Java环境变量配置如下:
Java_HOME:D:\jdk1.5.0_06CLASSPATH:
.;D:\jdk1.5.0_06\lib;D:\jdk1.5.0_06\lib\tools.jar;D:\jdk1.5.0_06\jre\lib\rt.jar;D:\jdk1.5.0_06\lib\dt.jar;PATH:D:\jdk1.5.0_06;D:\jdk1.5.0_06\bin;可是当把以下两个文件放在同一个目录下编译时怎么都通不过。
HelloServlet3.java
[code]
package moreservlets;import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HelloServlet3 extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String title = "Hello (3)";
out.println(ServletUtilities.headWithTitle(title) +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<H1>" + title + "</H1>\n" +
"</BODY></HTML>");
}
}[/code]
ServletUtilities
[code]
package moreservlets;import javax.servlet.*;
import javax.servlet.http.*;public class ServletUtilities {
public static final String DOCTYPE =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\">"; public static String headWithTitle(String title) {
return(DOCTYPE + "\n" +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n");
}
public static int getIntParameter(HttpServletRequest request,
String paramName,
int defaultValue) {
String paramString = request.getParameter(paramName);
int paramValue;
try {
paramValue = Integer.parseInt(paramString);
} catch(NumberFormatException nfe) { // null or bad format
paramValue = defaultValue;
}
return(paramValue);
}
public static String getCookieValue(Cookie[] cookies,
String cookieName,
String defaultValue) {
if (cookies != null) {
for(int i=0; i<cookies.length; i++) {
Cookie cookie = cookies[i];
if (cookieName.equals(cookie.getName()))
return(cookie.getValue());
}
}
return(defaultValue);
}
public static Cookie getCookie(Cookie[] cookies,
String cookieName) {
if (cookies != null) {
for(int i=0; i<cookies.length; i++) {
Cookie cookie = cookies[i];
if (cookieName.equals(cookie.getName()))
return(cookie);
}
}
return(null);
}
public static String filter(String input) {
StringBuffer filtered = new StringBuffer(input.length());
char c;
for(int i=0; i<input.length(); i++) {
c = input.charAt(i);
if (c == '<') {
filtered.append("<");
} else if (c == '>') {
filtered.append(">");
} else if (c == '"') {
filtered.append(""");
} else if (c == '&') {
filtered.append("&");
} else {
filtered.append(c);
}
}
return(filtered.toString());
}
}[/code]错误信息如下:
HelloServlet3.java:23: 找不到符号
符号: 变量 ServletUtilities
位置: 类 moreservlets.HelloServlet3
out.println(ServletUtilities.headWithTitle(title) +
^
Java_HOME:D:\jdk1.5.0_06CLASSPATH:
.;D:\jdk1.5.0_06\lib;D:\jdk1.5.0_06\lib\tools.jar;D:\jdk1.5.0_06\jre\lib\rt.jar;D:\jdk1.5.0_06\lib\dt.jar;PATH:D:\jdk1.5.0_06;D:\jdk1.5.0_06\bin;可是当把以下两个文件放在同一个目录下编译时怎么都通不过。
HelloServlet3.java
[code]
package moreservlets;import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HelloServlet3 extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String title = "Hello (3)";
out.println(ServletUtilities.headWithTitle(title) +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<H1>" + title + "</H1>\n" +
"</BODY></HTML>");
}
}[/code]
ServletUtilities
[code]
package moreservlets;import javax.servlet.*;
import javax.servlet.http.*;public class ServletUtilities {
public static final String DOCTYPE =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\">"; public static String headWithTitle(String title) {
return(DOCTYPE + "\n" +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n");
}
public static int getIntParameter(HttpServletRequest request,
String paramName,
int defaultValue) {
String paramString = request.getParameter(paramName);
int paramValue;
try {
paramValue = Integer.parseInt(paramString);
} catch(NumberFormatException nfe) { // null or bad format
paramValue = defaultValue;
}
return(paramValue);
}
public static String getCookieValue(Cookie[] cookies,
String cookieName,
String defaultValue) {
if (cookies != null) {
for(int i=0; i<cookies.length; i++) {
Cookie cookie = cookies[i];
if (cookieName.equals(cookie.getName()))
return(cookie.getValue());
}
}
return(defaultValue);
}
public static Cookie getCookie(Cookie[] cookies,
String cookieName) {
if (cookies != null) {
for(int i=0; i<cookies.length; i++) {
Cookie cookie = cookies[i];
if (cookieName.equals(cookie.getName()))
return(cookie);
}
}
return(null);
}
public static String filter(String input) {
StringBuffer filtered = new StringBuffer(input.length());
char c;
for(int i=0; i<input.length(); i++) {
c = input.charAt(i);
if (c == '<') {
filtered.append("<");
} else if (c == '>') {
filtered.append(">");
} else if (c == '"') {
filtered.append(""");
} else if (c == '&') {
filtered.append("&");
} else {
filtered.append(c);
}
}
return(filtered.toString());
}
}[/code]错误信息如下:
HelloServlet3.java:23: 找不到符号
符号: 变量 ServletUtilities
位置: 类 moreservlets.HelloServlet3
out.println(ServletUtilities.headWithTitle(title) +
^
2. 为什么不用eclipse之类的工具 在这种事情上浪费时间不值得
2.我是初学,先不要用IDE比较好其实我只是想不通明明我已经把".;"加入到CLASSPATH中了,可HelloServlet3为什么就是不从当前目录找?
=>这是误导 工欲善其事 必先利其器!
Java_HOME:D:\jdk1.5.0_06=====================
....classpath和path里面 D:\jdk1.5.0_06 为什么不用%Java_HOME%代替?
$javahome$/bin/javac -classpath ./ HelloServlet3.java