IDEA实现SSM分布式编程实现用户登录、增删改查

1.首先我们要新建一个项目（箭头指向处不要打勾），点击Next

2.我们要在项目根目录处新建ssm_bean,ssm_dao,ssm_service三个module

这里箭头处也不要勾选，直接点击Next

填写module名

点击完成（ssm_dao,ssm_service与ssm_bean步骤一致）

3.在根目录下新建ssm_web1module，这里我们要进行勾选，并选择webapp，点击Next

填写module名

最后目录如下所示

4.修改根目录的pom.xml文件

pom.xml代码如下：

<?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.zhongruan</groupId>
    <artifactId>ssm_parent</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>ssm_bean</module>
        <module>ssm_dao</module>
        <module>ssm_service</module>
        <module>ssm_web1</module>
    </modules>
    <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版本号 -->
        <spring.version>5.0.2.RELEASE</spring.version>
        <!-- mybatis版本号 -->
        <mybatis.version>3.2.6</mybatis.version>
        <!-- log4j日志文件管理包版本 -->
        <slf4j.version>1.7.7</slf4j.version>
        <log4j.version>1.2.17</log4j.version>
        <c3p0.version>0.9.5.2</c3p0.version>
        <taglibs.version>1.1.2</taglibs.version>
    </properties>

    <dependencies>
        <!-- spring核心包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

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

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

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- mybatis核心包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <!-- mybatis/spring包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.2.2</version>
        </dependency>
        <!-- 导入java ee jar 包 -->
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
        </dependency>

        <!-- 导入Mysql数据库链接jar包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.30</version>
        </dependency>
        <!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 -->
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.2.2</version>
        </dependency>
        <!-- JSTL标签类 -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- 日志文件管理包 -->
        <!-- log start -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>


        <!-- 数据连接池 -->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>${c3p0.version}</version>
        </dependency>

        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>${taglibs.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>

        <!-- 导入servlet-api/jsp -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api -->
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.1</version>
            <scope>provided</scope>
        </dependency>

    </dependencies>

</project>

5.在ssm_bean下的src/main/java处新建com.zhongruan.bean包

输入包名

在bean包下新建Userinfo.java类

Userinfo类中代码如下

package com.zhongruan.bean;

public class Userinfo {
    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 "Userinfo{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

6.在smm_dao的src/main/java处新建com.zhongruan.dao包（跟上述步骤一致）

然后澡dao包处新建IUserDao接口，输入接口名IUserDao

IUserDao类代码如下：

package com.zhongruan.dao;

import com.zhongruan.bean.Userinfo;

import java.util.List;

public interface IUserDao {
    public Userinfo doLogin(Userinfo userinfo);

    public int toAddUser(Userinfo userinfo);

    public List<Userinfo> findAll();

    public int delete(int id);

    public Userinfo findById(int id);

    public int update(Userinfo userinfo);
}

然后在src/main/resources中新建mapper包，在mapper中新建usermapper.xml文件，代码如下

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.zhongruan.dao.IUserDao" >

<select id="doLogin" parameterType="com.zhongruan.bean.Userinfo"
        resultType="com.zhongruan.bean.Userinfo">
    select * from userinfo where username=#{username} and password=#{password}
</select>

    <insert id="toAddUser" parameterType="com.zhongruan.bean.Userinfo">
        insert into userinfo values (#{id},#{username},#{password})
    </insert>

    <select id="findAll" resultType="com.zhongruan.bean.Userinfo">
    select * from userinfo
    </select>

    <delete id="delete" parameterType="com.zhongruan.bean.Userinfo">
         delete from userinfo where id=#{id}
    </delete>

    <select id="findById" resultType="com.zhongruan.bean.Userinfo">
        select * from userinfo where id=#{id}
    </select>

    <update id="update" parameterType="com.zhongruan.bean.Userinfo">
         update userinfo set username=#{username},password=#{password} where id=#{id}
    </update>
</mapper>

7.在ssm_service的src/main/java下新建com.zhongruan.service包

然后在service包下新建IUserService接口，代码如下

package com.zhongruan.service;

import com.zhongruan.bean.Userinfo;

import java.util.List;

public interface IUserService {
    public boolean doLogin(Userinfo userinfo);

    public int toAddUser(Userinfo userinfo);

    public List<Userinfo> findAll();

    public int delete(int id);

    public Userinfo findById(int id);

    public int update(Userinfo userinfo);
}

在service下新建impl包，然后在impl包下新建UserService实现类，代码如下

package com.zhongruan.service.impl;

import com.zhongruan.bean.Userinfo;
import com.zhongruan.dao.IUserDao;
import com.zhongruan.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class UserService implements IUserService {

    @Autowired
    private IUserDao userDao;

    @Override
    public boolean doLogin(Userinfo userinfo) {
        Userinfo userinfo1=userDao.doLogin(userinfo);
        if(null!=userinfo1){
            return true;
        }else{
            return false;
        }
    }

    @Override
    public int toAddUser(Userinfo userinfo) {
        return userDao.toAddUser(userinfo);
    }

    @Override
    public List<Userinfo> findAll() {
        return userDao.findAll();
    }

    @Override
    public int delete(int id) {
        return userDao.delete(id);
    }

    @Override
    public Userinfo findById(int id) {
        return userDao.findById(id);
    }

    @Override
    public int update(Userinfo userinfo) {
        return userDao.update(userinfo);
    }
}

8.首先将ssm_web1的java设置为sources-root

将resources设置为Resources-root（步骤跟上述相似）

然后在resource包下新建applicationContext.xml,db.properties,log4j.properties和spring-mv.xml文件

applicationContext.xml代码如下

<?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-4.3.xsd
		http://www.springframework.org/schema/context
		http://www.springframework.org/schema/context/spring-context-4.3.xsd
		http://www.springframework.org/schema/aop
		http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
		http://www.springframework.org/schema/tx
		http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
    <!-- 1.配置数据库相关参数properties的属性：${url} -->
    <context:property-placeholder location="classpath:db.properties"/>

    <!-- 2.配置数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="2"/>
    </bean>

    <!-- 3.配置SqlSessionFactory对象 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 扫描bean包 使用别名 -->
        <property name="typeAliasesPackage" value="com.zhongruan.bean"></property>

        <!--配置加载映射文件 UserMapper.xml-->
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>

    </bean>

    <!-- 自动生成dao,mapper-->
    <!-- 4.配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 给出需要扫描Dao接口包 -->
        <property name="basePackage" value="com.zhongruan.dao"/>
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>



    <!--自动扫描-->
    <context:component-scan base-package="com.zhongruan"/>


    <!-- 配置事务-->
    <!-- 5.配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!-- 6.开启事务注解-->
    <tx:annotation-driven></tx:annotation-driven>

</beans>

db.properties代码如下（这是数据库配置文件）jdbctest为数据库名，username和password分别为用户名和密码

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/jdbctest?useSSL=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=123456

log4j.properties代码如下

# 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

spring-mv.xml代码如下

<?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:mvc="http://www.springframework.org/schema/mvc"
       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-4.3.xsd
      http://www.springframework.org/schema/mvc
      http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context-4.3.xsd
      http://www.springframework.org/schema/aop
      http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
      http://www.springframework.org/schema/tx
      http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

    <!-- 1.注解扫描位置-->
    <context:component-scan base-package="com.zhongruan.controller" />

    <!-- 2.配置映射处理和适配器-->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>

    <!-- 3.视图的解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/pages/" />
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

修改webapp/web-inf的web.xml文件，代码如下

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

  <!-- 配置加载类路径的配置文件 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath*:applicationContext.xml</param-value>
  </context-param>

  <!-- 配置监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <listener>
    <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
  </listener>

  <!-- 解决中文乱码过滤器 -->
  <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>

  <!-- 前端控制器（加载classpath:spring-mvc.xml 服务器启动创建servlet） -->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!-- 配置初始化参数，创建完DispatcherServlet对象，加载springmvc.xml配置文件 -->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
    <!-- 服务器启动的时候，让DispatcherServlet对象创建 -->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

</web-app>

然后在webapp根目录新建自己的前端文件，这里太多了无法给出，请读者自己编写，或者下载我上传的 页面.rar资源，然后直接copy过去就行了。

9.最后配置tomcat

点击上方的 Run 选项，选择Edit Configuration

选择default -> tomcat -> local 选择下载安装到本地的tomcat服务器的地址

切换到Deployment选项页 点击 + 号选择 Arctifact 

添加项目名

最后在Application context 中选择 空白 那一项，点击 Apply 应用。

10.最后切换到index.jsp界面，右键运行项目

运行结果如图

登录成功页面为：

用户管理界面为：