替换 html中换行符、空格 ；去除字符串中的空格\\s*,回车\n,换行符\r,制表符\t

public static String repText(String str) throws Exception {
String r = "";
r = str.replaceAll("<br/>", "\n");
r = r.replaceAll(" ", " ");

return r;

}

public static String isReplaceStr(String str_content) {
String r = "";
Pattern p = Pattern.compile("\\s*|\t|\r|\n");
Matcher m = p.matcher(str_content);
r = m.replaceAll("");
return r;
}