1.根据地址获取文件
/**
* 根据地址获取文件
* @param listURL
* @return
*/
public static File getNetUrlHttp(List listURL) {
String netUrl = (String) listURL.get(0);
//对本地文件命名
String fileName = (String) listURL.get(1);
File file = null;
URL urlfile;
InputStream inStream = null;
OutputStream os = null;
try {
file = File.createTempFile("net_url", fileName);
//下载
urlfile = new URL(netUrl);
inStream = urlfile.openStream();
os = new FileOutputStream(file);
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ((bytesRead = inStream.read(buffer, 0, 8192)) != -1) {
os.write(buffer, 0, bytesRead);
}
} catch (Exception e) {
log.error("图片获取错误："+netUrl);
e.printStackTrace();
} finally {
try {
if (null != os) {
os.close();
}
if (null != inStream) {
inStream.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
return file;
}
2.根据文件获取MD5值
public static String getMD5(File file) {
FileInputStream fis = null;
try {
MessageDigest md = MessageDigest.getInstance("MD5");
fis = new FileInputStream(file);
byte[] buffer = new byte[8192];
int length = -1;
/*System.out.println("开始算");*/
while ((length = fis.read(buffer)) != -1) {
md.update(buffer, 0, length);
}
/*System.out.println("算完了");*/
return bytesToString(md.digest());
} catch (IOException ex) {
log.error((MD5Util.class.getName()), ex);
return null;
} catch (NoSuchAlgorithmException ex) {
log.error((MD5Util.class.getName()), ex);
return null;
} finally {
try {
fis.close();
} catch (IOException ex) {
log.error((MD5Util.class.getName()), ex);
}
}
}
3.上传文件至文件服务器
/**
* 上传文件至文件服务器
*
* @param url 服务器地址
* @param targetPath 保存路径
* @param buff 文件二进制
* @param name 文件名
* @param urlEncode 是否需要urlencode
* @return
* @throws ClientProtocolException
* @throws IOException
*/
public static String doPostHSImageUploadFile(String url, String targetPath, byte[] buff, String name, boolean urlEncode) throws ClientProtocolException, IOException {
CloseableHttpClient httpClient = HttpClients.createDefault();
SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmss");
String beginTime = format.format(new Date());
String realMd5 = Encryptions.getMD5str(targetPath + beginTime + "com.siit.image.showimage_");
String tp = new String(targetPath.getBytes("UTF-8"), "UTF-8");
if (urlEncode) {
tp = new String(URLEncoder.encode(targetPath, "utf-8").getBytes("UTF-8"), "UTF-8");
}
try {
Header[] headers = {
new BasicHeader("targetpath", tp),
new BasicHeader("vls", realMd5),
new BasicHeader("time", beginTime)
};
HttpPost httpPost = new HttpPost(url);
//设置请求超时时间,4.3后，如果不设置超时时间，默认是24小时
RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(60000).setConnectTimeout(60000).build();//设置请求和传输超时时间
httpPost.setConfig(requestConfig);
//设置一个文件对象参数
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
builder.addBinaryBody("multipartFile", buff, ContentType.create("application/octet-stream"), name);
//设置其它参数内容
String p = new String(targetPath.getBytes("UTF-8"), "UTF-8");
builder.addTextBody("savePath", tp);
DateFormat dateformat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String timen = dateformat.format(new Date());
builder.addTextBody("time", timen);
String iMd5 = Encryptions.getMD5str(timen + p + VAL_ENCODE_KEY);
builder.addTextBody("timeMd5", iMd5);
builder.setCharset(CharsetUtils.get("UTF-8"));
HttpEntity fileEntity = builder.build();
httpPost.setEntity(fileEntity);
httpPost.setHeaders(headers);
// 发起请求 并返回请求的响应
CloseableHttpResponse response = httpClient.execute(httpPost);
try {
// 获取响应对象
HttpEntity resEntity = response.getEntity();
if (resEntity != null) {
JSONObject result = new JSONObject();
String mesg = EntityUtils.toString(resEntity, Charset.forName("UTF-8"));
try {
result = JSONObject.fromObject(mesg);
} catch (Exception e) {
if ("result:1".equals(mesg)) {
result.put("result", "1");
} else {
log.error("返回值格式非JSON格式：" + mesg);
result.put("result", "0");
}
}
return result.toString();
}
// 销毁
EntityUtils.consume(resEntity);
} catch (Exception ex) {
log.error("上传结果解析异常：", ex);
} finally {
response.close();
}
} catch (Exception ex) {
log.error("上传异常：", ex);
} finally {
httpClient.close();
}
return null;
}
获取UUID：
String uuid = UUID.randomUUID().toString().replaceAll("-", "");
获取文件后缀名
String fileType =""
if(fileFileName.lastIndexOf(".")>0){
fileType = fileFileName.substring(fileFileName.lastIndexOf(".")+1);
System.out.println("type::"+fileType);
}
截取括号中的值
String st1="aa(sadfjsdkf)";
int index1 = st1.indexOf('(');
int index2 = st1.indexOf(')');
String result = st1.substring(index1 + 1, index2);
System.out.println(result);
获取年、月、日、时、分
Calendar calendar = java.util.Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH);
int date = calendar.get(Calendar.DATE);
int hour = calendar.get(Calendar.HOUR_OF_DAY);
int minute = calendar.get(Calendar.MINUTE);
System.out.println("年："+year+">>月："+month+">>日："+date+">>时："+hour+">>分："+minute);
获取指定的时间格式
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd hh.mm.ss.SSSSSS");
String fmDate=simpleDateFormat.format(new Date());
特殊字符 分割的时候使用:
关于点的问题是用 : String.split("[.]"); String.split("\.") ;
关于竖线的问题用 : String.split("\|");
关于星号的问题用 : String.split("\*");
关于斜线的问题用 : Sring.split("\\");
