Java正则表达式过滤汉字

蔚落 2022-08-09 01:48 289阅读 0赞

String  str = "hello你好吗,我很好 thank you";  
    String reg = "[\u2E80-\u9FFF]";  
    Pattern pat = Pattern.compile(reg);    
    Matcher mat = pat.matcher(str);   
    String repickStr = mat.replaceAll("");  
    System.out.println("过滤中文后: "+repickStr);

Demo：

import java.util.regex.Matcher;
    import java.util.regex.Pattern;
    
    public class T {
    
    	
    	/**
    	 * 过滤字母
    	 * @param alphabet
    	 * @return
    	 */
    	public static String filterAlphabet(String alphabet){
    		return alphabet.replaceAll("[A-Za-z]", "");
    	}
    	
    	/**
    	 * 过滤数字
    	 * @param digital
    	 * @return
    	 */
    	public static String filterDigital(String digital){
    		return digital.replaceAll("[0-9]", "");
    	}
    	
    	/**
    	 * 过滤汉字
    	 * @param chin
    	 * @return
    	 */
    	public static String filterChinese(String chin){
    		return chin.replaceAll("[\\u4e00-\\u9fa5]", "");
    	}
    	
    	/**
    	 * 过滤 字母、数字、汉字
    	 * @param character
    	 * @return
    	 */
    	public static String filterAll(String character){
    		return character.replaceAll("[a-zA-Z0-9\\u4e00-\\u9fa5]", "");
        }
    	
    	/**
    	 * @param args
    	 */
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    		String  str = "hello你好吗,我很好 thank you";  
            String reg = "[\u2E80-\u9FFF]";  
            Pattern pat = Pattern.compile(reg);    
            Matcher mat = pat.matcher(str);   
            String repickStr = mat.replaceAll("");  
            System.out.println("过滤中文后: "+repickStr);  
    		
            System.out.println("-----------------");
            
    		System.out.println(filterAlphabet("123abc你好"));
    		System.out.println(filterDigital("123abc你好"));
    		System.out.println(filterChinese("123abc你好"));
    		System.out.println(filterAll("123abc你好"));
    	}
    
    }

作者：[itmyhome][]

[itmyhome]: http://blog.csdn.net/itmyhome1990