regeditimpl.java

本书由浅入深、循序渐进地介绍了MVC的体系结构和如何构建一个基于MVC的Web框架

package com.myContent.service.impl;

import java.sql.SQLException;

import org.apache.log4j.Logger;

import com.gd.jdbc.impl.GdDbConnection;
import com.myContent.action.RegeditAction;
import com.myContent.dao.UserDAO;
import com.myContent.dao.impl.UserDAOImpl;
import com.myContent.service.Regedit;
import com.myContent.vo.User;
public class RegeditImpl implements Regedit{
	static Logger logger = Logger.getLogger(RegeditImpl.class.getName());
	private UserDAO userDao = null;
	/**该方法用来实现向数据库新增用户
	*/
	public int saveUser(User user) throws Exception{
		int counts = 0;
		//取得连接
		GdDbConnection con = new GdDbConnection(this);
		try {			
			userDao = new UserDAOImpl(con.getConnection(this));
			//开始进行事务处理
			con.beginTransaction(this);
			if (userDao.queryUser(user.getUsername()) == null) {
//				新增用户
				counts = userDao.createUser(user);
			} else {
				counts = 0;
			}
			//事务提交
			con.commit(this);
		} catch (SQLException e) {
			logger.error(e);
        }  catch(Exception e) {
        	//事务回滚
			con.rollback(this);
			logger.error(e);
		} finally {
			//关闭连接
			con.close(this);
			return counts;
		}
  	}
}