aaa

package com.test;

import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Map;

public class doPostFile2 {
    public static String doPostFile(String url, Map<String, String> param, File file) {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        // 处理https链接
        if (url.startsWith("https://")) {
            httpClient = sslClient();
        }
        String resultString = "";
        CloseableHttpResponse response = null;
        HttpPost httppost = new HttpPost(url);
        try {
            // HttpMultipartMode.RFC6532参数的设定是为避免文件名为中文时乱码
            MultipartEntityBuilder builder = MultipartEntityBuilder.create().setMode(HttpMultipartMode.RFC6532);
            // 设置请求的编码格式
            builder.setCharset(Consts.UTF_8);
            builder.setContentType(ContentType.MULTIPART_FORM_DATA);
            // 添加文件,也可以添加字节流
//       builder.addBinaryBody("file", file);
            //或者使用字节流也行,根据具体需要使用
            builder.addBinaryBody("file", Files.readAllBytes(file.toPath()), ContentType.APPLICATION_OCTET_STREAM, file.getName());
            // 或者builder.addPart("file",new FileBody(file));
            // 添加参数
            if (param != null) {
                for (String key : param.keySet()) {
                    builder.addTextBody(key, param.get(key));
                }
            }
            //httppost.addHeader("token", param.get("token"));
            HttpEntity reqEntity = builder.build();
            httppost.setEntity(reqEntity);
            // 设置超时时间
            httppost.setConfig(getConfig());
            response = httpClient.execute(httppost);
            resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                response.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return resultString;
    }

    private static RequestConfig getConfig() {
        return RequestConfig.custom().setConnectionRequestTimeout(60000).setSocketTimeout(120000)
                .setConnectTimeout(60000).build();
    }

    /**
     * 设置SSL请求处理
     */
    private static CloseableHttpClient sslClient() {
        try {
            SSLContext ctx = SSLContext.getInstance("TLS");
            X509TrustManager tm = new X509TrustManager() {
                @Override
                public void checkClientTrusted(java.security.cert.X509Certificate[] arg0, String arg1)
                        throws CertificateException {
                    // TODO Auto-generated method stub

                }

                @Override
                public void checkServerTrusted(java.security.cert.X509Certificate[] arg0, String arg1)
                        throws CertificateException {
                    // TODO Auto-generated method stub
                }

                @Override
                public X509Certificate[] getAcceptedIssuers() {
                    // TODO Auto-generated method stub
                    return null;
                }

            };
            ctx.init(null, new TrustManager[]{tm}, null);
            SSLConnectionSocketFactory sslConnectionSocketFactory = SSLConnectionSocketFactory.getSocketFactory();
            return HttpClients.custom().setSSLSocketFactory(sslConnectionSocketFactory).build();
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        } catch (KeyManagementException e) {
            throw new RuntimeException(e);
        }
    }
}

<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
<version>4.5</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5</version>
</dependency>

 

 

在HttpClient4.3之后的用法
在HttpClient4.3之后，原来的上传文件方法MultipartEntity已经不建议使用，现替换成新的httpmime下面的MultipartEntityBuilder。
上传方式:HttpClient+MultipartEntityBuilder

添加文件有3种方式:其中addBinaryBody这种方式比较灵活

builder.addBinaryBody("file", file);
builder.addBinaryBody("file", Files.readAllBytes(file.toPath()),ContentType.APPLICATION_OCTET_STREAM,file.getName());
//或者使用addPart
builder.addPart("file",new FileBody(file));