浅谈IDEA实用的Servlet模板

一、前言

不会再idea中创建模板点击这里看教程

二、这是模板内容,直接创建自己的模板复制用即可

#if (${package_name} && ${package_name} != "")package ${package_name};#end
#parse("file header.java")
#set( $packagename1 = "#if (${package_name} && ${package_name} != '')${package_name}.#end#parse('file header.java')" )
#set( $packagename2 = "#if (${package_name} && ${package_name} != '')${package_name}/#end#parse('file header.java')" )
 
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.ioexception;
import java.io.printwriter;
/**
 * @auther liuweirui
 * @date ${date} ${time}
 */
 //更改@webservlet中value的值,可以修改访问该servlet文件的名称,规范value = "/visit name"
@webservlet(name = "${name}", value = "/${name}")
public class ${name} extends httpservlet {
 
    /**
     * constructor of the object.
     */
    public ${name}() {
        super();
    }
 
    /**
     * destruction of the servlet. <br>
     */
    public void destroy() {
        super.destroy(); // just puts "destroy" string in log
        // put your code here
    }
 
    /**
     * the doget method of the servlet. <br>
     * <p>
     * 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 {
        dopost(request, response);
    }
 
    /**
     * the dopost method of the servlet. <br>
     * <p>
     * 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 {
        //设置请求和响应数据的编码
        request.setcharacterencoding("utf-8");
        response.setcharacterencoding("utf-8");
        response.setcontenttype("text/html;charset=utf-8");
        printwriter out = response.getwriter();
        //页面内容
        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. <br>
     *
     * @throws servletexception if an error occurs
     */
    public void init() throws servletexception {
        // put your code here
    }
    
    /**
    * web.xml配置文件书写
    * <servlet>
    *   <servlet-name>${name}</servlet-name>
    *   <servlet-class>$packagename1${name}</servlet-class>
    * </servlet>
    
    * <servlet-mapping>
    *   <servlet-name>${name}</servlet-name>
    *   <url-pattern>/$packagename2${name}</url-pattern>
    * </servlet-mapping>
    */
}

三、优点

1.设置好的请求和响应数据的编码

2.处理好的doget()和dopost()方法

3.记录日期和创建者(创建者自己改,这里我用的本人的)

4.导入好的包和设置好的包名

5.设置好的@webservlet属性,设置@webservlet属性可以替代配置web.xml

6.设置好的配置web.xml文件的内容,复制好即可用

四、问题

web配置文件的内容有些问题,如图:

这是正常情况,在包下创建文件

这是缺省状态下创建的文件

<servlet-class>的内容在缺省状态下会出现package_name.,这是以下这段代码导致的问题

#if (${package_name} && ${package_name} != '')${package_name}.#end#parse('file header.java')

这段代码貌似不能出现在注释内容里,不然就会出问题,在包中创建正常显示,但在缺省状态下就会显示package_name

使用前还需自己修改

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