Java API中的 java.util.zip.*;包下包含了Java对于压缩文件的所有相关操作。我们可以使用该包中的方法,结合IO中的相关知识,进行文件的压缩和解压缩相关操作。
ZipFile
java中的每一个压缩文件都是可以使用ZipFile来进行表示的。
-
File file =
new File(
"F:/zippath.zip");
-
ZipFile zipFile =
new ZipFile(file);
-
System.out.println(
"压缩文件的名称为:" + zipFile.getName());
压缩单个文件
-
/** 压缩单个文件*/
-
public static void ZipFile(String filepath ,String zippath) {
-
try {
-
File file =
new File(filepath);
-
File zipFile =
new File(zippath);
-
InputStream input =
new FileInputStream(file);
-
ZipOutputStream zipOut =
new ZipOutputStream(
new FileOutputStream(zipFile));
-
zipOut.putNextEntry(
new ZipEntry(file.getName()));
-
int temp =
0;
-
while((temp = input.read()) != -
1){
-
zipOut.write(temp);
-
}
-
input.close();
-
zipOut.close();
-
}
catch (Exception e) {
-
e.printStackTrace();
-
}
-
}
应用:
-
/** 一次性压缩多个文件,文件存放至一个文件夹中*/
-
public static void ZipMultiFile(String filepath ,String zippath) {
-
try {
-
File file =
new File(filepath);
// 要被压缩的文件夹
-
File zipFile =
new File(zippath);
-
InputStream input =
null;
-
ZipOutputStream zipOut =
new ZipOutputStream(
new FileOutputStream(zipFile));
-
if(file.isDirectory()){
-
File[] files = file.listFiles();
-
for(
int i =
0; i < files.length; ++i){
-
input =
new FileInputStream(files[i]);
-
zipOut.putNextEntry(
new ZipEntry(file.getName() + File.separator + files[i].getName()));
-
int temp =
0;
-
while((temp = input.read()) != -
1){
-
zipOut.write(temp);
-
}
-
input.close();
-
}
-
}
-
zipOut.close();
-
}
catch (Exception e) {
-
e.printStackTrace();
-
}
-
}
应用:
-
/** 解压缩(解压缩单个文件)*/
-
public static void ZipContraFile(String zippath ,String outfilepath ,String filename) {
-
try {
-
File file =
new File(zippath);
//压缩文件路径和文件名
-
File outFile =
new File(outfilepath);
//解压后路径和文件名
-
ZipFile zipFile =
new ZipFile(file);
-
ZipEntry entry = zipFile.getEntry(filename);
//所解压的文件名
-
InputStream input = zipFile.getInputStream(entry);
-
OutputStream output =
new FileOutputStream(outFile);
-
int temp =
0;
-
while((temp = input.read()) != -
1){
-
output.write(temp);
-
}
-
input.close();
-
output.close();
-
}
catch (Exception e) {
-
e.printStackTrace();
-
}
-
}
应用:
ZipInputStream类:
当我们需要解压缩多个文件的时候,ZipEntry就无法使用了。
如果想操作更加复杂的压缩文件,我们就必须使用ZipInputStream类。
-
/** 解压缩(压缩文件中包含多个文件)可代替上面的方法使用。
-
* ZipInputStream类
-
* 当我们需要解压缩多个文件的时候,ZipEntry就无法使用了,
-
* 如果想操作更加复杂的压缩文件,我们就必须使用ZipInputStream类
-
* */
-
public static void ZipContraMultiFile(String zippath ,String outzippath){
-
try {
-
File file =
new File(zippath);
-
File outFile =
null;
-
ZipFile zipFile =
new ZipFile(file);
-
ZipInputStream zipInput =
new ZipInputStream(
new FileInputStream(file));
-
ZipEntry entry =
null;
-
InputStream input =
null;
-
OutputStream output =
null;
-
while((entry = zipInput.getNextEntry()) !=
null){
-
System.out.println(
"解压缩" + entry.getName() +
"文件");
-
outFile =
new File(outzippath + File.separator + entry.getName());
-
if(!outFile.getParentFile().exists()){
-
outFile.getParentFile().mkdir();
-
}
-
if(!outFile.exists()){
-
outFile.createNewFile();
-
}
-
input = zipFile.getInputStream(entry);
-
output =
new FileOutputStream(outFile);
-
int temp =
0;
-
while((temp = input.read()) != -
1){
-
output.write(temp);
-
}
-
input.close();
-
output.close();
-
}
-
}
catch (Exception e) {
-
e.printStackTrace();
-
}
-
}
应用:
-
ZipContraMultiFile(
"f:/zippath.zip",
"d:/");
-
ZipContraMultiFile(
"d:/hello.zip",
"d:/");