在Nick Wilson回答之前：
我正在Glassfish 3下开发Java EE 6 Web应用程序。主要特点是能够上传大文件（1Gb更大）。当我尝试上传文件（400MB大小）时，我收到 java.lang.OutOfMemoryError 异常：
Caused by: java.lang.OutOfMemoryError
at java.io.FileInputStream.readBytes(Native Method)
at java.io.FileInputStream.read(FileInputStream.java:272)
at com.google.common.io.ByteStreams.read(ByteStreams.java:899)
at com.google.common.io.ByteStreams.readFully(ByteStreams.java:733)
at com.google.common.io.ByteStreams.readFully(ByteStreams.java:714)
at org.richfaces.request.BaseUploadedFile.getData(BaseUploadedFile.java:68)
at EJB.FileUploadBean.listener(FileUploadBean.java:147)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.sun.el.parser.AstValue.invoke(AstValue.java:254)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at org.richfaces.event.MethodExpressionEventListener.processEvent(MethodExpressionEventListener.java:125)
我已经在Glassfish JVM选项中增加了内存：
-XX:MaxPermSize=256m
-XX:PermSize=128m
-XX:NewRatio=2
-XX:+UseParallelGC
-Xmx2048m
我尝试使用以下代码上传文件，但两者都给出了同样的错误：
InputStream filecontent = null;
int read = 0;
final byte[] bytes = new byte[1024];
OutputStream fop = null;
File fout;
if (file.getLength() > 0) {
try {
fout = new File(filename);
fop = new FileOutputStream(fout);
filecontent = item.getInputStream();
if (!fout.exists()) {
fout.createNewFile();
}
while ((read = filecontent.read(bytes)) != -1) {
fop.write(bytes, 0, read);
}
和
FileOutputStream fop = null;
File fout;
if (file.getLength() > 0) {
try {
fout = new File(filename);
fop = new FileOutputStream(fout);
if (!fout.exists()) {
fout.createNewFile();
}
fop.write(item.getData());
fop.flush();
fop.close();
我该如何解决这个问题？
感谢
在Nick Wilson回答之后
我将代码更改为：
public void listener(FileUploadEvent event) throws Exception {
ufile = new UploadFile();
InputStream filecontent = null;
UploadedFile item = event.getUploadedFile();
if (item instanceof UploadedFile25) {
filecontent = ((UploadedFile25) item).getInputStream();
} else {
filecontent = item.getInputStream();
}
UploadedText file = new UploadedText();
file.setLength(item.getData().length);
file.setName(item.getName());
Date date = new Date();
String epoch = fDir + String.valueOf(date.getTime());
File fPath = new File(epoch);
fPath.mkdir();
//file.setData(item.getData());
files.add(file);
String filename = epoch + '/' + item.getName();
int read = 0;
final byte[] bytes = new byte[1024];
OutputStream fop = null;
File fout;
if (file.getLength() > 0) {
try {
fout = new File(filename);
fop = new FileOutputStream(fout);
if (!fout.exists()) {
fout.createNewFile();
}
while ((read = filecontent.read(bytes)) != -1) {
fop.write(bytes, 0, read);
}
但我收到同样的例外。
能够上传大文件（1Gb更大）。当我尝试上传文件（400MB大小）时，我收到 java.lang.OutOfMemoryError 异常：
Caused by: java.lang.OutOfMemoryError
at java.io.FileInputStream.readBytes(Native Method)
at java.io.FileInputStream.read(FileInputStream.java:272)
at com.google.common.io.ByteStreams.read(ByteStreams.java:899)
at com.google.common.io.ByteStreams.readFully(ByteStreams.java:733)
at com.google.common.io.ByteStreams.readFully(ByteStreams.java:714)
at org.richfaces.request.BaseUploadedFile.getData(BaseUploadedFile.java:68)
at EJB.FileUploadBean.listener(FileUploadBean.java:147)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.sun.el.parser.AstValue.invoke(AstValue.java:254)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at org.richfaces.event.MethodExpressionEventListener.processEvent(MethodExpressionEventListener.java:125)
我已经在Glassfish JVM选项中增加了内存：
-XX:MaxPermSize=256m
-XX:PermSize=128m
-XX:NewRatio=2
-XX:+UseParallelGC
-Xmx2048m
我尝试使用以下代码上传文件，但两者都给出了同样的错误：
InputStream filecontent = null;
int read = 0;
final byte[] bytes = new byte[1024];
OutputStream fop = null;
File fout;
if (file.getLength() > 0) {
try {
fout = new File(filename);
fop = new FileOutputStream(fout);
filecontent = item.getInputStream();
if (!fout.exists()) {
fout.createNewFile();
}
while ((read = filecontent.read(bytes)) != -1) {
fop.write(bytes, 0, read);
}
和
FileOutputStream fop = null;
File fout;
if (file.getLength() > 0) {
try {
fout = new File(filename);
fop = new FileOutputStream(fout);
if (!fout.exists()) {
fout.createNewFile();
}
fop.write(item.getData());
fop.flush();
fop.close();
我该如何解决这个问题？
感谢
在Nick Wilson回答之后
我将代码更改为：
public void listener(FileUploadEvent event) throws Exception {
ufile = new UploadFile();
InputStream filecontent = null;
UploadedFile item = event.getUploadedFile();
if (item instanceof UploadedFile25) {
filecontent = ((UploadedFile25) item).getInputStream();
} else {
filecontent = item.getInputStream();
}
UploadedText file = new UploadedText();
file.setLength(item.getData().length);
file.setName(item.getName());
Date date = new Date();
String epoch = fDir + String.valueOf(date.getTime());
File fPath = new File(epoch);
fPath.mkdir();
//file.setData(item.getData());
files.add(file);
String filename = epoch + '/' + item.getName();
int read = 0;
final byte[] bytes = new byte[1024];
OutputStream fop = null;
File fout;
if (file.getLength() > 0) {
try {
fout = new File(filename);
fop = new FileOutputStream(fout);
if (!fout.exists()) {
fout.createNewFile();
}
while ((read = filecontent.read(bytes)) != -1) {
fop.write(bytes, 0, read);
}
但我收到同样的例外。
Caused by: java.lang.OutOfMemoryError
at java.io.FileInputStream.readBytes(Native Method)
at java.io.FileInputStream.read(FileInputStream.java:272)
at com.google.common.io.ByteStreams.read(ByteStreams.java:899)
at com.google.common.io.ByteStreams.readFully(ByteStreams.java:733)
at com.google.common.io.ByteStreams.readFully(ByteStreams.java:714)
at org.richfaces.request.BaseUploadedFile.getData(BaseUploadedFile.java:68)
at EJB.FileUploadBean.listener(FileUploadBean.java:157)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.sun.el.parser.AstValue.invoke(AstValue.java:254)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at org.richfaces.event.MethodExpressionEventListener.processEvent(MethodExpressionEventListener.java:125)
... 38 more
我不知道如何解决： - （
答案 0 :(得分：0)
您需要确保为JVM提供了适当的堆大小，检查配置并确保-Xms设置为512但-Xmx值远大于文件大小，特别是在加载时将整个文件存入内存。
答案 1 :(得分：0)
您应该能够从上传的文件中流式传输数据，而不是调用getData：
public void listener(FileUploadEvent event) throws Exception {
UploadedFile item = event.getUploadedFile();
InputStream is = item.getInputStream();
.....
调用item.getData()将导致整个文件被加载到内存中。