package weaver.general;
import java.io.bufferedinputstream;
import java.io.bufferedoutputstream;
import java.io.bufferedreader;
import java.io.bufferedwriter;
import java.io.bytearrayoutputstream;
import java.io.chararraywriter;
import java.io.file;
import java.io.fileinputstream;
import java.io.fileoutputstream;
import java.io.filereader;
import java.io.filewriter;
import java.io.inputstream;
import java.io.outputstream;
import java.io.reader;
import java.io.writer;
/**
* provides encoding of raw bytes to base64-encoded characters, and decoding of
* base64 characters to raw bytes. date: 06 august 1998 modified: 14 february
* 2000 modified: 22 september 2000
*
* @author kevin kelley (kelley@ruralnet.net)
* @version 1.3
*/
public class base64 {
/**
* returns an array of base64-encoded characters to represent the passed
* data array.
*
* @param data
* the array of bytes to encode
* @return base64-coded character array.
*/
public static char[] encode(byte[] data) {
char[] out = new char[((data.length + 2) / 3) * 4];
//
// 3 bytes encode to 4 chars. output is always an even
// multiple of 4 characters.
//
for (int i = 0, index = 0; i < data.length; i += 3, index += 4) {
boolean quad = false;
boolean trip = false;
int val = (0xff & data[i]);
val <<= 8;
if ((i + 1) < data.length) {
val |= (0xff & data[i + 1]);
trip = true;
}
val <<= 8;
if ((i + 2) < data.length) {
val |= (0xff & data[i + 2]);
quad = true;
}
out[index + 3] = alphabet[(quad ? (val & 0x3f) : 64)];
val >>= 6;
out[index + 2] = alphabet[(trip ? (val & 0x3f) : 64)];
val >>= 6;
out[index + 1] = alphabet[val & 0x3f];
val >>= 6;
out[index + 0] = alphabet[val & 0x3f];
}
return out;
}
/**
* decodes a base-64 encoded stream to recover the original data. white
* space before and after will be trimmed away, but no other manipulation of
* the input will be performed.
*
* as of version 1.2 this method will properly handle input containing junk
* characters (newlines and the like) rather than throwing an error. it does
* this by pre-parsing the input and generating from that a count of valid
* input characters.
**/
public static byte[] decode(char[] data) {
// as our input could contain non-base64 data (newlines,
// whitespace of any sort, whatever) we must first adjust
// our count of usable data so that...
// (a) we don't misallocate the output array, and
// (b) think that we miscalculated our data length
// just because of extraneous throw-away junk
int templen = data.length;
for (int ix = 0; ix < data.length; ix++) {
if ((data[ix] > 255) || codes[data[ix]] < 0)
--templen; // ignore non-valid chars and padding
}
// calculate required length:
// -- 3 bytes for every 4 valid base64 chars
// -- plus 2 bytes if there are 3 extra base64 chars,
// or plus 1 byte if there are 2 extra.
int len = (templen / 4) * 3;
if ((templen % 4) == 3)
len += 2;
if ((templen % 4) == 2)
len += 1;
byte[] out = new byte[len];
int shift = 0; // # of excess bits stored in accum
int accum = 0; // excess bits
int index = 0;
// we now go through the entire array (not using the 'templen' value)
for (int ix = 0; ix < data.length; ix++) {
int value = (data[ix] > 255) ? -1 : codes[data[ix]];
if (value >= 0)// skip over non-code
{
accum <<= 6; // bits shift up by 6 each time thru
shift += 6; // loop, with new bits being put in
accum |= value; // at the bottom.
if (shift >= 8)// whenever there are 8 or more shifted in,
{
shift -= 8; // write them out (from the top, leaving any
out[index++] = // excess at the bottom for next iteration.
(byte) ((accum >> shift) & 0xff);
}
}
// we will also have skipped processing a padding null byte ('=')
// here;
// these are used only for padding to an even length and do not
// legally
// occur as encoded data. for this reason we can ignore the fact
// that
// no index++ operation occurs in that special case: the out[] array
// is
// initialized to all-zero bytes to start with and that works to our
// advantage in this combination.
}
// if there is still something wrong we just have to throw up now!
if (index != out.length) {
throw new error("miscalculated data length (wrote " + index
+ " instead of " + out.length + ")");
}
return out;
}
//
// code characters for values 0..63
//
private static char[] alphabet = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/="
.tochararray();
//
// lookup table for converting base64 characters to value in range 0..63
//
private static byte[] codes = new byte[256];
static {
for (int i = 0; i < 256; i++)
codes[i] = -1;
for (int i = 'a'; i <= 'z'; i++)
codes[i] = (byte) (i - 'a');
for (int i = 'a'; i <= 'z'; i++)
codes[i] = (byte) (26 + i - 'a');
for (int i = '0'; i <= '9'; i++)
codes[i] = (byte) (52 + i - '0');
codes['+'] = 62;
codes['/'] = 63;
}
// /////////////////////////////////////////////////
// remainder (main method and helper functions) is
// for testing purposes only, feel free to clip it.
// /////////////////////////////////////////////////
public static void main(string[] args) {
boolean decode = false;
if (args.length == 0) {
system.out.println("usage: java base64 [-d[ecode]] filename");
system.exit(0);
}
for (int i = 0; i < args.length; i++) {
if ("-decode".equalsignorecase(args[i]))
decode = true;
else if ("-d".equalsignorecase(args[i]))
decode = true;
}
string filename = args[args.length - 1];
file file = new file(filename);
if (!file.exists()) {
system.out
.println("error: file '" + filename + "' doesn't exist!");
system.exit(0);
}
if (decode) {
char[] encoded = readchars(file);
byte[] decoded = decode(encoded);
writebytes(file, decoded);
} else {
byte[] decoded = readbytes(file);
char[] encoded = encode(decoded);
writechars(file, encoded);
}
}
private static byte[] readbytes(file file) {
bytearrayoutputstream baos = new bytearrayoutputstream();
try {
inputstream fis = new fileinputstream(file);
inputstream is = new bufferedinputstream(fis);
int count = 0;
byte[] buf = new byte[16384];
while ((count = is.read(buf)) != -1) {
if (count > 0)
baos.write(buf, 0, count);
}
is.close();
} catch (exception e) {
e.printstacktrace();
}
return baos.tobytearray();
}
private static char[] readchars(file file) {
chararraywriter caw = new chararraywriter();
try {
reader fr = new filereader(file);
reader in = new bufferedreader(fr);
int count = 0;
char[] buf = new char[16384];
while ((count = in.read(buf)) != -1) {
if (count > 0)
caw.write(buf, 0, count);
}
in.close();
} catch (exception e) {
e.printstacktrace();
}
return caw.tochararray();
}
private static void writebytes(file file, byte[] data) {
try {
outputstream fos = new fileoutputstream(file);
outputstream os = new bufferedoutputstream(fos);
os.write(data);
os.close();
} catch (exception e) {
e.printstacktrace();
}
}
private static void writechars(file file, char[] data) {
try {
writer fos = new filewriter(file);
writer os = new bufferedwriter(fos);
os.write(data);
os.close();
} catch (exception e) {
e.printstacktrace();
}
}
// /////////////////////////////////////////////////
// end of test code.
// /////////////////////////////////////////////////
}
package weaver.general;
import java.io.file;
import java.io.fileinputstream;
import java.util.hashmap;
import java.util.map;
import java.util.properties;
public class basebean {
private static map<string, properties> propertymap = new hashmap<string, properties>();
public string getpropvalue(string config_file, string key) {
if (propertymap.get(config_file) == null) {
readpro(config_file);
}
properties pro = propertymap.get(config_file);
return pro.getproperty(key);
}
private void readpro(string config_file) {
properties pro = new properties();
fileinputstream in;
try {
string path = thread.currentthread().getcontextclassloader()
.getresource("").tostring();
path = path.substring(6, path.indexof("classes/"));
path = path + "prop/" + config_file + ".properties";
path = path.replace("%20", " ");
system.out.println(path);
file f = new file(path);
if (!f.exists()) {
throw new runtimeexception("要读取的文件不存在");
}
in = new fileinputstream(f);
pro.load(in);
in.close();
propertymap.put(config_file, pro);
} catch (exception e) {
e.printstacktrace();
}
}
}
package weaver.general;
public class util {
public static int getintvalue(string value) {
try {
return integer.parseint(value);
} catch (numberformatexception e) {
e.printstacktrace();
return 0;
}
}
}
编程语言
发布于：2021-10-07 12:43
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