JSP, a technology launched by Sun Microsystems in June 1999, is a web-based development technology based on Javaservlet and the entire Java system that enables the creation of advanced, secure, and Cross-platform Dynamic Web sites.
JSP is very similar to ASP. Both provide the ability to mix some kind of program code in HTML code, and the language engine to interpret the execution code. In an ASP or JSP environment, HTML code is primarily responsible for describing the display style of information, while program code is used to describe the processing logic. The programming language under ASP is a scripting language such as VBScript, and the JSP uses Java.
TRS and its JavaBeans
TRS system is the first Chinese Full-text retrieval system with "parallel Computing" algorithm, its Full-text search engine can provide the performance of relational database, and can be used in conjunction with relational database, because TRS can establish full-text indexing for text content and provide efficient full-text retrieval capabilities. So using TRS can greatly improve the query speed of the website.
TRS JavaBeans is developed based on Java component Technology--javabeans with good cross-platform features. This article describes the process of building a Web using JSP, TRS, and JavaBeans.
TRS JavaBeans Configuration steps
Take NT Lower WebLogic5.1.0 as an example to explain.
1. Install WebLogic5.1.0
2. Modify Startweblogic.cmd
Change "Set pre_classpath=" to "full path% of full path%;%trsdemo.jar of Set Pre_classpath=%trsbean.jar".
For example, if Trsbean.jar is located in the C:\TRSJavaBeans\lib\ directory, change the statement to:
Set Pre_classpath=c:\trsjavabeans\lib\trsbean.jar
3. Modify Weblogic.properties
Take the statement: #weblogic. Httpd.register.servlets=weblogic.servlet.servletservlet before the # number removed.
Remove the "#" number before the following statement:
# weblogic.httpd.register.*.jsp=\
# Weblogic.servlet.JSPServlet
#weblogic. httpd.initargs.*.jsp=\
# pagecheckseconds=1,\
# compilecommand=c:/java/bin/javac.exe,\
# workingdir=d:/weblogic/myserver/classfiles,\
# Verbose=true
Then change "compilecommand=c:/java/bin/javac.exe,\" to "Compilecommand=java_ path/bin/javac.exe,\", where JAVA_ Path is the installation root directory of the actual JDK used.
4. Install Demo
Copy the demo directory of the Trsjavabeans installation package to the d:/weblogic/myserver/public_html directory.
Once the above configuration is complete, we can enter the design and development phase.
Development example
Set the database as: "News. Investment dynamics", with the field "title", "Content", "date", and "number" (unique field).
To show the details of a specific record as an example, as for the paging display, Full-text search and BBS, space limit, no longer repeat, interested users can try their own. The actual results can be obtained from the Www.exin.net Network (www.bjinvest.gov.cn) or the Beijing investment platform.
The JSP program is as follows:
<HTML>
<HEAD>
<TITLE> News </TITLE>
<link rel= "stylesheet" href= "Mycss.css" type= "Text/css" >
<meta content= "text/html; charset=gb2312 "http-equiv=content-type>
<%@ page import= "com.eprobiti.trs.*"%>
<%@ page import= "java.util.*"%>
<jsp:usebean id= "trsconn" scope = "session" class= "Com.eprobiti.TRS.TRSConnection"/>
<jsp:usebean id= "Trsrs" scope = "page" class= "Com.eprobiti.TRS.TRSResultSet"/>
</HEAD>
<BODY>
<%
String item_id = request.getparameter ("id");
The parameter ID is passed from the URL or from the form hidden field of the previous file.
String Dbname,ip,port,username,password;
dbname = "News Beijing Press";
TRS database name
ip= "202.123.166.99"; TRS Server IP
port= "8888";//trs Server port
Username= "Yourname";
You can retrieve the user name for news.
Password= "YourPassword";
The password for the user name
String Filter = "number =" +item_id;
Define search criteria
try {
if (Trsconn.connect (Ip,port,username,password)) {}
Establish a connection with the TRS server
else {
OUT.PRINTLN ("Connection Connection failed!) \ n ");
}
Trsrs = Trsconn.executeselect (Dbname,s1, "", "", NULL, 0, 0, false);
Perform a query operation to generate a recordset
}
catch (Trsexception trse) {
OUT.PRINTLN ("ResultSet Connection failed!) \ n ");
}
try {
Trsrs.movefirst ();
Record positioning
%>
<p>
<center>
<table width=80%>
<tr align=center>
<td><%=trsrs.getstring ("title")%>
</td>
</tr>
<tr align=center>
<td><%=trsrs.getstring ("date")%>
</td>
</tr>
<tr>
<td><%=trsrs.getstring ("content")%>
</td>
</tr>
</table>
</center>
<p>
<%
Trsrs.close ();
catch (Trsexception trse) {}
%>
</body>
