我喜欢将旧的更改为新的和我的旧sql查询其语句,我想更改为准备好的语句。我怎么能改变? 例如:
*
strSql = "SELECT Id as GroupId, Name,Description FROM Groupcodes WHERE deleteFlag=0 and GroupType = '" + StrGroupType + "' ";
if(strSearchBy.length() > 0 && strSearchText.length() > 0)
{
if(strSearchOption.equalsIgnoreCase("Starts With")) {
strSql += " AND " + strSearchBy + " LIKE '" + strSearchText + "%' ";
}
else if(strSearchOption.equalsIgnoreCase("Contains")){
strSql += " AND " + strSearchBy + " LIKE '%" + strSearchText + "%'" ;
}
}
strSql += " ORDER BY Name ASC";
if( nCounter > 0 ) {
strSql += " LIMIT " + (nCounter - 1) + ", " + nMaxCount;
}
*
一旦你教导这个例子,那么我将为即将到来的代码做。
答案 0 :(得分:0)
你这样做:
PreparedStatement mStatement = getDBTransaction().createPreparedStatement("select * from test_table where user_id = ?", 0);
mStatement.setString(1, "4913");
ResultSet rs = mStatement.executeQuery();
'?'字符对查询进行参数化,然后使用setString设置其值。请注意,在setstring函数中,第一个参数由索引1(不是0)表示。另请注意,如果您的条件是比较varchars
,则不需要''