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修复验证码位数的bug，优化代码

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synchronized
2018-07-27 12:02:33 +08:00
parent a4e61fd633
commit a548f7af0b
16 changed files with 675 additions and 461 deletions
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39
src/main/java/com/wf/captcha/Encoder.java
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@@ -4,40 +4,20 @@ import java.io.IOException;
import java.io.OutputStream;
/**
* @author: wuhongjun
* @version:1.0
*
*/
public class Encoder
{
public class Encoder {
private static final int EOF = -1;
// 图片的宽高
private int imgW, imgH;
private byte[] pixAry;
private int initCodeSize;
private int remaining;
private int curPixel;
// GIFCOMPR.C - GIF Image compression routines
//
// Lempel-Ziv compression based on 'compress'. GIF modifications by
// David Rowley (mgardi@watdcsu.waterloo.edu)
// General DEFINEs
private int initCodeSize; // 验证码位数
private int remaining; // 剩余数量
private int curPixel; // 像素
static final int BITS = 12;
static final int HSIZE = 5003; // 80% occupancy
// GIF Image compression - modified 'compress'
//
// Based on: compress.c - File compression ala IEEE Computer, June 1984.
//
// By Authors: Spencer W. Thomas (decvax!harpo!utah-cs!utah-gr!thomas)
// Jim McKie (decvax!mcvax!jim)
// Steve Davies (decvax!vax135!petsd!peora!srd)
// Ken Turkowski (decvax!decwrl!turtlevax!ken)
// James A. Woods (decvax!ihnp4!ames!jaw)
// Joe Orost (decvax!vax135!petsd!joe)
static final int HSIZE = 5003; // 80% 占用率
int n_bits; // number of bits/code
int maxbits = BITS; // user settable max # bits/code
@@ -108,7 +88,7 @@ public class Encoder
0x1FFF,
0x3FFF,
0x7FFF,
0xFFFF };
0xFFFF};
// Number of characters so far in this 'packet'
int a_count;
@@ -184,7 +164,8 @@ public class Encoder
output(ClearCode, outs);
outer_loop : while ((c = nextPixel()) != EOF) {
outer_loop:
while ((c = nextPixel()) != EOF) {
fcode = (c << maxbits) + ent;
i = (c << hshift) ^ ent; // xor hashing