我想做一个以批量/集合方式而不是单例/RBAR 操作的插入语句。
我的 SQL 语法遇到异常,无法理解原因。
public void Insert_tag(ArrayList key, ArrayList key_tag, String[] tag, String[] make_key, String fname, int fseq, ArrayList khannTag)throws Exception{
PreparedStatement prep = Local.prepareStatement("delete from tagDB where fname=? and fseq=?;");
prep.setString(1,fname);
prep.setInt(2,fseq);
prep.execute();
String query = "insert into tagDB values (?, ?, ?, ?, ?, 0, 0, 0, ?, ?, ?)";
for(int i = 0 ; i < key.size()-1 ; i++ ) {
query = query.concat(",(?, ?, ?, ?, ?, 0, 0, 0, ?, ?, ?)");
}
System.out.println(query);
PreparedStatement prep3 = Local.prepareStatement(query); // <<<< Exception
for(int n=0 ; n<key.size() ; n++) {
prep3.setString(8*n+1, (String) key.get(n));
prep3.setString(8*n+2, (String) key_tag.get(n));
prep3.setString(8*n+3, (String) khannTag.get(n));
prep3.setString(8*n+4, tag[n]);
prep3.setString(8*n+5,make_key[n]);
prep3.setString(8*n+6,fname);
prep3.setInt(8*n+7,fseq);
prep3.setInt(8*n+8,n);
}
prep3.executeUpdate();
prep3.close();
prep.close();
}
而且,我的日志在这里。
java.sql.SQLException: near ",": syntax error