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POJava bean with JNI?
 

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    <p>I have added native method in java bean code.</p> <p>Then i have copied .dll file in System32 folder.</p> <p>while using javabean in JSP.</p> <p>it gives an Error:</p> <p>HTTP Status 500 -</p> <p>type Exception report</p> <p>message</p> <p>description The server encountered an internal error () that prevented it from fulfilling this request.</p> <p>exception</p> <pre><code>org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.UnsatisfiedLinkError: BeanDir.mysimplebean.sayHello()Ljava/lang/String; org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) </code></pre> <p>root cause</p> <pre><code>javax.servlet.ServletException: java.lang.UnsatisfiedLinkError: BeanDir.mysimplebean.sayHello()Ljava/lang/String; org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:862) org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791) org.apache.jsp.jsp.callbean_jsp._jspService(callbean_jsp.java:124) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) </code></pre> <p>root cause</p> <pre><code>java.lang.UnsatisfiedLinkError: BeanDir.mysimplebean.sayHello()Ljava/lang/String; BeanDir.mysimplebean.sayHello(Native Method) org.apache.jsp.jsp.callbean_jsp._jspService(callbean_jsp.java:112) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) </code></pre> <p>note The full stack trace of the root cause is available in the Apache Tomcat/6.0.20 logs. Apache Tomcat/6.0.20</p> <p>Java bean code:</p> <pre><code>package BeanDir; import java.util.*; //This file must be compiled Manually using javac //cd D:\tomcat\webapps\examples\WEB-INF\classes\BeanDir\mysimplebean.java public class mysimplebean { static { String s=System.getProperty("java.library.path"); System.setProperty("java.library.path",s); System.loadLibrary("HelloWorld"); } public String getceoname() { String ceonameval = "Tom Hanks CEO of Tom Hanks INC"; return ceonameval; } public String ceoemail() { String ceoemailval = "tom@tomhanksinc.com"; return ceoemailval; } public double findtakehome(int salary,String designation) { double takehomeamt; if(designation=="Developer") { takehomeamt = salary+salary*0.15; //15 % Raise in Salary } else { takehomeamt = salary+salary*0.10; //10 % Raise in Salary } return takehomeamt; } public native String sayHello(); } </code></pre>
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