WAS6.1JNDI数据源配置测试代码
WAS课实验选学参考例子（需要配合前面配置好的jdbc/Test数据源使用）
前面数据源的配置文档下载：http://www.docin.com/p-1093004452.html
文章用到的jar包下载：http://download.csdn.net/detail/gsls200808/8513087
一、例子原文参考
(选学参考代码)
package com.myexample.util;
import java.sql.Connection;
import java.sql.SQLException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
public class BaseUtil {
public static Connection getConn() {
Connection con = null;
Context ctx;
try {
ctx = new InitialContext();
DataSource ds;
ds = (DataSource) ctx.lookup("java:comp/env/jdbc/Test");
if (ds == null) {
System.out.println("数据源不正确");
} else {
try {
con = ds.getConnection();
} catch (SQLException e) {
e.printStackTrace();
}
}
} catch (NamingException e) {
e.printStackTrace();
}
return con;
}
}
jdbc/Test
javax.sql.DataSource
Container
jdbc/Test
jdbc/Test
也可以直接在程序中使用lookup(“jdbc/Test”),但这样程序的移植以后,如果JNDI命名冲突,将需要直接更改代码;上面的第一个方法可以通过直接更改相应的资源配置xml来解决命名冲突的问题.
上面选学的这个实验老师没在Websphere6.1上做成功。经过一番查找后发现StackOverFlow上很多Websphere的资源配置文件是写在WEB-INF/ibm-web-bnd.xml下面的，内容也不一样。
二、修改版本一
下面的例子在Websphere6.1测试通过，但仍有瑕疵。
WEB-INF/web.xml
index.jsp
jdbc/Test
javax.sql.DataSource
Container
Shareable
<%@page import="java.sql.Connection"%>
<%@page import="javax.sql.DataSource"%>
<%@page import="javax.naming.InitialContext"%>
<%@page import="javax.naming.Context"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
JNDI测试
======================
<%
Connection conn = null;
Context initCtx = null;
initCtx = new InitialContext();
DataSource ds = (DataSource) initCtx
.lookup("java:comp/env/jdbc/Test");
if (ds != null) {
out.print("数据源获取成功!
");
conn = ds.getConnection();
} else {
out.print("数据源获取失败
");
}
if (conn != null) {
out.print("数据库连接获取成功
");
} else {
out.print("数据库连接获取失败
");
}
%>
部署之后会有五项，多出的是一个映射选项，选无并把前面的TestApp选上就可以了。
三、修改版本二
2015年3月9日更新：上面的代码其实是有瑕疵的：获得的连接可能是不能用的，还有一个问题配置jndi数据源的文件在WAS6.1应该是ibm-web-bnd.xmi，其他版本可能有变化。
下面给出更改的几项内容：
删除ibm-web-bnd.xml，新建WEB-INF/ibm-web-bnd.xmi，内容如下：
更改web.xml如下
index.jsp
datasource
jdbc/Test
javax.sql.DataSource
Container
Shareable
新建dbtest.jsp
<%@page import="java.sql.SQLException"%>
<%@page import="javax.naming.NamingException"%>
<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.Statement"%>
<%@page import="java.sql.Connection"%>
<%@page import="javax.sql.DataSource"%>
<%@page import="javax.naming.Context"%>
<%@page import="javax.naming.InitialContext"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
Insert title here
<%
try {
//初始化StringBuffer对象
StringBuffer buffer = new StringBuffer();
//JNDI获取数据源
Context initcontext = new InitialContext();
Context context = (Context) initcontext.lookup("java:comp/env");
DataSource datasource = (DataSource) context
.lookup("jdbc/Test");
Connection cn = datasource.getConnection();
//数据库操作
Statement st = cn.createStatement();
String sql = "select * from Categories";
//String key = "";
//if (key != null)
//sql = sql + " where CategoryName like '%" + key + "%'";
ResultSet rs = st.executeQuery(sql);
//将结果写入StringBuffer对象
buffer.append("");
buffer.append("" + "类别ID");
buffer.append(" " + "分类名称");
buffer.append(" " + "类别描述");
buffer.append(" ");
while (rs.next()) {
buffer.append("");
buffer.append("" + rs.getInt(1) + " ");
buffer.append("" + rs.getString(2) + " ");
buffer.append("" + rs.getString(3) + " ");
buffer.append(" ");
}
buffer.append("
");
//输出
out.write(buffer.toString());
rs.close();
st.close();
cn.close();
} catch (NamingException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
%>
至此代码没什么问题了，但是在WAS上运行却获取不到内容，查看日志文件SystemErr.log(目录在C:\Program Files\IBM\WebSphere\AppServer\profiles\Profile1\logs\server1)，出现如下错误：
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R java.sql.SQLException: [IBM][SQLServer JDBC Driver]This driver is locked for use with embedded applications.
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.websphere.jdbc.base.BaseExceptions.createException(Unknown Source)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.websphere.jdbc.base.BaseExceptions.getException(Unknown Source)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.websphere.jdbc.base.BaseConnection.createStatement(Unknown Source)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.websphere.jdbcx.base.BasePooledConnection.createStatement(Unknown Source)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.websphere.jdbcx.base.BaseConnectionWrapper.createStatement(Unknown Source)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.rsadapter.jdbc.WSJdbcConnection.createStatement(WSJdbcConnection.java:1194)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.rsadapter.jdbc.WSJdbcConnection.createStatement(WSJdbcConnection.java:1172)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm._jsp._dbtest._jspService(_dbtest.java:95)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:85)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:966)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:463)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:115)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:168)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionProcessor.handleRequest(AbstractJSPExtensionProcessor.java:270)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3107)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:238)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:811)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1425)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:92)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:465)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:394)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:102)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:152)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:213)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.io.async.AbstractAsyncFuture.fireCompletionActions(AbstractAsyncFuture.java:195)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:193)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:766)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:847)
[15-3-9 18:15:43:651 CST] 0000002b SystemErr R at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1498)
问题出在base.jar(目录在C:\Program Files\IBM\WebSphere\AppServer\lib)驱动不能用，被锁住了，需要licence才能解锁。下面是某位大神的解锁方法
把base.jar复制到E盘根目录下
然后执行以下java代码(需要导入javassist这个jar包，笔者是从struts2开发包例程解压拷过来的javassist-3.11.0.GA.jar)：
package com.example;
import java.io.IOException;
import javassist.CannotCompileException;
import javassist.ClassPool;
import javassist.CtClass;
import javassist.CtMethod;
import javassist.NotFoundException;
import javassist.expr.ExprEditor;
import javassist.expr.MethodCall;
public class test {
public static void main(String[] args) {
ClassPool pool = ClassPool.getDefault();
try {
pool.insertClassPath("E:\\base.jar");
CtClass cc = pool.get("com.ibm.websphere.jdbc.base.BaseConnection");
CtMethod m = cc.getDeclaredMethod("open");
m.instrument(new ExprEditor() {
@Override
public void edit(MethodCall m) throws CannotCompileException {
if (m.getClassName().equals(
"com.ibm.websphere.jdbc.base.BaseLicenseUtility")
&& m.getMethodName().equals("isLocked")) {
m.replace("$_=false;");
System.out.println("find\n");
}
;
}
});
cc.writeFile("E:\\aaa");
} catch (NotFoundException e) {
e.printStackTrace();
} catch (CannotCompileException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("end\n");
}
}程序运行之后会在E盘aaa目录输出带包的class文件。
然后对base.jar解压，替换class，然后重新打包成jar(建议用winrar打包成zip然后改后缀名)，最后替换掉原始的base.jar就可以了。
已经打包好的base.jar包下载：http://download.csdn.net/detail/gsls200808/8513087
到这里才算真正结束！！！
================================分割线===============================================
四、可能遇到的问题
下面谈谈笔者遇到的问题：
1.交叉引用(SystemOut.log)
[15-3-9 14:54:52:635 CST] 00000038 ArchiveDeploy W ADMA0091E: 为模块 firstapp.war 在 URI WEB-INF/ibm-web-bnd.xmi 中定义的资源 WEB-INF/ibm-web-bnd.xmi 是无效的。此资源具有无法解析的交叉引用 org.eclipse.jst.j2ee.webapplication.internal.impl.WebAppImpl@13be13be (eProxyURI: WEB-INF/web.xml#WebApp_1237946146690)。
[15-3-9 14:54:57:088 CST] 00000038 ArchiveDeploy W ADMA0091E: 为模块 firstapp.war 在 URI WEB-INF/ibm-web-bnd.xmi 中定义的资源 WEB-INF/ibm-web-bnd.xmi 是无效的。此资源具有无法解析的交叉引用 org.eclipse.jst.j2ee.webapplication.internal.impl.WebAppImpl@12bc12bc (eProxyURI: WEB-INF/web.xml#WebApp_1237946146690)。2.空指针异常(SystemErr.log)
[15-3-9 18:13:36:620 CST] 0000002c SystemErr R java.lang.NullPointerException配置文件xml或xmi没写好
3.总结一句，控制台测试成功但代码运行不正常不一定是代码结构问题，还有可能是licence的问题update2018-3-8：补充一下javassist改的内容，改了BaseConnection的open方法，将BaseLicenseUtility.isLocked(this)这一句替换成了false，这么说可能不直观，看一个jd-gui反编译后的对比图
update2018-3-8：base.jar替换的代码https://gitee.com/gsls200808/CrackBaseJar