Java如何做到代码重用

首先在公共类写好数据库连接和关闭方法：

/** * 获取所有的标题（int)by type） */public static List<Article> getArticles(int type){String sql = "select * from article where type=?";return GetDataBean.getArticlesBySql(sql, type);}/** * 获取所有的标题（(int)by type,(String)by usrname） */public static List<Article> getArticles(int type,String username){String sql = "select * from article where type=? and writer=?";return GetDataBean.getArticlesBySql(sql, type, username);}/** * 搜索 * @param type * @param title * @param writer * @return */public static List<Article> getArticles(int type,String title,String writer){String sql = "select * from article where type=? and writer=? and title=? ";return GetDataBean.getArticlesBySql(sql, type, writer, title);}

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