从零开始搭建SSM框架

发布于 2021-07-06  751 次阅读


前言

      本文所提及文件 conf.zip

1.打开idea

2.create new project

 

等待载入相应web jar包

3.初始化完了以后再main文件夹下面创建java和resources,直接选择下面两个选项就行了

如果创建的文件夹是灰色的,执行下图操作

java文件夹选择source root ,resources选择resources root

然后再java文件夹下面创建以下包

其中service还有一个子包,叫impl或者core,service放接口,impl(core)放继承类

 

4.将以下三个文件拷贝到resources路径下并创建一个mapper文件夹(同一级别)

 

5.打开pom文件,此文件用于下载maven依赖

用下面表格里面的代码替换原pom的对应标签对,如截图

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <spring.version>4.3.4.RELEASE</spring.version>
    <!-- mybatis版本号 -->
    <mybatis.version>3.4.1</mybatis.version>
  </properties>

  <dependencies>
    <!-- 单元测试 -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
    </dependency>

    <dependency>
      <groupId>javax</groupId>
      <artifactId>javaee-api</artifactId>
      <version>7.0</version>
    </dependency>

    <!-- 单元测试 -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
    </dependency>

    <!-- 实现slf4j接口并整合 -->
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.2.3</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.7.25</version>
    </dependency>

    <!-- JSON -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.3</version>
    </dependency>


    <!-- 数据库 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.15</version>
      <scope>runtime</scope>
    </dependency>

    <!-- 数据库连接池 -->
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.2</version>
    </dependency>

    <!-- MyBatis -->
<!--    <dependency>-->
<!--      <groupId>org.mybatis</groupId>-->
<!--      <artifactId>mybatis</artifactId>-->
<!--      <version>${mybatis.version}</version>-->
<!--    </dependency>-->

<!--    &lt;!&ndash; mybatis/spring整合包 &ndash;&gt;-->
<!--    <dependency>-->
<!--      <groupId>org.mybatis</groupId>-->
<!--      <artifactId>mybatis-spring</artifactId>-->
<!--      <version>1.3.1</version>-->
<!--    </dependency>-->

    <!--mybatisplus-->
    <dependency>
      <groupId>com.baomidou</groupId>
      <artifactId>mybatis-plus</artifactId>
      <version>3.4.2</version>
    </dependency>
    <!-- Spring -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</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-tx</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-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-expression</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- 实现 jsp 页面的复用     -->
    <dependency>
      <groupId>com.googlecode.rapid-framework</groupId>
      <artifactId>rapid-core</artifactId>
      <version>4.0.5</version>
    </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>2.2.1</version>
      <scope>provided</scope>
    </dependency>
    <!-- jstl -->
    <dependency>
      <groupId>javax.servlet.jsp.jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <!-- jstl-api -->
    <dependency>
      <groupId>javax.servlet.jsp.jstl</groupId>
      <artifactId>jstl-api</artifactId>
      <version>1.2</version>
    </dependency>
    <!-- jstl-impl -->
    <dependency>
      <groupId>org.glassfish.web</groupId>
      <artifactId>jstl-impl</artifactId>
      <version>1.2</version>
    </dependency>

    <!-- standard -->
    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>

    <!-- jsf-api -->
    <dependency>
      <groupId>javax.faces</groupId>
      <artifactId>jsf-api</artifactId>
      <version>2.1</version>
      <scope>provided</scope>
    </dependency>

    <!-- jsf-api -->
    <!-- https://mvnrepository.com/artifact/javax.faces/jsf-impl -->
    <dependency>
      <groupId>javax.faces</groupId>
      <artifactId>jsf-impl</artifactId>
      <version>1.2_12</version>
    </dependency>


    <!-- commons系列包 -->
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-lang3</artifactId>
      <version>3.4</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.2</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-pool2 -->
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-pool2</artifactId>
      <version>2.8.1</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-dbcp2 -->
    <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-dbcp2 -->
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-dbcp2</artifactId>
      <version>2.1.1</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-dbcp -->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.4</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.4</version>
    </dependency>
    <!-- haspectjweaver -->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.9.6</version>
      <scope>runtime</scope>
    </dependency>
    <!--分页插件 -->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>5.2.0</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.apache.taglibs/taglibs-standard-impl -->
    <dependency>
      <groupId>org.apache.taglibs</groupId>
      <artifactId>taglibs-standard-impl</artifactId>
      <version>1.2.5</version>
    </dependency>
    <!--fastjson包-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.75</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.9.6</version>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.taglibs</groupId>
      <artifactId>taglibs-standard-spec</artifactId>
      <version>1.2.5</version>
    </dependency>
    <dependency>
      <groupId>org.apache.taglibs</groupId>
      <artifactId>taglibs-standard-impl</artifactId>
      <version>1.2.5</version>
    </dependency>

    <dependency>
      <groupId>org.apache.poi</groupId>
      <artifactId>poi</artifactId>
      <version>4.0.0</version>
    </dependency>
    <dependency>
      <groupId>org.apache.poi</groupId>
      <artifactId>poi-ooxml</artifactId>
      <version>4.0.0</version>
    </dependency>
    <dependency>
      <groupId>org.apache.poi</groupId>
      <artifactId>poi-ooxml-schemas</artifactId>
      <version>4.0.0</version>
    </dependency>
    <dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpclient</artifactId>
      <version>4.5.6</version>
    </dependency>
    <!-- 定时器jar包 -->
    <dependency>
      <groupId>org.quartz-scheduler</groupId>
      <artifactId>quartz</artifactId>
      <version>2.3.2</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!--网络请求-->
    <!--lombok插件-->
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.12</version>
      <scope>provided</scope>
    </dependency>


  </dependencies>

替换之后会出现下图所示的图标,点击更新依赖

 

6.更新依赖后在idea启用以下功能

 在此之前先下载lombok插件,小辣椒一样的图标(setting --> Plugins)

 

7.然后打开web.xml文件用以下代码全部替换

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
   http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
  <!-- 字符集过滤器 -->
  <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>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <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:springmvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet>
    <servlet-name>default</servlet-name>
    <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>
    <init-param>
      <param-name>debug</param-name>
      <param-value>0</param-value>
    </init-param>
    <init-param>
      <param-name>fileEncoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>listings</param-name>
      <param-value>false</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>springMVC</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <display-name></display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>

  <!--  <error-page>-->
  <!--    <error-code>404</error-code>-->
  <!--    <location>/page/error-page/404.jsp</location>-->
  <!--  </error-page>-->
  <!--  &lt;!&ndash;  <error-page>&ndash;&gt;-->
  <!--  &lt;!&ndash;    <error-code>500</error-code>&ndash;&gt;-->
  <!--  &lt;!&ndash;    <location>/page/error-page/500.jsp</location>&ndash;&gt;-->
  <!--  &lt;!&ndash;  </error-page>&ndash;&gt;-->
  <!--  <error-page>-->
  <!--    <error-code>405</error-code>-->
  <!--    <location>/page/error-page/405.jsp</location>-->
  <!--  </error-page>-->

</web-app>

web.xml其实就是javaweb的启动类,首先加载此文件,一般配置监听器拦截器等

后期详细讲解

8打开applicationContext.xml文件,这个文件是spring的配置文件

8.1

改成你项目的包名,这个是配置自动装配(注解)的扫描

8.2

这个修改为持久层所在的包,也就是包名+.mapper

8.3

这个是aop(面向切面编程)配置,修改为包名

9.打开springmvc.xml文件,此文件是springmvc的配置文件

后面讲解具体配置作用

9.1

 这个是配置控制层注解扫描,修改为包名+.controller

9.2

这一行很重要,没有这个配置会访问不到静态资源如css,js,html

10.最后来看database.properties这个文件,配置了数据库访问地址,账号密码,连接池等配置

一般只需要该账号密码和数据库

10.1

数据库驱动,这个是mysql最新驱动,8.0以上必须用这个,以下也可以用这个

10.2

数据库地址,mysql8.0以后需要指定时区

10.3

数据库账号密码

11.开始第一个controller层测试

 

package org.example.controller;

import com.alibaba.fastjson.JSONObject;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController {
    @RequestMapping(value = "test/{id}")
    public JSONObject test (@PathVariable("id")String id,String name){
        //id是通过地址获取,name是地址后面?跟的参数或者post的表单数据
        JSONObject jsonObject= new JSONObject();
        jsonObject.put("name",name);
        jsonObject.put("id",id);
        return jsonObject;
    }
}

 

示例项目为 Maven

 

mybatis_plus文档

https://mp.baomidou.com/guide/

未完待续。。。。。