springboot（1）- 純 java 編寫 SSM

• 不需要 spring 的xml
• 不需要 web.xml

1 新建工程

2 pom

<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.tzb</groupId>
    <artifactId>javassm</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.1.6.RELEASE</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
            <scope>provided</scope>
        </dependency>

    </dependencies>

</project>

3 配置類

3.1 spring 配置類

package com.tzb.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.stereotype.Controller;

@Configuration
@ComponentScan(basePackages = "com.tzb", useDefaultFilters = true,
        excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION, classes = Controller.class)})
public class SpringConfig {


}

3.2 spring mvc 配置類

package com.tzb.config;


import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.stereotype.Controller;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

@Configuration
@ComponentScan(basePackages = "com.tzb", useDefaultFilters = false,
        includeFilters = {
                @ComponentScan.Filter(type = FilterType.ANNOTATION, classes = Controller.class),
                @ComponentScan.Filter(type = FilterType.ANNOTATION, classes = Configuration.class)})
public class SpringMVCConfig extends WebMvcConfigurationSupport {

    /**
     * 配置靜態資源
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**")
                .addResourceLocations("classpath:/static/");
    }
}

3.3 web 配置類

package com.tzb.config;

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

public class WebInit implements WebApplicationInitializer {

    public void onStartup(javax.servlet.ServletContext servletContext) throws ServletException {
        AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
        ctx.setServletContext(servletContext);
        ctx.register(SpringMVCConfig.class);
        ServletRegistration.Dynamic springmvc = servletContext.addServlet("springmvc", new DispatcherServlet(ctx));
        springmvc.addMapping("/");
        springmvc.setLoadOnStartup(1);
    }
}

4 Service

package com.tzb.service;

import org.springframework.stereotype.Service;

@Service
public class HelloService {

    public String sayHello() {
        return "Hello";
    }
}

5 Controller

package com.tzb.controller;

import com.tzb.service.HelloService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @Autowired
    private HelloService helloService;

    @GetMapping("/hello")
    public String hello(){
        return helloService.sayHello();
    }
}

---

---