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java to determine characters. Whether the string contains Chinese and filter out Chinese, the specific content is as follows
1. Determine whether the string contains Chinese method encapsulation
/** * 判断字符串中是否包含中文 * @param str * 待校验字符串 * @return 是否为中文 * @warn 不能校验是否为中文标点符号 */ public static boolean isContainChinese(String str) { Pattern p = Pattern.compile("[\u4e00-\u9fa5]"); Matcher m = p.matcher(str); if (m.find()) { return true; } return false; }
Note: Need to import
import java.util.regex.Matcher;
import java.util.regex.Pattern;
##2. Filter Chinese
/** * 过滤掉中文 * @param str 待过滤中文的字符串 * @return 过滤掉中文后字符串 */ public static String filterChinese(String str) { // 用于返回结果 String result = str; boolean flag = isContainChinese(str); if (flag) {// 包含中文 // 用于拼接过滤中文后的字符 StringBuffer sb = new StringBuffer(); // 用于校验是否为中文 boolean flag2 = false; // 用于临时存储单字符 char chinese = 0; // 5.去除掉文件名中的中文 // 将字符串转换成char[] char[] charArray = str.toCharArray(); // 过滤到中文及中文字符 for (int i = 0; i < charArray.length; i++) { chinese = charArray[i]; flag2 = isChinese(chinese); if (!flag2) {// 不是中日韩文字及标点符号 sb.append(chinese); } } result = sb.toString(); } return result; }Description: isChinese(char) method, see article: java Chinese and special character verification
3. Test
public static void main(String[] args) { String fileName = "test,中文"; System.out.println(filterChinese(fileName)); }
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