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JPBC ing�Q?留言板之三：留言板JSP代码

nonels — Thu, 16 Oct 2008 15:54:00 GMT

摘要: <% @ page language = " ... 阅读全文

nonels 2008-10-16 23:54 发表评论

nonels — Thu, 16 Oct 2008 15:51:00 GMT

在参��C��递过�E�中�Q�经�怼��到中文��q��问题�Q�有好多�U�解��x��法，其中一�U�就是用到过滤器�?br />
CharacterEncodingFilter.java

package filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
/**
* jsp中文��q��的Filter�q��o�?br /> * @author nonels
*
*/

public class CharacterEncodingFilter implements Filter {
    protected String encoding;    //    字符�~�码
    protected boolean ignore;    //    是否忽略大小�?/span>
    public void init(FilterConfig filterConfig) throws ServletException {
        encoding = filterConfig.getInitParameter("encoding");
        String value = filterConfig.getInitParameter("ignore");
        if (value == null) {
            ignore = true;
        } else if (value.equalsIgnoreCase("true")) {
            ignore = true;
        } else if (value.equalsIgnoreCase("yes")) {
            ignore = true;
        }
    }

    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain filterChain) throws IOException, ServletException {
        if (ignore == true || encoding != null) {
             request.setCharacterEncoding(encoding);
             filterChain.doFilter(request, response);
        }
    }

    public void destroy() {
        encoding = null;
    }


}

XML中的配置加上以下�Q?br />

<filter>
 <filter-name>CharacterEncodingFilterfilter-name>
 <filter-class>filter.CharacterEncodingFilterfilter-class>
 <init-param>
 <param-name>ignoreparam-name>
 <param-value>trueparam-value>
 init-param>
 <init-param>
 <param-name>encodingparam-name>
 <param-value>GBKparam-value>
 init-param>
 filter>
 <filter-mapping>
 <filter-name>CharacterEncodingFilterfilter-name>
 <url-pattern>/*url-pattern>
 filter-mapping>

nonels 2008-10-16 23:51 发表评论

nonels — Thu, 16 Oct 2008 15:45:00 GMT

摘要: 首先�Q�先用DAO把数据业务逻辑部分分离开来，因�ؓ我只用到MySQL�Q�所以就省略了工厂类�Q�定了一个业务逻辑的接口及实现它的�c�R�� MessageDAO.java package DAO.iface;import java.util.List;/** *//** * �q�行数据操作的业务逻辑�c�L��口的DAO * @author Administrator * */public int... 阅读全文

nonels 2008-10-16 23:45 发表评论

使用SAX解析XML文档

nonels — Sun, 28 Sep 2008 03:09:00 GMT

摘要: 步骤1.一个简单的XML文档�Q� XML代码�Q?lt;?xml version="1.0" encoding="GBK"?> 赉|�v�?lt;/name> �?lt;/sex> 阅读全文

nonels 2008-09-28 11:09 发表评论

使用DOM解析XML文档

nonels — Sun, 28 Sep 2008 03:03:00 GMT

摘要: 当��用DOM解析XML文档�Ӟ��使用的是DOM的思想�Q�因而不可避免需要将XML文档转换成DOM树。DOM解析器在装入XML文档�Ӟ��已经在内存中��XML文档的每个元素�{换成DOM树的每个节点了�?

对于下面的一个简单XML文档�Q?

xml代码�Q?
阅读全文

nonels 2008-09-28 11:03 发表评论

Tomcat6.0 配置

nonels — Thu, 04 Sep 2008 07:43:00 GMT

    在成功安装JDK的前提下�Q�安装tomcat6.0�Q�假讑֮�装�\径�ؓC�Q�，一般选择FULL安装�Q?.0以上版本不用配置环境变量�Q�系�l�变量中��d��以下环境变量(假定你的j2sdk安装�?/span>c:"jdk1.6�Q�： JAVA_HOME=c:"jdk1.6�?/span>接着可以启动tomcat�Q�在IE中访�?/span>http://localhost:8080�Q�如果看�?/span>tomcat的欢�q�页面的话说明安装成功了�?br />     然后对tomcat�q�行配置�Q?br />     �W�一�?/span>�Q�徏立自��q��jsp app目录�Q?br />        1.�?/span>webapps目录下新��Z��个目录，起名�?/span>myapp�Q?/span>
      2.myapp下新��Z��个目�?/span>WEB-INF�Q�注意，目录名称是区分大��写的；
        3.WEB-INF下新��Z��个文�?/span>web.xml�Q�内容如下：

1 xml version="1.0" encoding="ISO-8859-1"?>
2
3 DOCTYPE web-app
4 PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
5 "http://java.sun.com/dtd/web-app_2_3.dtd">
6
7 <web-app>
8 <display-name>My Web Applicationdisplay-name>
9 <description>
10 A application for test.
11 description>
12 web-app>

4.�?/span>myapp下新��Z��个测试的jsp��面�Q�文件名�?/span>index.jsp�Q�文件内容如�?br />

1 <html>
2 <body>
3 <center>
4 Now time is: <%=new java.util.Date()%>
5 center>
6 body>
7 html>

    5.重启Tomcat
        6.打开��览器，输入http://localhost:8080/myapp/index.jsp看到当前旉��的话说明��成功了

    �W�二�?/span>�Q�徏立自��q��Servlet�Q?br />     写入你的�W�一个Servlet:
    在你新徏的Application myapp/WEB-INF/classes/test目录下新建HelloWorld.java

1 package test;
2
3 import java.io.*;
4 import javax.servlet.*;
5 import javax.servlet.http.*;
6 public class HelloWorld extends HttpServlet
7 {
8 public void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException
9 {
10 response.setContentType("text/html");
11 PrintWriter out = response.getWriter();
12 out.println(""); 13 out.println("This is my first Servlet"); 14 out.println("");
15 out.println("

Hello,World!

");
16     out.println("");
17
18    }
19    }

    把Tomcat中lib里面�?/font>servlet-api.jar文�g拯��到C:"JDK"jre"lib"ext�?/font>�Q�编�?font size="2">HelloWorld.java
    Servlet必须使用C:"Tomcat"webapps"myapp"WEB-INF�q�个目录下面的web.xml文�g�q�行注册�Q�用EditPlus打开�q�个web.xml文�g�Q�在��d��下面�q�段�E�序:

1 package test;
2 public class TestBean
3 {
4     private String name =null;
5     public TestBean(String nameInit){
6         this.name = nameInit;
7     }
8     public void setName(String newName){
9         this.name=newName;
10     }
11     public String getName(){
12         return this.name;
13     }
14 }

       然后照样�?font color="#ff9900">javac TestBean.java来编译这个文件�?br />
      2.然后在你新徏的应用程序目�?font color="#ff0000">myapp下新��Z��个新的jsp文�g�Q�testBean.jsp

1 <%@ page import="test.TestBean" %>
2 <html>
3 <head>
4 <title>Test Beantitle>
5 head>
6 <body>
7 <center>
8 <%
9 TestBean testBean = new TestBean("Http://czl.cn");
10 %>
11 Java Bean Test:
12 The author's blog address is<%=testBean.getName()%>
13 center>
14 body>
15 html>

��定各个文�g的位�|�，如下

myapp"index.jsp
myapp"testBean.jsp
myapp"WEB-INF"web.xml
myapp"WEB-INF"classes"test"HelloWorld.class
myapp"WEB-INF"classes"test"TestBean.class

3.重启Tomcat如果需要的话，在浏览器输入:http://localhost:8080/myapp/testBean.jsp �q�运的话��׃��看到:

Java Bean Test: The author's blog address isHttp://czl.cn

�q�样��完成了整个Tomcat下的jsp、servlet和javabean的配�|��?br />

�W�四步：配置虚拟目录

打开 Tomcat6.0"conf"server.xml 文�g�Q�在 �? 之间加入

nonels 2008-09-04 15:43 发表评论