java模拟表单上传文件,java通过模拟post方式提交表单实现图片上传功能实例

java模拟表单上传文件,java通过模拟post方式提交表单实现图片上传功能实例
HttpClient 测试类,提供get post方法实例

  1 package com.zdz.httpclient;
  2 
  3 import java.io.BufferedReader;
  4 import java.io.DataInputStream;
  5 import java.io.DataOutputStream;
  6 import java.io.File;
  7 import java.io.FileInputStream;
  8 import java.io.InputStreamReader;
  9 import java.io.OutputStream;
 10 import java.net.HttpURLConnection;
 11 import java.net.URL;
 12 import java.util.HashMap;
 13 import java.util.Iterator;
 14 import java.util.Map;
 15 import javax.activation.MimetypesFileTypeMap;
 16 
 17 /**
 18  * java通过模拟post方式提交表单实现图片上传功能实例
 19  * 其他文件类型可以传入 contentType 实现
 20  * @author zdz8207
 21  * {@link http://www.cnblogs.com/zdz8207/}
 22  * @version 1.0
 23  */
 24 public class HttpUploadFile {
 25 
 26     public static void main(String[] args) {
 27         testUploadImage();
 28     }
 29     
 30     /**
 31      * 测试上传png图片
 32      * 
 33      */
 34     public static void testUploadImage(){
 35         String url = "http://xxx/wnwapi/index.php/Api/Index/testUploadModelBaking";
 36         String fileName = "e:/chenjichao/textures/antimap_0017.png";
 37         Map<String, String> textMap = new HashMap<String, String>();
 38         //可以设置多个input的name,value
 39         textMap.put("name", "testname");
 40         textMap.put("type", "2");
 41         //设置file的name,路径
 42         Map<String, String> fileMap = new HashMap<String, String>();
 43         fileMap.put("upfile", fileName);
 44         String contentType = "";//image/png
 45         String ret = formUpload(url, textMap, fileMap,contentType);
 46         System.out.println(ret);
 47         //{"status":"0","message":"add succeed","baking_url":"group1\/M00\/00\/A8\/CgACJ1Zo-LuAN207AAQA3nlGY5k151.png"}
 48     }
 49 
 50     /**
 51      * 上传图片
 52      * @param urlStr
 53      * @param textMap
 54      * @param fileMap
 55      * @param contentType 没有传入文件类型默认采用application/octet-stream
 56      * contentType非空采用filename匹配默认的图片类型
 57      * @return 返回response数据
 58      */
 59     @SuppressWarnings("rawtypes")
 60     public static String formUpload(String urlStr, Map<String, String> textMap,
 61             Map<String, String> fileMap,String contentType) {
 62         String res = "";
 63         HttpURLConnection conn = null;
 64         // boundary就是request头和上传文件内容的分隔符
 65         String BOUNDARY = "---------------------------123821742118716"; 
 66         try {
 67             URL url = new URL(urlStr);
 68             conn = (HttpURLConnection) url.openConnection();
 69             conn.setConnectTimeout(5000);
 70             conn.setReadTimeout(30000);
 71             conn.setDoOutput(true);
 72             conn.setDoInput(true);
 73             conn.setUseCaches(false);
 74             conn.setRequestMethod("POST");
 75             conn.setRequestProperty("Connection", "Keep-Alive");
 76             conn.setRequestProperty("User-Agent",
 77                     "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)");
 78             conn.setRequestProperty("Content-Type",
 79                     "multipart/form-data; boundary=" + BOUNDARY);
 80             OutputStream out = new DataOutputStream(conn.getOutputStream());
 81             // text
 82             if (textMap != null) {
 83                 StringBuffer strBuf = new StringBuffer();
 84                 Iterator iter = textMap.entrySet().iterator();
 85                 while (iter.hasNext()) {
 86                     Map.Entry entry = (Map.Entry) iter.next();
 87                     String inputName = (String) entry.getKey();
 88                     String inputValue = (String) entry.getValue();
 89                     if (inputValue == null) {
 90                         continue;
 91                     }
 92                     strBuf.append("\r\n").append("--").append(BOUNDARY)
 93                             .append("\r\n");
 94                     strBuf.append("Content-Disposition: form-data; name=\""
 95                             + inputName + "\"\r\n\r\n");
 96                     strBuf.append(inputValue);
 97                 }
 98                 out.write(strBuf.toString().getBytes());
 99             }
100             // file
101             if (fileMap != null) {
102                 Iterator iter = fileMap.entrySet().iterator();
103                 while (iter.hasNext()) {
104                     Map.Entry entry = (Map.Entry) iter.next();
105                     String inputName = (String) entry.getKey();
106                     String inputValue = (String) entry.getValue();
107                     if (inputValue == null) {
108                         continue;
109                     }
110                     File file = new File(inputValue);
111                     String filename = file.getName();
112                     
113                     //没有传入文件类型,同时根据文件获取不到类型,默认采用application/octet-stream
114                     contentType = new MimetypesFileTypeMap().getContentType(file);
115                     //contentType非空采用filename匹配默认的图片类型
116                     if(!"".equals(contentType)){
117                         if (filename.endsWith(".png")) {
118                             contentType = "image/png"; 
119                         }else if (filename.endsWith(".jpg") || filename.endsWith(".jpeg") || filename.endsWith(".jpe")) {
120                             contentType = "image/jpeg";
121                         }else if (filename.endsWith(".gif")) {
122                             contentType = "image/gif";
123                         }else if (filename.endsWith(".ico")) {
124                             contentType = "image/image/x-icon";
125                         }
126                     }
127                     if (contentType == null || "".equals(contentType)) {
128                         contentType = "application/octet-stream";
129                     }
130                     StringBuffer strBuf = new StringBuffer();
131                     strBuf.append("\r\n").append("--").append(BOUNDARY)
132                             .append("\r\n");
133                     strBuf.append("Content-Disposition: form-data; name=\""
134                             + inputName + "\"; filename=\"" + filename
135                             + "\"\r\n");
136                     strBuf.append("Content-Type:" + contentType + "\r\n\r\n");
137                     out.write(strBuf.toString().getBytes());
138                     DataInputStream in = new DataInputStream(
139                             new FileInputStream(file));
140                     int bytes = 0;
141                     byte[] bufferOut = new byte[1024];
142                     while ((bytes = in.read(bufferOut)) != -1) {
143                         out.write(bufferOut, 0, bytes);
144                     }
145                     in.close();
146                 }
147             }
148             byte[] endData = ("\r\n--" + BOUNDARY + "--\r\n").getBytes();
149             out.write(endData);
150             out.flush();
151             out.close();
152             // 读取返回数据
153             StringBuffer strBuf = new StringBuffer();
154             BufferedReader reader = new BufferedReader(new InputStreamReader(
155                     conn.getInputStream()));
156             String line = null;
157             while ((line = reader.readLine()) != null) {
158                 strBuf.append(line).append("\n");
159             }
160             res = strBuf.toString();
161             reader.close();
162             reader = null;
163         } catch (Exception e) {
164             System.out.println("发送POST请求出错。" + urlStr);
165             e.printStackTrace();
166         } finally {
167             if (conn != null) {
168                 conn.disconnect();
169                 conn = null;
170             }
171         }
172         return res;
173     }
174 }

 

HttpClientTest.java

package com.zdz.httpclient;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;

/**
 * HttpClient 测试类,提供get post方法实例
 * @author zdz8207
 *
 */
public class HttpClientTest {
    private static final String URL = "http://www.163.com";
    private static final int PORT = 80;

    public static void main(String[] args) throws Exception {
        //测试get方法
        doGetMethod(URL,PORT);
        //测试post方法
        String posturl = "http://mail.163.com/";
        doPostMethod(posturl,PORT);
    }

    /**
     * http get 方法
     * @param url
     * @param port
     * @throws HttpException
     * @throws IOException
     * @return bodystring
     */
    public static String doGetMethod(String url,int port) throws HttpException, IOException {
        HttpClient client = new HttpClient();
        // 设置代理服务器地址和端口
        client.getHostConfiguration().setHost(url, port);
        // 使用 GET 方法
        GetMethod method = new GetMethod(url);
        //执行请求
        client.executeMethod(method);

        // 打印服务器返回的状态
        System.out.println(method.getStatusLine());
        // 打印返回的信息
//        System.out.println(method.getResponseBodyAsString());
        // response body of large or unknown size. Using getResponseBodyAsStream instead is recommended. 
        InputStream bodystreams = method.getResponseBodyAsStream();
        String body = convertStreamToString(bodystreams);
        System.out.println(body);
        // 释放连接
        method.releaseConnection();
        
        return body;
    }
    
    /**
     * http post 方法
     * @param url
     * @param port
     * @throws HttpException
     * @throws IOException
     * @return bodystring
     */
    public static String doPostMethod(String url,int port) throws HttpException, IOException {
        HttpClient client = new HttpClient();
        // 设置代理服务器地址和端口
        client.getHostConfiguration().setHost(url, port);
        // 使用POST方法
        PostMethod method = new PostMethod(url);
        //设置传递参数
        NameValuePair agent = new NameValuePair("User-Agent","Mozilla/4.0 (compatible; MSIE 8.0; Windows 2000)");
        NameValuePair username = new NameValuePair("email", "xxx@163.com");
        NameValuePair password = new NameValuePair("password", "xxxxxx");
        method.setRequestBody(new NameValuePair[] { agent, username, password });
        //执行请求
        client.executeMethod(method);
//        设置cookies
//        Cookie[] cookies = client.getState().getCookies();
//        client.getState().addCookies(cookies);
        
        // 打印服务器返回的状态
        System.out.println(method.getStatusLine());
        // 打印返回的信息
//        System.out.println(method.getResponseBodyAsString());
        // response body of large or unknown size. Using getResponseBodyAsStream instead is recommended. 
        InputStream bodystreams = method.getResponseBodyAsStream();
        String body = convertStreamToString(bodystreams);
        System.out.println(body);
        // 释放连接
        method.releaseConnection();
        
        return body;
    }
    
    /**
     * 把InputStream 转换成String返回
     * @param is InputStream
     * @return String
     * @throws UnsupportedEncodingException
     */
    public static String convertStreamToString(InputStream is) throws UnsupportedEncodingException {    
//        BufferedReader reader = new BufferedReader(new InputStreamReader(is));//输出的中文乱码
        BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf8")); //GBK
        StringBuilder sb = new StringBuilder();    
        String line = null;    
        try {    
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");    
            }    
        } catch (IOException e) {    
            e.printStackTrace();    
        } finally {    
            try {    
                is.close();    
            } catch (IOException e) {    
               e.printStackTrace();    
            }    
        }    
        return sb.toString();    
    }

}

 

项目实例下载地址(包括对应jar包)

 ps:New text file line delimiter选择不同导致控制台输出编码不同,如下图所示:

posted @ 2015-12-10 18:32  大自然的流风  阅读(35088)  评论(0编辑  收藏  举报