java正则表达式提取数字、英文、中文

直接上代码吧

package net.qmgf.proj.wbmining.fut.service.impl;


import com.itextpdf.text.log.Logger;
import com.itextpdf.text.log.LoggerFactory;

import java.util.regex.Matcher;
import java.util.regex.Pattern;


/**
 * 正则
 *
 * @author He
 * @date 2020/9/3 14:42
 * @return
 **/
public class RegTest {

    public static void main(String[] args) {

        String str = "……^1dsf  の  adS   DFASFSADF阿德斯防守对方asdfsadf37《？：？@%#￥%#￥%@#$%#@$%^><?1234";
        String regEx = "[a-zA-Z]";
        Pattern p = Pattern.compile(regEx);
        Matcher m = p.matcher(str);
        StringBuffer sb = new StringBuffer();
        while (m.find()) {
            sb.append(m.group());
        }
        System.out.println(sb);
    }
}

1. 提取中文：regEx=“[\u4e00-\u9fa5]";
2. 提取数字：regEx=“[0-9]";
3. 提取英文：regEx=“[a-zA-Z]";
4. 提取英文和数字：regEx=“[a-zA-Z0-9]";