EscapeAndUnescapeUtil【java模拟js的escape和unescape函数】
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前言
在这里做一个记录，基本代码同参考资料《java模拟js的escape和unescape函数》一样。
效果图
代码分析
escape ： 编码,模拟js的escape函数；
unescape ： 解码,模拟js的unescape函数。
使用步骤
一、项目组织结构图
注意事项：
1、 导入类文件后需要change包名以及重新import R文件路径
2、 Values目录下的文件（strings.xml、dimens.xml、colors.xml等），如果项目中存在，则复制里面的内容，不要整个覆盖
二、导入步骤
（1）将EscapeAndUnescapeUtil复制到项目中
package com.why.project.androidcnblogsdemo.utils; /** * Created by HaiyuKing * Used java模拟js的escape和unescape函数 \u003C == < * http://blog.csdn.net/lululove19870526/article/details/47424091 * http://blog.csdn.net/hujingn/article/details/5791130 */ public class EscapeAndUnescapeUtil { private static String[] hex = { "00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "0A", "0B", "0C", "0D", "0E", "0F", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "1A", "1B", "1C", "1D", "1E", "1F", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "2A", "2B", "2C", "2D", "2E", "2F", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "3A", "3B", "3C", "3D", "3E", "3F", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "4A", "4B", "4C", "4D", "4E", "4F", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "5A", "5B", "5C", "5D", "5E", "5F", "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "6A", "6B", "6C", "6D", "6E", "6F", "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "7A", "7B", "7C", "7D", "7E", "7F", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "8A", "8B", "8C", "8D", "8E", "8F", "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "9A", "9B", "9C", "9D", "9E", "9F", "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9", "AA", "AB", "AC", "AD", "AE", "AF", "B0", "B1", "B2", "B3", "B4", "B5", "B6", "B7", "B8", "B9", "BA", "BB", "BC", "BD", "BE", "BF", "C0", "C1", "C2", "C3", "C4", "C5", "C6", "C7", "C8", "C9", "CA", "CB", "CC", "CD", "CE", "CF", "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7", "D8", "D9", "DA", "DB", "DC", "DD", "DE", "DF", "E0", "E1", "E2", "E3", "E4", "E5", "E6", "E7", "E8", "E9", "EA", "EB", "EC", "ED", "EE", "EF", "F0", "F1", "F2", "F3", "F4", "F5", "F6", "F7", "F8", "F9", "FA", "FB", "FC", "FD", "FE", "FF" }; private static byte[] val = { 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F }; /** * 编码,模拟js的escape函数.<br> * escape不编码字符有69个：*+-./@_0-9a-zA-Z * * @param s 字符串 * @return 转义后的字符串或者null */ public static String escape(String s) { if (s == null) { return null; } StringBuffer sbuf = new StringBuffer(); int len = s.length(); for (int i = 0; i < len; i++) { int ch = s.charAt(i); if ('A' <= ch && ch <= 'Z') { sbuf.append((char) ch); } else if ('a' <= ch && ch <= 'z') { sbuf.append((char) ch); } else if ('0' <= ch && ch <= '9') { sbuf.append((char) ch); } else if (ch == '*' || ch == '+' || ch == '-' || ch == '/' || ch == '_' || ch == '.' || ch == '@') { sbuf.append((char) ch); } else if (ch <= 0x007F) { sbuf.append('%'); sbuf.append(hex[ch]); } else { sbuf.append('%'); sbuf.append('u'); sbuf.append(hex[(ch >>> 8)]); sbuf.append(hex[(0x00FF & ch)]); } } return sbuf.toString(); } /** * 解码,模拟js的unescape函数. 说明：本方法保证 不论参数s是否经过escape()编码，均能得到正确的“解码”结果 * * @param s * @return */ public static String unescape(String s) { if (s == null) { return null; } StringBuffer sbuf = new StringBuffer(); int i = 0; int len = s.length(); while (i < len) { int ch = s.charAt(i); if ('A' <= ch && ch <= 'Z') { sbuf.append((char) ch); } else if ('a' <= ch && ch <= 'z') { sbuf.append((char) ch); } else if ('0' <= ch && ch <= '9') { sbuf.append((char) ch); } else if (ch == '*' || ch == '+' || ch == '-' || ch == '/' || ch == '_' || ch == '.' || ch == '@') { sbuf.append((char) ch); } else if (ch == '%') { int cint = 0; if ('u' != s.charAt(i + 1)) { cint = (cint << 4) | val[s.charAt(i + 1)]; cint = (cint << 4) | val[s.charAt(i + 2)]; i += 2; } else { cint = (cint << 4) | val[s.charAt(i + 2)]; cint = (cint << 4) | val[s.charAt(i + 3)]; cint = (cint << 4) | val[s.charAt(i + 4)]; cint = (cint << 4) | val[s.charAt(i + 5)]; i += 5; } sbuf.append((char) cint); } else { sbuf.append((char) ch); } i++; } return sbuf.toString(); } }
三、使用方法
activity布局如下
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <Button android:id="@+id/btn_escape" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="将“测试样例”进行escape编码"/> <Button android:id="@+id/btn_unescape" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="将“%u6D4B%u8BD5%u6837%u4F8B”进行unescape解码"/> <TextView android:id="@+id/tv_show" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=""/> </LinearLayout>
activity使用如下
package com.why.project.androidcnblogsdemo.activity; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.TextView; import com.why.project.androidcnblogsdemo.R; import com.why.project.androidcnblogsdemo.utils.EscapeAndUnescapeUtil; /** * Created by HaiyuKing * Used EscapeAndUnescapeUtil演示 */ public class EscapeAndUnescapeUtilActivity extends AppCompatActivity { private Button btn_escape; private Button btn_unescape; private TextView tv_show; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_escapeandunescapeutil); initVIews(); initEvents(); } private void initVIews() { btn_escape = (Button) findViewById(R.id.btn_escape); btn_unescape = (Button) findViewById(R.id.btn_unescape); tv_show = (TextView) findViewById(R.id.tv_show); } private void initEvents() { btn_escape.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { tv_show.setText(EscapeAndUnescapeUtil.escape("测试用例")); } }); btn_unescape.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { tv_show.setText(EscapeAndUnescapeUtil.unescape("%u6D4B%u8BD5%u6837%u4F8B")); } }); } }
混淆配置
无
参考资料
项目demo下载地址
暂时空缺
