程序師世界是廣大編程愛好者互助、分享、學習的平台,程序師世界有你更精彩!
首頁
編程語言
C語言|JAVA編程
Python編程
網頁編程
ASP編程|PHP編程
JSP編程
數據庫知識
MYSQL數據庫|SqlServer數據庫
Oracle數據庫|DB2數據庫
 程式師世界 >> 編程語言 >> 網頁編程 >> JSP編程 >> 關於JSP >> JBuilder2005開發Web應用程序

JBuilder2005開發Web應用程序

編輯:關於JSP
JBuilder是一個開放的Java IDE,它集成了Tomcat、Weblogic等服務器。雖然JDK、Tomcat、Weblogic不斷升級,我們仍可以在JBuilder中使用它們的最新版本。由於Tomcat服務器的配置比較復雜,習慣了Windows平台的程序員常常對Tomcat的使用感到困惑。本文給出了一個使用Tomcat環境下的數據庫連接池Database Connection Pool (DBCP) 的例子,說明了用JBuilder開發Web應用的一般步驟,並回答了一些經常遇到的問題。

  JBuilder2005所帶JDK的版本是1.4.2_04-b05,其文件放在目錄JBuilder_HOMEjdk1.4下,Tomcat的最新版本是5.0.27,其文件放在目錄JBuilder_HOME hirdparty jakarta-tomcat-5.0.27下。下面首先給出給出了一個使用Tomcat環境下的數據庫連接池Database Connection Pool (DBCP) 的例子。

  1. File-New Project新建工程文件,輸入工程文件名稱myWeb和目錄C:myWeb

  2. Project-Project Properties設置工程文件的屬性,選擇Tomcat為服務器

  3. File-New新建Web Module(WAR)

  輸入Web Module的名稱DBTest和目錄DBTest

  4. File-New新建JSP,輸入jsp文件的名稱test.jsp,產生test.jsp文件後修改test.jsp的內容

  Test.jsp:

  <%@ page contentType="text/html; charset=Big5" %>
  <html>
  <head>
  <title>DB Test</title>
  </head>
  <body>
  <%
  foo.DBTest tst = new foo.DBTest();
  tst.init();
  %>
  <h2>Results</h2>
  Foo <%= tst.getFoo() %><br/>
  Bar <%= tst.getBar() %>
  </body>
  </html>

  將會生成一個名稱為test的runtime configuration。

  選Run-Configurations-Edit可修改runtime configuration,特別是可以指定服務器的端口號和是否自動搜索為被占用的端口。

  5. File-New Class,輸入類名DBTest和包名foo,產生DBTest.java文件後修改它的內容

  DBTest.java

  package foo;

  import javax.naming.*;
  import javax.sql.*;
  import java.sql.*;
  public class DBTest {
  String foo = "Not Connected";
  int bar = -1;
  public void init() {
  try{
   Context ctx = new InitialContext();
   if(ctx == null )
    throw new Exception("Boom - No Context");
    DataSource ds =(DataSource)ctx.lookup("java:comp/env/jdbc/TestDB");
    if (ds != null) {
     Connection conn = ds.getConnection();
     if(conn != null) {
      foo = "Got Connection "+conn.toString();
      Statement stmt = conn.createStatement();
      ResultSet rst =stmt.executeQuery("select id, foo, bar from testdata");
      if(rst.next()) {
       foo=rst.getString(2);
       bar=rst.getInt(3);
      }
      conn.close();
     }
    }
   }catch(Exception e) {
    e.printStackTrace();
   }
  }
  public String getFoo() { return foo; }
  public int getBar() { return bar;}
  }



  6. 修改web.xml的內容

  web.xml:

  <?xml version="1.0" encoding="UTF-8"?>

  <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">

  <description>MySQL Test App</description>
  <resource-ref>
  <description>DB Connection</description>
  <res-ref-name>jdbc/TestDB</res-ref-name>
  <res-type>javax.sql.DataSource</res-type>
  <res-auth>Container</res-auth>
  </resource-ref>
  </web-app>

   7. F9運行應用,myWeb目錄中將會生成Tomcat子目錄,其中包含了conf子目錄,

  在Tomcat_HOMEconfCatalinalocalhost目錄中生成了DBTest.xml文件

  8. 將myWebTomcatconf目錄中的文件server8080.xml加入工程文件,修改server8080.xml的內容

  server8080.xml:


  <?xml version="1.0" encoding="UTF-8"?>
  <Server debug="0" port="8081" shutdown="SHUTDOWN">
  <Service name="Catalina">
  <Connector acceptCount="10" connectionTimeout="60000" debug="0" maxThreads="75" minSpareThreads="5" port="8080"/>
  <Engine debug="0" defaultHost="localhost" name="Catalina">
  <Host appBase="C:myWebTomcatwebapps" autoDeploy="false" debug="0" deployXML="false" name="localhost" unpackWARs="false">

  <Context path="/DBTest" docBase="C:myWebDBTest" debug="5" reloadable="true" crossContext="true" workDir="C:myWebTomcatworkDBTest">

  <Logger className="org.apache.catalina.logger.FileLogger" prefix="localhost_DBTest_log." suffix=".txt" timestamp="true"/>

  <Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource"/>

  <ResourceParams name="jdbc/TestDB">
  <parameter>
  <name>factory</name>
  <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
  </parameter>
  <!--
  Maximum number of dB connections in pool. Make sure you
  configure your mysqld max_connections large enough to handle
  all of your db connections. Set to 0 for no limit.
  -->
  <parameter>
  <name>maxActive</name>
  <value>100</value>
  </parameter>
  <!--
  Maximum number of idle dB connections to retain in pool.
  Set to 0 for no limit.
  -->
  <parameter>
  <name>maxIdle</name>
  <value>30</value>
  </parameter>
  <!--
  Maximum time to wait for a dB connection to become available
  in ms, in this example 10 seconds. An Exception is thrown if
  this timeout is exceeded. Set to -1 to wait indefinitely.
  -->
  <parameter>
  <name>maxWait</name>
  <value>10000</value>
  </parameter>
  <!-- MySQL dB username and password for dB connections -->
  <parameter>
  <name>username</name>
  <value>sa</value>
  </parameter>
  <parameter>
  <name>password</name>
  <value>topcomputer</value>
  </parameter>
  <!-- Class name for mm.mysql JDBC driver -->
  <parameter>
  <name>driverClassName</name>
  <value>com.microsoft.jdbc.sqlserver.SQLServerDriver</value>
  </parameter>
  <!--
  The JDBC connection url for connecting to your MySQL dB.
  The autoReconnect=true argument to the url makes sure that the
  mm.mysql JDBC Driver will automatically reconnect if mysqld closed the
  connection. mysqld by default closes idle connections after 8 hours.
  -->
  <parameter>
  <name>url</name>
  <value>jdbc:microsoft:sqlserver://nt04:1433;DatabaseName=test</value>
  </parameter>
  </ResourceParams>
  </Context>
  </Host>
  </Engine>
  </Service>
  </Server>


  9. 將JDBC驅動放在C:BorlandJBuilder2005 hirdpartyjakarta-tomcat-5.0.27commonlib目錄中

  10. 在SQL Server中建立數據庫test,數據庫表文件testdata

  creatTable.sql:


  if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[testdata]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
  drop table [dbo].[testdata]
  GO

  CREATE TABLE [dbo].[testdata] (
  [id] [int] NOT NULL ,
  [foo] [varchar] (50) COLLATE Chinese_Taiwan_Stroke_CI_AS NULL ,
  [bar] [int] NOT NULL
  ) ON [PRIMARY]

  GO

  輸入幾條記錄作為測試數據。

  11. F9
   12. 在c:myWebmulu中建立批處理文件startup.bat和shutdown.bat內容分別如下:

  startup.bat:

  C:BorlandJBuilder2005jdk1.4injavaw -classpath "C:BorlandJBuilder2005 hirdpartyjakarta-tomcat-5.0.27inootstrap.jar;C:BorlandJBuilder2005jdk1.4lib ools.jar" "-Dcatalina.home=C:/Borland/JBuilder2005/thirdparty/jakarta-tomcat-5.0.27" org.apache.catalina.startup.Bootstrap -config "C:myWebTomcatconfserver8080.xml" start

  Shutdown.bat:

  C:BorlandJBuilder2005jdk1.4injavaw -classpath "C:BorlandJBuilder2005 hirdpartyjakarta-tomcat-5.0.27inootstrap.jar;C:BorlandJBuilder2005jdk1.4lib ools.jar" "-Dcatalina.home=C:/Borland/JBuilder2005/thirdparty/jakarta-tomcat-5.0.27" org.apache.catalina.startup.Bootstrap -config "C:myWebTomcatconfserver8080.xml" stop

  13. 運行startup.bat,在浏覽器輸入http://localhost:8080/DBTest/test.jsp

  如何部署Web應用?

  1. 打包生成war文件

  2. 將DBTest.war拷貝到Tomcat_HOMEwebapps

  3. 在Tomcat_HOMEconfCatalinalocalhost目錄中建立文件DBTest.xml

  DBTest.xml

  <!--
  Context configuration file for the Tomcat Administration Web App
  $Id: admin.xml,v 1.2 2002/07/23 12:13:05 remm Exp $

  -->

  <Context path="/DBTest" docBase="/DBTest" debug="5" reloadable="true" crossContext="true" workDir="../work/DBTest">

  <Logger className="org.apache.catalina.logger.FileLogger" prefix="localhost_DBTest_log." suffix=".txt" timestamp="true"/>

  <Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource"/>
  <ResourceParams name="jdbc/TestDB">
  <parameter>
  <name>factory</name>
  <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
  </parameter>
  <!--
  Maximum number of dB connections in pool. Make sure you
  configure your mysqld max_connections large enough to handle
  all of your db connections. Set to 0 for no limit.
  -->
  <parameter>
  <name>maxActive</name>
  <value>100</value>
  </parameter>
  <!--
  Maximum number of idle dB connections to retain in pool.
  Set to 0 for no limit.
  -->
  <parameter>
  <name>maxIdle</name>
  <value>30</value>
  </parameter>
  <!--
  Maximum time to wait for a dB connection to become available
  in ms, in this example 10 seconds. An Exception is thrown if
  this timeout is exceeded. Set to -1 to wait indefinitely.
  -->
  <parameter>
  <name>maxWait</name>
  <value>10000</value>
  </parameter>
  <!-- MySQL dB username and password for dB connections -->
  <parameter>
  <name>username</name>
  <value>sa</value>
  </parameter>
  <parameter>
  <name>password</name>
  <value>topcomputer</value>
  </parameter>
  <!-- Class name for mm.mysql JDBC driver -->
  <parameter>
  <name>driverClassName</name>
  <value>com.microsoft.jdbc.sqlserver.SQLServerDriver</value>
  </parameter>
  <!--
  The JDBC connection url for connecting to your MySQL dB.
  The autoReconnect=true argument to the url makes sure that the
  mm.mysql JDBC Driver will automatically reconnect if mysqld closed the
  connection. mysqld by default closes idle connections after 8 hours.
  -->
  <parameter>
  <name>url</name>
  <value>jdbc:microsoft:sqlserver://nt04:1433;DatabaseName=test</value>
  </parameter>
  </ResourceParams>
  </Context>


  4. 啟動Tomcat,DBTest.war將會解壓到Tomcat_HOMEwebappsDBTest,並且在Tomcat_HOMEworkCatalinalocalhost目錄中生成DBTest目錄

  為什麼不能生成war文件?

  在proterties for Web Module對話框中設置與Build有關的屬性Build Web archive。

  如何在Web應用中加入目錄和文件?

  右擊Module directory,在彈出的菜單中選擇New-directory,輸入目錄名稱;或右擊擬在其中建立文件的目錄,在彈出的菜單中選擇New-File,選擇文件類型,輸入文件名。注意這樣加入的文件只能是指定的文件類型。這樣加入的目錄和文件都會打包到war文件中。

  如何加入其它類型的文件?

  可以將文件拷貝到指定的目錄,在proterties for Web Module對話框中設置屬性Content,選擇include all classes and resources,這樣也可以將加入的文件打包到war文件中。

  如何使用指定的JDK?

  選擇菜單Tools-Configure-JDKs,在彈出的對話框中按New按鈕,然後選擇JDK的路徑。

  選擇菜單Project-Project Properties,在彈出的對話框中選擇加入的JDK。

  如何使用指定的Tomcat?

  選擇菜單Enterprise-Configure Servers,在彈出的對話框中選擇Tomcat5.0後按Copy按鈕,

  選擇Copy產生的服務器Copy of Tomcat 5.0,選擇Home Directory

  選擇菜單Project-Project Properties,在彈出的對話框中設置屬性server,選擇加入的Tomcat服務器
  1. 上一頁:
  2. 下一頁:
Copyright © 程式師世界 All Rights Reserved