10分钟 SSM项目转成SpringBoot 项目教程

avatar 2021年04月02日11:22:43 0 143 views

前端时间帮朋友开发的SSM房屋租赁系统,后来有朋友要求改造成SpringBoot版本。

于是,这就开搞。

项目介绍地址:新品 SSM/SpringBoot房屋租赁系统,房屋合租系统(ssm和springboot多版本)

一、结构对比

1、SSM项目结构

2、SpringBoot版本

下面开始介绍代码修改

二、 修改 pom.xml

1、SSM的pom.xml

<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.example</groupId>
    <artifactId>Verio</artifactId>
    <packaging>war</packaging>
    <version>1.0.0-SNAPSHOT</version>
    <name>Verio Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    
    <dependencies>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.22</version>
        </dependency>

        <!-- 添加sevlet支持 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <!-- 添加jsp支持 -->
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.1</version>
        </dependency>
        <!-- 添加jstl支持 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.1.2</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>
        <!-- 添加spring支持 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>
        <!--spring test支持-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>
        <!--spring mvc支持-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>

        <!--spring 事务管理支持-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>
        <!--spring jdbc操作支持-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>
        <!--spring aop编程支持-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>


        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>

        
        <!-- mybatis-plus begin -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>3.1.2</version>
        </dependency>

        <!--  jdbc驱动包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.11</version>
        </dependency>
        <!-- 添加阿里巴巴连接池Druid支持 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.16</version>
        </dependency>
        <!-- 添加log4j日志 -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.21</version>
        </dependency>
        <!-- apache共公包 -->
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- 添加junit支持 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.2.2</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>

        <!-- jackson -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.5.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.5.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.5.0</version>
        </dependency>
        <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.9.13</version>
        </dependency>

        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20170516</version>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.4</version>
        </dependency>

        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>4.2.1</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.72</version>
        </dependency>

        <!-- 图片操作 -->
        <dependency>
            <groupId>net.coobird</groupId>
            <artifactId>thumbnailator</artifactId>
            <version>0.4.8</version>
        </dependency>

        <!-- hutool工具包 -->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>4.1.13</version>
        </dependency>


        <!-- 邮件 -->
        <dependency>
            <groupId>io.github.biezhi</groupId>
            <artifactId>oh-my-email</artifactId>
            <version>0.0.3</version>
        </dependency>

    </dependencies>



    <repositories>
        <repository>
            <id>aliyun</id>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>aliyun</id>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
        </pluginRepository>
    </pluginRepositories>

    <build>
        <finalName>Verio</finalName>
        <resources>
            <!-- 编译之后包含xml -->
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
            <!-- 编译之后包含xml和properties -->
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>


</project>

2、SpringBoot的pom.xml

<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.example</groupId>
    <artifactId>Verio-boot</artifactId>
    <packaging>jar</packaging>
    <version>1.0.0-SNAPSHOT</version>
    <name>Verio Maven Webapp</name>
    <url>http://maven.apache.org</url>


    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.7.RELEASE</version>
        <relativePath/>
    </parent>


    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <druid.version>1.1.10</druid.version>
        <lombok.version>1.18.2</lombok.version>
        <commons-lang3.version>3.8</commons-lang3.version>
        <hutool-all.version>4.1.13</hutool-all.version>
    </properties>


    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>

        <!-- mybatis-plus begin -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!--mybatis-plus end-->

        <!-- mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>


        <!-- druid数据源 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>${druid.version}</version>
        </dependency>

        <!-- Lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
            <scope>provided</scope>
        </dependency>


        <!-- commons-lang3工具包 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>${commons-lang3.version}</version>
        </dependency>

        <!-- hutool工具包 -->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>${hutool-all.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

        <!--序列化-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.72</version>
        </dependency>

        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>26.0-jre</version>
        </dependency>

        <!--Shiro-->
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>1.4.0</version>
        </dependency>

        <!--thymeleaf-shiro-extras-->
        <dependency>
            <groupId>com.github.theborakompanioni</groupId>
            <artifactId>thymeleaf-extras-shiro</artifactId>
            <version>2.0.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.5</version>
        </dependency>

        <!-- 邮件 -->
        <dependency>
            <groupId>io.github.biezhi</groupId>
            <artifactId>oh-my-email</artifactId>
            <version>0.0.3</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <scope>compile</scope>
        </dependency>

        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>compile</scope>
        </dependency>

    </dependencies>

    <repositories>
        <repository>
            <id>aliyun</id>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>aliyun</id>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
        </pluginRepository>
    </pluginRepositories>

    <build>
        <finalName>verio</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <fork>true</fork>
                </configuration>
            </plugin>
        </plugins>
    </build>


</project>

 

我这里是直接找到之前的一个springboot项目的依赖,拷贝进来的

注意需要引入 tomcat-embed-jasper,这个是内置tomcat解析jsp的依赖

这里主要是引入一下springboot的依赖

 

三、配置文件

1、删除原来的 SSM 所有配置文件,添加 application.yml

server:
  port: 8080
  forward-headers-strategy: true
  servlet:
    session:
      timeout: 86400

spring:
  transaction:
    rollback-on-commit-failure: true
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    #MySql配置
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/verio?serverTimezone=Asia/Shanghai&characterEncoding=utf8&useSSL=false&allowMultiQueries=true
    username: root
    password: 123456
  servlet:
    multipart:
      max-file-size: 2MB
      max-request-size: 20MB
mybatis-plus:
  mapper-locations: classpath*:/mapper/**Mapper.xml
  #实体扫描,多个package用逗号或者分号分隔
  typeAliasesPackage: com.example.ssm.rental.entity
  global-config:
    #主键类型  0:"数据库ID自增", 1:"用户输入ID",2:"全局唯一ID (数字类型唯一ID)", 3:"全局唯一ID UUID";
    id-type: 0
    #字段策略 0:"忽略判断",1:"非 NULL 判断"),2:"非空判断"
    field-strategy: 2
    #驼峰下划线转换
    db-column-underline: true
    #刷新mapper 调试神器
    refresh-mapper: true
    #逻辑删除配置(下面3个配置)
    logic-delete-value: 1
    logic-not-delete-value: 0
  configuration:
    map-underscore-to-camel-case: true
    cache-enabled: true

logging:
  file: ./logs/log.log
  level:
    org:
      springframework:
        boot:
          autoconfigure: error

2、静态资源映射和拦截器 web配置

注意,我把之前的静态文件包assets放到了resources/static里面,需要映射一下

包括上传目录也可以一起映射一下

还有就是之前在spring-mvc.xml里配置的拦截器,也可以用java config配置一起改了

package com.example.ssm.rental.common.config;

import com.example.ssm.rental.common.constant.Constant;
import com.example.ssm.rental.common.interceptor.AdminInterceptor;
import com.example.ssm.rental.common.interceptor.CustomerInterceptor;
import com.example.ssm.rental.common.interceptor.OwnerInterceptor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.*;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

/**
 * @author liuyanzhao
 */
@Slf4j
@Configuration
@EnableWebMvc
public class MvcConfig implements WebMvcConfigurer {


    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/assets/**")
                .addResourceLocations("classpath:/static/assets/");
        registry.addResourceHandler("/uploads/**")
                .addResourceLocations("file:///" + Constant.UPLOADS_PATH);
    }

    @Bean
    public InternalResourceViewResolver setupViewResolver(){
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/jsp/");
        resolver.setSuffix(".jsp");
        return resolver;

    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {

        registry.addInterceptor(new AdminInterceptor())
                .addPathPatterns("/admin/user")
                .addPathPatterns("/admin/user")
                .addPathPatterns("/admin/news")
                .addPathPatterns("/admin/news")
                .addPathPatterns("/admin/feedback/reply/submit")
                .addPathPatterns("/admin/house/checkPass")
                .addPathPatterns("/admin/house/checkReject");

        registry.addInterceptor(new OwnerInterceptor())
                .addPathPatterns("/admin/house")
                .addPathPatterns("/admin/house");

        registry.addInterceptor(new CustomerInterceptor())
                .addPathPatterns("/admin/order")
                .addPathPatterns("/admin/order")
                .addPathPatterns("/admin/order");
        // ...省略   
    }


}

 

四、添加启动类

Application.java

package com.example.ssm.rental;

import lombok.extern.slf4j.Slf4j;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.scheduling.annotation.EnableScheduling;

/**
 * <pre>
 *     SENS run!
 * </pre>
 *
 * @author : saysky
 * @date : 2019/11/14
 */
@Slf4j
@SpringBootApplication
@EnableScheduling
@MapperScan("com.example.ssm.rental.mapper")
public class Application {
    public static void main(String[] args) {
        ApplicationContext context = SpringApplication.run(Application.class, args);
        String serverPort = context.getEnvironment().getProperty("server.port");
        log.info("Verio started at http://localhost:" + serverPort);
    }

}

从其他springboot项目中拷贝一个启动类过来,修改一下mapperScan的包名

 

然后直接运行,如果遇到报错,可以再检查下有没有遗漏的地方,如扫包包名错了,无法获取数据源啦,什么的。

有可能是其他的ssm的一些java config有问题,删除掉就行。因为springboot已经有了很多自动配置

 

五、可能会遇到的报错

1、Could not resolve view with name 'xx' in servlet with name dispa......

这个报错是因为找不到前端模板路径,在application.yml里配置 spring.mvc.view的prefix和suffix似乎无效

需要在配置类里加入配置

    @Bean
    public InternalResourceViewResolver setupViewResolver(){
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/jsp/");
        resolver.setSuffix(".jsp");
        return resolver;
    }

注意给你的webapp目录设置web模块,即webapp目录是蓝色有圆点的

如果不是,请做如下配置,在Facets里添加Web,指定webapp目录

2、前端静态资源404,即页面无样式

这个是因为你配置的静态资源映射有问题,即映射和实际引用的不一致。

我的配置如下

registry.addResourceHandler("/assets/**")
                .addResourceLocations("classpath:/static/assets/");

 

前端引用代码如下

<link href="/assets/css/styles.css" rel="stylesheet">
<script src="/assets/js/jquery.min.js"></script>

 

至此,我们就转换完毕了

个人觉得如果你熟练的话10分钟是差不多的,当然里面一些问题需要逐一分析啦!

基本是一个简单的ssm+jsp的项目能这样快速转成springboot啦!

当然springboot要转成ssm也差不多啦!工作量会稍微大一丢丢!

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