Dynamic "search" query

Question

Hi there, I'm tring to build a dynamic query to search not only the exatly phrase typed by the user but even the single words. So far, I've got how to make the preparedStatement but I'm still stuck in how to make the exactly number of psmt.setString necessary to the preparedStatement. Belowe the code. Thanks in advance for your help.
String query = "";
int i = 0;
for(i = 0; i < java.lang.reflect.Array.getLength(arrayWords); i++){
String tmp = arrayWords;
query = query +" OR title LIKE ? OR content LIKE ?";
connection = DriverManager.getConnection(DB_properties.getDB_url(),DB_properties.getDB_username(),DB_properties.getDB_password());
pstmt = connection.prepareStatement("SELECT * FROM search_content WHERE title LIKE ? OR content LIKE ?"+query+";");
pstmt.setString(1,words);
pstmt.setString(2,words);
//for(){}
rs = pstmt.executeQuery();

Answer 1

for every ? in your preparedQuery, you need a preparedQuery.set...
why do you use reflection to get the length of an array? why not use:
int[] ar = {1,2,3,4};
System.out.println(ar.length);you might want to consider using "... WHERE title IN (title1, title2, ..) OR content IN (content1, content2,...)"
now unfortunatly jdbc seems to be not properly specified with the #setArray, oracle uses it in above mentioned context(e.g. "... WHERE title IN ?" and you set a string-array) mysql doesn't.(you would need something like "...WHERE title IN (?,?,?,?,?)"
but in either of this case, or yours, its usually better to create a prepared query once, and than just insert the values with each fetch. just use enough ?'s and set the not-needed ones to NULL. it will still be more efficient than creating a query everytime.