模糊查询的处理

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
/**
 * 模糊查询
 */
public class FuzzyQueryTest {
    /**
     * 根据用户名称模糊查询用户信息
     */
    public List<Users> fuzzyQuery(String username){
        Connection connection = null;
        PreparedStatement preparedStatement = null;
        ResultSet resultSet = null;
        List<Users> list = new ArrayList<>();
        try {
            connection = JDBCUtils.getConnection();
            preparedStatement = connection.prepareStatement("select * from users where username like ?");
            preparedStatement.setString(1,username);
            resultSet=preparedStatement.executeQuery();
            while(resultSet.next()){
                Users users = new Users();
                users.setUsername(resultSet.getString("username"));
                users.setUserid(resultSet.getInt("userid"));
                users.setUserage(resultSet.getInt("userage"));
                list.add(users);
            }
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            JDBCUtils.clossResource(resultSet,preparedStatement,connection);
        }
        return list;
    }
    public static void main(String[] args) {
        FuzzyQueryTest fuzzyQueryTest = new FuzzyQueryTest();
        List<Users> users = fuzzyQueryTest.fuzzyQuery("%g%");
        for(Users user1:users){
            System.out.println(user1.getUserid()+" "+user1.getUsername()+" "+user1.getUserage());
        }
    }
}