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请教一个关于JNDI的问题??

sun7bear

发贴: 16
积分: 0

于 2006-05-07 12:06

ContactBean.java:
package com.jspdev.page;

import java.util.*;
import com.jspdev.util.*;
import java.sql.*;

public class ContactBean {
private Connection conn;
Vector v;
public ContactBean() throws Exception {
11conn = DatabaseConn.getConnection();
v = new Vector();
}
public int getAvailableCount() throws Exception {
int ret = 0;
Statement stmt = conn.createStatement();
String strSql = "select count(*) as num from contact";
ResultSet rset = stmt.executeQuery(strSql);
while (rset.next()) {
ret = rset.getInt("num");
}
return ret;
}

public PageBean listData(String page) throws Exception {
try {
PageBean pageBean = new PageBean(this);
int pageNum = Integer.parseInt(page);
Statement stmt = conn.createStatement();

String strSql = "select top" + pageNum * pageBean.rowsPerPage
+ "* from contact order by userName";
ResultSet rset = stmt.executeQuery(strSql);
int i = 0;
while (rset.next()) {
if (i > (pageNum - 1) * pageBean.rowsPerPage - 1) {
Object[] obj = new Object[6];
obj[0] = rset.getString("userName");
obj[1] = new Integer(rset.getInt("mobile"));
obj[2] = rset.getString("phone");
obj[3] = rset.getString("mail");
obj[4] = rset.getDate("lastcontact");
obj[5] = rset.getString("mem");
v.add(obj);
}
i++;
}
rset.close();
stmt.close();
pageBean.curPage = pageNum;
pageBean.data = v;
return pageBean;
} catch (Exception e) {
e.printStackTrace();
throw e;
} finally {

}
}

public Vector getResult() throws Exception {
return v;
}
public static void main(String[] args) {
int j = 0;
try {
67ContactBean d = new ContactBean();
j = d.getAvailableCount();
System.out.println(j);
} catch (Exception e) {
e.printStackTrace();
}
}
}
DatabaseConn.java:
package com.jspdev.util;

import java.sql.*;
import javax.naming.Context;
import javax.sql.DataSource;
import javax.naming.InitialContext;

public class DatabaseConn {

/**
* @param args
*/
public static synchronized Connection getConnection() throws Exception {

try {
Context initCtx = new InitialContext();
17Context envCtx = (Context) initCtx.lookup("java:comp/env");
DataSource ds = (DataSource) envCtx.lookup("jdbc/DBPool");
return ds.getConnection();
} catch (SQLException e) {
throw e;
} catch (Exception e) {
throw e;
}
}
}
运行ContactBean.java怎么报如下错误呢?
javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:645)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:247)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:284)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at com.jspdev.util.DatabaseConn.getConnection(DatabaseConn.java:17)
at com.jspdev.page.ContactBean.<init>(ContactBean.java:11)
at com.jspdev.page.ContactBean.main(ContactBean.java:67)

why edited on 2006-05-07 19:17

话题树型展开

人气	标题	作者	字数	发贴时间
8534	请教一个关于JNDI的问题??	sun7bear	2999	2006-05-07 12:06
6767	Re:请教一个关于JNDI的问题??	sunjavaduke	25	2006-05-07 14:56
7203	Re:请教一个关于JNDI的问题??	sun7bear	2124	2006-05-07 15:57
7804	Re:请教一个关于JNDI的问题??	sun7bear	7	2006-05-09 18:07

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