SSM整合笔记
1，创建maven项目
创建maven项目过程省略
ps：如果创建完maven项目之后项目报错，可能是没有配置Tomcat
2，在pom.xml里面导入相应的jar的依赖
<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.junge</groupId> <artifactId>SSM1</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>SSM1 Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <!-- 导入springmvc --> <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.0.0.RELEASE</version> </dependency> <!-- spring-jdbc --> <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.0.0.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>5.0.0.RELEASE</version> </dependency> <!-- mybatis --> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.3</version> </dependency> <!-- 连接池commons-dbcp --> <!-- https://mvnrepository.com/artifact/commons-dbcp/commons-dbcp --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <!-- 数据库驱动 mysql --> <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.25</version> </dependency> <!-- mybatis-spring --> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.2</version> </dependency> <!-- jstl --> <!-- https://mvnrepository.com/artifact/jstl/jstl --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- js --> <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.9.4</version> </dependency> <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.9.0</version> </dependency> <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>2.9.0</version> </dependency> <!-- https://mvnrepository.com/artifact/com.google.code.gson/gson --> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.2</version> </dependency> <!-- log4j --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <!-- 文件上传 --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3</version> </dependency> <!-- 引入PageHelper分页插件 --> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>5.1.2</version> </dependency> </dependencies> <build> <finalName>SSM1</finalName> </build> </project>
3，构建基本目录
A：包目录
根据mvc分层思想，创建包目录
- action action表示控制层，用于接收请求，并返回数据或转发页面
- service service表示业务逻辑层，用于处理事务
- action接收请求后，会调用service层的函数做事务处理，代码逻辑的实现就写在service层
- dao dao表示持久层，用来写sql
- service层需要用到数据库数据时，会调用dao层的sql接口
- view view包下写实体类，就是有 set/get 函数的类。封装dao层取出来的数据为一个对象
B：后台页面目录
在srcmainwebappWEB-INF下创建一个目录
（该目录的名字随意取，该目录下存放页面文件
WEB-INF目录是不可见的，所以其下的文件是安全的
一般来讲存放的是需要登录后才可以访问的后台管理页面）
C：静态资源目录
在srcmainwebapp下创建一个目录
该目录的名字随意取，该目录下存放前端样式文件
D：默认首页
在srcmainwebapp下创建一个 index.jsp 文件
4，文件配置
A：数据库
在srcmain esources目录下创建数据库连接配置文件 db.properties(new一个file)
填写配置内容
oracle、mysql、sql server，3者的写法均不同变量名可以随意取，但是要注意，不能和系统内置的变量名起冲突等号右边的内容，不要加双引号或单引号
Mysql的配置
jdbc.driver= com.mysql.jdbc.Driver;//数据库驱动
jdbc.url =jdbc:mysql://localhost:3306/blog?characterEncoding=utf-8 //数据库地址（一般写ip地址）
jdbc.username = root //数据库用户名
jdbc.password =root //数据库密码
jdbc.driver= com.mysql.jdbc.Driver jdbc.url =jdbc:mysql://localhost:3306/blog?characterEncoding=utf-8 jdbc.username = root jdbc.password =root
B：spring-mybatis
在srcmain esources目录下创建spring-mybatis整合配置文件 spring-mybatis.xml
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<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd 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-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 http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd"> <!-- 引入数据库配置文件 --> <!-- <util:properties id="config" ></util:properties> --> <context:property-placeholder location="classpath:db.properties"/> <!-- 配置数据连接参数及连接池 --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}"></property> </bean> <!-- spring 集成mybaits 所以不用配置mybatis --> <!-- 配置SqlSessionFactoryBean --> <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 注入连接池 --> <property name="dataSource" ref="dataSource"/> <!-- 映射文件的位置 --> <property name="mapperLocations" value="classpath:mapper/*.xml"/> <!-- 分页插件pageHelper --> <property name="configLocation" value="classpath:mybatis-config.xml"></property> </bean> <!-- 该bean负责调用sqlsession的getMaper函数 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.junge.dao*"/> <!-- --> <!-- <property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryBean"></property> --> </bean> <!-- 开启事务注解驱动 --> <tx:annotation-driven/> <!-- 事务管理 --> <bean id="dataSourceTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> </beans>
C：spring-mvc
在srcmain esources目录下创建spring-mvc整合配置文件 spring-mvc.xml
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<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" 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-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/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd"> <!-- 启用注解驱动 --> <mvc:annotation-driven></mvc:annotation-driven> <!-- 处理静态资源 --> <mvc:default-servlet-handler /> <!-- 开启组件扫描 --> <context:component-scan base-package="com.junge.*" /> <!-- 配置视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/page/" /> <property name="suffix" value=".jsp" /> </bean> <!-- 拦截器 --> <mvc:interceptors> <!-- 多个拦截器顺序执行 登录认证拦截器 --> <mvc:interceptor> <mvc:mapping path="/**" /> <bean class="com.junge.interceptor.Interceptor" /> </mvc:interceptor> </mvc:interceptors> <!--全局异常处理 只要你实现了HandelExceptionResolver接口 ， 这个类就是一个全局异常处理类 --> <bean class="com.junge.exception.JExceptionResolver"></bean> <!-- 文件上传 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 设置默认编码 --> <property name="defaultEncoding" value="utf-8"></property> <!-- 上传文件总的大小最大为5M --> <property name="maxUploadSize" value="5242440"></property> </bean> </beans>
D：web.xml
找到srcmainwebappWEB-INF目录下的web.xml
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<!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> <!-- 字符过滤，防止post请求乱码 --> <filter> <filter-name>SpringCharacterEncodingFilter</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>SpringCharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- spring mvc 请求响应 --> <!-- The front controller of this Spring Web application, responsible for handling all application requests --> <servlet> <servlet-name>springDispatcherServlet</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><!-- 这么写会自动找到之前写的 spring-mybaits文件和spring-mvc文件 --> </init-param> <load-on-startup>1</load-on-startup> </servlet> <!-- Map all requests to the DispatcherServlet for handling --> <servlet-mapping> <servlet-name>springDispatcherServlet</servlet-name> <url-pattern>*.json</url-pattern> </servlet-mapping> <!-- 表示后台控制层接受。action和json结尾的请求 本项目中利用action请求转发页面 json请求转发json数据 --> <servlet-mapping> <servlet-name>springDispatcherServlet</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping> <!-- 配置静态资源文件路径 --> <servlet-mapping> <servlet-name>default</servlet-name><!-- 表示static目录下的文件都是静态文件 --> <url-pattern>/static/*</url-pattern><!-- 不配置的话，框架会认为这些文件的路径都是请求，导致无法访问 --> </servlet-mapping> <!-- 配置错误页面 --> <error-page> <error-code>403</error-code> <location>/WEB-INF/page/portal/403.jsp</location> </error-page> <error-page> <error-code>404</error-code> <location>/WEB-INF/page/portal/404.jsp</location> </error-page> <error-page> <error-code>500</error-code> <location>/WEB-INF/page/portal/500.jsp</location> </error-page> </web-app>
E：mybatis-config.xml
用来分页的配置文件（pagehelper）
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 引入分页插件 -->
<plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor">
<!-- 分页参数合理化 -->
<property name="reasonable" value="true"/>
</plugin>
</plugins>
</configuration>
5，访问测试
A：准备数据库数据
创建一个user表（oracle数据库里面user是关键字）
表数据
B：实体类（view）
在之前创建好的view包中创建User实体类
package com.ssm.view; public class User { private int user_id; private String user_name; private String user_password; public int getUser_id() { return user_id; } public void setUser_id(int user_id) { this.user_id = user_id; } public String getUser_name() { return user_name; } public void setUser_name(String user_name) { this.user_name = user_name; } public String getUser_password() { return user_password; } public void setUser_password(String user_password) { this.user_password = user_password; } }
C：dao层（接口）
在之前创建好的dao包中创建UserDao接口 并写登录的方法
package com.ssm.dao; import org.apache.ibatis.annotations.Param; import com.ssm.view.User; public interface UserDao { /** * 登录操作 * @param user_name 用户名 * @param user_password 密码 * @return */ public User login(@Param("user_name")String user_name,@Param("user_password")String user_password); }
在src/main/resources/路径下创建mapper文件夹 用来放mybatis dao的配置文件
创建xml文件 名称为UserDaomapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"
"http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">
<mapper namespace="com.ssm.dao.UserDao"><!-- 对应的dao包的类 -->
<!-- 建立sql查询结果字段与实体属性的映射关系 -->
<resultMap id="UserMap" type="com.ssm.view.User"><!-- 对应的实体类的路径 -->
<result column="user_id" property="user_id" />
<result column="user_name" property="user_name" />
<result column="user_password" property="user_password" />
</resultMap>
<select id="login" resultMap="UserMap">
SELECT
*
FROM
user
WHERE
user_name=#{user_name} and user_password=#{user_password}
</select>
</mapper>
D：service层
在之前创建好的service包中创建UserService类 写登录的方法
package com.ssm.service; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.ssm.dao.UserDao; import com.ssm.view.User; @Service("userService") public class UserService { @Autowired private UserDao userDao; /** * 登录操作 * @param user_name * @param user_password * @return */ public User login(String user_name,String user_password) { return userDao.login(user_name, user_password); } }
E：准备页面（登录）
之前创建的index页面
<%@ page language="java" contentType="text/html; charset=UTF-8" isELIgnored="false" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>登录页面</title> </head> <body> <form action="#" method="post"> 账号：<input type="text" id="user_name" name="user_name"><br> 密码：<input type="password" id="user_password" name="user_password"><br> <input type="submit" value="login"> </form> </body> </html>
在创建登录成功后的页面
<%@ page language="java" contentType="text/html; charset=UTF-8" isELIgnored="false" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>登录成功</title> </head> <body> hello </body> </html>
F：控制层（action/controller）
在之前创建好的action包里创建一个UserAction类
G：访问（省略）