中文乱码在项目中是经常会遇到的情况。当我们通过设置request和response字符集，但是还是出现中文乱码的时候，今天给介绍一种通过java方法实现判断string是否为乱码的方法。/**

* 判断字符串是否是乱码

*

* @param strName 字符串

* @return 是否是乱码

*/

public static boolean isMessyCode(String strName) {

Pattern p = Pattern.compile("\\s*|t*|r*|n*");

Matcher m = p.matcher(strName);

String after = m.replaceAll("");//去重为空的情况

String temp = after.replaceAll("\\p{P}", "");

char[] ch = temp.trim().toCharArray();

float chLength = ch.length;

float count = 0;

for (int i = 0; i < ch.length; i++) {

char c = ch[i];

if (!Character.isLetterOrDigit(c)) {

if (!isChinese(c)) {

count = count + 1;

}

}

}

float result = count / chLength;

if (result > 0.4) {

return true;

} else {

return false;

}

}

/**

* 判断字符是否是中文

*

* @param c 字符

* @return 是否是中文

*/

public static boolean isChinese(char c) {

Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);

if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS

|| ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS

|| ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A

|| ub == Character.UnicodeBlock.GENERAL_PUNCTUATION

|| ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION

|| ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {

return true;

}

return false;

}

定义调用：public static void main(String[] args) {

// TODO Auto-generated method stub

/*List list = new ArrayList();

Map, String> map = new HashMap<>();*/

String messcode = "ss201888asdf;#????";

System.out.println(">>>>>>>>>>:"+isMessyCode(messcode));

}

输出结果：>>>>>>>>>>:false

更多java知识请关注PHP中文网java基础教程栏目。