Frühling Java

• Holen Sie sich Spring Tools 4 für Eclipse und entpacken Sie es unten

java -jar spring-tool-suite-4-4.5.1.RELEASE-e4.14.0-win32.win32.x86_64.self-extracting.jar

• Fügen Sie bei Bedarf -vm zu SpringToolSuite4.ini hinzu

-vm
C:\Program Files\Java\jdk1.8.0_211\bin\javaw.exe

• Frühjahrsprojekterstellung

File → New → Spring Starter Project → Next → Überprüfen Sie Folgendes, um Webfunktionen und Hot Deployment zu verwenden

1. Developer Tools→Spring Boot DevTools
2. Web→Spring Web → Finish

pom.xml

<dependencies>
･ ･ ･
　<!-- web -->
　<dependency>
　　<groupId>org.springframework.boot</groupId>
　　<artifactId>spring-boot-starter-web</artifactId>
　</dependency>
　<!--Hot Deploy-->
　<dependency>
　　<groupId>org.springframework.boot</groupId>
　　<artifactId>spring-boot-devtools</artifactId>
　　<scope>runtime</scope>
　　<optional>true</optional>
　</dependency>
･ ･ ･
</dependencies>

IndexController.java

package com.example.demo;
import java.util.HashMap;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class IndexController {
	private static final Logger log = LoggerFactory.getLogger( IndexController.class );

    @RequestMapping("/")
    private String index() {
        return "index";
    }

    @RequestMapping(value="/", method=RequestMethod.GET)
    private Map<String, Object> index( @RequestParam("id") Integer id) {
        Map<String, Object> map = new HashMap<>();
        map.put("id", id);
        return map;
    }

    @RequestMapping(value="/items/{id}", method=RequestMethod.GET)
    private Item get(@PathVariable int id) {
    	return new Item(id);
    }

    @RequestMapping(value="/items", method=RequestMethod.POST)
    private void post(@RequestBody String body) {
    	log.info("post, " + body);
    }

    @RequestMapping(value="/items/{id}", method=RequestMethod.PUT)
    private void put(@PathVariable int id, @RequestBody String body) {
    	log.info("put, " + id + ", " + body);
    }

    @RequestMapping(value="/items/{id}", method=RequestMethod.DELETE)
    private void delete(@PathVariable("id") int id) {
    	log.info("delete, " + id);
    }

    public static class Item {
        private int id;

    	Item (int id) {
    		this.setId(id);
    	}

    	public int getId() {
    		return id;
    	}

    	public void setId(int id) {
    		this.id = id;
    	}
    }
}