刚玩的一个Springboot查询城市天气的小项目
创建springboot应用
<?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> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.2.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.bolingcavalry</groupId> <artifactId>weatherservice</artifactId> <version>1.0-SNAPSHOT</version> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.3</version> </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>
然后是启动类:
package com.weatherservice; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class WeatherserviceApplication { public static void main(String[] args) { SpringApplication.run(WeatherserviceApplication.class,args); } }
配置类:
这里注意使用的是RestTemplate构造方法的入参,这样才能支持gzip压缩的response,否则得到的就是乱码:
package com.weatherservice; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.client.HttpComponentsClientHttpRequestFactory; import org.springframework.http.converter.StringHttpMessageConverter; import org.springframework.web.client.RestTemplate; import java.nio.charset.StandardCharsets; @Configuration public class WeatherConfig { @Bean public RestTemplate restTemplate(){ RestTemplate restTemplate = new RestTemplate(new HttpComponentsClientHttpRequestFactory()); restTemplate.getMessageConverters().set(1,new StringHttpMessageConverter(StandardCharsets.UTF_8)); return restTemplate; } }
然后就是最简单的controller啦:
package com.weatherservice.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.http.ResponseEntity; import org.springframework.web.bind.annotation.PathVariable; 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; @RestController public class QueryWeather { @Autowired RestTemplate restTemplate; @RequestMapping(value = "/get/{city}",method = RequestMethod.GET) public String extern(@PathVariable("city")String city){ String apiUrl = "http://wthrcdn.etouch.cn/weather_mini?city=" + city; ResponseEntity<String> forEntity = restTemplate.getForEntity(apiUrl, String.class); if (200== forEntity.getStatusCodeValue()){ return forEntity.getBody(); }else { return "error with code : " + forEntity.getStatusCodeValue(); } } }
效果如图。完毕