package com.DBUtils;import java.lang.reflect.Field;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.ResultSetMetaData;import java.sql.SQLException;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import com.bean.UserInfo;public class JdbcUtils {    private static final String USERNAME = "system";//数据库用户名    private static final String PASSWORD = "zZ123456";//数据库密码    private static final String DRIVER = "oracle.jdbc.driver.OracleDriver";//驱动信息    private static final String URL = "jdbc:oracle:thin:@localhost:1521:bookstore";//数据库地址    private Connection connection = null;    private PreparedStatement statement = null;    private ResultSet resultSet = null;    public JdbcUtils() {        try {            Class.forName(DRIVER);            System.out.println("Connect database Successlly！");        } catch (ClassNotFoundException e) {            e.printStackTrace();        }    }        /**     * 得到数据库连接     * @return connection     */    public Connection getConnection() {        try {            connection = DriverManager.getConnection(URL, USERNAME, PASSWORD);        } catch (SQLException e) {            e.printStackTrace();        }        return connection;    }        /**     * 更新操作（增删改）     * @param sql     * @param params     * @return boolean     * @throws SQLException     */    public boolean updateByPreparedStatement(String sql,List

 

package com.bean;import java.io.Serializable;import java.util.Arrays;import java.util.Date;public class UserInfo implements Serializable{         private static final long serialVersionUID = 1L;    private String username;    private String password;        public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    @Override    public String toString() {        return "UserInfo [username=" + username + ", password=" + password                + ", getClass()=" + getClass() + ", hashCode()=" + hashCode()                + ", toString()=" + super.toString() + "]";    }    }