(一)创建工程，引入驱动包

在下图目录中可以找到驱动包ORACLE的JDBC驱动包，拷贝到工程即可使用

创建java工程waterboss，建立lib文件夹，将ojdbc.jar拷贝到此文件夹，然后add build path

我们通常编写BaseDao负责加载驱动，获取数据库连接，关闭资源，代码如下：

package cn.itcast.waterboss.dao;import java.sql.SQLException;/** * 基本数据访问类 * @author Administrator * */public class BaseDao {  //加载驱动  static {    try {      Class.forName("oracle.jdbc.driver.OracleDriver");    } catch (ClassNotFoundException e) {      e.printStackTrace();    }  }  /**   * 获取数据库连接   * @return   * @throws SQLException   */  public static java.sql.Connection getConnection() throws SQLException {    return java.sql.DriverManager.getConnection(      "jdbc:oracle:thin:@192.168.80.10:1521:orcl",      "wateruser",      "itcast"    );  }  /**   * 关闭资源   * @param rs   * @param stmt   * @param conn   */  public static void closeAll(    java.sql.ResultSet rs,    java.sql.Statement stmt,    java.sql.Connection conn  ) {    //关闭结果集    if (rs != null) {      try {        rs.close();      } catch (SQLException e) {        e.printStackTrace();      }    }    //关闭执行对象    if (stmt != null) {      try {        stmt.close();      } catch (SQLException e) {        e.printStackTrace();      }    }    //关闭执行对象    if (conn != null) {      try {        conn.close();      } catch (SQLException e) {        e.printStackTrace();      }    }  }}

JDBC驱动为：

oracle.jdbc.OracleDriver

连接字符串( 瘦连接 )：

jdbc:oracle:thin:@虚拟机的 IP:1521:orcl

(三)业主增删改代码编写

1.创建实体类

package cn.itcast.waterboss.entity;import java.util.Date;/** * 业主实体类 * @author Administrator * */public class Owners {  private Long id; //编号  private String name; //业主名称  private Long addressid; //地址编号  private String housenumber; //门牌号  private String watermeter; //水表编号  private Date adddate; //登记日期  private Long ownertypeid; //业主类型 ID  public Long getId() {    return id;  }  public void setId(Long id) {    this.id = id;  }  public String getName() {    return name;  }  public void setName(String name) {    this.name = name;  }  public Long getAddressid() {    return addressid;  }  public void setAddressid(Long addressid) {    this.addressid = addressid;  }  public String getHousenumber() {    return housenumber;  }  public void setHousenumber(String housenumber) {    this.housenumber = housenumber;  }  public String getWatermeter() {    return watermeter;  }  public void setWatermeter(String watermeter) {    this.watermeter = watermeter;  }  public Date getAdddate() {    return adddate;  }  public void setAdddate(Date adddate) {    this.adddate = adddate;  }  public Long getOwnertypeid() {    return ownertypeid;  }  public void setOwnertypeid(Long ownertypeid) {    this.ownertypeid = ownertypeid;  }}

2.创建Dao类实现增删改

package cn.itcast.waterboss.dao;import cn.itcast.waterboss.entity.Owners;import java.sql.SQLException;/** * 业主数据访问类 * @author Administrator * */public class OwnersDao {  /**   * 新增业主   * @param owners   */  public static void add(Owners owners) {    java.sql.Connection conn = null;    java.sql.PreparedStatement stmt = null;    try {      conn = BaseDao.getConnection();      stmt =        conn.prepareStatement("insert into T_OWNERS values(?,?,?,?,?,?,?)");      stmt.setLong(1, owners.getId());      stmt.setString(2, owners.getName());      stmt.setLong(3, owners.getAddressid());      stmt.setString(4, owners.getHousenumber());      stmt.setString(5, owners.getWatermeter());      stmt.setDate(6, new java.sql.Date(owners.getAdddate().getTime()));      stmt.setLong(7, owners.getOwnertypeid());      stmt.execute();    } catch (SQLException e) {      e.printStackTrace();    } finally {      BaseDao.closeAll(null, stmt, conn);    }  }  /**   * 修改业主   * @param owners   */  public static void update(Owners owners) {    java.sql.Connection conn = null;    java.sql.PreparedStatement stmt = null;    try {      conn = BaseDao.getConnection();      stmt =        conn.prepareStatement(          "update T_OWNERS set     name=?,addressid=?,housenumber=?," +          "watermeter=?,adddate=?, ownertypeid=? where     id=?"        );      stmt.setString(1, owners.getName());      stmt.setLong(2, owners.getAddressid());      stmt.setString(3, owners.getHousenumber());      stmt.setString(4, owners.getWatermeter());      stmt.setDate(5, new java.sql.Date(owners.getAdddate().getTime()));      stmt.setLong(6, owners.getOwnertypeid());      stmt.setLong(7, owners.getId());      stmt.execute();    } catch (SQLException e) {      e.printStackTrace();    } finally {      BaseDao.closeAll(null, stmt, conn);    }  }  /**   * 删除业主   * @param owners   */  public static void delete(Long id) {    java.sql.Connection conn = null;    java.sql.PreparedStatement stmt = null;    try {      conn = BaseDao.getConnection();      stmt = conn.prepareStatement("delete from T_OWNERS where id=?");      stmt.setLong(1, id);      stmt.execute();    } catch (SQLException e) {      e.printStackTrace();    } finally {      BaseDao.closeAll(null, stmt, conn);    }  }}