在实现multipart/form-data的图片上传时,需要用\r\n来分隔每一行,在JAVA中实现multipart/form-data的图片上传时则可以使用System.getProperty("line.separator")来进行每一行的分割。但是如果要将代码用于Android中,则切记不能使用System.getProperty("line.separator")来进行每一行的分割,因为在Android中System.getProperty("line.separator")的结果是\n,在JAVA中则是\r\n。
故不推荐大家使用System.getProperty("line.separator"),会出现一些意想不到的问题,并且出现这些问题还不易追溯到System.getProperty("line.separator")的使用上来。
下面贴上JAVA和Android都可使用的上传代码,改代码是针对Nimg实现,如需要使用与其他环境,则针对环境更改“上传参数”处代码即可。
UploadImage.java
package cloud.test;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.UUID;
/**
* 图片上传
* @author Cloud
* @version 1.0
*/
public class UploadImage {
private static final String MULTIPART_FORM_DATA="multipart/form-data";
private static final String TWOHYPHENS = "--";
private static final String BOUNDARY = "---------------------------"+UUID.randomUUID();
private static final String LINEEND = "\r\n";
private static final String FORMNAME="userfile";
private String actionUrl;
private int timeout;
private String fileName;
private byte[] data;
private String imageType;
/**
* 初始化图片上传工具
* @param actionUrl - 图片存储地址
* @param timeout - 图片上传超时时间 (毫秒)
*/
public UploadImage(String actionUrl,int timeout){
this.actionUrl=actionUrl;
this.timeout=timeout;
}
/**
* 设置上传内容
* @param fileName - 图片名称
* @param data - 图片内容
* @param imageType - 图片格式
*/
public void setData(String fileName,byte[] data,ImageType imageType) throws Exception{
this.fileName=fileName;
this.data=data;
this.imageType=imageType.getValue();
if(imageType!=null){
String extension =imageType.getValue().substring(imageType.getValue().indexOf("/")+1, imageType.getValue().length());
this.fileName=fileName+"."+extension;
}
}
/**
* 上传
* @return - 格式<br/>
* {<br/>
* "code": 200,<br/>
* "msg": "upload success!",<br/>
* "data": {<br/>
* "t": "png",<br/>
* "userpath": "01",<br/>
* "md5": "6f8b47ec3b8ea08335cb6e13cbbe96dc",<br/>
* "url": "01/6f8b47ec3b8ea08335cb6e13cbbe96dc.png"<br/>
* }<br/>
* }<br/>
*/
public String upload(){
return upload(null,null);
}
/**
* 上传
* @param actType - 图片处理命令
* @param param - 图片处理参数
* @return - 格式<br/>
* {<br/>
* "code": 200,<br/>
* "msg": "upload success!",<br/>
* "data": {<br/>
* "t": "png",<br/>
* "userpath": "01",<br/>
* "md5": "6f8b47ec3b8ea08335cb6e13cbbe96dc",<br/>
* "url": "01/6f8b47ec3b8ea08335cb6e13cbbe96dc.png"<br/>
* }<br/>
* }<br/>
*/
public String upload(ActType actType,String param){
HttpURLConnection conn = null;
DataOutputStream output = null;
BufferedReader input = null;
try {
URL url = new URL(actionUrl);
conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(timeout);
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "keep-alive");
conn.setRequestProperty("Content-Type", MULTIPART_FORM_DATA + "; boundary=" + BOUNDARY);
conn.connect();
output = new DataOutputStream(conn.getOutputStream());
StringBuilder sb = new StringBuilder();
if(actType!=null&¶m!=null){
/**
* 上传参数
*/
sb.append(TWOHYPHENS + BOUNDARY + LINEEND);
sb.append("Content-Disposition: form-data; name=\"act\"" + LINEEND);
sb.append(LINEEND);
sb.append(actType.getValue() + LINEEND);
output.writeBytes(sb.toString());
sb = new StringBuilder();
sb.append(TWOHYPHENS + BOUNDARY + LINEEND);
sb.append("Content-Disposition: form-data; name=\"param\"" + LINEEND);
sb.append(LINEEND);
sb.append(param + LINEEND);
output.writeBytes(sb.toString());
}
/**
* 上传图片
*/
sb = new StringBuilder();
sb.append(TWOHYPHENS + BOUNDARY + LINEEND);
sb.append("Content-Disposition: form-data; name=\"" + FORMNAME + "\"; filename=\"" + fileName + "\"" + LINEEND);
sb.append("Content-Type: " + imageType + LINEEND);
sb.append(LINEEND);
output.writeBytes(sb.toString());
output.write(data, 0, data.length);
output.writeBytes(LINEEND);
/**
* 上传结束
*/
output.writeBytes(TWOHYPHENS + BOUNDARY + TWOHYPHENS + LINEEND);
output.flush();
/**
* 返回信息
*/
int code = conn.getResponseCode();
System.out.println(code);
if (code != 200) {
throw new RuntimeException("请求'" + actionUrl + "'失败!");
}
input = new BufferedReader(new InputStreamReader(conn.getInputStream()));
StringBuilder response = new StringBuilder();
String oneLine;
while ((oneLine = input.readLine()) != null) {
response.append(oneLine + LINEEND);
}
return response.toString();
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
try {
if (output != null) {
output.close();
}
if (input != null) {
input.close();
}
} catch (IOException e) {
throw new RuntimeException(e);
}
if (conn != null) {
conn.disconnect();
}
}
}
}
ActType.java
package cloud.test;
/**
* 图像上传命令
* @author Cloud
* @version 1.0
*/
public enum ActType {
/**
* 旋转
*/
ROTATE("rotate"),
/**
* 裁剪
*/
CROP("crop"),
/**
* 缩放
*/
RESIZE("resize");
private String value;
private ActType(String value) {
this.value=value;
}
public String getValue() {
return value;
}
}
ImageType.java
package cloud.test;
/**
* 图片格式
* @author Cloud
* @version 1.0
*/
public enum ImageType {
/**
* JPG格式
*/
JPG("image/jpg"),
/**
* PNG格式
*/
PNG("image/png"),
/**
* GIF格式
*/
GIF("image/gif"),
/**
* JPEG格式
*/
JPEG("image/jpeg");
private String value;
private ImageType(String value) {
this.value=value;
}
public String getValue() {
return value;
}
}
源代码、jar包、说明文档下载地址http://pan.baidu.com/s/1ntxMvBb