一、修改Servlet的默认模板代码
使用MyEclipse创建Servlet时，根据默认的Servlet模板生成的Servlet代码如下：
1 package gacl.servlet.study; 2 3 import java.io.IOException; 4 import java.io.PrintWriter; 5 6 import javax.servlet.ServletException; 7 import javax.servlet.http.HttpServlet; 8 import javax.servlet.http.HttpServletRequest; 9 import javax.servlet.http.HttpServletResponse;10 11 public class ServletDefaultTemplateCode extends HttpServlet {12 13/**14* The doGet method of the servlet. <br>15*16* This method is called when a form has its tag value method equals to get.17* 18* @param request the request send by the client to the server19* @param response the response send by the server to the client20* @throws ServletException if an error occurred21* @throws IOException if an error occurred22*/23public void doGet(HttpServletRequest request, HttpServletResponse response)24 throws ServletException, IOException {25 26 response.setContentType("text/html");27 PrintWriter out = response.getWriter();28 out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");29 out.println("<HTML>");30 out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");31 out.println(" <BODY>");32 out.print(" This is ");33 out.print(this.getClass());34 out.println(", using the GET method");35 out.println(" </BODY>");36 out.println("</HTML>");37 out.flush();38 out.close();39}40 41/**42* The doPost method of the servlet. <br>43*44* This method is called when a form has its tag value method equals to post.45* 46* @param request the request send by the client to the server47* @param response the response send by the server to the client48* @throws ServletException if an error occurred49* @throws IOException if an error occurred50*/51public void doPost(HttpServletRequest request, HttpServletResponse response)52 throws ServletException, IOException {53 54 response.setContentType("text/html");55 PrintWriter out = response.getWriter();56 out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");57 out.println("<HTML>");58 out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");59 out.println(" <BODY>");60 out.print(" This is ");61 out.print(this.getClass());62 out.println(", using the POST method");63 out.println(" </BODY>");64 out.println("</HTML>");65 out.flush();66 out.close();67}68 69 }
在实际开发中，这些生成的代码和注释一般我们都用不到的，每次都要手工删除这些注释和代码，很麻烦，因此可以根据开发的实际情况修改Servlet的模板代码，改成符合实际开发需求的模板代码。下面以MyEclipse 10为例进行说明如何修改Servlet的模板代码
具体步骤如下：找到MyEclipse安装目录下的\Common\plugins文件夹，比如：D:\MyEclipse10\Common\plugins，然后找到com.genuitec.eclipse.wizards_9.0.0.me08091322.jar这个jar文件，为了方便查找com.genuitec.eclipse.wizards_9.0.0.me08091322.jar这个jar文件，建议使用【SearchEverything】这样的文件查找工具，如下图所示：
用压缩工具打开，注意是打开不是解压这个jar包，如下图所示：
打开com.genuitec.eclipse.wizards_9.0.0.me08091322.jar这个jar文件后，可以看到里面有一个templates文件夹，进入templates文件夹，可以看到里面有一个Servlet.java文件，如下图所示：
打开Servlet.java文件，可以看到里面的模板代码：
1 #---------------------------------------------# 2 # <aw:description>Template for Servlet</aw:description> 3 # <aw:version>1.1</aw:version> 4 # <aw:date>04/05/</aw:date> 5 # <aw:author>Ferret Renaud</aw:author> 6 #---------------------------------------------# 7 8 <aw:import>java.io.IOException</aw:import> 9 <aw:import>java.io.PrintWriter</aw:import> 10 11 <aw:import>javax.servlet.ServletException</aw:import> 12 <aw:import>javax.servlet.http.HttpServlet</aw:import> 13 <aw:import>javax.servlet.http.HttpServletRequest</aw:import> 14 <aw:import>javax.servlet.http.HttpServletResponse</aw:import> 15 16 <aw:parentClass>javax.servlet.http.HttpServlet</aw:parentClass> 17 18 <aw:constructor name="c1"> 19/** 20* Constructor of the object. 21*/ 22public <aw:className/>() { 23 super(); 24} 25 26 </aw:constructor> 27 28 <aw:method name="doGet"> 29/** 30* The doGet method of the servlet. <br> 31* 32* This method is called when a form has its tag value method equals to get. 33* 34* @param request the request send by the client to the server 35* @param response the response send by the server to the client 36* @throws ServletException if an error occurred 37* @throws IOException if an error occurred 38*/ 39public void doGet(HttpServletRequest request, HttpServletResponse response) 40 throws ServletException, IOException { 41 42 response.setContentType("text/html"); 43 PrintWriter out = response.getWriter(); 44 out.println( 45 "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); 46 out.println("<HTML>"); 47 out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); 48 out.println(" <BODY>"); 49 out.print(" This is "); 50 out.print(this.getClass()); 51 out.println(", using the GET method"); 52 out.println(" </BODY>"); 53 out.println("</HTML>"); 54 out.flush(); 55 out.close(); 56} 57 58 </aw:method> 59 60 <aw:method name="doPost"> 61/** 62* The doPost method of the servlet. <br> 63* 64* This method is called when a form has its tag value method equals to post. 65* 66* @param request the request send by the client to the server 67* @param response the response send by the server to the client 68* @throws ServletException if an error occurred 69* @throws IOException if an error occurred 70*/ 71public void doPost(HttpServletRequest request, HttpServletResponse response) 72 throws ServletException, IOException { 73 74 response.setContentType("text/html"); 75 PrintWriter out = response.getWriter(); 76 out.println( 77 "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); 78 out.println("<HTML>"); 79 out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); 80 out.println(" <BODY>"); 81 out.print(" This is "); 82 out.print(this.getClass()); 83 out.println(", using the POST method"); 84 out.println(" </BODY>"); 85 out.println("</HTML>"); 86 out.flush(); 87 out.close(); 88} 89 90 </aw:method> 91 92 <aw:method name="doPut"> 93/** 94* The doPut method of the servlet. <br> 95* 96* This method is called when a HTTP put request is received. 97* 98* @param request the request send by the client to the server 99* @param response the response send by the server to the client100* @throws ServletException if an error occurred101* @throws IOException if an error occurred102*/103public void doPut(HttpServletRequest request, HttpServletResponse response)104 throws ServletException, IOException {105 106 // Put your code here107}108 109 </aw:method>110 111 <aw:method name="doDelete">112/**113* The doDelete method of the servlet. <br>114*115* This method is called when a HTTP delete request is received.116* 117* @param request the request send by the client to the server118* @param response the response send by the server to the client119* @throws ServletException if an error occurred120* @throws IOException if an error occurred121*/122public void doDelete(HttpServletRequest request, HttpServletResponse response)123 throws ServletException, IOException {124 125 // Put your code here126}127 128 </aw:method>129 130 <aw:method name="init">131/**132* Initialization of the servlet. <br>133*134* @throws ServletException if an error occurs135*/136public void init() throws ServletException {137 // Put your code here138}139 140 </aw:method>141 142 <aw:method name="destroy">143/**144* Destruction of the servlet. <br>145*/146public void destroy() {147 super.destroy(); // Just puts "destroy" string in log148 // Put your code here149}150 151 </aw:method>152 153 <aw:method name="getServletInfo">154/**155* Returns information about the servlet, such as 156* author, version, and copyright. 157*158* @return String information about this servlet159*/160public String getServletInfo() {161 return "This is my default servlet created by Eclipse";162}163 164 </aw:method>
修改该模板，根据自己的实际情况进行修改，比如
删除doGet和doPost里面的代码和方法注释，在doPost方法里面调用doGet，这是根据实际情况修改成的模板代码，修改好之后，保存，重启MyEclipse，使用MyEclipse创建Servlet，此时就是用刚才修改过的模板进行生成了，生成的代码如下：
1 package gacl.servlet.study; 2 3 import java.io.IOException; 4 5 import javax.servlet.ServletException; 6 import javax.servlet.http.HttpServlet; 7 import javax.servlet.http.HttpServletRequest; 8 import javax.servlet.http.HttpServletResponse; 9 10 public class ServletNewTemplateCode extends HttpServlet {11 12public void doGet(HttpServletRequest request, HttpServletResponse response)13 throws ServletException, IOException {14 15}16 17public void doPost(HttpServletRequest request, HttpServletResponse response)18 throws ServletException, IOException {19 doGet(request, response);20}21 22 }
二、修改jsp的默认模板
同样也是找到com.genuitec.eclipse.wizards_9.0.0.me08091322.jar这个jar文件，用压缩工具打开，进入templates\jsp文件夹，可以看到MyEclipse自带的那些jsp模板，如下图所示：
这些jsp模板是MyEclipse自带的，我们也可以依样画葫芦，根据平时项目开发中的实际情况，创建一个jsp模板，然后添加到jsp目录中，操作步骤如下：
1、随便复制一个jsp模板出来(如：Jsp.vtl)，复制到系统的桌面或者系统的其他盘进行存储
2、修改复制出来的模板，使用记事本或者editplus打开Jsp.vtl，可以看到Jsp.vtl的模板代码，如下所示：
1 #*---------------------------------------------# 2 # Template for a JSP 3 # @version: 1.2 4 # @author: Ferret Renaud 5 # @author: Jed Anderson 6 #---------------------------------------------# 7 *#<%@ page language="java" import="java.util.*" pageEncoding="$encoding"%> 8 <% 9 String path = request.getContextPath();10 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";11 %>12 13 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">14 <html>15 <head>16<base href="<%=basePath%>">1718<title>My JSP '$title' starting page</title>1920#parse( "templates/jsp/JSPMetaTags.vtl" )21 </head>22 23 <body>24This is my JSP page. <br>25 </body>26 </html>
这是Jsp.vtl的模板原始代码，这个模板的代码对于我来说不太符合项目开发中的实际情况，需要修改，修改后的模板如下：
1 #*---------------------------------------------# 2 # Template for a JSP 3 # @version: 1.2 4 # @author: 孤傲苍狼 5 #---------------------------------------------# 6 *#<%@ page language="java" pageEncoding="UTF-8"%> 7 <!DOCTYPE HTML> 8 <html> 9 <head>10<title></title>11 </head>12 13 <body>1415 </body>16 </html>
为了避免覆盖原来的Jsp.vtl模板，将修改后的Jsp.vtl模板重命名，例如重命名成gacl.vtl。
3.将gacl.vtl模板复制，然后粘贴到com.genuitec.eclipse.wizards_9.0.0.me08091322.jar包里面的templates\jsp文件夹里。
4、从查看解压文件的界面中，返回到根目录(即com.genuitec.eclipse.wizards_9.0.0.me08091322.jar目录)，找到模版配置文件templates.xml，如下图所示：
同样，将templates.xml文件复制到桌面，使用记事本或者editplus打开进行修改。
修改如下：在<templateLibrary>里添加如下元素：
1 <template2 context="com.genuitec.eclipse.wizards.jsp"3 script="templates/jsp/gacl.vtl"4 name="gacl-JSP template"/>
其中：
1、templates/jsp/gacl.vtl：为新添加的jsp模板的相对路径。
2、gacl-JSP template：为MyEclipse中所要标识的模版名称，MyEclipse新建JSP文件时通过这个名字来选择对应的模版。
3、context="com.genuitec.eclipse.wizards.jsp" 这个一定要存在，并且跟其他jsp模板的设置一样，复制就可以。
templates.xml修改后的内容如下图所示：
5、修改完成后，将com.genuitec.eclipse.wizards_9.0.0.me08091322.jar包中的templates.xml文件删除掉，然后将修改过后的templates.xml复制，粘贴到com.genuitec.eclipse.wizards_9.0.0.me08091322.jar包中，如下图所示：
到此，我们的Jsp模板就算是创建好了。
6.启动MyEclipse，然后新创建一个Jsp页面，此时就可以使用我们自定义的那个Jsp页面模板了，如下图所示：
通过以上两种方式，我们在开发的时候，就可以根据我们自己的开发习惯来定制servlet和jsp的模板了，对于开发效率上或多或少有一点提高吧，不用每次都把MyEclipse生成的很多用不到的代码删掉。
