SpringBoot RestTemplate 简单包装解析

package cn.eangaie.demo.util;import com.alibaba.fastjson.JSONObject;import org.springframework.http.*;import org.springframework.stereotype.Component;import org.springframework.util.MultiValueMap;import org.springframework.web.client.RestTemplate;import java.util.Map;/*** @author Eangaie* @date 2018/10/12 0012 下午 14:53* 网络请求,RestTemplate工具类*/@Componentpublic class RestTemplateUtil {	private RestTemplate restTemplate;	/*** 发送GET请求* @param url* @param param* @return*/	public String GetData(String url, Map<String,String> param){		restTemplate=new RestTemplate();		// 请勿轻易改变此提交方式，大部分的情况下，提交方式都是表单提交		HttpHeaders headers = new HttpHeaders();		headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);		return restTemplate.getForEntity(url,String.class,param).getBody();	}	/*** 发送POST-JSON请求* @param url* @param param* @return*/	public String PostJsonData(String url,JSONObject param){		restTemplate=new RestTemplate();		HttpHeaders headers = new HttpHeaders();		headers.setContentType(MediaType.APPLICATION_JSON_UTF8);		headers.add("Accept", MediaType.APPLICATION_JSON.toString());		HttpEntity<JSONObject> requestEntity = new HttpEntity<JSONObject>(param, headers);		return restTemplate.postForEntity(url,param,String.class).getBody();	}	/*** 发送POST 表单请求* @param url* @param param* @return*/	public String PostFormData(String url,MultiValueMap<String,String> param){		restTemplate=new RestTemplate();		// 请勿轻易改变此提交方式，大部分的情况下，提交方式都是表单提交		HttpHeaders headers = new HttpHeaders();		headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);		return restTemplate.postForEntity(url,param,String.class).getBody();	}}

@GetMapping("selectUser")public Result selectUser(int id){	user=userService.selectById(id);	return ResultUtil.success(user,"查询成功");}@GetMapping("testGetData")public String testGetData(){	String url="http://localhost:81/sample/GetData?msg={msg}&author={author}";	Map<String,String> param=new HashMap<>();	param.put("msg","Hello");	param.put("author","彦杰");	return restTemplateUtil.GetData(url,param);}@GetMapping("testPostJsonData")public String testPostJsonData(){	String url="http://localhost:81/sample/PostData";	JSONObject jsonObject=new JSONObject();	jsonObject.put("msg","hello");	jsonObject.put("author","彦杰");	return restTemplateUtil.PostJsonData(url,jsonObject);}@GetMapping("testPostFormData")public String testPostFormData(){	String url="http://localhost:81/sample/PostFormData";	MultiValueMap<String,String> param=new LinkedMultiValueMap<>();	param.add("msg","Hello");	param.add("author","彦杰");	return restTemplateUtil.PostFormData(url,param);}@GetMapping("GetData")public String getData(String msg, String author){	return msg+" "+author;}@PostMapping("PostData")public String postData(@RequestBody JSONObject jsonObject){	String msg=jsonObject.getString("msg");	String author=jsonObject.getString("author");	return msg+" "+author;}@PostMapping("PostFormData")public String PostFormData(String msg,String author){	return msg+" "+author;}