使用spring的RestTemplate

场景:使用spring的RestTemplate,进行内部服务间调用,解耦服务
1.创建spring的web项目,保证服务在tomcat中正常运行。
2.本例调用rest服务传递一个实体对象,转为json字符串后传递

public class CityInfoModel implements Serializable {

	private static final long serialVersionUID = 4443714978780088961L;
	
	/** 城市名称 */
	String cityName;
	/**城市面积*/ 
	double landArea;
	/**人口*/
	long population;
	/**生产总值*/
	double gross ;
	/** 行政区划代码 */
	String areaNumber;
	/** 邮政编码 */
	String postalCode;
	/** 电话区号 */
	String telephoneCode;
	/**车牌代码*/
	String carCode;
	/** 城市描述 */
	String cityDescribe;
	
	public String getCityName() {
		return cityName;
	}
	public void setCityName(String cityName) {
		this.cityName = cityName;
	}
	public double getLandArea() {
		return landArea;
	}
	public void setLandArea(double landArea) {
		this.landArea = landArea;
	}
	public long getPopulation() {
		return population;
	}
	public void setPopulation(long population) {
		this.population = population;
	}
	public double getGross() {
		return gross;
	}
	public void setGross(double gross) {
		this.gross = gross;
	}
	public String getAreaNumber() {
		return areaNumber;
	}
	public void setAreaNumber(String areaNumber) {
		this.areaNumber = areaNumber;
	}
	public String getPostalCode() {
		return postalCode;
	}
	public void setPostalCode(String postalCode) {
		this.postalCode = postalCode;
	}
	public String getTelephoneCode() {
		return telephoneCode;
	}
	public void setTelephoneCode(String telephoneCode) {
		this.telephoneCode = telephoneCode;
	}
	public String getCarCode() {
		return carCode;
	}
	public void setCarCode(String carCode) {
		this.carCode = carCode;
	}
	public String getCityDescribe() {
		return cityDescribe;
	}
	public void setCityDescribe(String cityDescribe) {
		this.cityDescribe = cityDescribe;
	}
	@Override
	public String toString() {
		
		return "CityModel [cityName=" + cityName
				+",landArea=" + landArea
				+",population=" + population
				+",gross=" + gross
				+",areaNumber=" + areaNumber
				+",postalCode=" + postalCode
				+",telephoneCode=" + telephoneCode
				+",carCode=" + carCode
				+",cityDescribe=" + cityDescribe
				+"]";
	}
}

3.使用RestTemplate封装

public class OperateRestTemplateUtils {
	
	private static Logger logger = LoggerFactory.getLogger(OperateRestTemplateUtils.class);
	private static RestTemplate restTemplate = new RestTemplate();
	public static <T> T postForObject(String url, Object paramMap,Class<T> responseType) throws Exception {

		HttpHeaders httpHeaders = new HttpHeaders();
		MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");
		httpHeaders.setContentType(type);
		httpHeaders.add("Accept", MediaType.APPLICATION_JSON.toString());
		String jsonStr = JSON.toJSONString(paramMap);
                System.out.println("发送请求参数为:" + jsonStr.toString());
		HttpEntity<String> formEntity = new HttpEntity<String>(jsonStr.toString(), httpHeaders);
		return restTemplate.postForObject(url, formEntity, responseType);
	}
}

4.测试main方法,其中url中 study是项目名称

public class TestRestTemplate {
	private static final String url = "http://localhost:8080/study/service/city";
	public static void main(String[] args) throws Exception {

		CityInfoModel city = new CityInfoModel();
		city.setCityName("厦门");
		city.setCityDescribe("适合居住的城市.");
		System.out.println("测试开始......");
		String objJson = OperateRestTemplateUtils.postForObject(url, city,String.class);
		System.out.println(objJson);
		System.out.println("测试结束......");
	}
}

5.服务端controller示例

@Controller
@RequestMapping("/service")
public class CityController {
	
	private static final Logger logger = LoggerFactory.getLogger(CityController.class);
	
	@ResponseBody
	@RequestMapping(value = "city" ,method = RequestMethod.POST )
	public String cityInfo(@RequestBody CityInfoModel cityModel) {
		
		logger.info("进入CityController");
		logger.info(cityModel.toString());
		logger.info("退出CityController");
		return "城市信息";
	}
}

以上,TKS.