sql注入防御

import org.apache.commons.lang.StringEscapeUtils;
public class SqlEscapeExample {
    public static void main(String[] args) {
        String userName = "1‘ or ‘1‘=‘1";
        String password = "123456";
        userName = StringEscapeUtils.escapeSql(userName);
        password = StringEscapeUtils.escapeSql(password);
        String sql = "SELECT COUNT(userId) FROM t_user WHERE userName=‘"
            + userName + "‘ AND password =‘" + password + "‘";
        System.out.println(sql);
    }
}