Java tutorial
//package com.java2s; /* * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class Main { /** * Escape html entities. * @param str The input string. * @return The HTML escaped output string. */ public static String htmlEscape(String str) { StringBuilder sb = new StringBuilder(); int size = str.length(); for (int i = 0; i < size; i++) { char c = str.charAt(i); switch (c) { case '<': { sb.append("<"); break; } case '>': { sb.append(">"); break; } case '"': { sb.append("""); break; } case '&': { sb.append("&"); break; } default: { int cc = Character.getNumericValue(c); if (cc < 0xA0) { sb.append(c); } else { // encode in unicode reference sb.append("&#").append(Integer.toString(cc)).append(';'); } break; } } } return sb.toString(); } }