package com.whyc.util.tool;
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import java.util.Locale;
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import android.util.Log;
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public class URLtoUTF8 {
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private static final String TAG = "URLtoUTF8";
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// 转换为%E4%BD%A0形式
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public static String toUtf8String(String s) {
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StringBuffer sb = new StringBuffer();
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for (int i = 0; i < s.length(); i++) {
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char c = s.charAt(i);
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if (c >= 0 && c <= 255) {
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sb.append(c);
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} else {
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byte[] b;
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try {
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b = String.valueOf(c).getBytes("utf-8");
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} catch (Exception ex) {
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Log.d(TAG, ex.toString());
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b = new byte[0];
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}
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for (int j = 0; j < b.length; j++) {
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int k = b[j];
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if (k < 0)
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k += 256;
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sb.append("%" + Integer.toHexString(k).toUpperCase(Locale.getDefault()));
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}
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}
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}
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return sb.toString();
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}
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// 将%E4%BD%A0转换为汉字
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public static String unescape(String s) {
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StringBuffer sbuf = new StringBuffer();
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int l = s.length();
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int ch = -1;
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int b, sumb = 0;
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for (int i = 0, more = -1; i < l; i++) {
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switch (ch = s.charAt(i)) {
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case '%':
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ch = s.charAt(++i);
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int hb = (Character.isDigit((char) ch) ? ch - '0'
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: 10 + Character.toLowerCase((char) ch) - 'a') & 0xF;
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ch = s.charAt(++i);
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int lb = (Character.isDigit((char) ch) ? ch - '0'
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: 10 + Character.toLowerCase((char) ch) - 'a') & 0xF;
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b = (hb << 4) | lb;
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break;
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case '+':
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b = ' ';
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break;
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default:
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b = ch;
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}
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if ((b & 0xc0) == 0x80) {
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sumb = (sumb << 6) | (b & 0x3f);
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if (--more == 0)
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sbuf.append((char) sumb);
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} else if ((b & 0x80) == 0x00) {
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sbuf.append((char) b);
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} else if ((b & 0xe0) == 0xc0) {
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sumb = b & 0x1f;
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more = 1;
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} else if ((b & 0xf0) == 0xe0) {
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sumb = b & 0x0f;
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more = 2;
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} else if ((b & 0xf8) == 0xf0) {
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sumb = b & 0x07;
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more = 3;
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} else if ((b & 0xfc) == 0xf8) {
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sumb = b & 0x03;
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more = 4;
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} else {
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sumb = b & 0x01;
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more = 5;
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}
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}
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return sbuf.toString();
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}
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}
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