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开发环境: macos IDEA 2021
mysql8.0, toma9.0
源码: https://download.csdn.net/download/a2267542848/19730797
新建后整个目录如下
选择tomcat server local
deployment添加artifacts exploded
war模式这种可以称之为是发布模式,看名字也知道,这是先打成war包,再发布
war exploded模式是直接把文件夹、jsp页面 、classes等等移到Tomcat 部署文件夹里面,进行加载部署。因此这种方式支持热部署,一般在开发的时候也是用这种方式。
从这里可以看到之后的访问路径
点击运行, 在会自动打开浏览器,如果出现下面的hello world 那证明当前环境没问题
在工程上右键, add framework support, 选择spring mvc , 会自动下载spring的库和添加WEB-INF下的配置
在main 下新建java和resources, 在src下新建test/java
点击到project structure为这些文件夹添加属性
java添加sources, resources添加Resources,test/java添加Tests
设置完之后会变颜色
在java下新建如下的目录,test也新建 com.ssm.kirito是包名字, 这是我取的
controller是控制器
dao是mapper interface
entity是pojo
exception是异常处理
service是 服务和impl实现
util是工具
mapper是mapper xml
spring是spring配置
新建配置如下图
通过如下方法添加spring xml 和jdbc.properties
在pom.xml中添加如下依赖
点击这图标会自动下载
注意数据库的版本,这个在下一章会讲
- <!-- 1.日志 -->
- <!-- 实现slf4j接口并整合 -->
- <dependency>
- <groupId>ch.qos.logback</groupId>
- <artifactId>logback-classic</artifactId>
- <version>1.1.1</version>
- </dependency>
-
- <!-- 2.数据库 -->
- <dependency>
- <groupId>mysql</groupId>
- <artifactId>mysql-connector-java</artifactId>
- <version>8.0.25</version>
- <scope>runtime</scope>
- </dependency>
- <dependency>
- <groupId>c3p0</groupId>
- <artifactId>c3p0</artifactId>
- <version>0.9.1.2</version>
- </dependency>
-
- <!-- DAO: MyBatis -->
- <dependency>
- <groupId>org.mybatis</groupId>
- <artifactId>mybatis</artifactId>
- <version>3.3.0</version>
- </dependency>
- <dependency>
- <groupId>org.mybatis</groupId>
- <artifactId>mybatis-spring</artifactId>
- <version>1.2.3</version>
- </dependency>
-
- <!-- 3.Servlet web -->
- <dependency>
- <groupId>taglibs</groupId>
- <artifactId>standard</artifactId>
- <version>1.1.2</version>
- </dependency>
- <dependency>
- <groupId>jstl</groupId>
- <artifactId>jstl</artifactId>
- <version>1.2</version>
- </dependency>
- <dependency>
- <groupId>com.fasterxml.jackson.core</groupId>
- <artifactId>jackson-databind</artifactId>
- <version>2.5.4</version>
- </dependency>
- <dependency>
- <groupId>javax.servlet</groupId>
- <artifactId>javax.servlet-api</artifactId>
- <version>3.1.0</version>
- </dependency>
-
- <!-- 4.Spring -->
- <!-- 1)Spring核心 -->
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-core</artifactId>
- <version>4.1.7.RELEASE</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-beans</artifactId>
- <version>4.1.7.RELEASE</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-context</artifactId>
- <version>4.1.7.RELEASE</version>
- </dependency>
- <!-- 2)Spring DAO层 -->
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-jdbc</artifactId>
- <version>4.1.7.RELEASE</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-tx</artifactId>
- <version>4.1.7.RELEASE</version>
- </dependency>
- <!-- 3)Spring web -->
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-web</artifactId>
- <version>4.1.7.RELEASE</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-webmvc</artifactId>
- <version>4.1.7.RELEASE</version>
- </dependency>
- <!-- 4)Spring test -->
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-test</artifactId>
- <version>4.1.7.RELEASE</version>
- </dependency>
-
- <!-- redis客户端:Jedis -->
- <dependency>
- <groupId>redis.clients</groupId>
- <artifactId>jedis</artifactId>
- <version>2.7.3</version>
- </dependency>
- <dependency>
- <groupId>com.dyuproject.protostuff</groupId>
- <artifactId>protostuff-core</artifactId>
- <version>1.0.8</version>
- </dependency>
- <dependency>
- <groupId>com.dyuproject.protostuff</groupId>
- <artifactId>protostuff-runtime</artifactId>
- <version>1.0.8</version>
- </dependency>
-
- <!-- Map工具类 -->
- <dependency>
- <groupId>commons-collections</groupId>
- <artifactId>commons-collections</artifactId>
- <version>3.2</version>
- </dependency>
我用的是mysql8.0.25, 如果是低版本就用com.mysql.jdbc.Driver
数据库名字是book
注意不要用引号,不要有空格
- jdbc.driver=com.mysql.cj.jdbc.Driver
- jdbc.url=jdbc:mysql://localhost:3306/book?useSSL=true&characterEncoding=utf-8&serverTimezone=GMT
- jdbc.username=root
- jdbc.password=123
logback.xml 文件修改如下
- <?xml version="1.0" encoding="UTF-8"?>
- <configuration debug="true">
- <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
- <!-- encoders are by default assigned the type ch.qos.logback.classic.encoder.PatternLayoutEncoder -->
- <encoder>
- <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
- </encoder>
- </appender>
-
- <root level="debug">
- <appender-ref ref="STDOUT" />
- </root>
- </configuration>
mybatis-config.xml文件修改如下
- <?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>
- <!-- 配置全局属性 -->
- <settings>
- <!-- 使用jdbc的getGeneratedKeys获取数据库自增主键值 -->
- <setting name="useGeneratedKeys" value="true" />
-
- <!-- 使用列别名替换列名 默认:true -->
- <setting name="useColumnLabel" value="true" />
-
- <!-- 开启驼峰命名转换:Table{create_time} -> Entity{createTime} -->
- <setting name="mapUnderscoreToCamelCase" value="true" />
- </settings>
- </configuration>
注意com.ssm.kirito替换为自己的包
spring-dao.xml修改如下
- <?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"
- 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">
- <!-- 配置整合mybatis过程 -->
- <!-- 1.配置数据库相关参数properties的属性:${url} -->
- <context:property-placeholder location="classpath:jdbc.properties" />
-
- <!-- 2.数据库连接池 -->
- <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
- <!-- 配置连接池属性 -->
- <property name="driverClass" value="${jdbc.driver}" />
- <property name="jdbcUrl" value="${jdbc.url}" />
- <property name="user" value="${jdbc.username}" />
- <property name="password" value="${jdbc.password}" />
-
- <!-- c3p0连接池的私有属性 -->
- <property name="maxPoolSize" value="30" />
- <property name="minPoolSize" value="10" />
- <!-- 关闭连接后不自动commit -->
- <property name="autoCommitOnClose" value="false" />
- <!-- 获取连接超时时间 -->
- <property name="checkoutTimeout" value="10000" />
- <!-- 当获取连接失败重试次数 -->
- <property name="acquireRetryAttempts" 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" />
- <!-- 配置MyBaties全局配置文件:mybatis-config.xml -->
- <property name="configLocation" value="classpath:mybatis-config.xml" />
- <!-- 扫描entity包 使用别名 -->
- <property name="typeAliasesPackage" value="com.ssm.kirito.entity" />
- <!-- 扫描sql配置文件:mapper需要的xml文件 -->
- <property name="mapperLocations" value="classpath:mapper/*.xml" />
- </bean>
-
- <!-- 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">
- <!-- 注入sqlSessionFactory -->
- <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
- <!-- 给出需要扫描Dao接口包 -->
- <property name="basePackage" value="com.ssm.kirito.dao" />
- </bean>
- </beans>
spring-service.xml修改如下
- <?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:tx="http://www.springframework.org/schema/tx"
- 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/tx
- http://www.springframework.org/schema/tx/spring-tx.xsd">
- <!-- 扫描service包下所有使用注解的类型 -->
- <context:component-scan base-package="com.ssm.kirito.service" />
-
- <!-- 配置事务管理器 -->
- <bean id="transactionManager"
- class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
- <!-- 注入数据库连接池 -->
- <property name="dataSource" ref="dataSource" />
- </bean>
-
- <!-- 配置基于注解的声明式事务 -->
- <tx:annotation-driven transaction-manager="transactionManager" />
- </beans>
spring-web.xml修改如下
- <?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: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
- http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
- <!-- 配置SpringMVC -->
- <!-- 1.开启SpringMVC注解模式 -->
- <!-- 简化配置:
- (1)自动注册DefaultAnootationHandlerMapping,AnotationMethodHandlerAdapter
- (2)提供一些列:数据绑定,数字和日期的format @NumberFormat, @DateTimeFormat, xml,json默认读写支持
- -->
- <mvc:annotation-driven />
-
- <!-- 2.静态资源默认servlet配置
- (1)加入对静态资源的处理:js,gif,png
- (2)允许使用"/"做整体映射
- -->
- <mvc:default-servlet-handler/>
-
- <!-- 3.配置jsp 显示ViewResolver -->
- <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>
-
- <!-- 4.扫描web相关的bean -->
- <context:component-scan base-package="com.ssm.kirito.controller" />
- </beans>
删除applicationContext.xml和dispatcher.servlet.xml
修改web.xml如下, 只有修改了这个 spring才有效
- <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_3_1.xsd"
- version="3.1" metadata-complete="true">
- <!-- 如果是用mvn命令生成的xml,需要修改servlet版本为3.1 -->
- <!-- 配置DispatcherServlet -->
- <servlet>
- <servlet-name>mvc-dispatcher</servlet-name>
- <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
- <!-- 配置springMVC需要加载的配置文件
- spring-dao.xml,spring-service.xml,spring-web.xml
- Mybatis - > spring -> springmvc
- -->
- <init-param>
- <param-name>contextConfigLocation</param-name>
- <param-value>classpath:spring/spring-*.xml</param-value>
- </init-param>
- </servlet>
- <servlet-mapping>
- <servlet-name>mvc-dispatcher</servlet-name>
- <!-- 默认匹配所有的请求 -->
- <url-pattern>/</url-pattern>
- </servlet-mapping>
- </web-app>
到目前为止,我们的环境已经搭建好了, 现在开始加入编写数据库,然后编写对象,和control, 和jsp等
可以进入到nvcat手动新建一个book的数据库, 表名字为book, 然后插入数据
也可以执行SQL语句
- CREATE DATABASE `book`;
-
- USE `book`;
-
- DROP TABLE IF EXISTS `book`;
- CREATE TABLE `book` (
- `id` int(11) NOT NULL AUTO_INCREMENT,
- `filename` varchar(40) NOT NULL,
- `fileurl` varchar(255) NOT NULL,
- `isdel` int(4) NOT NULL,
- PRIMARY KEY (`id`)
- ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
-
-
- INSERT INTO `book` VALUES ('1', 'book1', '345', '0');
- INSERT INTO `book` VALUES ('2', 'book2', '123', '1');
这个是上面的sql对应的对象, 这个和mapper 可以用工具生成
- package com.ssm.kirito.entity;
-
- public class Book {
- /**
- * 上传的文件
- */
- private Integer id;
-
- /**
- * 文件名称
- */
- private String filename;
-
- /**
- * 文件地址
- */
- private String fileurl;
-
- /**
- * 是否删除(0否 1是)
- */
- private Integer isdel;
-
- public Integer getId() {
- return id;
- }
-
- public void setId(Integer id) {
- this.id = id;
- }
-
- public String getFilename() {
- return filename;
- }
-
- public void setFilename(String filename) {
- this.filename = filename;
- }
-
- public String getFileurl() {
- return fileurl;
- }
-
- public void setFileurl(String fileurl) {
- this.fileurl = fileurl;
- }
-
- public Integer getIsdel() {
- return isdel;
- }
-
- public void setIsdel(Integer isdel) {
- this.isdel = isdel;
- }
- }
这是对数据库的具体操作,比如查找,插入等
dao/BookDao.java
- package com.ssm.kirito.dao;
-
- import com.ssm.kirito.entity.Book;
-
- public interface BookDao {
- Book selectByPrimaryKey(Integer id);
- }
对应的具体实现resources/mapper/BookMapper.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.ssm.kirito.dao.BookDao">
- <resultMap id="BaseResultMap" type="com.ssm.kirito.entity.Book">
- <!--@mbg.generated-->
- <!--@Table file-->
- <id column="id" jdbcType="INTEGER" property="id" />
- <result column="filename" jdbcType="VARCHAR" property="filename" />
- <result column="fileurl" jdbcType="VARCHAR" property="fileurl" />
- <result column="isdel" jdbcType="INTEGER" property="isdel" />
- </resultMap>
- <sql id="Base_Column_List">
- <!--@mbg.generated-->
- id, filename, fileurl, isdel
- </sql>
- <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
- <!--@mbg.generated-->
- select
- <include refid="Base_Column_List" />
- from book
- where id = #{id,jdbcType=INTEGER}
- </select>
- </mapper>
这是具体的服务
service/BookService.java
- package com.ssm.kirito.service;
-
- import com.ssm.kirito.entity.Book;
-
- public interface BookService {
- Book findbook(Integer id);
- }
具体的实现 service/impl/BookServiceImpl.java
- package com.ssm.kirito.service.impl;
-
- import com.ssm.kirito.dao.BookDao;
- import com.ssm.kirito.entity.Book;
- import com.ssm.kirito.service.BookService;
- import org.springframework.beans.factory.annotation.Autowired;
- import org.springframework.stereotype.Service;
-
- @Service
- public class BookServiceImpl implements BookService {
- @Autowired
- private BookDao bookDao;
- @Override
- public Book findbook(Integer id) {
- return bookDao.selectByPrimaryKey(id);
- }
- }
在web下新建jsp
WEB-INF/jsp/show.jsp
- <%@ page contentType="text/html;charset=UTF-8" language="java" %>
- <html>
- <head>
- <title>Title</title>
- </head>
- <body>
- <h3>展示数据</h3>
- <div>文件id:${book.id}</div>
- <div>文件名称:${book.filename}</div>
- <div>文件地址:${book.fileurl}</div>
- </body>
- </html>
controller/BookController.java
- package com.ssm.kirito.controller;
-
- import com.ssm.kirito.entity.Book;
- import com.ssm.kirito.service.BookService;
- import org.springframework.beans.factory.annotation.Autowired;
- import org.springframework.stereotype.Controller;
- import org.springframework.web.bind.annotation.RequestMapping;
-
- import javax.servlet.http.HttpServletRequest;
-
- @Controller
- @RequestMapping("/getbook")
- public class BookController {
- @Autowired
- private BookService bookService;
-
- @RequestMapping("test")
- public String getDataById(HttpServletRequest request){
- Integer id = 1;
- Book book = bookService.findbook(id);
- request.setAttribute("book",book);
- return "show";
- }
- }
访问路径为: /getbook/test 就会去数据库请求ID为1的数据, 就会返回show.jsp
到此所有的工作已经完成, 平时不建议用JSP, 实际上用前后端分离
本项目代码为: https://download.csdn.net/download/a2267542848/19730797
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