20145321 Java Programming 9th Week of study summary

Source: Internet
Author: User

20145321 "Java program Design" 9th Week study summary Textbook Learning content summary 16th Chapter Integration Database 16.1 JDBC
 1、JDBC简介:    JDBC是Java联机数据库的标准规范,它定义一组标准类和接口,应用程序需要联机数据时调用    这组标准API。    应用程序通过通信协议对数据库进行指令交换,以进行对数据的的增删查找。 2、JDBC标准分为两个部分:    JDBC应用开发者接口    JDBC驱动程序开发者接口    更换数据库时只需要更换驱动程序的JAR文档,无需修改应用程序本身。 3、驱动程序4种类型:    JDBC-ODBC Bridge Driver    Native API Driver    JDBC-Net Driver    Native Protocl Drivel 4、连接数据库:    注册Java操作对象: 操作Driver接口的对象是JDBC进行数据库存取的起点。    取得Connection操作对象    关闭Connection操作对象: 可以自动关闭 5、Conection是数据库连接的代表对象,接下来必须取得java.sql.Statement操作对象 调    用clearstatement清除设置的参数,之后就能再次使用这个PreparedStatement实例。
16.2 JDBC Advanced
 1、使用DateSource取得联机:    通过getConnection()方法取得Connection。 2、使用ResultSet卷动、更新数据:    可以使用updateXXXX()方法、updateRow()等方法进行数据修改。 3、批次更新:用addbatch收集收集sql可以实现批次更新。 4、Blob与Clob:如果要将文档写入数据库,可以在数据库表格字段上使用Blob与Clob。 5、交易简介:    交易的四个基本要求是原子性、一致性、隔离行为与持续性。    多个交易并行时,可能引发很多数据不一致的问题。 6、metadata:取得数据库的整体信息,取得域名字段类型等信息。 7、RowSet:可以使用RowSet对列集合进行增删查改。
Problems in code debugging and resolving process code managed Learning progress bar new/cumulative) /cumulative)
lines of code (new/cumulative) Blog Volume (Learning time (new
Goal 3500 rows 28 Articles 300 hours
First week 150/150 1/2 20/20
Second week 150/300 1/3 20/40
Third week 150/450 1/4 20/60
Week Four 250/700 1/5 20/80
Week Five 200/900 1/6 10/90
Week Six 200/1100 2/8 20/110
Seventh Week 250/1350 2/10 20/130
Eighth Week 200/1550 2/12 20/150
Nineth Week 200/1750 2/14 20/170

20145321 Java Programming 9th Week of study summary

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