systemcfgdao.java

中国移动定位引擎的客户端

package ffcs.lbp.dao;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import ffcs.db.DBPool;
import ffcs.db.JdbcUtil;

/**
* <p>Title: 小区推送LBP项目</p>
* <p>Description: 
* 到系统配置表读取参数配置信息
* </p>
* <p>Copyright: 2007 福建福富软件技术股份有限公司 </p>
* <p>Company: 福建福富软件技术股份有限公司</p>
* @author chenxin
* @version $Rev:1.0 $Date: 2007-11-30
*/
public class SystemCfgDao {
    private String sqlQuery ="select v_value from cfg_info";

	public SystemCfgDao(){
		
	}
	/**
	 * 
	 * @param key 参数配置项
	 * @return 参数配置值
	 * @throws SQLException
	 */
    public String getSystemValue(String key) throws SQLException {
    	if(key==null){
    		return null;
    	}
    	
    	StringBuffer  sql = new StringBuffer(sqlQuery);
    	sql.append(" where v_name='" + key + "'");
    	
    	Connection conn = null;
    	Statement st =null;
        ResultSet rs = null;
        String keyValue=null;
        try{
            conn = DBPool.getConnection();
            st = conn.createStatement();
            rs = st.executeQuery(sql.toString());
            if (rs.next()) {
            	keyValue = rs.getString("v_value");
            }
            
        } finally {
            JdbcUtil.closeResultSet(rs);
            JdbcUtil.closeStat(st);
            JdbcUtil.closeConn(conn);
        }
        return keyValue;
    }
}