Java数据库处理的方法库DBUtil(6)

*/

private static int[] computeFailure(byte[] pattern) {

int[] failure = new int[pattern.length];

int j = 0;

for (int i = 1; i < pattern.length; i++) {

while (j>0 && pattern[j] != pattern[i]) {

j = failure[j - 1];

}

if (pattern[j] == pattern[i]) {

j++;

}

failure[i] = j;

}

return failure;

}

3.将字节流的详细信息显示

//HEX字节流显示

public static String dumpBytesAsHEX(byte[] bytes) {

int idx = 0;

String s = “”;

StringBuilder body = new StringBuilder();

for (int i=0;i<1024&&i<bytes.length;i++) {

byte b = bytes[i];

int hex = ((int) b) & 0xff;

String shex = Integer.toHexString(hex).toUpperCase();

if (1 == shex.length()) {

body.append(”0″);

}

body.append(shex);

body.append(” “);

idx++;

// if (16 == idx) {

// s = body.toString();

// body = new StringBuilder();

// idx = 0;

// }

}

if (idx != 0) {

s = body.toString();

}

return s;

}