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tomcat集群 文件上传
由于项目需求变动,原来的java web项目需要用到tomcat集群。运用集群之前需要先解决几个小问题,现在就来说一下,关于文件上传的问题(因为我之前文件是保存在服务器某个文件夹下,访问服务器1tomcat上传的文件,会有服务器2tomcat不能操作的情况):
lz菜鸟,简单的把操作步骤介绍如下,如有不对的地方,欢迎大家留言讨论,谢谢大家!
1.首先,把保存所有文件的文件夹共享;
2.用到的jar包,我用的是:jcifs-1.3.17.jar;
3.向共享目录中上传文件(共享文件名现命名为test)
注:remoteUrl为文件服务器共享文件夹地址。
不需要密码:smb://192.168.0.100/test
如果需要密码:smb://username:password@192.168.0.100/test
localFilePath本地文件地址,如:d:/test2
//上传文件到共享文件夹
public static void smbPut(String remoteUrl,String localFilePath) {
InputStream in = null;
OutputStream out = null;
try {
File localFile = new File(localFilePath);
String fileName = localFile.getName();
SmbFile remoteFile = new SmbFile(remoteUrl+"/"+fileName);
in = new BufferedInputStream(new FileInputStream(localFile));
out = new BufferedOutputStream(new SmbFileOutputStream(remoteFile));
byte[] buffer = new byte[1024];
while(in.read(buffer)!=-1){
out.write(buffer);
buffer = new byte[1024];
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
out.close();
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
上面代码是在网上看到的,别人用了都是没什么问题,但lz在使用过程中,当上传word或excel文件的时候,从服务器直接复制过来会提示错误信息(提示部分内容 丢失,但文件可以打开,内容也可以看到)。搜了很多资料,原来是在字节流出错。简单的做个转换就可解决,如下:
private SmbFile smbFile = null;
private SmbFileOutputStream smbOut = null;
public static void smbPut(String remoteUrl,String localFilePath) {
//连接服务器
try {
smbFile = new SmbFile(remoteUrl);
smbFile.connect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
//上传文件到服务器
BufferedInputStream bf = null;
File file= new File(localFilePath) ;
try {
this.smbOut = new SmbFileOutputStream(remoteUrl, false);
bf = new BufferedInputStream(new FileInputStream(file));
byte[] bt = new byte[8192];
int n = bf.read(bt);
while (n != -1) {
this.smbOut.write(bt, 0, n);
this.smbOut.flush();
n = bf.read(bt);
}
} catch (SmbException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (null != this.smbOut)
this.smbOut.close();
if (null != bf)
bf.close();
} catch (Exception e2) {
e2.printStackTrace();
}
}
}
4.从共享目录下载文件
注:localDir为保存到本地路径,如果不需要保存到本地,直接保存或另存为文件可以把操作localDir的代码去掉。
public static void smbGet(String remoteUrl,String localDir) {
InputStream in = null;
OutputStream out = null;
try {
SmbFile remoteFile = new SmbFile(remoteUrl+"/"+filename);
if(remoteFile==null){
System.out.println("共享文件不存在");
return;
}
String fileName = remoteFile.getName();
File localFile = new File(localDir+File.separator+fileName);
in = new BufferedInputStream(new SmbFileInputStream(remoteFile));
//以下代码为把文件保存到本地某个路径下
out = new BufferedOutputStream(new FileOutputStream(localFile));
byte[] buffer = new byte[1024];
while(in.read(buffer)!=-1){
out.write(buffer);
buffer = new byte[1024];
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
out.close();
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
5.删除共享目录文件
public void removeFile()throws Exception{
int rs = 0;
String filename = getRequest().getParameter("filename");
if(!StringUtil.isBlank(filePath)){
SmbFile file = new SmbFile(remoteUrl+"/"+filename);
if(file.exists()){
//删除附件 同时删除数据库表中的记录
List<Attachment> actlist=getAttachments("htHouseProveFile4");
for(Attachment a:actlist){
String path=a.getAttachmentPath();
String delAttachmentHql = "delete ZTradDatilMsg trad where trad.filePath=‘"+path+"‘";
PropertyChartService service =(PropertyChartService) ApplicationContextUtil.getBean("propertyChartService");
service.deleteHql(delAttachmentHql);
}
if(file.delete()){
rs =1;
}
}
}
ajaxOutPrint(String.valueOf(rs)); //返回操作信息 1成功
}
6.如果文件名有中文,需要转码
//文件名称转码 value为传入文件名称
public static String filterDangerString(String value) {
if (value =http://www.mamicode.com/= null) {
return null;
}
value = http://www.mamicode.com/value.replaceAll("\\|", "");
value = http://www.mamicode.com/value.replaceAll("&", "&");
value = http://www.mamicode.com/value.replaceAll(";", "");
//value = http://www.mamicode.com/value.replaceAll("@", "");
value = http://www.mamicode.com/value.replaceAll("‘", "");
value = http://www.mamicode.com/value.replaceAll("\"", "");
value = http://www.mamicode.com/value.replaceAll("\\‘", "");
value = http://www.mamicode.com/value.replaceAll("\\\"", "");
value = http://www.mamicode.com/value.replaceAll("<", "<");
value = http://www.mamicode.com/value.replaceAll(">", ">");
value = http://www.mamicode.com/value.replaceAll("\\(", "");
value = http://www.mamicode.com/value.replaceAll("\\)", "");
value = http://www.mamicode.com/value.replaceAll("\\+", "");
value = http://www.mamicode.com/value.replaceAll("\r", "");
value = http://www.mamicode.com/value.replaceAll("\n", "");
value = http://www.mamicode.com/value.replaceAll("script", "");
value = http://www.mamicode.com/value.replaceAll("%27", "");
value = http://www.mamicode.com/value.replaceAll("%22", "");
value = http://www.mamicode.com/value.replaceAll("%3E", "");
value = http://www.mamicode.com/value.replaceAll("%3C", "");
value = http://www.mamicode.com/value.replaceAll("%3D", "");
value = http://www.mamicode.com/value.replaceAll("%2F", "");
return value;
}
/**
* 解码
* @param srcStr
* @return
*/
public static String urldecode(String srcStr){
String str= null;
try {
str = java.net.URLDecoder.decode(srcStr,"utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return str ;
}
后续还会补充。。。。。
tomcat集群 文件上传