org.apache.xalan.processor.transformerfactoryImpl not found问题
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org.apache.xalan.processor.transformerfactoryImpl not found问题
这个例子来自夏昕的《Spring开发指南》,虽然给出了详细的代码,可能是因为开发环境的差异却频频抛出异常。其中最重要的异常就是apache.xalan.processor.transformerfactoryImpl not found。经过一番奋战终于解决了这个问题。
1、开发环境
JDK1.5、Tomcat 5.0.30、MyEclipse_55.1GA_E_FullStackInstaller。
2、index.jsp
<%...@ taglib prefix="ww" uri="webwork"%>
<html>
<body>
<form action="login.action">
<p align="center">
登录<br>
<ww:if test="errorMessage != null">
<font color="red">
<ww:property value="errorMessage"/>
</font>
</ww:if>
</p>
用户名:
<input type="text" name="model.username" />
<br>
密 码 :
<input type="password" name="model.password" />
<br>
<p align="center">
<input type="submit" value="提交" name="B1"/>
<input type="reset" value="重置" name="B2"/>
</p>
</form>
</body>
</html>
3、main.jsp
<html>
<body>
<p align="center">Login Success!</p>
<p align="center">Welcome!
<ww:property value="#session['username']"/>
</p>
<p align="center">
<b>Messages:</b><br>
<ww:iterator value="messages" status="index">
<ww:if test="#index.odd==true">
!<ww:property/><br>
</ww:if>
<ww:else>
*<ww:property/><br>
</ww:else>
</ww:iterator>
</p>
</body>
</html>
4、web.xml
<web-app version="2.4"
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">
<servlet>
<servlet-name>webwork</servlet-name>
<servlet-class>com.opensymphony.webwork.dispatcher.ServletDispatcher</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>webwork</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>velocity</servlet-name>
<servlet-class>com.opensymphony.webwork.views.velocity.WebWorkVelocityServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>velocity</servlet-name>
<url-pattern>*.vm</url-pattern>
</servlet-mapping> <welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
5、xwork.xml
<!DOCTYPE xwork PUBLIC "-//OpenSymphony Group//XWork 1.0//EN" "xwork-1.0.dtd" >
<xwork>
<include file="webwork-default.xml"></include>
<package name="default" extends="webwork-default">
<action name="login" class="com.spring.LoginAction">
<result name="success" type="dispatcher">
<param name="location">/main.jsp</param>
</result>
<result name="loginfail" type="dispatcher">
<param name="location">/index.jsp</param>
</result>
<interceptor-ref name="params"></interceptor-ref>
<interceptor-ref name="model-driven"></interceptor-ref>
</action>
</package>
</xwork>
6、LoginAction.java和LoginInfo.java
private final static String LOGIN_FAIL = "loginfail";
LoginInfo loginInfo = new LoginInfo();
public Object getModel() ...{
return loginInfo;
}
public String execute() throws Exception ...{
if("mypass".equals(loginInfo.getPassword())&&"erica".equalsIgnoreCase(loginInfo.getUsername()))...{
ActionContext ctx = ActionContext.getContext();
Map session = ctx.getSession();
session.put("username", loginInfo.getUsername());
loginInfo.getMessages().add("message1");
loginInfo.getMessages().add("message2");
loginInfo.getMessages().add("message3");
return SUCCESS;
}else...{
loginInfo.setErrorMessage("Username/Password Error!");
return LOGIN_FAIL;
}
}
}
public class LoginInfo ...{
private String password;
private String username;
private List messages = new ArrayList();
private String errorMessage;
...
}
7、webwork.properties
如果不加上这个文件,在偶的环境中就会报找不到该文件的异常,因此我就到webwork的jar包里找到default.properties,改一下名字就可以了。
8、目录结构
|__src
| |_com.spring
| |_LoginAction.java
| |_LoginInfo.java
|_WebRoot
|_META-INF
|_WEB-INF
| |_lib
| |_classes
| | |_webwork.properties
| | |_xwork.xml
| | |_com.spring
| | |_LoginAction.class和LoginInfo.class
| |_web.xml
|_index.jsp
|_main.jsp
9、测试
按照上面的步骤,运行会报org.apache.xalan.processor.transformerfactoryImpl not found的异常,从网上下载xalan-j_2_7_0-bin-2jars包,把包内的几个jar文件都拷贝到项目的lib中,实际上还要把其中的xml-apis.jar和xercesImpl.jar覆盖掉Tomcat安装目录下的common/endorsed下的两个文件。之所以要覆盖掉是因为Tomcat的版本太低的缘故。
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