JAVA中去掉空格 1. String.trim() trim()是去掉首尾空格 2.str.replace(" ", ""); 去掉所有空格,包括首尾、中间 String str = " hell o "; String str2 = str.replaceAll(" ", ""); System.out.println(str2); 3.或者replaceAll(" +",""); 去掉所有空格 4.str = .replaceAll("\\s*", ""); 可以替换大部分空白字符, 不限于空格 \s 可以匹配空格、制表符、换页符等空白字符的其中任意一个 java去掉全角空格和半角空格的方法, 需求1:将字符串转换成字符数组 String value = " 俞子东 "; char[] val = new char[value.length()]; value.getChars(0, value.length(), val, 0);//字符串转换成字符数组 System.out.println(val.length) 需求2:将所有的全角空格和半角空格去掉 System.out.println(value.replaceAll(" | ", "")); 需求3:将字符串两边的半角空格、全角空格去掉(调用myTrim(value, " ");) static String myTrim(String source, String toTrim) {//将字符串两边的半角空格、全角空格去掉,其他也可以 StringBuffer sb = new StringBuffer(source); while (toTrim.indexOf(new Character(sb.charAt(0)).toString()) != -1) { sb.deleteCharAt(0); } while (toTrim.indexOf(new Character(sb.charAt(sb.length() - 1)) .toString()) != -1) { sb.deleteCharAt(sb.length() - 1); } return sb.toString(); } 完整代码: package com.konglong.test; public class TrimTest { public static void main(String[] args) { String value = " 俞子东 "; char[] val = new char[value.length()]; value.getChars(0, value.length(), val, 0);//字符串转换成字符数组 System.out.println(val.length); System.out.println(value.replaceAll(" | ", "")); System.out.println(myTrim(value, " ")); } static String myTrim(String source, String toTrim) {//将字符串两边的半角空格、全角空格去掉,其他也可以 StringBuffer sb = new StringBuffer(source); while (toTrim.indexOf(new Character(sb.charAt(0)).toString()) != -1) { sb.deleteCharAt(0); } while (toTrim.indexOf(new Character(sb.charAt(sb.length() - 1)) .toString()) != -1) { sb.deleteCharAt(sb.length() - 1); } return sb.toString(); } }
时间: 2024-10-13 12:31:09