一个查找类路径的jsp--想当好用!

m3310 03-04-23

我想知道 system.out.println 是在哪儿定义的?


<%@page import="java.lang.*,java.io.*" %>
<%@page import=
"java.sql.*,java.util.*,java.net.*" %>
<%@page contentType=
"text/html; charset=gb2312" %>
<%!
public class JWhich {
public void Jwhich(){
};
};
%>

<html>
<head>
<title>Jwhich</title>
</head>
<body>
<form action=
"<%=request.getRequestURI()%> " method="post">
<input type=
"text" name="className" size="50" ><br>
<input type=
"submit" value="submit">
<input type=
"Reset" value="Reset">
</form>

<%
String className =request.getParameter(
"className");
if (className != null){
if (!className.startsWith(
"/")) {
className =
"/" + className;
}
className = className.replace('.', '/');
className = className +
".class";
java.net.URL classUrl = new JWhich().getClass().getResource(className);

if (classUrl != null) {
out.println(
"\nClass '" + className +
"' found in \n'" + classUrl.getFile() + "'");
} else {
out.println(
"\nClass '" + className +
"' not found in \n'" +
System.getProperty(
"java.class.path") + "'");
}

}

%>
</body>
<html>
// 在此输入java代码

m3310
2003-04-23 21:41

我想问一下:system.out.println 是在哪儿定义的?