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JSP + JAVABEAN two-layer model development (implementation of the news center module)

Source: Internet
Author: User
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1. conn. java

Package news;
Import java. SQL .*;

Public class conn {


String sDBDriver = "org. gjt. mm. mysql. Driver ";
String sConnStr = "jdbc: mysql: // localhost/test ";
Connection connect = null;
ResultSet rs = null;

Public conn ()
{

Try {Class. forName (sDBDriver );

} Catch (Exception e) {e. printStackTrace ();}

}


Public ResultSet executeQuery (String SQL ){

Try {
Connect = DriverManager. getConnection (sConnStr, "test_root", "test_root ");
Statement stmt = connect. createStatement ();
Rs1_stmt.exe cuteQuery (SQL );
} Catch (SQLException ex) {System. err. println (ex. getMessage ());}
Return rs;
}

Public int executeUpdate (String SQL ){
Int result = 0;
Try {
Connect = DriverManager. getConnection (sConnStr, "test_root", "test_root ");
Statement stmt = connect. createStatement ();
Result1_stmt.exe cuteUpdate (SQL );

} Catch (SQLException ex) {System. err. println (ex. getMessage ());}
Return result;


}

Public void close (){
If (connect! = Null ){
Try {
Connect. close ();
Connect = null;
}
Catch (SQLException ex ){
System. err. println (ex. getMessage ());}
}

}


}

2. mianNew. jsp

<% @ Page language = "java" contentType = "text/html; charset = gb2312" pageEncoding = "UTF-8" %>
<! DOCTYPE html PUBLIC "-// W3C // dtd html 4.01 Transitional // EN" "http://www.w3.org/TR/html4/loose.dtd">
<% @ Page import = "java. SQL. *" %>
<Jsp: useBean id = "conn" scope = "page" class = "news. conn"/>

<Html>
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312">
<Title> news MAIN </title>
</Head>
<Body>

<Table border = "0" cellpadding = "0" cellspacing = "0" style = "border-collapse: collapse"
Bordercolor = "#111111" width = "100%" id = "AutoNumber1">
<Tr>

& Lt; td width = "100%" & gt;

</Td>
</Tr>
<Tr>

& Lt; td width = "100%" & gt;

</Td>
</Tr>

</Table>

<Table border = "0" cellpadding = "0" cellspacing = "0" style = "border-collapse: collapse"
Bordercolor = "#111111" width = "100%" id = "AutoNumber2">
<Tr>

<Td width = "13%"> </td>
<Td width = "87">
<p>
<%
ResultSet rs, rsNest;
String strSql = null;
StrSql = "select * from news where type = 1 order by time desc ";
Rsw.conn.exe cuteQuery (strSql );

While (rs. next ()){
%>
<Span class = "s"> & nbsp;
<A href = "newsContent. jsp? NewsId = <% = rs. getInt ("id") %> "> <% = rs. getString (" Title ") %> </a> <br>
<%
}
%>
<P>
</p>

<%
StrSql = "select * from news where type = 2 order by time desc ";
Rsw.conn.exe cuteQuery (strSql );

While (rs. next ()){
%>
<Span class = "s"> & nbsp;
<A href = "newsContent. jsp? NewsId = <% = rs. getInt ("id") %> "> <% = rs. getString (" Title ") %> </a> <br>
<%
}
%>
<P>
</Td>
</Tr>
</Table>
<P align = "center"> copyright </p>
<P align = "center"> </p>
 

</Body>
</Html>

3. newsContent. jsp

<% @ Page language = "java" contentType = "text/html; charset = gb2312"
PageEncoding = "UTF-8" %>
<! DOCTYPE html PUBLIC "-// W3C // dtd html 4.01 Transitional // EN" "http://www.w3.org/TR/html4/loose.dtd">
<% @ Page import = "java. SQL. *" %>
<Jsp: useBean id = "conn" scope = "page" class = "news. conn"/>
<Html>
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312">
<Title> newsContent </title>
</Head>
<Body>

<Table border = "0" cellpadding = "0" cellspacing = "0" style = "border-collapse: collapse"
Bordercolor = "#111111" width = "100%" id = "autonumber1">
<Tr>

& Lt; TD width = "100%" & gt;

</TD>
</Tr>
<Tr>

& Lt; TD width = "100%" & gt;

</TD>
</Tr>

</Table>

<Table border = "0" cellpadding = "0" cellspacing = "0" style = "border-collapse: collapse"
Bordercolor = "#111111" width = "100%" id = "autonumber2">
<Tr>

<TD width = "13%"> </TD>
<TD width = "87">

<Div class = "title" align = "center" style = "width: 603; Height: 36">
<%
String id = "";
String keyword = "";
String rplContent = "";
ResultSet rs, rsNest;
String strSql = null;
Id = request. getParameter ("newsId ");
StrSql = "select * from news where id =" + id;
Rsw.conn.exe cuteQuery (strSql );

If (rs. next ()){
Keyword = rs. getString ("keyword ");

%>
<% = Rs. getString ("Title") %>
</Div>

<%
RplContent = rs. getString ("content"). replaceAll ("/n", "<br>"); // handle the line feed issue
%>

<Hr align = "center" width = "490" noShade SIZE = "1">
<P> <br>
& Nbsp; <span style = "font-size: 9pt" ><%= rplContent %>
<P> </td> </tr>
<Tr>
<Td width = "13%"> </td>
& Lt; td width = "87%" & gt;
<Span style = "font-size: 9pt"> News: </span> <p> <span class = "s">

<%
StrSql = "select * from news where id <>" + id + "and title like '%" + keyword + "% 'order by time desc ";
Rsw.conn.exe cuteQuery (strSql );

While (rs. next ()){
%>

<A href = "newsContent. jsp? NewsId = <% = rs. getInt ("id") %> "> <% = rs. getString ("Title") %> </a> <% = rs. getDate ("time") %> <br>

<%
}
}

%>
</Span>
</Td>
</Tr>
</Table>
<P align = "center"> copyright </p>
<P align = "center"> </p>
</Body>
</Html>

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