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菜鸟学习java,求大神解释下面的代码各段是什么意思,尽量详细,谢谢
例1源代码:UnZip.javaimportjava.io.*;importjava.util.zip.*;publicclassUnZip{staticfinalint...
例1源代码:
UnZip.java
import java.io.*;
import java.util.zip.*;
public class UnZip {
static final int BUFFER = 2048;
public static void main (String argv[]) {
try {
BufferedOutputStream dest = null;
FileInputStream fis = new
FileInputStream(argv[0]);
ZipInputStream zis = new
ZipInputStream(new BufferedInputStream(fis));
ZipEntry entry;
while((entry = zis.getNextEntry()) != null) {
System.out.println("Extracting: " +entry);
int count;
byte data[] = new byte[BUFFER];
// write the files to the disk
FileOutputStream fos = new
FileOutputStream(entry.getName());
dest = new
BufferedOutputStream(fos,BUFFER);
while ((count = zis.read(data, 0,BUFFER))
!= -1) {
dest.write(data, 0, count);
}
dest.flush();
dest.close();
}
zis.close();
} catch(Exception e) {
e.printStackTrace();
}
}
} 展开
UnZip.java
import java.io.*;
import java.util.zip.*;
public class UnZip {
static final int BUFFER = 2048;
public static void main (String argv[]) {
try {
BufferedOutputStream dest = null;
FileInputStream fis = new
FileInputStream(argv[0]);
ZipInputStream zis = new
ZipInputStream(new BufferedInputStream(fis));
ZipEntry entry;
while((entry = zis.getNextEntry()) != null) {
System.out.println("Extracting: " +entry);
int count;
byte data[] = new byte[BUFFER];
// write the files to the disk
FileOutputStream fos = new
FileOutputStream(entry.getName());
dest = new
BufferedOutputStream(fos,BUFFER);
while ((count = zis.read(data, 0,BUFFER))
!= -1) {
dest.write(data, 0, count);
}
dest.flush();
dest.close();
}
zis.close();
} catch(Exception e) {
e.printStackTrace();
}
}
} 展开
3个回答
展开全部
import java.io.*; //导入jar包
import java.util.zip.*; //导入jar包
public class UnZip {
static final int BUFFER = 2048; //声明并初始化静态常量BUFFER
public static void main (String argv[]) {
try {
BufferedOutputStream dest = null; //声明 BufferedOutputStream 对象dest
FileInputStream fis = new FileInputStream(argv[0]); //实例化FileInputStream对象 fis
ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis)); //用fis实例化ZipInputStream
ZipEntry entry; //声明ZipEntry对象
while((entry = zis.getNextEntry()/*通过getNextEntry()方法获得entry*/) != null) { //如果entry不为空执行下面的语句
System.out.println("Extracting: " +entry); //打印
int count;
byte data[] = new byte[BUFFER]; //实例化BUFFER长度的byte类型的数组
// write the files to the disk
FileOutputStream fos = new FileOutputStream(entry.getName()); //实例化FileOutputStream对象fos
dest = new BufferedOutputStream(fos,BUFFER); //用fos对象实例化dest
while ((count = zis.read(data, 0,BUFFER)) != -1) { //执行read()方法,将返回值放到data中,读取长度为BUFFER,当读到文件末或者读不到一个data数组是跳出循环
dest.write(data, 0, count); //将读到data数组输出
}
dest.flush(); //清空dest
dest.close(); //关闭流
}
zis.close(); //关闭流
} catch(Exception e) {
e.printStackTrace();
}
}
}
import java.util.zip.*; //导入jar包
public class UnZip {
static final int BUFFER = 2048; //声明并初始化静态常量BUFFER
public static void main (String argv[]) {
try {
BufferedOutputStream dest = null; //声明 BufferedOutputStream 对象dest
FileInputStream fis = new FileInputStream(argv[0]); //实例化FileInputStream对象 fis
ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis)); //用fis实例化ZipInputStream
ZipEntry entry; //声明ZipEntry对象
while((entry = zis.getNextEntry()/*通过getNextEntry()方法获得entry*/) != null) { //如果entry不为空执行下面的语句
System.out.println("Extracting: " +entry); //打印
int count;
byte data[] = new byte[BUFFER]; //实例化BUFFER长度的byte类型的数组
// write the files to the disk
FileOutputStream fos = new FileOutputStream(entry.getName()); //实例化FileOutputStream对象fos
dest = new BufferedOutputStream(fos,BUFFER); //用fos对象实例化dest
while ((count = zis.read(data, 0,BUFFER)) != -1) { //执行read()方法,将返回值放到data中,读取长度为BUFFER,当读到文件末或者读不到一个data数组是跳出循环
dest.write(data, 0, count); //将读到data数组输出
}
dest.flush(); //清空dest
dest.close(); //关闭流
}
zis.close(); //关闭流
} catch(Exception e) {
e.printStackTrace();
}
}
}
展开全部
使用ZipInputStream读入一个zip文件
循环输出压缩文件下的所有文件
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展开全部
很明显,这是在复制一个zip文件
追问
谢谢 能帮我注释一下各段代码的含义吗
追答
你先把java 的io部分熟悉一下,然后回来在读这段代码就明白了
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