<jsp-config>
	<jsp-property-group>
		<display-name>Greomanty Config</display-name>
		<url-pattern>*.jsp</url-pattern>
		<el-ignored>false</el-ignored>
		<page-encoding>utf-8</page-encoding>
		<scripting-invalid>false</scripting-invalid>
		<include-prelude>/common.jsp</include-prelude>
	</jsp-property-group>
    </jsp-config>

<%@ page contentType="text/html;charset=utf-8" %>
<%@ page pageEncoding="utf-8" %>

mysql> SHOW VARIABLES LIKE 'character_set%';
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8                       | 
| character_set_connection | utf8                       | 
| character_set_database   | utf8                       | 
| character_set_filesystem | binary                     | 
| character_set_results    | utf8                       | 
| character_set_server     | utf8                       | 
| character_set_system     | utf8                       | 
| character_sets_dir       | /usr/share/mysql/charsets/ | 
+--------------------------+----------------------------+
8 rows in set (0.00 sec)

mysql> 

Connection db = DriverManager.getConnection("jdbc:mysql://localhost/future?" 
                                +  "user=user_name&password=user_passwd");

PreparedStatement objPs=db.prepareStatement \
                            ("SELECT * FROM src_ippen ORDER BY day DESC");
ResultSet rs=objPs.executeQuery();

$ mysql_upgrade -basedir=/var/lib/mysql -p root

error    : Table upgrade required. Please do "REPAIR TABLE `time_zone_name`" or \
                                                             dump/reload to fix it!
多少のエラーをはいたが、

mysql.help_keyword                                 OK
mysql.help_topic                                   OK
mysql.proc                                         OK
mysql.time_zone_name                               OK
Running 'mysql_fix_privilege_tables'...
OK

$ 
OKが出たので続行した。
そして、コードの書き換えが以下。

import java.sql.DriverManager;

    public static String strDate(){
        Connection db=null;
	PreparedStatement objPs=null;
	ResultSet rs=null;
	String strDate="";
	try{
	   //Context ctx=new InitialContext();
	   //DataSource ds=(DataSource)ctx.lookup("java:comp/env/jdbc/future");

	   //db=ds.getConnection();
	   db = DriverManager.getConnection("jdbc:mysql://localhost/future?" \
                                           +  "user=user_name&password=user_passwd");
           objPs=db.prepareStatement("SELECT * FROM src_ippen ORDER BY day DESC");
	   rs=objPs.executeQuery();
	   if(rs.next()){
	   strDate = rs.getString("day");
	}