<%
// 验证m是否包含n
String m = "112yesterday";
String n = "day1";

int oper = -1;

if (m != null && n != null) {
oper = m.indexOf(n);
}

if (oper != -1) {
out.println("字符串:" + m + " 包含字符串" + n);
} else {
out.println("字符串:" + m + " 不包含字符串" + n);
}
%>