@Resource 注入资源方式示例

来源：互联网发布：阿里云外网 iis 404 编辑：程序博客网时间：2024/06/04 00:22

package com.helloweenvsfei.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.annotation.Resource;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class InjectionServlet extends HttpServlet {

 private @Resource(name = "hello")
 String hello;
 private @Resource(name = "i")
 int i;

 @Resource(name = "persons")
 private String persons;

 /**
 * Constructor of the object.
 */
 public InjectionServlet() {
 super();
 }

 /**
 * Destruction of the servlet. 
 */
 public void destroy() {
 super.destroy(); // Just puts "destroy" string in log
 // Put your code here
 }

 /**
 * The doGet method of the servlet. 
 *
 * This method is called when a form has its tag value method equals to get.
 *
 * @param request
 * the request send by the client to the server
 * @param response
 * the response send by the server to the client
 * @throws ServletException
 * if an error occurred
 * @throws IOException
 * if an error occurred
 */
 public void doGet(HttpServletRequest request, HttpServletResponse response)
 throws ServletException, IOException {

 response.setCharacterEncoding("UTF-8");
 request.setCharacterEncoding("UTF-8");




 response.setContentType("text/html");
 PrintWriter out = response.getWriter();
 out
 .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
 out.println("<HTML>");
 out.println(" <HEAD><TITLE>资源注入</TITLE></HEAD>");
 out.println("<style>body {font-size:12px;}</style>");
 out.println("注入的字符串:   - "+hello+" ");
 out.println("注入的整数:   - "+i+" ");
 out.println("注入的字符串数组: ");
 for(String person:persons.split(",")){
 out.println("  - "+person+" ");

 }
 out.println(" <BODY>");
 out.println(" </BODY>");
 out.println("</HTML>");
 out.flush();
 out.close();
 }

 /**
 * The doPost method of the servlet. 
 *
 * This method is called when a form has its tag value method equals to
 * post.
 *
 * @param request
 * the request send by the client to the server
 * @param response
 * the response send by the server to the client
 * @throws ServletException
 * if an error occurred
 * @throws IOException
 * if an error occurred
 */
 public void doPost(HttpServletRequest request, HttpServletResponse response)
 throws ServletException, IOException {

 response.setContentType("text/html");
 PrintWriter out = response.getWriter();
 out
 .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
 out.println("<HTML>");
 out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
 out.println(" <BODY>");
 out.print(" This is ");
 out.print(this.getClass());
 out.println(", using the POST method");
 out.println(" </BODY>");
 out.println("</HTML>");
 out.flush();
 out.close();
 }

 /**
 * Initialization of the servlet. 
 *
 * @throws ServletException
 * if an error occurs
 */
 public void init() throws ServletException {
 // Put your code here
 }

}

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 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_2_5.xsd">
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>InjectionServlet</servlet-name>
<servlet-class>com.helloweenvsfei.servlet.InjectionServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>InjectionServlet</servlet-name>
<url-pattern>/servlet/InjectionServlet</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<login-config>
<auth-method>BASIC</auth-method>
</login-config>
<env-entry>
<env-entry-name>hello</env-entry-name>
<env-entry-type>java.lang.String</env-entry-type>
<env-entry-value>Hello, Welcom to the JavaEE Resource Injection.</env-entry-value>
</env-entry>
<env-entry>
<env-entry-name>i</env-entry-name>
<env-entry-type>java.lang.Integer</env-entry-type>
<env-entry-value>30</env-entry-value>
</env-entry>
<env-entry>
<env-entry-name>persons</env-entry-name>
<env-entry-type>java.lang.String</env-entry-type>
<env-entry-value>Helloween,Cobain,Roses,Axl,</env-entry-value>
</env-entry>
</web-app>