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ahuango：
dbcp 这个lib在download的时候，用1.5编译不通 ...
Tomcat源码学习（一） -
ssuunn2711：
写的很好，学习了！
Tomcat源码学习（一） -
samy_3：
写的太详细了，不仅技术好，人品更好，谢谢
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chamborghini：
继续呀，怎么没后文了？都两个多月了。
期待中......... ...
Tomcat源码学习（一）
c#
using System;
using System.IO;
/* Originally written in 'C', this code has been converted to the C# language.
* The author's copyright message is reproduced below.
* All modifications from the original to C# are placed in the public domain.
*/
/* jsmin.c
2007-05-22
Copyright (c) 2002 Douglas Crockford (www.crockford.com)
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
The Software shall be used for Good, not Evil.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
namespace JavaScriptSupport
{
class JavaScriptMinifier
{
const int EOF = -1;
StreamReader sr;
StreamWriter sw;
int theA;
int theB;
int theLookahead = EOF;
static void Main( string[] args )
{
if( args.Length != 2 )
{
Console.WriteLine( "invalid arguments, 2 required, 1 in, 1 out" );
return;
}
new JavaScriptMinifier().Minify( args[0], args[1] );
}
public void Minify( string src, string dst )
{
using( sr = new StreamReader( src ) )
{
using( sw = new StreamWriter( dst ) )
{
jsmin();
}
}
}
/* jsmin -- Copy the input to the output, deleting the characters which are
insignificant to JavaScript. Comments will be removed. Tabs will be
replaced with spaces. Carriage returns will be replaced with linefeeds.
Most spaces and linefeeds will be removed.
*/
void jsmin()
{
theA = '\n';
action( 3 );
while( theA != EOF )
{
switch( theA )
{
case ' ':
{
if( isAlphanum( theB ) )
{
action( 1 );
}
else
{
action( 2 );
}
break;
}
case '\n':
{
switch( theB )
{
case '{':
case '[':
case '(':
case '+':
case '-':
{
action( 1 );
break;
}
case ' ':
{
action( 3 );
break;
}
default:
{
if( isAlphanum( theB ) )
{
action( 1 );
}
else
{
action( 2 );
}
break;
}
}
break;
}
default:
{
switch( theB )
{
case ' ':
{
if( isAlphanum( theA ) )
{
action( 1 );
break;
}
action( 3 );
break;
}
case '\n':
{
switch( theA )
{
case '}':
case ']':
case ')':
case '+':
case '-':
case '"':
case '\'':
{
action( 1 );
break;
}
default:
{
if( isAlphanum( theA ) )
{
action( 1 );
}
else
{
action( 3 );
}
break;
}
}
break;
}
default:
{
action( 1 );
break;
}
}
break;
}
}
}
}
/* action -- do something! What you do is determined by the argument:
1 Output A. Copy B to A. Get the next B.
2 Copy B to A. Get the next B. (Delete A).
3 Get the next B. (Delete B).
action treats a string as a single character. Wow!
action recognizes a regular expression if it is preceded by ( or , or =.
*/
void action( int d )
{
if( d <= 1 )
{
put( theA );
}
if( d <= 2 )
{
theA = theB;
if( theA == '\'' || theA == '"' )
{
for( ; ; )
{
put( theA );
theA = get();
if( theA == theB )
{
break;
}
if( theA <= '\n' )
{
throw new Exception( string.Format( "Error: JSMIN unterminated string literal: {0}\n", theA ) );
}
if( theA == '\\' )
{
put( theA );
theA = get();
}
}
}
}
if( d <= 3 )
{
theB = next();
if( theB == '/' && (theA == '(' || theA == ',' || theA == '=' ||
theA == '[' || theA == '!' || theA == ':' ||
theA == '&' || theA == '|' || theA == '?' ||
theA == '{' || theA == '}' || theA == ';' ||
theA == '\n') )
{
put( theA );
put( theB );
for( ; ; )
{
theA = get();
if( theA == '/' )
{
break;
}
else if( theA == '\\' )
{
put( theA );
theA = get();
}
else if( theA <= '\n' )
{
throw new Exception( string.Format( "Error: JSMIN unterminated Regular Expression literal : {0}.\n", theA ) );
}
put( theA );
}
theB = next();
}
}
}
/* next -- get the next character, excluding comments. peek() is used to see
if a '/' is followed by a '/' or '*'.
*/
int next()
{
int c = get();
if( c == '/' )
{
switch( peek() )
{
case '/':
{
for( ; ; )
{
c = get();
if( c <= '\n' )
{
return c;
}
}
}
case '*':
{
get();
for( ; ; )
{
switch( get() )
{
case '*':
{
if( peek() == '/' )
{
get();
return ' ';
}
break;
}
case EOF:
{
throw new Exception( "Error: JSMIN Unterminated comment.\n" );
}
}
}
}
default:
{
return c;
}
}
}
return c;
}
/* peek -- get the next character without getting it.
*/
int peek()
{
theLookahead = get();
return theLookahead;
}
/* get -- return the next character from stdin. Watch out for lookahead. If
the character is a control character, translate it to a space or
linefeed.
*/
int get()
{
int c = theLookahead;
theLookahead = EOF;
if( c == EOF )
{
c = sr.Read();
}
if( c >= ' ' || c == '\n' || c == EOF )
{
return c;
}
if( c == '\r' )
{
return '\n';
}
return ' ';
}
void put( int c )
{
sw.Write( (char)c );
}
/* isAlphanum -- return true if the character is a letter, digit, underscore,
dollar sign, or non-ASCII character.
*/
bool isAlphanum( int c )
{
return ((c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') ||
(c >= 'A' && c <= 'Z') || c == '_' || c == '$' || c == '\\' ||
c > 126);
}
}
}
java
/*
*
* JSMin.java 2006-02-13
*
* Updated 2007-08-20 with updates from jsmin.c (2007-05-22)
*
* Copyright (c) 2006 John Reilly (www.inconspicuous.org)
*
* This work is a translation from C to Java of jsmin.c published by
* Douglas Crockford. Permission is hereby granted to use the Java
* version under the same conditions as the jsmin.c on which it is
* based.
*
*
*
*
* jsmin.c 2003-04-21
*
* Copyright (c) 2002 Douglas Crockford (www.crockford.com)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* The Software shall be used for Good, not Evil.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.inconspicuous.jsmin;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PushbackInputStream;
public class JSMin {
private static final int EOF = -1;
private PushbackInputStream in;
private OutputStream out;
private int theA;
private int theB;
public JSMin(InputStream in, OutputStream out) {
this.in = new PushbackInputStream(in);
this.out = out;
}
/**
* isAlphanum -- return true if the character is a letter, digit,
* underscore, dollar sign, or non-ASCII character.
*/
static boolean isAlphanum(int c) {
return ( (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') ||
(c >= 'A' && c <= 'Z') || c == '_' || c == '$' || c == '\\' ||
c > 126);
}
/**
* get -- return the next character from stdin. Watch out for lookahead. If
* the character is a control character, translate it to a space or
* linefeed.
*/
int get() throws IOException {
int c = in.read();
if (c >= ' ' || c == '\n' || c == EOF) {
return c;
}
if (c == '\r') {
return '\n';
}
return ' ';
}
/**
* Get the next character without getting it.
*/
int peek() throws IOException {
int lookaheadChar = in.read();
in.unread(lookaheadChar);
return lookaheadChar;
}
/**
* next -- get the next character, excluding comments. peek() is used to see
* if a '/' is followed by a '/' or '*'.
*/
int next() throws IOException, UnterminatedCommentException {
int c = get();
if (c == '/') {
switch (peek()) {
case '/':
for (;;) {
c = get();
if (c <= '\n') {
return c;
}
}
case '*':
get();
for (;;) {
switch (get()) {
case '*':
if (peek() == '/') {
get();
return ' ';
}
break;
case EOF:
throw new UnterminatedCommentException();
}
}
default:
return c;
}
}
return c;
}
/**
* action -- do something! What you do is determined by the argument: 1
* Output A. Copy B to A. Get the next B. 2 Copy B to A. Get the next B.
* (Delete A). 3 Get the next B. (Delete B). action treats a string as a
* single character. Wow! action recognizes a regular expression if it is
* preceded by ( or , or =.
*/
void action(int d) throws IOException, UnterminatedRegExpLiteralException,
UnterminatedCommentException, UnterminatedStringLiteralException {
switch (d) {
case 1:
out.write(theA);
case 2:
theA = theB;
if (theA == '\'' || theA == '"') {
for (;;) {
out.write(theA);
theA = get();
if (theA == theB) {
break;
}
if (theA <= '\n') {
throw new UnterminatedStringLiteralException();
}
if (theA == '\\') {
out.write(theA);
theA = get();
}
}
}
case 3:
theB = next();
if (theB == '/' && (theA == '(' || theA == ',' || theA == '=' ||
theA == ':' || theA == '[' || theA == '!' ||
theA == '&' || theA == '|' || theA == '?' ||
theA == '{' || theA == '}' || theA == ';' ||
theA == '\n')) {
out.write(theA);
out.write(theB);
for (;;) {
theA = get();
if (theA == '/') {
break;
} else if (theA == '\\') {
out.write(theA);
theA = get();
} else if (theA <= '\n') {
throw new UnterminatedRegExpLiteralException();
}
out.write(theA);
}
theB = next();
}
}
}
/**
* jsmin -- Copy the input to the output, deleting the characters which are
* insignificant to JavaScript. Comments will be removed. Tabs will be
* replaced with spaces. Carriage returns will be replaced with linefeeds.
* Most spaces and linefeeds will be removed.
*/
public void jsmin() throws IOException, UnterminatedRegExpLiteralException, UnterminatedCommentException, UnterminatedStringLiteralException{
theA = '\n';
action(3);
while (theA != EOF) {
switch (theA) {
case ' ':
if (isAlphanum(theB)) {
action(1);
} else {
action(2);
}
break;
case '\n':
switch (theB) {
case '{':
case '[':
case '(':
case '+':
case '-':
action(1);
break;
case ' ':
action(3);
break;
default:
if (isAlphanum(theB)) {
action(1);
} else {
action(2);
}
}
break;
default:
switch (theB) {
case ' ':
if (isAlphanum(theA)) {
action(1);
break;
}
action(3);
break;
case '\n':
switch (theA) {
case '}':
case ']':
case ')':
case '+':
case '-':
case '"':
case '\'':
action(1);
break;
default:
if (isAlphanum(theA)) {
action(1);
} else {
action(3);
}
}
break;
default:
action(1);
break;
}
}
}
out.flush();
}
class UnterminatedCommentException extends Exception {
}
class UnterminatedStringLiteralException extends Exception {
}
class UnterminatedRegExpLiteralException extends Exception {
}
public static void main(String arg[]) {
try {
JSMin jsmin = new JSMin(new FileInputStream(arg[0]), System.out);
jsmin.jsmin();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (ArrayIndexOutOfBoundsException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (UnterminatedRegExpLiteralException e) {
e.printStackTrace();
} catch (UnterminatedCommentException e) {
e.printStackTrace();
} catch (UnterminatedStringLiteralException e) {
e.printStackTrace();
}
}
}
js 方法见附件
- jsmin.rar (5 KB)
- 下载次数: 55
分享到：
发表评论
-
URL编码表一览
2008-09-25 14:10 7099URL编码表一览 [日期：2005-09-14] 来 ... -
JavaScript,Class,继承
2008-09-05 14:13 1226解开JavaScript生命的达芬奇密码 cle ... -
caller，callee，call，apply
2008-09-05 12:32 935Javascript - 全面理解 caller，callee ... -
js继承
2008-09-04 16:21 1090js继承探讨 每当我们说到js的继承时，在您的脑袋的第一反应就 ... -
MS IE 7 setRequestHeader() 请求拆分和渗透漏洞
2008-06-05 10:33 1304MS IE 7 setRequestHeader() 请求拆分 ... -
弹出广告
2008-05-27 15:05 963<SCRIPT type="text/java ... -
Javascript压缩工具(Javascript compressed,Js压缩)
2008-05-19 17:34 2196Javascript压缩(Js压缩)工具聚合(www.ad0. ... -
在基于 Windows XP 的计算机上查看使用 Jscript 脚本的网页时，Internet E
2008-05-19 17:31 856http://support.microsoft.com/kb ... -
网页的内存与CPU占用
2008-05-13 15:49 1201有的网页看起来并不大 ... -
提高页面相应速度之压缩优化js和css文件
2008-05-13 14:53 1584Steve Souders在他的《High P ... -
用YSlow分析我们页面
2008-05-13 14:50 1500YSlow是yahoo美国开发的一个页面评分插件，非常的棒，从 ... -
脚本装载时一个似乎应该有所重视的问题。
2008-05-05 15:36 1060http://jindw.iteye.com/blog/111 ... -
JS优化原则
2008-05-04 15:40 953转自http://hax.iteye.com/blog ...
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