常用工具记录

常用工具记录

发送请求

http://httpbin.org/#/Status_codes

纯Java

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Map;

/**
 * @author KawYang
 * Created by MacBook Pro on 2022/03/27.
 */
public class RequestUtil {
    private static final String POST = "POST";
    private static final String GET = "GET";
    public static void appadd(String path, String method , String params) {
        try {
            //创建连接
            URL url = new URL(path);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setDoOutput(true);
            connection.setDoInput(true);
            connection.setRequestMethod(method);
            connection.setUseCaches(false);
            connection.setInstanceFollowRedirects(true);
            connection.setRequestProperty("Content-Type", "application/json");
            connection.connect();
            //POST请求
            if (POST.equals(method)) {
                DataOutputStream out = new DataOutputStream(
                        connection.getOutputStream());
                out.writeBytes(params);
                out.flush();
                out.close();
            }
            //读取响应
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String lines;
            StringBuffer sb = new StringBuffer("");
            while ((lines = reader.readLine()) != null) {
                lines = new String(lines.getBytes(), StandardCharsets.UTF_8);
                sb.append(lines);
            }
            System.out.println(sb);
            reader.close();
            // 断开连接
            connection.disconnect();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    public static void main(String[] args) {

        final HashMap<String, Object> params = new HashMap<>(3);
        appadd("url", POST, mapToJSON(params));
        appadd(mapToGetUrl("url", params), GET, null);
    }
    /**
     * 填充GET请求地址
     * @param url baseUrl
     * @param map params
     * @return url
     */
    private static String mapToGetUrl(String url , Map<String, Object> map){
        final StringBuilder builder = new StringBuilder(url);
        builder.append("?");
        map.forEach((key, value) -> {
            builder.append(String.format("%s=%s&", key, value));
        });
        return builder.toString();
    }

    /**
     * map转json
     * @param map Map
     * @return json String
     */
    private static String mapToJSON(Map<String, Object> map){
        final StringBuilder builder = new StringBuilder("{");
        map.forEach((key, value) -> {
            builder.append(String.format("\"%s\":\"%s\",", key, value));
        });
        builder.append("}");
        return builder.toString().replace(",}", "}");
    }
}

Hutool

<dependency>
	<groupId>cn.hutoolgroupId>
	<artifactId>hutool-allartifactId>
	<version>5.5.8version>
dependency>

import cn.hutool.http.HttpRequest;
import cn.hutool.http.HttpResponse;
import cn.hutool.http.HttpUtil;
import com.alibaba.fastjson.JSONObject;
import java.util.HashMap;
import java.util.Map;
/**
 * @author KawYang
 * Created by MacBook Pro on 2022/03/27.
 */
public class HutoolRequestUtil {
    public static void main(String[] args) {
        final HashMap<String, Object> params = new HashMap<>();
        params.put("key", "value");
        doGet("url", params);
        doPost("url", params);
    }

    /**
     * Get
     * @param url url
     * @param params params
     * @return response
     */
    public static String doGet(String url, Map<String, Object> params){
        final String response = HttpUtil.get(url, params);
        System.out.println(response);
        return response;
    }
    /**
     * Post
     * @param url url
     * @param params params
     * @return response
     */
    public static String doPost(String url, Map<String, Object> params){
        final HttpRequest request = HttpUtil.createPost(url).body(JSONObject.toJSONString(params));
        request.header("Content-Type","application/json");
        request.setConnectionTimeout(2000);
        final HttpResponse execute = request.execute();
        System.out.println(execute.body());
        return execute.body();
    }
}

• 生成注释

 public static void main(String[] args) {
       final Field[] declaredFields = ClassEs.class.getDeclaredFields();
       for (Field field : declaredFields) {
           field.setAccessible(true);
           final ApiModelProperty annotation = field.getAnnotation(ApiModelProperty.class);
           try {
               System.out.println(String.format("@ApiModelProperty(\"%s\")", annotation.value()));
           }catch (Exception e){}
           System.out.println(String.format("@TableField(value = \"%s\")", StrUtil.toUnderlineCase( field.getName()).toUpperCase()));
           System.out.println(String.format("private %s %s;", field.getType().getName().substring(field.getType().getName().lastIndexOf(".") + 1), field.getName()));
           System.out.println();
       }
   }