SSM实现登录注册的小案例(手把手喂饭)

Posted 2022-10-16 长理小生

SSM实现登录注册的小案例

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为了您有更好的阅读体验，原文链接如下，长理小生：https://lixingweiblog.github.io/Pages

SpringMVC+Spring+Mybatis

涉及知识

• java的注解、反射、代理
• 数据库的设计、增删改查、索引
• Spring的IoC注入原理
• SpringMVC与web交互
• Mybatis代理Dao层

所需环境

• jdk、maven、SQLServer

一、数据库设计（SQL Server）

1.表的结构

表customers：

• customer_id int 主键
• customer_account varchar(20) 用户名
• customer_passwd char(64) 密码哈希
• message_id int 用户信息外键

表message：

• message_id int 主键
• message_email varchar(40) 邮箱
• message_phone varchar(20) 电话

USE SpringSigninReg;
CREATE TABLE message
(
	message_id INT NOT NULL PRIMARY KEY IDENTITY,
	message_email VARCHAR(40),
	message_phone VARCHAR(20)
);
CREATE TABLE customers
(
	 customer_id INT NOT NULL PRIMARY KEY IDENTITY,
	 customer_account VARCHAR(20) NOT NULL,
	 customer_passwd CHAR(64) NOT NULL,
	 message_id INT FOREIGN KEY REFERENCES message(message_id)
)
INSERT message(message_email, message_phone)
VALUES ('[e-mail]','15115111511');
INSERT customers(customer_account,customer_passwd,message_id)
VALUES ('test','80dea37cccca5fb56b9b78dbe2733fb19e8ee2aa7bb03d4ac1e361fe3fad7b51','1');

2.查询优化：

需要频繁的根据账号customer_account查询用户，所以需要给它建立索引

CREATE INDEX idx_cuacc
ON customers(customer_account);

3.密码安全：

将密码经过sha256运算后存入，规避明文存储密码的风险

二、构建项目

1.新建maven项目

file->new->project->Maven->org.a…-webapp

Name为项目名，GroupId一般取做公司名,其余不必更改

采用默认，直接finish

创建好的目录如下：

2.导入依赖

将pom.xml的相关依赖添加好，可以参考如下：

<?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>com.kingdom</groupId>
  <artifactId>SsmCase</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>SsmCase 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>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</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>
    <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>test</scope>
    </dependency>

    <dependency>
      <groupId>com.microsoft.sqlserver</groupId>
      <artifactId>mssql-jdbc</artifactId>
      <version>8.2.2.jre8</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>
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter</artifactId>
      <version>RELEASE</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>

  <build>
    <finalName>SsmCase</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>

        <!--        tomcat插件      -->
        <plugin>
          <groupId>org.apache.tomcat.maven</groupId>
          <artifactId>tomcat7-maven-plugin</artifactId>
          <version>2.2</version>
          <configuration>
            <port>8081</port>
            <path>/</path>
          </configuration>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

3.创建基本目录及文件

在main目录下面创建java和resources文件夹，并设置相应文件
右击main目录，new directory，会提示创建两个Maven的源目录，如果没有则自己建立，记得将新建目录mark为Source Root和Resource Root

创建类和接口

• 存放javabean的domain 包下的用户类：com.kingdom.domain.Customers
• 数据访问层 dao包下的用户 dao 接口：com.kingdom.dao.CustomersDao
• 业务层service包下的 CustomersService 接口：com.kingdom.service.CustomersService
• 业务层service 包下的 service实现类，继承service接口：com.kingdom.service.impl.CustomersServiceImpl
• 控制层controller包下的用户控制层CustomersController类：com.kingdom.controller.CustomersController
• 工具包util下用于安全加密的类：com.kingdom.util.Security

com.kingdom.domain.Customers

package com.kingdom.domain;

/**
 * @ClassName: Customers
 * @Author: LXW
 * @Date: 2021/7/20
 */

public class Customers 
    private Integer customer_id;
    private String customer_account;
    private String customer_passwd;
    private Integer message_id;

    public Integer getCustomer_id() 
        return customer_id;
    

    public void setCustomer_id(Integer customer_id) 
        this.customer_id = customer_id;
    

    public String getCustomer_account() 
        return customer_account;
    

    public void setCustomer_account(String customer_account) 
        this.customer_account = customer_account;
    

    public String getCustomer_passwd() 
        return customer_passwd;
    

    public void setCustomer_passwd(String customer_passwd) 
        this.customer_passwd = customer_passwd;
    

    public Integer getMessage_id() 
        return message_id;
    

    public void setMessage_id(Integer message_id) 
        this.message_id = message_id;
    

    @Override
    public String toString() 
        return "Customers" +
                "customer_id=" + customer_id +
                ", customer_account='" + customer_account + '\\'' +
                ", customer_passwd='" + customer_passwd + '\\'' +
                ", message_id=" + message_id +
                '';
    

com.kingdom.dao.CustomersDao

package com.kingdom.dao;

/**
 * @ClassName: CustomersDao
 * @Author: LXW
 * @Date: 2021/7/20
 */

public class CustomersDao 

com.kingdom.service.CustomersService

package com.kingdom.service;

/**
 * @ClassName: CustomersService
 * @Author: LXW
 * @Date: 2021/7/20
 */

public interface CustomersService 
    public String testString();

com.kingdom.service.impl.CustomersServiceImpl

package com.kingdom.service.impl;

import com.kingdom.service.CustomersService;
import org.springframework.stereotype.Service;

/**
 * @ClassName: CustomersServiceImpl
 * @Author: LXW
 * @Date: 2021/7/20
 */

@Service("customersService")
public class CustomersServiceImpl implements CustomersService 
    @Override
    public String testString() 
        return "Service层";
    
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