我就廢話不多說(shuō)了，大家還是直接看代碼吧~

import java.io.UnsupportedEncodingException;import java.net.URLDecoder;import java.net.URLEncoder; /** * Utility class for JavaScript compatible UTF-8 encoding and decoding. * * @see http://stackoverflow.com/questions/607176/java-equivalent-to-javascripts-encodeuricomponent-that-produces-identical-output * @author John Topley */public class EncodingUtil { /** * Decodes the passed UTF-8 String using an algorithm that’s compatible with * JavaScript’s <code>decodeURIComponent</code> function. Returns * <code>null</code> if the String is <code>null</code>. * * @param s The UTF-8 encoded String to be decoded * @return the decoded String */ public static String decodeURIComponent(String s) { if (s == null) { return null; } String result = null; try { result = URLDecoder.decode(s, 'UTF-8'); } // This exception should never occur. catch (UnsupportedEncodingException e) { result = s; } return result; } /** * Encodes the passed String as UTF-8 using an algorithm that’s compatible * with JavaScript’s <code>encodeURIComponent</code> function. Returns * <code>null</code> if the String is <code>null</code>. * * @param s The String to be encoded * @return the encoded String */ public static String encodeURIComponent(String s) { String result = null; try { result = URLEncoder.encode(s, 'UTF-8') .replaceAll('+', '%20') .replaceAll('%21', '!') .replaceAll('%27', '’') .replaceAll('%28', '(') .replaceAll('%29', ')') .replaceAll('%7E', '~'); } // This exception should never occur. catch (UnsupportedEncodingException e) { result = s; } return result; } /** * Private constructor to prevent this class from being instantiated. */ private EncodingUtil() { super(); }}

補(bǔ)充知識(shí)：java 代碼實(shí)現(xiàn)encodeURIComponent和decodeURIComponent，解決空格轉(zhuǎn)義為加號(hào)的問(wèn)題

java自帶有一個(gè) java.net.URLDecoder和java.net.URLEncoder。

通過(guò)這兩個(gè)類，可以調(diào)用encode()或者decode()方法對(duì)字符串進(jìn)行URL編碼。

那既然有了，為什么還要自己實(shí)現(xiàn)一套呢？主要原因是Jdk中并沒(méi)有提供encodeURIComponent和decodeURIComponent的方法。

這兩個(gè)方法作用其實(shí)跟encode()和decode()基本相似。區(qū)別主要是，在java中，url編碼時(shí)，會(huì)把空格轉(zhuǎn)換成+號(hào)。而某些非java語(yǔ)言實(shí)現(xiàn)的客戶端一般空格轉(zhuǎn)義出來(lái)是 %20 ，這樣就容易發(fā)生decode不出這個(gè)空格的問(wèn)題。比如IOS中，會(huì)把這個(gè)+直接顯示了，而不是轉(zhuǎn)義成空格。這就跟我們想要的結(jié)果違背了。比如js中就自帶有encodeURIComponent和decodeURIComponent的方法。

java我們就自己實(shí)現(xiàn)一下吧。直接看代碼，一看就明白。

/* * 文件名：URIEncode.java 描述： 修改人：gogym 修改時(shí)間：2018年11月16日 跟蹤單號(hào)： 修改單號(hào)： 修改內(nèi)容： */ import java.io.UnsupportedEncodingException; public class URIEncoder{ public static final String ALLOWED_CHARS = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.!~*’()'; /** * Description: * * @param str * @return * @throws UnsupportedEncodingException * @see */ public static String encodeURI(String str) throws UnsupportedEncodingException { String isoStr = new String(str.getBytes('UTF8'), 'ISO-8859-1'); char[] chars = isoStr.toCharArray(); StringBuffer sb = new StringBuffer(); for (int i = 0; i < chars.length; i++ ) { if ((chars[i] <= ’z’ && chars[i] >= ’a’) || (chars[i] <= ’Z’ && chars[i] >= ’A’)|| chars[i] == ’-’ || chars[i] == ’_’ || chars[i] == ’.’ || chars[i] == ’!’|| chars[i] == ’~’ || chars[i] == ’*’ || chars[i] == ’’’ || chars[i] == ’(’|| chars[i] == ’)’ || chars[i] == ’;’ || chars[i] == ’/’ || chars[i] == ’?’|| chars[i] == ’:’ || chars[i] == ’@’ || chars[i] == ’&’ || chars[i] == ’=’|| chars[i] == ’+’ || chars[i] == ’$’ || chars[i] == ’,’ || chars[i] == ’#’|| (chars[i] <= ’9’ && chars[i] >= ’0’)) {sb.append(chars[i]); } else {sb.append('%');sb.append(Integer.toHexString(chars[i])); } } return sb.toString(); } /** * Description: * * @param input * @return * @see */ public static String encodeURIComponent(String input) { if (null == input || ''.equals(input.trim())) { return input; } int l = input.length(); StringBuilder o = new StringBuilder(l * 3); try { for (int i = 0; i < l; i++ ) {String e = input.substring(i, i + 1);if (ALLOWED_CHARS.indexOf(e) == -1){ byte[] b = e.getBytes('utf-8'); o.append(getHex(b)); continue;}o.append(e); } return o.toString(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return input; } private static String getHex(byte buf[]) { StringBuilder o = new StringBuilder(buf.length * 3); for (int i = 0; i < buf.length; i++ ) { int n = (int)buf[i] & 0xff; o.append('%'); if (n < 0x10) {o.append('0'); } o.append(Long.toString(n, 16).toUpperCase()); } return o.toString(); }}

/* * 文件名：URIDecode.java 描述： 修改人：gogym 修改時(shí)間：2018年11月16日 跟蹤單號(hào)： 修改單號(hào)： 修改內(nèi)容： */ package com.poly.rbl.plugin.uri; public class URIDecoder{ /** * * Description: * * @param encodedURI * @return * @see */ public static String decodeURIComponent(String encodedURI) { char actualChar; StringBuffer buffer = new StringBuffer(); int bytePattern, sumb = 0; for (int i = 0, more = -1; i < encodedURI.length(); i++ ) { actualChar = encodedURI.charAt(i); switch (actualChar) {case ’%’:{ actualChar = encodedURI.charAt(++i); int hb = (Character.isDigit(actualChar) ? actualChar - ’0’ : 10 + Character.toLowerCase(actualChar) - ’a’) & 0xF; actualChar = encodedURI.charAt(++i); int lb = (Character.isDigit(actualChar) ? actualChar - ’0’ : 10 + Character.toLowerCase(actualChar) - ’a’) & 0xF; bytePattern = (hb << 4) | lb; break;}case ’+’:{ bytePattern = ’ ’; break;}default:{ bytePattern = actualChar;} } if ((bytePattern & 0xc0) == 0x80) { // 10xxxxxxsumb = (sumb << 6) | (bytePattern & 0x3f);if (--more == 0) buffer.append((char)sumb); } else if ((bytePattern & 0x80) == 0x00) { // 0xxxxxxxbuffer.append((char)bytePattern); } else if ((bytePattern & 0xe0) == 0xc0) { // 110xxxxxsumb = bytePattern & 0x1f;more = 1; } else if ((bytePattern & 0xf0) == 0xe0) { // 1110xxxxsumb = bytePattern & 0x0f;more = 2; } else if ((bytePattern & 0xf8) == 0xf0) { // 11110xxxsumb = bytePattern & 0x07;more = 3; } else if ((bytePattern & 0xfc) == 0xf8) { // 111110xxsumb = bytePattern & 0x03;more = 4; } else { // 1111110xsumb = bytePattern & 0x01;more = 5; } } return buffer.toString(); }}

以上這篇java 中類似js encodeURIComponent 函數(shù)的實(shí)現(xiàn)案例就是小編分享給大家的全部?jī)?nèi)容了，希望能給大家一個(gè)參考，也希望大家多多支持好吧啦網(wǎng)。