post请求方法和get请求方法package com.xkeshi.paymentweb.controllers.test;import com.alibaba.fastjson.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;/*** Created by jiangzw on 2017/11/3.*/
public class MyTestHttpClient {/*** post方式提交表单（模拟用户登录请求）*/public static void doFormPost() {// 创建默认的httpClient实例.CloseableHttpClient httpclient = HttpClients.createDefault();// 创建httppostString url = "http://localhost:8888/myTest/testHttpClientPost";HttpPost httppost = new HttpPost(url);// 创建参数队列List<NameValuePair> formparams = new ArrayList<NameValuePair>();formparams.add(new BasicNameValuePair("username", "admin"));formparams.add(new BasicNameValuePair("password", "123456"));UrlEncodedFormEntity entity = null;try {entity = new UrlEncodedFormEntity(formparams, "UTF-8");httppost.setEntity(entity);System.out.println("executing request " + httppost.getURI());CloseableHttpResponse response = httpclient.execute(httppost);try {HttpEntity resEntity = response.getEntity();if (resEntity != null) {System.out.println("Response content: " + EntityUtils.toString(resEntity, "UTF-8"));}} finally {response.close();}} catch (Exception e) {e.printStackTrace();} finally {// 关闭连接,释放资源try {httpclient.close();} catch (IOException e) {e.printStackTrace();}}}/*** 发送 get请求*/public static void doGet() {CloseableHttpClient httpclient = HttpClients.createDefault();// 创建参数队列List<NameValuePair> params = new ArrayList<NameValuePair>();params.add(new BasicNameValuePair("username", "admin"));params.add(new BasicNameValuePair("password", "123456"));try {//参数转换为字符串String paramsStr = EntityUtils.toString(new UrlEncodedFormEntity(params, "UTF-8"));String url = "http://localhost:8888/myTest/testHttpClientGet" + "?" + paramsStr;// 创建httpget.HttpGet httpget = new HttpGet(url);System.out.println("executing request " + httpget.getURI());// 执行get请求.CloseableHttpResponse response = httpclient.execute(httpget);try {// 获取响应实体HttpEntity entity = response.getEntity();// 打印响应状态
                System.out.println(response.getStatusLine());if (entity != null) {// 打印响应内容长度System.out.println("Response content length: " + entity.getContentLength());// 打印响应内容System.out.println("Response content: " + EntityUtils.toString(entity));}} finally {response.close();}} catch (Exception e) {e.printStackTrace();} finally {// 关闭连接,释放资源try {httpclient.close();} catch (IOException e) {e.printStackTrace();}}}/*** post方式提交表单（模拟用户登录请求）*/public static void doStringPost() {// 创建默认的httpClient实例.CloseableHttpClient httpclient = HttpClients.createDefault();// 创建httppostString url = "http://localhost:8888/myTest/testHttpClientStringPost";HttpPost httppost = new HttpPost(url);// 创建参数字符串JSONObject jsonObject = new JSONObject();jsonObject.put("username", "admin");jsonObject.put("password", "123456");try {//设置实体内容的格式。APPLICATION_JSON = "application/json"，// 如果传送"application/xml"格式，选择ContentType.APPLICATION_XMLStringEntity entity = new StringEntity(jsonObject.toString(), ContentType.APPLICATION_JSON);httppost.setEntity(entity); //发送字符串参数System.out.println("executing request " + httppost.getURI());CloseableHttpResponse response = httpclient.execute(httppost);try {HttpEntity resEntity = response.getEntity();if (resEntity != null) {System.out.println("Response content: " + EntityUtils.toString(resEntity, "UTF-8"));}} finally {response.close();}} catch (Exception e) {e.printStackTrace();} finally {// 关闭连接,释放资源try {httpclient.close();} catch (IOException e) {e.printStackTrace();}}}/*** 上传文件*/public static void doUploadPost() {CloseableHttpClient httpclient = HttpClients.createDefault();String url = "http://localhost:8888/myTest/testHttpClientUploadPost";try {HttpPost httppost = new HttpPost(url);FileBody fileBody = new FileBody(new File("D:\\img8.jpg"));StringBody stringBody = new StringBody("一张测试图片", ContentType.TEXT_PLAIN.withCharset("UTF-8"));MultipartEntityBuilder builder = MultipartEntityBuilder.create();builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);builder.addPart("file", fileBody);//文件参数builder.addPart("explain", stringBody);//字符串参数HttpEntity entity = builder.build();httppost.setEntity(entity);System.out.println("executing request " + httppost.getRequestLine());CloseableHttpResponse response = httpclient.execute(httppost);try {System.out.println(response.getStatusLine());HttpEntity resEntity = response.getEntity();if (resEntity != null) {System.out.println("Response content: " + EntityUtils.toString(resEntity, "UTF-8"));}} finally {response.close();}} catch (Exception e) {e.printStackTrace();} finally {try {httpclient.close();} catch (IOException e) {e.printStackTrace();}}}public static void main(String[] args) {
//        doFormPost();
//        doGet();
//        doStringPost();
        doUploadPost();}}处理请求的方法package com.xkeshi.paymentweb.controllers.test;import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.commons.CommonsMultipartFile;import java.io.File;/*** Created by jiangzw on 2017/11/3.*/
@Controller
@RequestMapping(value = "/myTest")
public class MyTestController {@ResponseBody@RequestMapping(value = "/testHttpClientPost", method = RequestMethod.POST)public String testHttpClientPost(@RequestParam("username") String username,@RequestParam("password") String password) {String result = null;if ("admin".equals(username) && "123456".equals(password)) {result = "用户名和密码验证成功！";} else {result = "用户名和密码验证失败！";}return result;}@ResponseBody@RequestMapping(value = "/testHttpClientGet", method = RequestMethod.GET)public String testHttpClientGet(@RequestParam("username") String username,@RequestParam("password") String password) {String result = null;if ("admin".equals(username) && "123456".equals(password)) {result = "用户名和密码验证成功！";} else {result = "用户名和密码验证失败！";}return result;}@ResponseBody@RequestMapping(value = "/testHttpClientStringPost", method = RequestMethod.POST)public String testHttpClientStringPost(@RequestBody String requestBody) {JSONObject jsonObject = JSON.parseObject(requestBody);String username = jsonObject.get("username").toString();String password = jsonObject.get("password").toString();String result = null;if ("admin".equals(username) && "123456".equals(password)) {result = "用户名和密码验证成功！";} else {result = "用户名和密码验证失败！";}return result;}@ResponseBody@RequestMapping(value = "/testHttpClientUploadPost", method = RequestMethod.POST)public String testHttpClientUploadPost(@RequestParam("file") CommonsMultipartFile file,@RequestParam("explain") String explain) {System.out.println("explain: " + explain);String result = "上传失败";//文件保存路径和名称String savePath = "D:\\home" + File.separator + System.currentTimeMillis() + file.getOriginalFilename();File newFile= null;try {newFile = new File(savePath);//通过CommonsMultipartFile的方法直接写文件（注意这个时候）
            file.transferTo(newFile);result = "上传成功";} catch (Exception e) {e.printStackTrace();}return result;}
}