public void update(String tname,String hname,String titlevalue1,String titleid,int idvalue) {//改
//update ztetitle set title='solutions123' where titleid='1';
String sql="update "+tname+" set "+hname+" = ? where "+" titleid ="+idvalue+"";
try {
database.conn=database.getConn();
database.pstm=database.conn.prepareStatement(sql);
database.pstm.setString(1, titlevalue1);//不知为什么hname必须用问号在下面set
database.pstm.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void update(String cloumn1,String title,String cloumnid,int id) {//改
// 项目 title下目录
//update ztetitle set title='solutions123' where titleid='1;
String sql="update ztetitle set "+cloumn1+" = ? where ? = ?";//set后面直接代入列名,列值则用?导入
try {
database.conn=database.getConn();
database.pstm=database.conn.prepareStatement(sql);
database.pstm.setString(1,title);
database.pstm.setString(2,cloumnid );
database.pstm.setString(3,(id+""));
database.pstm.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
database.close();
}
两句关于datetime的sql
select n.newsname,(to_number(to_char(n.NEWSDATE,'yyyymmdd'))),p.explaination from news n,picture p where n.news_id =p.id and n.news_id=#{newsId}
insert into news values (#{newsName},to_date(#{newsDate},'yyyymmdd'),#{newsId})//在xml中千万不能有分号
mybaits错误解决:There is no getter for property named ... in 'class java.lang.String'
<select id = "getNewsById" parameterType = "int" resultMap = "news">
select *
from News
where newsid in
<foreach collection ="#{_parameter}" item = "item" index = "index"//此处用#{_parameter}或者接口加@Param("newsId")
open = "(" separator = "," close = " )">
//Could not set parameters for mapping把#改成$
${item}
</foreach>
</select>
关于property,里面换行不要打冒号不要打冒号不要打冒号