J2EE开发环境搭建

JDK安装

环境变量设置

java_home = " c:\java\jdk1.6.0_16 "
path += " %java_home%\bin;%java_home%\jre\bin "
classpath = " .;%java_home%\lib\dt.jar;%java_home%\lib\tools.jar "

安装验证

java - version

程序验证

编辑文件HelloWorld . java

public class HelloWorld{
     public static void main(String args[]) {
        System.out.println( " Hello World! " );
    }
}

javac HelloWorld.java
java HelloWorld

Tomcat安装

解压缩
环境变量

CATALINA_HOME = " c:\tomcat "
CATALINA_BASE = " c:\tomcat "
TOMCAT_HOME = " c:\tomcat "
classpath+=" %CATALINA_HOME%\lib\servlet-api.jar"

安装运行

c :\ tomcat \ bin \ 下添加tomcatmonitor快捷方式

tomcat6w . exe // MS // Tomcat6

运行service install安装服务
运行tomcatmonitor.bat启动服务

安装验证

http :// localhost : 8080

jsp验证

在c :\ tomcat \ webapps \ 下建目录myapp
在下建目录WEB - INF
在c :\ tomcat \ webapps \ myapp \ WEB - INF \ 下建文件web . xml

<? xml version="1.0"  encoding="ISO-8859-1" ?>
<! DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" >
< web-app >
     < display-name > My Web Application </ display-name >
     < description > A application for test. </ description >
</ web-app >

在c:\tomcat\webapps\myapp\下建文件index.jsp

< html >
     < body >
         < center > Now time is: <% = new java.util.Date() %> </ center >
     </ body >
</ html >

重启Tomcat
http://localhost:8080/myapp/index.jsp

Eclipse安装

解压c :\ eclipse
配置

启动eclipse
进入window -> perference
选择java -> Installed JRES
选择正确的jre环境
点击编辑 ,
Add External JARS 添加c :\ tomcat \ lib \ 下的servlet . jar , el - api . jar , jasper . jar 和 jsp - api . jar四个文件

建立自己的Servlet

在c :\ tomcat \ webapps \ myapp \ WEB - INF \ classes \ test 下建HelloWorld . java

package test;

import java.io. * ;
import javax.servlet. * ;
import javax.servlet.http. * ;
public class HelloWorld extends HttpServlet
{
    public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
    {
        response.setContentType( " text/html " );
        PrintWriter out = response.getWriter();
        out.println( " <html><head><title> " );
        out.println( " This is my first Servlet " );
        out.println( " </title></head><body> " );
        out.println( " <h1>Hello,World!</h1> " );
        out.println( " </body></html> " );
    }
}

javac HelloWorld.java
打开C:\Tomcat\webapps\myapp\WEB-INF\web.xml
在<web-app></web-app>添加下面这段程序:

< servlet >
     < servlet-name > HelloWorld </ servlet-name >
     < servlet-class > test.HelloWorld </ servlet-class >
</ servlet >
< servlet-mapping >
     < servlet-name > HelloWorld </ servlet-name >
     < url-pattern > /HelloWorld </ url-pattern >
</ servlet-mapping >

重启tomcat
http://localhost:8080/myapp/HelloWorld

建立自己java Bean

在c:\tomcat\webapps\myapp\WEB-INF\classes\test\下建立TestBean.java

package test;
public class TestBean
{
     private String name = null ;
     public TestBean(String nameInit){
         this .name = nameInit;
    }
     public void setName(String newName){
         this .name = newName;
    }
     public String getName(){
         return this .name;
    }
}

javac TestBean.java
在c:\tomcat\webapps\myapp\下新建一个新的jsp文件testBean.jsp

<% @ page import = " test.TestBean " %>
< html >
     < head >
     < title > Test Bean </ title >
     </ head >
     < body >
         < center >
<%
    TestBean testBean = new TestBean( " Http://yexin218.cublog.cn " );
%>
Java Bean Test:
    The author's blog address is <% = testBean.getName() %>
         </ center >
     </ body >
</ html >

重启tomcat
http://localhost:8080/myapp/testBean.jsp

虚拟目录

打开c :\ tomcat \ conf \ server . xml 文件 , 在 < Host > 和 </ Host > 之间加入

< Context path ="/myapp" docBase ="c:\myapp" debug ="0" reloadable ="true" crossContext ="true" />

J2EE开发环境搭建

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