第一步:使用Maven搭建项目,并在pom.xml中导入SSM需要使用到的依赖包
<!--单元测试依赖-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!--Servlet依赖-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.0</version>
<scope>provided</scope>
</dependency>
<!--jstl依赖-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--mysql数据库驱动依赖-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<!--c3p0依赖-->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<!--spring-webmvc依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.0.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.0.8.RELEASE</version>
</dependency>
<!--mybatis依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
<!--mybatis-spring依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
<!-- jedis (一个redis client端的jar)-->
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.0</version>
</dependency>
<!--fastjson依赖-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.7</version>
</dependency>
<build>
<finalName>ssm_02</finalName>
<!--如果是使用idea,请加上这段代码是访问包的静态文件-->
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
</resources>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.0.0</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>3.7.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.20.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.0</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>
第二步:在项目中创建包
根据自己建包习惯而定
第三步:在resources中创建db.properties(数据库配置文件,名字可以自定义)
#定义数据库驱动
drivers=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/db_a?useUnicode=true&characterEncoding=UTF-8
user=root
userpassword=root
#定义初始连接数
initPoolSize=3
#定义最大连接数
maxPoolSizes=30
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000
第四步:在resources中创建spring.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--自动扫描:自动扫描com.heyang.ssm包下所有类的注解-->
<context:component-scan base-package="com.heyang.ssm"/>
<!--加载db.properties-->
<context:property-placeholder location="classpath:db.properties"></context:property-placeholder>
<!--配置数据源 从c3p0-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${drivers}"></property>
<property name="jdbcUrl" value="${url}"></property>
<property name="user" value="${user}"></property>
<property name="initialPoolSize" value="${initPoolSize}"></property>
<property name="maxPoolSize" value="${maxPoolSizes}"></property>
</bean>
<!--配置SqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--加载数据源-->
<property name="dataSource" ref="dataSource"></property>
<!--加载MyBatis配置文件-->
<property name="configLocation" value="classpath:mybatis-Config.xml"></property>
<!--加载所有映射文件-->
<property name="mapperLocations" value="classpath:com/heyang/ssm/mapper/*.xml"></property>
<!--typeAliasesPackage对应实体类所在的包,这个时候会自动取包名作为别名-->
<property name="typeAliasesPackage" value="com.heyang.ssm.pojo"></property>
</bean>
<!--配置Dao层:spring注入这个bean-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--将sqlSessionFactory注入com.zking.dao包的类中,dao包中的类直接使用sqlSessionFactory-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
<property name="basePackage" value="com.heyang.ssm.dao"></property>
</bean>
<!-- 事务管理 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
第五步:在pojo包中创建实体类
package com.heyang.ssm.pojo;
import java.io.Serializable;
public class User implements Serializable {
private Integer userId;
private String userName;
private String userPassword;
public User(Integer userId, String userName, String userPassword) {
this.userId = userId;
this.userName = userName;
this.userPassword = userPassword;
}
public User(String userName, String userPassword) {
this.userName = userName;
this.userPassword = userPassword;
}
public User() {
}
public Integer getUserId() {
return userId;
}
public void setUserId(Integer userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserPassword() {
return userPassword;
}
public void setUserPassword(String userPassword) {
this.userPassword = userPassword;
}
@Override
public String toString() {
return "User{" +
"userId=" + userId +
", userName='" + userName + '\'' +
", userPassword='" + userPassword + '\'' +
'}';
}
}
第六步:在dao包中创建接口,编写方法
package com.heyang.ssm.dao;
import com.heyang.ssm.pojo.User;
import java.util.List;
public interface UserDao {
/**
* 增加
* @param user
* @return
*/
public int addUser(User user);
/**
* 删除
* @param user
* @return
*/
public int deleteUser(Integer user);
/**
* 修改
* @param user
* @return
*/
public int updateUser(User user);
/**
* 根据ID查询
* @param userId
* @return
*/
public User getUserById(Integer userId);
/**
* 得到所有的用户
* @return
*/
public List<User> getAllUser();
/**
* 综合查询
* @param user
* @return
*/
public List<User> getUser(User user);
}
第七步:在mappier包中创建实体类的Mapper文件:UserMapper.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.heyang.ssm.dao.UserDao">
<insert id="addUser" parameterType="User">
INSERT INTO T_USER VALUES(NULL,#{userName},#{userPassword})
</insert>
<delete id="deleteUser" parameterType="integer">
DELETE FROM T_USER WHERE USER_ID = #{userId}
</delete>
<select id="getAllUser" resultType="User">
SELECT USER_ID,USER_NAME FROM T_USER
</select>
<select id="getUserById" parameterType="integer" resultType="User" >
SELECT USER_ID,USER_NAME FROM T_USER WHERE USER_ID=#{userId}
</select>
<update id="updateUser" parameterType="User">
<if test="userPassword!=''">
UPDATE T_USER SET USER_NAME=#{userName},USER_PASSWORD=#{userPassword} WHERE USER_ID=#{userId}
</if>
<if test="userPassword==''">
UPDATE T_USER SET USER_NAME=#{userName} WHERE USER_ID=#{userId}
</if>
</update>
<select id="getUser" parameterType="User" resultType="User">
SELECT USER_ID,USER_NAME FROM T_USER WHERE 1=1
<if test="userId!='' and userName==''">
AND USER_ID=#{userId}
</if>
<if test="userName!='' and userId=='' ">
AND USER_NAME LIKE "%"#{userName}"%"
</if>
<if test="userId!='' and userName!='' ">
AND USER_ID=#{userId} AND USER_NAME LIKE "%"#{userName}"%"
</if>
</select>
<!--<resultMap id="userMapper" type="com.heyang.ssm.pojo.User">-->
<!--<id property="userId" column="USER_ID" />-->
<!--<result property="userName" column="USER_NAME" />-->
<!--</resultMap>-->
</mapper>
第八步:在service中创建接口,在impl包中创建接口的实现类
package com.heyang.ssm.service;
import com.heyang.ssm.pojo.User;
import java.util.List;
public interface UserService {
/**
* 增加
* @param user
* @return
*/
public int addUser(User user);
/**
* 得到所有的用户
* @return
*/
public List<User> getAllUser();
/**
* 根据ID查询
* @param userId
* @return
*/
public User getUserById(Integer userId);
/**
* 修改
* @param user
* @return
*/
public int updateUser(User user);
/**
* 删除
* @param user
* @return
*/
public int deleteUser(Integer user);
/**
* 综合查询
* @param user
* @return
*/
public List<User> getUser(User user);
}
service实现类
package com.heyang.ssm.service.impl;
import com.heyang.ssm.dao.UserDao;
import com.heyang.ssm.pojo.User;
import com.heyang.ssm.service.UserService;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.List;
@Service("userService")
public class UserServiceImpl implements UserService {
@Resource
private UserDao userDao;
@Override
public int addUser(User user) {
return userDao.addUser(user);
}
@Override
public List<User> getAllUser() {
return userDao.getAllUser();
}
@Override
public User getUserById(Integer userId) {
return userDao.getUserById(userId);
}
@Override
public int updateUser(User user) {
return userDao.updateUser(user);
}
@Override
public int deleteUser(Integer user) {
return userDao.deleteUser(user);
}
@Override
public List<User> getUser(User user) {
return userDao.getUser(user);
}
}
第九步:配置web.xml
<?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"
id="WebApp_ID" version="3.1">
<!--加载spring.xml文件-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
<!--配置编码过滤器 防止乱码-->
<filter>
<filter-name>encodingFilter</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>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--spring mvc前端控制器-->
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<!--spring监听器-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>
接下来大家可以去写一个登陆注册的案例去实测一下