Springboot RestTemplate 简单使用解析

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
*/
@Component
public 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("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;
}
@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;
}