvc:resources mapping="/images/" location="images/**"/>
    <mvc:resources mapping="/js/" location="js/**"/>


<!--開啓springmvc框架支持-->
<mvc:annotation-driven/>


</beans>

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>
  <display-name>Archetype Created Web Application</display-name>

    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    
    
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
          <!--記載springmvc配置文件-->
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:springmvc.xml</param-value>
      </init-param>
      <!--啓動服務器，創建該servlet-->
<load-on-startup>1</load-on-startup>

  </servlet>

  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
    <!--監聽器-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!--加載spring配置文件-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    
    <!--解決中文亂碼-->
<filter>
    <filter-name>characterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>

</filter>


<filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

pom.xml

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

<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>cn.abc</groupId>
  <artifactId>example-ssm</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>example-ssm Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <spring.version>5.0.2.RELEASE</spring.version>
    <slf4j.version>1.6.6</slf4j.version>
    <log4j.version>1.2.12</log4j.version>
    <mysql.version>5.1.6</mysql.version>
    <mybatis.version>3.4.5</mybatis.version>
  </properties>

  <dependencies>
    <!-- spring -->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.6.8</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>compile</scope>
    </dependency>

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>

    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

    <!-- log start -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>${log4j.version}</version>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>${slf4j.version}</version>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>${slf4j.version}</version>
    </dependency>

    <!-- log end -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>

    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.0</version>
    </dependency>

    <dependency>
      <groupId>c3p0</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.1.2</version>
      <type>jar</type>
      <scope>compile</scope>
    </dependency>
  </dependencies>


  <build>
    <finalName>example-ssm</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

              4.數據庫

               5.詳細代碼

User.java

package it.cast.pojo;

public class User {
    private int id;
    private String username;
    private String password;

    public int getId () {
        return id;
    }

    public void setId ( int id ) {
        this.id = id;
    }

    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;
    }

    @Override
    public String toString () {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

dao層：對與簡單的增刪改查用註解比較方便

UserDao.java

package it.cast.dao;

import it.cast.pojo.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;

public interface UserDao {



//添加用戶
    @Insert("insert into user(username,password) values(#{username},#{password})")
    public int insert ( User user );

//查詢用戶
    @Select("select * from user where username=#{username}")
    public User finbyUsername ( String username );
    

}

UserService.java

package it.cast.service;

import it.cast.pojo.User;

public interface UserService {

//添加用戶
    public void  add(User user);


//校驗用戶名和密碼
    public User checkUsernameAndPassword(String username,String password);

//判斷用戶是否存在
    public boolean IsUsername( String username);


}

UserServiceImpl.java

package it.cast.service;

import it.cast.dao.UserDao;
import it.cast.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserDao userDao;

     //添加用戶
    @Override
    public void add ( User user ) {
        userDao.insert(user);
    }
    //校驗用戶名和密碼
    @Override
    public User checkUsernameAndPassword ( String username, String password ) {
        User user = userDao.finbyUsername(username);
        if (user != null && user.getPassword().equals(password)) {
            return user;
        }
        
        return null;
    }
    
    //校驗用戶名是否存在
    @Override
    public boolean IsUsername ( String username ) {

        User user = userDao.finbyUsername(username);
        if (user == null) { //用戶不存在
            return true;
        }
        return false;

    }
}

UserController.java

package it.cast.controller;

import it.cast.pojo.User;
import it.cast.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;




@Controller


public class UserController {
    @Autowired
    private UserService userService;
//登錄
    @RequestMapping("/login")
    public String login ( String username, String password) {
        User user = userService.checkUsernameAndPassword(username, password);
        if (user != null) {


            return "success";


        }
        return "error";
    }
//註冊
    @RequestMapping("/register")
    public String register ( String username, String password ) {
        Boolean user = userService.IsUsername(username);
        if (user == true) { //true:用戶不存在
            User user2 = new User();
            user2.setUsername(username);
            user2.setPassword(password);
            userService.add(user2);
            return "success";
        }
        return "error";
    }
}

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<br>
<br>
<h2>Hello World!</h2>
<a href="/findAll">入門程序</a></br>
<form action="/login" method="post">

用戶：<input type="text" name="username"><br/>
密碼：<input type="text" name="password"><br/>
      <input type="submit" value="登錄"><br/>
</form>


<form action="/register" method="post">

    用戶：<input type="text" name="username"><br/>
    密碼：<input type="text" name="password"><br/>
         <input type="submit" value="註冊"><br/>
</form>

</body>
</html>

error.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
失敗
</body>
</html>

success.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
成功
</body>
</html>