First, the introduction of JSP development, the general need for front-end development tools and background services. WebLogic is a large system that integrates tools and services. It is important to take into consideration that the BEA company's WebLogic minimum requirements to configure memory 512M, even if the server parameter file optimization, still can not solve the problem.
Second, install the configuration WebLogic
Windows installation nothing to say.
After installation, WebLogic automatically built three servers (workshop,integration,portal), users can choose, not happy can also create their own, the content of the creation of "WebLogic Domain configuration Method" A article has been very detailed. The simple approach is to choose from the template selection, where the tool->weblogic the basic WebLogic workshop domain template of the Server-> Configuration Wizard.
Third, create a new application, add a Web project,
Domain server created well, select File-> new-> application, select service, select Application, complete creation. Add a Web project to the application you are building.
Four, Web application
Add a database Web application. In the Web project, add the JSP file and Java Class. This example uses index.jsp,error.jsp, clsdb.java,db.properties four files.
The directory structure is as follows:
Application name \web project name \web-inf\ ...
Application name \web project name \index.jsp
Application name \web project name \error.jsp
Application name \web project name \db.properties
Application name \web project name \javacls\clsdb.java
index.jsp Start page, data browsing
--------------------------------------------------
<body>
<%
Javacls.clsdb db=new Javacls.clsdb ();
Boolean I;
I=db.openconnection ();
if (i=true)
{
Java.sql.ResultSet rs=db.exequery ("Select D from Test");
Rs.next ();
while (!rs.isafterlast ())
{
Out.println (Rs.getobject (1));
Rs.next ();
}
}
%>
</body>
Error.jsp Error Display page
--------------------------------------------------
<p>
An error occurred
<br>
Error Description:
<%=exception.tostring ()%>
<br>
Error Reason:
<%=exception.getmessage ()%>
</p>
Clsdb.java database operation class, very typical database application method
--------------------------------------------------
Package JavaBean;
public class Clsdb
{
Java.sql.Connection Cn=null;
Java.sql.Statement Sqlstm=null;
Java.sql.ResultSet Rs=null;
Public Clsdb ()
{}
Open a database connection
public boolean openconnection ()
{
Read settings
Java.util.Properties prop=new java.util.Properties ();
Try
{
Java.io.InputStream In=this.getclass (). getResourceAsStream (".. /db.properties ");
Prop.load (in);
if (in!=null) in.close ();
}
catch (Java.io.IOException e)
{
System.out.println ("[opencn] config file open error!") ");
return false;
}
String Jdbc=prop.getproperty ("Drivers");
String url=prop.getproperty ("url");
String user=prop.getproperty ("user");
String password=prop.getproperty ("password");
Load JDBC
Try
{
Class.forName (JDBC);
}
catch (Java.lang.ClassNotFoundException e)
{
System.out.println ("[OPENCN] load JDBC driver error!") ");
return false;
}
Open a database connection
Try
{
This.cn=java.sql.drivermanager.getconnection (Url,user,password);
}
catch (Exception e)
{
E.printstacktrace ();
return false;
}
return true;
}
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