📄 initprint.java

📁 一个完整的

💻 JAVA

字号:

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import explato.database.*;

public class InitPrint extends HttpServlet {

   public void service( HttpServletRequest req, HttpServletResponse res ) {
      PrintWriter out = null;
      try {
        res.setContentType( "text/html" );
	    out = res.getWriter();
		   //......
		   
		ConnectionManager cm = new ConnectionManager();
		//File f1=new File("db.properties");
		
		ServletContext application = getServletContext();
		
		String sPath=application.getRealPath("db.properties");
		String sPath1=application.getRealPath("db.log");
		
		cm.setDBProp( sPath );              //设置数据库连接配置文件
		cm.setLogFile( sPath1 );                    //设置日志文件
		cm.setTrace( true );                                    //是否需要记录日志


		application.setAttribute( "fcConPoolManager", cm );     //application是javax.servlet.ServletContext对象，也就是JSP中的application对象，此对象在整个WEB应用中是唯一的
	      //......
		//启动Session
		HttpSession session = req.getSession(true);
		session.setAttribute("graphdata", "");
		//

	    out.println( "<html><body>" );
	    out.println( "" );
	    out.println( "init webprint Ok!</body></html>" );
      }
      catch( Exception e ) {
      	out.println( "init not success!</body></html>" );
      	e.printStackTrace( out );
      }
   }

	//destroy()方法会在服务器正常关闭时执行
	public void destroy() {
      try {
	      ServletContext application = getServletContext();
			ConnectionManager cm = (ConnectionManager)application.getAttribute( "fcConPoolManager" );
			cm.release();    //关闭所有连接，撤销驱动程序注册
      }catch( Exception e ) {}
      super.destroy();
   }

}

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