关于以下帖子： Appending files to a zip file with Java
我正在尝试解压缩大约5GB的巨大zip文件，因为我的瓶颈是I / O写入，所以我花费的最佳时间是大约30分钟，因此我尝试更改方法并在ZIP本身内部进行修改。 / p>
我的情况很简单：添加几个文件/文件/文件夹，该代码在小型zip文件上可以正常使用，但是在大型zip文件上却不起作用。
我尝试了很多组合...尝试了一些尝试：
第一：
public static void main(String[] args) {
String zip = "/Users/xxx/Documents/test/before.zip";
Map<String, String> env = new HashMap<>();
env.put("create", "true");
Path path = Paths.get(zip);
URI uri = URI.create("jar:" + path.toUri());
try (FileSystem fs = FileSystems.newFileSystem(uri, env)) {
Path toAdd = Paths.get("/Users/xxx/Documents/test/append.txt");
Path directory = fs.getPath("/some/directory");
//create if not exists
Files.createDirectories(directory);
//add to dir new file
Files.copy(toAdd, directory.resolve("replaced.txt"));
} catch (IOException e) {
e.printStackTrace();
}
}
但是我得到了
java.lang.OutOfMemoryError: Java heap space
at sun.util.calendar.Gregorian.newCalendarDate(Gregorian.java:85)
at sun.util.calendar.Gregorian.newCalendarDate(Gregorian.java:37)
at java.util.Date.<init>(Date.java:254)
at com.sun.nio.zipfs.ZipUtils.dosToJavaTime(ZipUtils.java:122)
at com.sun.nio.zipfs.ZipFileSystem$Entry.cen(ZipFileSystem.java:1884)
at com.sun.nio.zipfs.ZipFileSystem$Entry.readCEN(ZipFileSystem.java:1871)
at com.sun.nio.zipfs.ZipFileSystem.sync(ZipFileSystem.java:1257)
at com.sun.nio.zipfs.ZipFileSystem.close(ZipFileSystem.java:277)
at TrueZi.AAA.append200Files7KBExistingFolder(AAA.java:82)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:71)
at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
at org.junit.runner.JUnitCore.run(JUnitCore.java:121)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
或
java.lang.OutOfMemoryError: Java heap space
at com.sun.nio.zipfs.ZipFileSystem$Entry.readCEN(ZipFileSystem.java:1871)
at com.sun.nio.zipfs.ZipFileSystem.sync(ZipFileSystem.java:1257)
at com.sun.nio.zipfs.ZipFileSystem.close(ZipFileSystem.java:277)
at TrueZi.AAA.test(AAA.java:84)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:71)
at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)...
可能是这个吗？
https://community.oracle.com/thread/4123064
另一种说法是（将zip改写为其他zip名称并附加新文件，但平均而言，我需要花费与解压缩相同的时间）：
ZipInputStream original = new ZipInputStream(new BufferedInputStream(new FileInputStream("/Users/xxx/Documents/test/original.zip")));
ZipOutputStream append = new ZipOutputStream(new FileOutputStream("/Users/xxx/Documents/test/rename.zip"));
ZipEntry entry;
while ((entry = original.getNextEntry()) != null) {
append.putNextEntry(entry);
if (!entry.isDirectory()) {
IOUtils.copy(original, append);
}
append.closeEntry();
}
File f = new File(appended);
try (FileInputStream inputStream = new FileInputStream(f)) {
append.putNextEntry(new ZipEntry(f.getName()));
byte[] readBuffer = new byte[4096];
int amountRead;
while ((amountRead = inputStream.read(readBuffer)) > 0) {
append.write(readBuffer, 0, amountRead);
}
} catch (Exception e) {
e.printStackTrace();
}
// close
original.close();
append.close();
我想知道是否还有其他任何选择，既不使用FileSystem，又不将所有巨大的zip重写为其他。...??