模拟get和post请求

尊重劳动者的成果，本文参考链接：https://www.cnblogs.com/amunote/p/4126548.html
尊重劳动者的成果，本文参考链接：https://www.cnblogs.com/amunote/p/4126548.html
尊重劳动者的成果，本文参考链接：https://www.cnblogs.com/amunote/p/4126548.html

我修改了一些参数获取的方式

package test.httputil;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
import java.util.Map;

/**
 * 文件名：HttpUtil
 * 作 者：Miles zhu
 * 时 间：2019/6/27 13:41
 * -------------------------
 * 功能和描述：手动实现一个能模拟get和post请求的工具类
 **/
public class HttpUtil {
    /**
     * 模拟get请求
     *
     * @param urlStr
     * @param mapParam
     * @return
     */
    public static String get(String urlStr, Map<String, Object> mapParam) {
        //先对参数进行处理
        urlStr = urlStr + "?" + getParamString(mapParam);
        System.out.println(urlStr);
        //定义连接
        HttpURLConnection conn = null;
        //定义答应输出流
        PrintWriter writer = null;
        try {
            //创建URL对象
            URL url = new URL(urlStr);

            //获取URL的连接
            conn = (HttpURLConnection) url.openConnection();

            //设置请求属性
            setHttpUrlConnection(conn, "GET");

            //建立连接
            conn.connect();

            //获取响应的内容
            return readResponseContent(conn.getInputStream());
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (null != conn) conn.disconnect();
        }
        return null;
    }

    private static String readResponseContent(InputStream in) throws IOException {
        Reader reader = null;
        StringBuilder content = new StringBuilder();
        try {
            reader = new InputStreamReader(in);
            char[] buffer = new char[1024];
            int head = 0;
            while ((head = reader.read(buffer)) > 0) {
                content.append(new String(buffer, 0, head));
            }
            return content.toString();
        } finally {
            if (null != in) in.close();
            if (null != reader) reader.close();
        }
    }

    /**
     * 设置http连接属性
     *
     * @param conn
     * @param requestMethod
     * @throws ProtocolException
     */
    private static void setHttpUrlConnection(HttpURLConnection conn, String requestMethod) throws ProtocolException {

        //设置请求方式
        conn.setRequestMethod(requestMethod);

        // 1.Accept: image/gif, image/x-xbitmap, image/jpeg,image/pjpeg, application/vnd.ms -powerpoint, application/vnd.ms- excel, application/msword, application/x- shockwave-flash, */*
        // 2.Accept-Language: zh-cn
        // 3.Accept-Encoding: gzip, deflate
        // 4.User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; MyIE2; .NET CLR 1.1.4322)
        // 5.Host: hyg
        // 6.Connection: Keep-Alive
        conn.setRequestProperty("accept", "*/*");
        conn.setRequestProperty("Accept-Language", "zh-CN");
        conn.setRequestProperty("User-Agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)");
        conn.setRequestProperty("Proxy-Connection", "Keep-Alive");

        if (null != requestMethod && "POST".equals(requestMethod)) {
            conn.setDoOutput(true);
            conn.setDoInput(true);
        }
    }


    public static String post(String urlStr, Map<String, Object> paramMap) throws Exception {
        HttpURLConnection conn = null;
        PrintWriter writer = null;
        try {
            //创建URL对象
            URL url = new URL(urlStr);
            //获取请求参数
            String param = getParamString(paramMap);
            //获取URL连接
            conn = (HttpURLConnection) url.openConnection();
            //设置通用请求属性
            setHttpUrlConnection(conn, "POST");
            //建立实际的连接
            conn.connect();
            //将请求参数写入请求字符流中
            writer = new PrintWriter(conn.getOutputStream());
            writer.print(param);
            writer.flush();
            //读取响应的内容
            return readResponseContent(conn.getInputStream());
        } finally {
            if (null != conn) conn.disconnect();
            if (null != writer) writer.close();
        }
    }

    /**
     * 处理参数，进行拼接
     *
     * @param paramMap
     * @return
     */
    private static String getParamString(Map<String, Object> paramMap) {
        if (null == paramMap || paramMap.isEmpty()) {
            return "";
        }
        StringBuilder builder = new StringBuilder();
        for (String key : paramMap.keySet()) {
            builder.append("&")
                    .append(key).append("=").append(paramMap.get(key));
        }
        return builder.deleteCharAt(0).toString();
    }
}

测试类
package test.httputil;

import com.alibaba.fastjson.JSON;
import test.httputil.utils.ICBCBase64Utils;

import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Map;

package test.httputil;

import com.alibaba.fastjson.JSON;

import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Map;

/**
 * 文件名：HttpUtilDemo
 * 作 者：Miles zhu
 * 时 间：2019/6/27 14:00
 * -------------------------
 * 功能和描述：
 **/
public class HttpUtilDemo {

    public static void main(String[] args) throws UnsupportedEncodingException {
        Map<String, Object> map = new HashMap<>();
        String str = "工资";
        byte[] gbks = str.getBytes("GBK");
        String gbk = new String(gbks, "GBK");
        System.out.println(gbk);
        map.put("username", gbk);
        map.put("age", 12);

        Map<String, Object> data = new HashMap<>();

        //String gbk1 = ICBCBase64Utils.getrevFromBASE64(gbk.getBytes("GBK"));
       // map.put("username", gbk1);
//        System.out.println("gbk1: "+gbk1);
        data.put("data", JSON.toJSONString(map));
        try {
            HttpUtil.post("http://127.0.0.1:5555/test", map);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

请求接收端：
package com.gaia.springboot.controller;

import com.gaia.springboot.utils.ICBCBase64Utils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.io.UnsupportedEncodingException;

package com.gaia.springboot.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import java.util.Map;

/**
 * 文件名：UserController
 * 作 者：Miles zhu
 * 时 间：2019/6/27 13:58
 * -------------------------
 * 功能和描述：
 **/
@RestController
public class UserController {

    @RequestMapping("/user")
    public void getUser(@RequestParam("data") String data){
        System.out.println(data);

        Map<String, String> dataMap = JSON.parseObject(data, new TypeReference<Map<String, String>>()
        {
        });

        String age = dataMap.get("age");
        System.out.println(age);
        String username = dataMap.get("username");
        System.out.println(username);
        System.out.println("user.....");
    }


    @RequestMapping("/user1")
    public String getUser(){
        System.out.println("user.....");
        return "user1111";
    }
}

尊重劳动者的成果，本文参考链接：https://www.cnblogs.com/amunote/p/4126548.html
尊重劳动者的成果，本文参考链接：https://www.cnblogs.com/amunote/p/4126548.html
尊重劳动者的成果，本文参考链接：https://www.cnblogs.com/amunote/p/4126548.html
 
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原文地址：https://www.cnblogs.com/zyzblogs/p/11101631.html