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
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
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
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
61 Map
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：
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