去掉全角空格和半角空格

需求1：將字符串轉換成字符數組

String value = "　　俞子東 ";
        char[] val = new char[value.length()];
        value.getChars(0, value.length(), val, 0);//字符串轉換成字符數組

        System.out.println(val.length)

需求2：將所有的全角空格和半角空格去掉

System.out.println(value.replaceAll("　| ", ""));

需求3：將字符串兩邊的半角空格、全角空格去掉（調用myTrim(value, " 　");）

static String myTrim(String source, String toTrim) {//將字符串兩邊的半角空格、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();
    }

 

完整代碼：

package com.konglong.test;

public class TrimTest {
    public static void main(String[] args) {
        String value = "　　俞子東 ";
        char[] val = new char[value.length()];
        value.getChars(0, value.length(), val, 0);//字符串轉換成字符數組

        System.out.println(val.length);
        
        System.out.println(value.replaceAll("　| ", ""));
        
        System.out.println(myTrim(value, " 　"));
    }

    static String myTrim(String source, String toTrim) {//將字符串兩邊的半角空格、全角空格去掉，其他也可以
        StringBuffer sb = null;
        if (source != null) {
            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 == null ? "" : sb.toString();
    }
}