package cn.itcst;import java.io.IOException;
import java.io.PrintWriter;import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class One extends HttpServlet {
private ServletConfig config; public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String value = config.getInitParameter("data");
System.out.println(value);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
}
public void init(ServletConfig config) throws ServletException{
this.config =config;
}}
xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<servlet>
<servlet-name>One</servlet-name>
<servlet-class>cn.itcst.One</servlet-class>
<init-param>
<param-name>data</param-name>
<param-value>hello</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>One</servlet-name>
<url-pattern>/One</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
import java.io.PrintWriter;import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class One extends HttpServlet {
private ServletConfig config; public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String value = config.getInitParameter("data");
System.out.println(value);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
}
public void init(ServletConfig config) throws ServletException{
this.config =config;
}}
xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<servlet>
<servlet-name>One</servlet-name>
<servlet-class>cn.itcst.One</servlet-class>
<init-param>
<param-name>data</param-name>
<param-value>hello</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>One</servlet-name>
<url-pattern>/One</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
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