Spring Boot - 服务组件 Spring Boot - 文件处理 Spring Boot - Thymeleaf Service Components是包含@Service注释的类文件。这些类文件用于在不同的层中编写业务逻辑,与@RestController类文件分开。此处显示了创建服务组件类文件的逻辑 public interface ProductService { } 使用@Service注释实现接口的类如下所示 @Service public class ProductServiceImpl implements ProductService { } 请注意,在本教程中,我们使用Product Service API来存储,检索,更新和删除产品。我们在@RestController类文件中编写了业务逻辑。现在,我们将把业务逻辑代码从控制器移动到服务组件。 您可以使用如下所示的代码创建包含添加,编辑,获取和删除方法的接口 package com.codingdict.demo.service; import java.util.Collection; import com.codingdict.demo.model.Product; public interface ProductService { public abstract void createProduct(Product product); public abstract void updateProduct(String id, Product product); public abstract void deleteProduct(String id); public abstract Collection<Product> getProducts(); } 以下代码将允许您创建一个使用@Service批注实现ProductService接口的类,并编写业务逻辑以存储,检索,删除和更新产品。 package com.codingdict.demo.service; import java.util.Collection; import java.util.HashMap; import java.util.Map; import org.springframework.stereotype.Service; import com.codingdict.demo.model.Product; @Service public class ProductServiceImpl implements ProductService { private static Map<String, Product> productRepo = new HashMap<>(); static { Product honey = new Product(); honey.setId("1"); honey.setName("Honey"); productRepo.put(honey.getId(), honey); Product almond = new Product(); almond.setId("2"); almond.setName("Almond"); productRepo.put(almond.getId(), almond); } @Override public void createProduct(Product product) { productRepo.put(product.getId(), product); } @Override public void updateProduct(String id, Product product) { productRepo.remove(id); product.setId(id); productRepo.put(id, product); } @Override public void deleteProduct(String id) { productRepo.remove(id); } @Override public Collection<Product> getProducts() { return productRepo.values(); } } 这里的代码显示了Rest Controller类文件,这里我们@Autowired了ProductService接口并调用了方法。 package com.codingdict.demo.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.http.HttpStatus; import org.springframework.http.ResponseEntity; 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.RestController; import com.codingdict.demo.model.Product; import com.codingdict.demo.service.ProductService; @RestController public class ProductServiceController { @Autowired ProductService productService; @RequestMapping(value = "/products") public ResponseEntity<Object> getProduct() { return new ResponseEntity<>(productService.getProducts(), HttpStatus.OK); } @RequestMapping(value = "/products/{id}", method = RequestMethod.PUT) public ResponseEntity<Object> updateProduct(@PathVariable("id") String id, @RequestBody Product product) { productService.updateProduct(id, product); return new ResponseEntity<>("Product is updated successsfully", HttpStatus.OK); } @RequestMapping(value = "/products/{id}", method = RequestMethod.DELETE) public ResponseEntity<Object> delete(@PathVariable("id") String id) { productService.deleteProduct(id); return new ResponseEntity<>("Product is deleted successsfully", HttpStatus.OK); } @RequestMapping(value = "/products", method = RequestMethod.POST) public ResponseEntity<Object> createProduct(@RequestBody Product product) { productService.createProduct(product); return new ResponseEntity<>("Product is created successfully", HttpStatus.CREATED); } } POJO类的代码 - Product.java在这里显示 package com.codingdict.demo.model; public class Product { private String id; private String name; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } } 下面给出了一个主要的Spring Boot应用程序 package com.codingdict.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); } } Maven build的代码 - pom.xml如下所示 <?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.codingdict</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>demo</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.8.RELEASE</version> <relativePath/> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.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> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> Gradle Build - build.gradle的代码如下所示 buildscript { ext { springBootVersion = '1.5.8.RELEASE' } repositories { mavenCentral() } dependencies { classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}") } } apply plugin: 'java' apply plugin: 'eclipse' apply plugin: 'org.springframework.boot' group = 'com.codingdict' version = '0.0.1-SNAPSHOT' sourceCompatibility = 1.8 repositories { mavenCentral() } dependencies { compile('org.springframework.boot:spring-boot-starter-web') testCompile('org.springframework.boot:spring-boot-starter-test') } 您可以创建可执行的JAR文件,并使用下面给出的Maven或Gradle命令运行Spring Boot应用程序 对于Maven,使用如下所示的命令 mvn clean install 在“BUILD SUCCESS”之后,您可以在目标目录下找到JAR文件。 对于Gradle,您可以使用如下所示的命令 gradle clean build 在“BUILD SUCCESSFUL”之后,您可以在build / libs目录下找到JAR文件。 使用下面给出的命令运行JAR文件 java –jar <JARFILE> 现在,应用程序已在Tomcat端口8080上启动,如下图所示 现在点击POSTMAN应用程序中的以下URL,您可以看到如下所示的输出 GET API URL是 - http://localhost:8080/products POST API URL是 - http://localhost:8080/products PUT API URL是 - http://localhost:8080/products/3 DELETE API URL是 - http://localhost:8080/products/3 Spring Boot - 文件处理 Spring Boot - Thymeleaf