JAVA调用API实践与总结-优快云博客

本文链接：https://blog.youkuaiyun.com/admintys/article/details/124707077

这篇博客主要分享了JAVA调用API的经验，包括如何创建调用api的工具类，给出了具体的API实例，并且总结了返回值处理方式，建议根据业务需求选择使用JSON或MAP进行数据解析。

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调用api工具类

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
import com.emapgo.job.executor.bean.api.RoutingMatch;
import lombok.extern.slf4j.Slf4j;
import net.sf.json.JSONObject;

@Slf4j
public class ApiUtils {


	public static JSONObject MatchAPI(String data) {
		
		RoutingMatch match =new RoutingMatch();
    	//接口地址URL
		StringBuffer buff=	 new StringBuffer();
    	buff.append(match.getURL());
    	buff.append("/"+match.getVersion());
    	buff.append("/routing/match/");
    	buff.append(data+"?");
    	//参数
    	HashMap map= new HashMap();
    	map.put("traveltype", match.getTraveltype());
    	map.put("steps", match.getSteps());
    	map.put("annotations", match.getAnnotations());
    	map.put("geometries", match.getGeometries());
    	map.put("token", match.getToken());
    	try {
    		 String string = httpRequest(buff.toString(),map);
    	        JSONObject result = JSONObject.fromObject(string);
    			return result;
		} catch (Exception e) {
			// TODO: handle exception
			log.info("服务器链接异常："+e.toString());
		}
		return null;
    }
    
    private static String httpRequest(String requestUrl,HashMap map) {  
    	//buffer用于接受返回的字符
    	StringBuffer buffer = new StringBuffer();
        try {  
            URL url = new URL(requestUrl+urlencode(map));  
          //  System.out.println(url);
            //打开http连接
            HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();  
            httpUrlConn.setDoInput(true);  
            httpUrlConn.setRequestMethod("GET");  
            httpUrlConn.connect();  
            //获得输入
            InputStream inputStream = httpUrlConn.getInputStream();  
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");  
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);  
            //将bufferReader的值给放到buffer里
            String str = null;  
            while ((str = bufferedReader.readLine()) != null) {  
                buffer.append(str);  
            }  
            //关闭bufferReader和输入流
            bufferedReader.close();  
            inputStreamReader.close();  
            inputStream.close();  
            inputStream = null;  
            //断开连接
            httpUrlConn.disconnect();
            
            return buffer.toString();  
        } catch (Exception e) {  
            log.info("服务器链接异常："+e.toString());
        }  
    //    System.out.println(buffer.toString());
        	//返回字符串
        return null;  
    }  
    
    /**
     * @Title: urlencode   
     * @Description: TODO(URL拼接与转码)   
     * @param: @param data
     * @param: @return      
     * @return: String      
     * @throws
     */
    public static String urlencode(Map<String,Object>data) {
        StringBuilder sub = new StringBuilder();
        for (Map.Entry i : data.entrySet()) {
            try {
            	sub.append(i.getKey()).append("=").append(URLEncoder.encode(i.getValue()+"","UTF-8")).append("&");
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
        }
        return sub.toString();
    }
   

}

api实例

我把API的url分解成了实体类(我这比较特殊参数不是固定的)。固定IP的URL,参数少的,或者没有参数的直接用URL就行了


import lombok.Getter;
import lombok.Setter;
import lombok.ToString;

@Setter
@Getter
@ToString
public class RoutingMatch {

     //http://IP:端口
	private String URL="http://***.***.***.***:****"; 

	private String version="v1"; 
	
	private String token="eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9";
	
	private String coordinates; 
	
	private String format;

	private String traveltype= "car";
	
	private String steps="false";
	
	private String geometries="geojson";
	
	private String annotations="true";

	private String overview="false";
	
	private Long timestamps;
	
	private Double radiuses;
	
	private Long gaps;
	
	private Long tidy;
	
	private Long waypoints;
	
}