Rest模板用于创建使用RESTful Web服务的应用程序.您可以使用 exchange()方法为所有HTTP方法使用Web服务.下面给出的代码显示了如何创建Bean for Rest模板以自动连接Rest Template对象.
package com.it1352.demo; import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.context.annotation.Bean;import org.springframework.web.client.RestTemplate;@SpringBootApplicationpublic class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); } @Bean public RestTemplate getRestTemplate() { return new RestTemplate(); }}
GET
使用RestTemplate使用GET API - exchange()方法
假设此URL http://localhost:8080/products 返回以下JSON,我们将使用此使用以下代码使用Rest模板进行API响应 :
[ { "id": "1", "name": "Honey" }, { "id": "2", "name": "Almond" }]
您必须按照给定的点数消耗API :
自动发送Rest模板对象.
使用HttpHeaders设置请求标题.
使用HttpEntity包装请求对象.
为Exchange()方法提供URL,HttpMethod和Return类型.
@RestControllerpublic class ConsumeWebService { @Autowired RestTemplate restTemplate; @RequestMapping(value = "/template/products") public String getProductList() { HttpHeaders headers = new HttpHeaders(); headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON)); HttpEntityentity = new HttpEntity (headers); return restTemplate.exchange(" http://localhost:8080/products", HttpMethod.GET, entity, String.class).getBody(); }}
POST
使用RestTemplate消费POST API - exchange()方法
假设此URL http://localhost:8080/products 返回如下所示的响应,我们将使用此使用Rest模板进行API响应.
下面给出的代码是Request body :
{ "id":"3", "name":"Ginger"}
给出的代码以下是回复正文 :
Product is created successfully
您必须按照以下给出的点来使用API :
自动装配Rest模板对象.
使用HttpHeaders设置请求标题.
使用HttpEntity包装请求对象.在这里,我们将Product对象包装起来发送给请求体.
为exchange()方法提供URL,HttpMethod和Return类型.
@RestControllerpublic class ConsumeWebService { @Autowired RestTemplate restTemplate; @RequestMapping(value = "/template/products", method = RequestMethod.POST) public String createProducts(@RequestBody Product product) { HttpHeaders headers = new HttpHeaders(); headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON)); HttpEntityentity = new HttpEntity (product,headers); return restTemplate.exchange( "http://localhost:8080/products", HttpMethod.POST, entity, String.class).getBody(); }}
PUT
使用RestTemplate消费PUT API - exchange()方法
假设此URL http://localhost:8080/products/3 返回以下响应,我们将消耗这个API响应使用Rest Template.
下面给出的代码是Request body :
{ "name":"Indian Ginger"}
下面给出的代码是Response body :
Product is updated successfully
您必须按照以下给出的点来消费API :
自动装配休息模板对象.
使用HttpHeaders设置请求标头.
使用HttpEntity包装请求对象.在这里,我们将Product对象包装起来发送给请求体.
为exchange()方法提供URL,HttpMethod和Return类型.
@RestControllerpublic class ConsumeWebService { @Autowired RestTemplate restTemplate; @RequestMapping(value = "/template/products/{id}", method = RequestMethod.PUT) public String updateProduct(@PathVariable("id") String id, @RequestBody Product product) { HttpHeaders headers = new HttpHeaders(); headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON)); HttpEntityentity = new HttpEntity (product,headers); return restTemplate.exchange( "http://localhost:8080/products/"+id, HttpMethod.PUT, entity, String.class).getBody(); }}
DELETE
使用RestTemplate消费DELETE API - exchange()方法
假设此URL http://localhost:8080/products/3 返回下面给出的响应,我们将使用Rest Template消耗此API响应.
下面显示的这行代码是Response body :
Product is deleted successfully
您必须按照以下显示的点消费API :
自动装配Rest模板对象.
使用HttpHeaders设置请求标头.
使用HttpEntity来包装请求对象.
提供URL,HttpMethod和Return用于exchange()方法的类型.
@RestControllerpublic class ConsumeWebService { @Autowired RestTemplate restTemplate; @RequestMapping(value = "/template/products/{id}", method = RequestMethod.DELETE) public String deleteProduct(@PathVariable("id") String id) { HttpHeaders headers = new HttpHeaders(); headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON)); HttpEntityentity = new HttpEntity (headers); return restTemplate.exchange( "http://localhost:8080/products/"+id, HttpMethod.DELETE, entity, String.class).getBody(); }}
完整的Rest Template Controller类文件在下面和下面给出;
package com.it1352.demo.controller; import java.util.Arrays;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.http.HttpEntity;import org.springframework.http.HttpHeaders;import org.springframework.http.HttpMethod;import org.springframework.http.MediaType;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 org.springframework.web.client.RestTemplate;import com.it1352.demo.model.Product;@RestControllerpublic class ConsumeWebService { @Autowired RestTemplate restTemplate; @RequestMapping(value = "/template/products") public String getProductList() { HttpHeaders headers = new HttpHeaders(); headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON)); HttpEntityentity = new HttpEntity (headers); return restTemplate.exchange( "http://localhost:8080/products", HttpMethod.GET, entity, String.class).getBody(); } @RequestMapping(value = "/template/products", method = RequestMethod.POST) public String createProducts(@RequestBody Product product) { HttpHeaders headers = new HttpHeaders(); headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON)); HttpEntity entity = new HttpEntity (product,headers); return restTemplate.exchange( "http://localhost:8080/products", HttpMethod.POST, entity, String.class).getBody(); } @RequestMapping(value = "/template/products/{id}", method = RequestMethod.PUT) public String updateProduct(@PathVariable("id") String id, @RequestBody Product product) { HttpHeaders headers = new HttpHeaders(); headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON)); HttpEntity entity = new HttpEntity (product,headers); return restTemplate.exchange( "http://localhost:8080/products/"+id, HttpMethod.PUT, entity, String.class).getBody(); } @RequestMapping(value = "/template/products/{id}", method = RequestMethod.DELETE) public String deleteProduct(@PathVariable("id") String id) { HttpHeaders headers = new HttpHeaders(); headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON)); HttpEntity entity = new HttpEntity (headers); return restTemplate.exchange( "http://localhost:8080/products/"+id, HttpMethod.DELETE, entity, String.class).getBody(); }}
Spring Boot Application Class的代码 - DemoApplication.java在下面给出 :
package com.it1352.demo; import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); }}
Maven build的代码 - pom.xml在下面给出 :
4.0.0 com.IT屋 demo 0.0.1-SNAPSHOT jar demo Demo project for Spring Boot org.springframework.boot spring-boot-starter-parent 1.5.8.RELEASE UTF-8 UTF-8 1.8 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin
Gradle Build - build.gradle的代码在下面给出 :
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.it1352'version = '0.0.1-SNAPSHOT'sourceCompatibility = 1.8repositories { mavenCentral()}dependencies { compile('org.springframework.boot:spring-boot-starter-web') testCompile('org.springframework.boot:spring-boot-starter-test')}
您可以创建一个可执行的JAR文件,并使用以下Maven运行Spring Boot应用程序或Gradle命令 :
对于Maven,您可以使用下面给出的命令 :
mvn clean install
在"BUILD SUCCESS"之后,您可以在目标目录下找到JAR文件.
For Gradle ,你可以使用下面显示的命令 :
gradle clean build
在"BUILD SUCCESSFUL"之后,你可以在build/libs目录下找到JAR文件.
现在,使用以下命令运行JAR文件 :
java - jar
现在,应用程序已在Tomcat端口8080上启动.
现在点击POSTMAN应用程序中的以下URL,你可以看到输出.
GET休闲产品模板 : http://localhost:8080/template/products
创建产品POST : http://localhost:8080/template/products
更新产品PUT : http://localhost:8080/template/products/3
删除产品 : 去; http://localhost:8080/template/products/3