使用Servlet
1.将(TomcatRoot)\common\lib\servlet-api.jar;加入到CLASSPATH中
2.编写HelloServlet.java
package com.javaworld.CH2;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class HelloServlet extends HttpServlet
{
public void init(ServletConfig config) throws ServletException
{
super.init(config);
}
public void doGet(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException
{
response.setContentType("text/html;charset=GB2312");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head><title>这是文档的标题</title></head>");
out.println("<body>");
out.println("Hello World!<br/>");
out.println("你好!<br/>");
out.println("世界你好!<br/>");
out.println("</body>");
out.println("</html>");
out.close();
}
public String getServletInfo()
{
return "com.javaworld.CH2.HelloServlet Information";
}
}
3.<1>javac编译 HelloServlet.java <2>拷贝HelloServlet.class到形如E:\jsproot\ROOT\WEB-INF\classes\com\javaworld\CH2的目录下
4.配置E:\jsproot\ROOT\WEB-INF\web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<servlet>
<servlet-name>HelloWorld</servlet-name>
<servlet-class>HelloWorld</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloWorld</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>com.javaworld.CH2.HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloServlet</servlet-name>
<url-pattern>/HelloServlet</url-pattern>
</servlet-mapping>
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
5.开启Tomcat，运行 http://localhost:8080/HelloServlet
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