Jerome Lepinski
How do I change the while loop in this code to the range with range list style display page (like search results on google) for a ResultSet() in jsp?
2 Answer(s)      4 years and 3 months ago
Posted in : JSP-Servlet
<%@ page language="java" import="java.sql.*" %>
<html>
<head>
<title>Display data from database in jsp</title>
</head>
<body>
<table border="0" width="75%" cellspacing="0" cellpadding="0">
<tr>
<td width="100%">
<h2><font color="#FF0033">Display data from database in jsp</font></h2>
<form method="POST" >
<table border="1" width="75%" cellspacing="0" cellpadding="0" bgcolor="#CCFFCC">

<%
Connection con = null;
String url = "jdbc:mysql://192.168.10.211:3306/";;
String db = "amar";
String driver = "com.mysql.jdbc.Driver";
int rows = 0;
try{
Class.forName(driver);
con = DriverManager.getConnection(url+db,"amar","amar123");
try{
Statement st = con.createStatement();
String query = "select * from user_Register";
ResultSet rs = st.executeQuery(query);

while (rs.next()) {
rows =rs.getInt(1);

%>
result set of unknown size

Display rows 1-10 range

Display links to
    first (after first range)
    previous (after first range)
    11-20
    21-30
    next (when applicable)
    last (when not on last range)

refreshes automatically like an eBay or Google search page. 
<%}

out.println("Total row is = "+rows);
rs.close();
con.close();

}
catch (SQLException ex){
System.out.println("SQL statement is not executed!");
}
}
catch (Exception e){
e.printStackTrace();
}
%>
</tr>
</table>
</form>
</td>
</tr>
</table>
</body>
</html>

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View Answers

June 12, 2012 at 11:18 AM


The given jsp code retrieves the record from the database and display 10 records per page. Here is the code: pagination.jsp

<%@ page language="java" %>
<%@ page import="java.sql.*" %>
<%!
public int nullIntconvert(String str){
int num=0;
if(str==null) {
str="0";
}
else if((str.trim()).equals("null")) {
str="0";
}
else if(str.equals("")) {
str="0";
}
try{
num=Integer.parseInt(str);
}
catch(Exception e) { }
return num;
}
%>
<%
Connection conn = null;
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root", "root");
ResultSet rs1 = null;
ResultSet rs2 = null;
PreparedStatement ps1=null;
PreparedStatement ps2=null;

int showRows=10;
int totalRecords=10;
int totalRows=nullIntconvert(request.getParameter("totalRows"));
int totalPages=nullIntconvert(request.getParameter("totalPages"));
int iPageNo=nullIntconvert(request.getParameter("iPageNo"));
int cPageNo=nullIntconvert(request.getParameter("cPageNo"));

int startResult=0;
int endResult=0;
if(iPageNo==0) {
iPageNo=0;
}
else{
iPageNo=Math.abs((iPageNo-1)*showRows);
}
String query1="SELECT SQL_CALC_FOUND_ROWS * FROM student limit "+iPageNo+","+showRows+"";
ps1=conn.prepareStatement(query1);
rs1=ps1.executeQuery();

String query2="SELECT FOUND_ROWS() as cnt";
ps2=conn.prepareStatement(query2);
rs2=ps2.executeQuery();
if(rs2.next()) {
totalRows=rs2.getInt("cnt");
}
%>
<html>
<h3>Pagination of JSP page</h3>
<body>
<form>
<input type="hidden" name="iPageNo" value="<%=iPageNo%>">
<input type="hidden" name="cPageNo" value="<%=cPageNo%>">
<input type="hidden" name="showRows" value="<%=showRows%>">
<table width="100%" cellpadding="0" cellspacing="0" border="1" >
<tr>
<td>Roll No</td>
<td>Name</td>
<td>Marks</td>
<td>Grade</td>
</tr>
<%
while(rs1.next()) {
%>
<tr>
<td><%=rs1.getInt("rollNo")%></td>
<td><%=rs1.getString("name")%></td>
<td><%=rs1.getInt("marks")%></td>
<td><%=rs1.getString("grade")%></td>
</tr>
<%
}
%>
<%
try{
if(totalRows<(iPageNo+showRows)) {
endResult=totalRows;
}
else{
endResult=(iPageNo+showRows);
}
startResult=(iPageNo+1);
totalPages=((int)(Math.ceil((double)totalRows/showRows)));
}
catch(Exception e){
e.printStackTrace();
}
%>


June 12, 2012 at 11:19 AM


continue..

<tr>
    <td colspan="3">
    <div>
    <%
    int i=0;
    int cPage=0;
    if(totalRows!=0) {
    cPage=((int)(Math.ceil((double)endResult/(totalRecords*showRows))));

    int prePageNo=(cPage*totalRecords)-((totalRecords-1)+totalRecords);
    if((cPage*totalRecords)-(totalRecords)>0){
    %>
    <a href="pagination.jsp?iPageNo=<%=prePageNo%>&cPageNo=<%=prePageNo%>"> << Previous</a>
    <%
    }
    for(i=((cPage*totalRecords)-(totalRecords-1));i<=(cPage*totalRecords);i++){
    if(i==((iPageNo/showRows)+1)){%>
    <a href="pagination.jsp?iPageNo=<%=i%>" style="cursor:pointer;color: red"><b><%=i%></b></a>
    <%
    }
    else if(i<=totalPages){
    %>
    <a href="pagination.jsp?iPageNo=<%=i%>"><%=i%></a>
    <%
    }
    }
    if(totalPages>totalRecords && i<totalPages){
    %>
    <a href="pagination.jsp?iPageNo=<%=i%>&cPageNo=<%=i%>"> >> Next</a>
    <%
    }
    }
    %>
    <b>Rows <%=startResult%> - <%=endResult%> Total Rows <%=totalRows%> </b>
    </div>
    </td>
    </tr>
    </table>
    </form>
    </body>
    </html>

In the above code,we have taken the database table student(rollNo,name,marks,grade).

For more information, visit the following link:

http://www.roseindia.net/jsp/paging.shtml










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