请问一个字符串处理的问题。

[dql_77]

str1="2003080000000218$2003080000000219$2003080000000070$2003090000000247$2003090000000462$";
str2="2003080000000070$";
如果str1包含str2返回为真，反之返回为假。
请问如何写。

[yalig]

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.util.StringTokenizer"%>
<%
try{



StringTokenizer a, b;
String str1, str2;
str1="2003080000000218$2003080000000219$2003080000000070$2003090000000247$2003090000000462$";
str2="2003080000000218$";

a = new StringTokenizer(str1, "$");
b = new StringTokenizer(str2, "$");
String b2=b.nextToken();
//
while(a.hasMoreElements()){
//out.print(a.nextToken() + "<br>");
//return;
if(b2.equals(a.nextToken())){
out.print("包含<hr>");
}

}

}catch(Exception ex){
out.print(ex.toString());
}
%>

[yalig]

天哪！int i=str1.indexOf(str2); 这样就可以了。

[lovelong1981]

indexOf

public int indexOf(int ch)


Returns the index within this string of the first occurrence of the specified character.

Parameters:

ch - a character.

Returns:

the index of the first occurrence of the character in the character sequence represented by this object, or -1 if the character does not occur.

indexOf

public int indexOf(int ch,
int fromIndex)


Returns the index within this string of the first occurrence of the specified character, starting the search at the specified index.

Parameters:

ch - a character.

fromIndex - the index to start the search from.

Returns:

the index of the first occurrence of the character in the character sequence represented by this object that is greater than or equal to fromIndex, or -1 if the character does not occur.

indexOf

public int indexOf(String str)


Returns the index within this string of the first occurrence of the specified substring.

Parameters:

str - any string.

Returns:

if the string argument occurs as a substring within this object, then the index of the first character of the first such substring is returned; if it does not occur as a substring, -1 is returned.

indexOf

public int indexOf(String str,
int fromIndex)


Returns the index within this string of the first occurrence of the specified substring, starting at the specified index.

Parameters:

str - the substring to search for.

fromIndex - the index to start the search from.

Returns:

If the string argument occurs as a substring within this object at a starting index no smaller than fromIndex, then the index of the first character of the first such substring is returned. If it does not occur as a substring starting at fromIndex or beyond, -1 is returned.

[qixin_lover]

int i=str1.indexOf(str2);
i里是str2在str1中的位置，若是0，就是没有，不包含

[kevincom]

安楼上：qixin_lover(一品) 所说：
如果i为-1则不包含，否则就是包含。