ssm快速入门框架使用，一篇解决环境搭建快速上手,拿来即用

SSM整合配置

开发规划

环境要求

Idea,Mysql5.7,Tomcat 9,Maven 3.8,Lombok

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配置流程

项目搭建->MySQL->Mybatis->Spring->SpringMVC->web.xml

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搭建项目目录

• com.cxy.pojo 实体类(映射数据表)
• com.cxy.mapper 数据操作层(数据库CRUD)
• com.cxy.service 业务层
• com.cxy.controller 控制层

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配置文件

项目搭建

• pom.xml中导入jar包
• pom.xml中设置Maven资源过滤

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MySQL

• 搭建数据库和数据表

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Mybatis

mybatis-config.xml

配置、连接、绑定、操作数据库

• 用于配置数据源（交给Spring管理）
• 日志输出
• 数据库相关配置
• 数据关联：数据表与pojo关联
• 数据操作：与mapper（Dao）层的mapper.xml关联CRUD操作

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database.properties

用于配置数据库连接的用户名和密码

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Spring

applicationContext.xml

Spring 整合配置文件

• 用于整合spring-dao.xml,spring-service.xml,spring-mvc.xml

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spring-dao.xml

与dao层关联

• 关联数据库配置文件:database.properties
• 配置数据库连接池
• 配置SqlSessionFactory对象，绑定mybatis-config.xml文件
• 配置扫描dao层包，动态实现dao接入注入spring容器

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spring-service.xml

与service层关联

• 配置扫描service层包
• 将service层注入实现类注入IOC容器
• 配置事务管理器
• 配置AOP事务支持

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SpringMVC

spring-mvc.xml

与controller关联

• 开启注解扫描，解决json乱码问题
• 配置静态资源默认servlet处理
• 配置视图解析器
• 配置扫描controller层包

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web.xml

• 配置SpringMVC分发器：DispatcherServlet
• 配置乱码过滤
• 配置Session过期时间

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配置数据库

database.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/student_manager?useSSL=true&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123456

搭建项目目录

用maven导入jar包

<dependencies>
        
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <version>1.18.18version>
        dependency>
        
        <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <version>4.12version>
        dependency>
        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>5.1.46version>
        dependency>
        
        <dependency>
            <groupId>com.mchangegroupId>
            <artifactId>c3p0artifactId>
            <version>0.9.5.2version>
        dependency>

        
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>servlet-apiartifactId>
            <version>2.5version>
        dependency>
        <dependency>
            <groupId>javax.servlet.jspgroupId>
            <artifactId>jsp-apiartifactId>
            <version>2.2version>
        dependency>
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>jstlartifactId>
            <version>1.2version>
        dependency>

        
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatisartifactId>
            <version>3.5.2version>
        dependency>
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatis-springartifactId>
            <version>2.0.2version>
        dependency>

        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webmvcartifactId>
            <version>5.3.4version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-jdbcartifactId>
            <version>5.3.4version>
        dependency>
        
        <dependency>
            <groupId>org.aspectjgroupId>
            <artifactId>aspectjweaverartifactId>
            <version>1.8.9version>
        dependency>
        
        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>fastjsonartifactId>
            <version>1.2.62version>
        dependency>

        <dependency>
            <groupId>log4jgroupId>
            <artifactId>log4jartifactId>
            <version>1.2.17version>
        dependency>
    dependencies>
    <build>
        <resources>
            <resource>
                <directory>src/main/javadirectory>
                <includes>
                    <include>**/*.propertiesinclude>
                    <include>**/*.xmlinclude>
                includes>
                <filtering>falsefiltering>
            resource>
            <resource>
                <directory>src/main/resourcesdirectory>
                <includes>
                    <include>**/*.propertiesinclude>
                    <include>**/*.xmlinclude>
                includes>
                <filtering>falsefiltering>
            resource>
        resources>
    build>

Mybatis

mybatis-config.xml

        DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true" />
        <setting name="logImpl" value="LOG4J" />
    settings>
    <typeAliases>
        <package name="com.cxy.pojo"/>
    typeAliases>
    <mappers>
        <mapper resource="com/cxy/mapper/mapperXml/UsersMapper.xml"/>
        <mapper resource="com/cxy/mapper/mapperXml/InstituteMapper.xml"/>
        <mapper resource="com/cxy/mapper/mapperXml/DomainsMapper.xml"/>
    mappers>
configuration>

Spring

spring-dao.xml

<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"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

        
        
        <context:property-placeholder location="classpath:database.properties"/>

        
        
        <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="10"/>
            
            <property name="autoCommitOnClose" value="false"/>
            
            <property name="checkoutTimeout" value="10000"/>
            
            <property name="acquireRetryAttempts" value="2"/>
        bean>

        
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            
            <property name="dataSource" ref="dataSource"/>
            
            <property name="configLocation" value="classpath:mybatis-config.xml"/>

        bean>

        
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
            
            <property name="basePackage" value="com.cxy.mapper"/>
        bean>
beans>

spring-service.xml

<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"
        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

">

        
        <context:component-scan base-package="com.cxy.service" />

        
        <bean id="usersServiceImpl" class="com.cxy.service.impl.UsersServiceImpl">
            <property name="usersMapper" ref="usersMapper"/>
        bean>
        <bean id="domainsServiceImpl" class="com.cxy.service.impl.DomainsServiceImpl">
            <property name="domainsMapper" ref="domainsMapper"/>
        bean>
        <bean id="instituteServiceImpl" class="com.cxy.service.impl.InstituteServiceImpl">
            <property name="instituteMapper" ref="instituteMapper"/>
        bean>

        
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            
            <property name="dataSource" ref="dataSource" />
        bean>

beans>

spring-mvc.xml

<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
        https://www.springframework.org/schema/mvc/spring-mvc.xsd">

        
        
        <mvc:annotation-driven >
            <mvc:message-converters>
                <bean id="fastJsonHttpMessageConverter" class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
                    <property name="supportedMediaTypes">
                        <list>
                            <value>text/html;charset=UTF-8value>
                            <value>application/json;charset=UTF-8value>
                        list>
                    property>
                bean>
            mvc:message-converters>
        mvc:annotation-driven>

        
        <mvc:default-servlet-handler/>

        
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
         <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
         <property name="prefix" value="/WEB-INF/jsp/"/>
         <property name="suffix" value=".jsp"/>
        bean>

        
        <context:component-scan base-package="com.cxy.controller" />
        <mvc:resources location="/static/" mapping="/static/**"/>

beans>

applicationContext.xml

<beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">
    <import resource="spring-dao.xml"/>
    <import resource="spring-service.xml"/>
    <import resource="spring-mvc.xml"/>
beans>

web.xml

<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_4_0.xsd"
         version="4.0">
    
    <servlet>
        <servlet-name>DispatcherServletservlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
        <init-param>
            <param-name>contextConfigLocationparam-name>
            <param-value>classpath:applicationContext.xmlparam-value>
        init-param>
        <load-on-startup>1load-on-startup>
    servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServletservlet-name>
        <url-pattern>/url-pattern>
    servlet-mapping>

    
    <filter>
        <filter-name>encodingFilterfilter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
        <init-param>
            <param-name>encodingparam-name>
            <param-value>utf-8param-value>
        init-param>
    filter>
    <filter-mapping>
        <filter-name>encodingFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    <session-config>
        <session-timeout>15session-timeout>
    session-config>
web-app>

log4j.properties

#//注意这里不要用INFO，DEBUG等 改个名字
log4j.rootLogger=infoA,errorA,stdout,DEBUGA

#过滤掉spring框架下的额外日志
log4j.category.org.springframework = WARN

#输出到控制台
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.Threshold = debug
log4j.appender.stdout.layout.ConversionPattern=%d %-5p %c{1}:%L - %m%n
#c3p0
log4j.logger.com.mchange.v2.async.ThreadPoolAsynchronousRunner = ERROR  
#打印sql语句
log4j.logger.com.ibatis=DEBUG
log4j.logger.java.sql.ResultSet=INFO
log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=DEBUG
log4j.logger.com.ibatis.common.jdbc.ScriptRunner=DEBUG
log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=DEBUG
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG

项目结构

实体类User

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Users {
    private int uId;
    private String uName;
    private int uAge;
    private int uStatus;
    private int uRole;
    private String uPassword;
    private int dId;
    private int iId;
    private String iName;
    private String dName;
}

Mapper(Dao层)

@Mapper
public interface UsersMapper {
    //用户管理的时候需要查看所有用户
    List<Users> selectAllUsers();

    //用户的登陆的验证
    Users selectUsersLogin(@Param("uName") String uName, @Param("uPassword") String uPassword);

    //验证用户是否存在
    int selectUserIsExit(@Param("uName") String uName);

    //注册/新增一个新用户
    int insertNewUser(@Param("users") Users users);

    //连表查询的查询所有用户
    List<Users> selectAllUsers1();

    //删除某一个用户
    int deleteOneUser(@Param("uId") int uId);

    //获取未审核的所有用户
    List<Users> selectNoPass();

    //审核某一用户
    int updateUser(@Param("uId") int uId);

    //查询某一个用户
    Users selectUserById(@Param("uId")int uId);

    //修改用户信息
    int upadateUserMsg(@Param("users")Users users);
}

mapper.xml

<?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.cxy.mapper.UsersMapper">
  <!--换成Users类的全限定名-->
    <select id="selectAllUsers" resultType="com.cxy.pojo.Users">
        select * from users
    </select>
    <select id="selectUsersLogin" resultType="Users" parameterType="java.lang.String">
        select u_id,u_name,u_role,u_password,u_status,u_age,d_id,i_id from users where u_name=#{uName} and u_password=#{uPassword} and u_status=1;
    </select>
    <select id="selectUserIsExit" resultType="int" parameterType="Users">
        select count(*) from users where u_name=#{uName};
    </select>
    <insert id="insertNewUser" parameterType="Users">
        insert into users(u_name,u_age,u_password,d_id,i_id) values(#{users.uName},#{users.uAge},#{users.uPassword},#{users.dId},#{users.iId});
    </insert>
    <select id="selectAllUsers1" resultType="Users" >
        select * from users as u,institute as i,domains as d
        where u.i_id=i.i_id and u.d_id=d.d_id
    </select>
    <delete id="deleteOneUser" parameterType="int">
        delete from users where u_id=#{uId}
    </delete>
    <select id="selectNoPass" resultType="Users">
        select * from users where u_status=0;
    </select>
    <update id="updateUser" parameterType="int">
        UPDATE users
        SET u_status=1
        WHERE u_id=#{uId};
    </update>
    <select id="selectUserById" parameterType="int" resultType="Users">
        select * from users as u,institute as i,domains as d
        where u.i_id=i.i_id and u.d_id=d.d_id and u.u_id=#{uId}
    </select>
    <update id="upadateUserMsg" parameterType="Users" >
        update users set u_name=#{users.uName},u_age=#{users.uAge},u_status=#{users.uStatus},d_id=#{users.dId},i_id=#{users.iId} where u_id=#{users.uId}
    </update>
</mapper>

注意

• ResultType要使用全限定类名
• 查询不能使用 * 去查询
• int类型的数据要是用Integer

userService(Service层)

public interface UsersService {
    //用户管理的时候需要查看所有用户
    List<Users> selectAllUsers();

    //用户的登陆的验证
    Users selectUsersLogin(String uName,String uPassword);

    //验证用户是否存在
    int selectUserIsExit(String uName);
    //注册/新增一个新用户
    int insertNewUser(Users users);

    //连表查询的查询所有用户
    List<Users> selectAllUsers1();

    //删除某一个用户
    int deleteOneUser(int uId);

    //获取未审核的所有用户
    List<Users> selectNoPass();

    //审核某一用户
    int updateUser(int uId);

    //查询某一个用户
    Users selectUserById(int uId);

    //修改用户信息
    int upadateUserMsg(Users users);
}

userServiceImpl

@Service
public class UsersServiceImpl implements UsersService {

    private UsersMapper usersMapper;

    public void setUsersMapper(UsersMapper usersMapper) {
        this.usersMapper = usersMapper;
    }


    @Override
    public List<Users> selectAllUsers() {
        return usersMapper.selectAllUsers();
    }

    @Override
    public Users selectUsersLogin(String uName, String uPassword) {
        return usersMapper.selectUsersLogin(uName,uPassword);
    }

    @Override
    public int selectUserIsExit(String uName) {
        return usersMapper.selectUserIsExit(uName);
    }

    @Override
    public int insertNewUser(Users users) {
        return usersMapper.insertNewUser(users);
    }

    @Override
    public List<Users> selectAllUsers1() {
        return usersMapper.selectAllUsers1();
    }

    @Override
    public int deleteOneUser(int uId) {
        return usersMapper.deleteOneUser(uId);
    }

    @Override
    public List<Users> selectNoPass() {
        return usersMapper.selectNoPass();
    }

    @Override
    public int updateUser(int uId) {
        return usersMapper.updateUser(uId);
    }

    @Override
    public Users selectUserById(int uId) {
        return usersMapper.selectUserById(uId);
    }

    @Override
    public int upadateUserMsg(Users users) {
        return usersMapper.upadateUserMsg(users);
    }
}

注意:
@Service注解注入bean要放在serviceImpl下面

测试

public class TestNew {
    @Test
    public void test(){
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
        UsersServiceImpl usersService=(UsersServiceImpl) ctx.getBean("usersServiceImpl");
        //DomainsServiceImpl domainsService=(DomainsServiceImpl) ctx.getBean("domainsServiceImpl");
        Users users = usersService.selectUserById(2);
        System.out.println(users);
    }
}