20165230 2017-2018-2 "Java Programming" 7th Week study Summary

Source: Internet
Author: User

20165230 2017-2018-2 "Java program Design" 7th Week study Summary Textbook Learning contents Summary 11th Chapter JDBC and MySQL Database
    • This week learned how to use the APIs and databases provided by the JDBC language in Java programs to interact with information
    • Learned the MySQL database management system
    • Use Connection getConnection(java.lang.String) the method to make the application connect to the database:DriverManager.getConnection(uri)

      Problems in teaching materials learning and the solving process
    • Question 1:jdbc-mysql which directory should the database-driven jar files be copied to?
    • Issue 1: Find out through online enquiry
      Need to be copied to the JDK's extension directory (that is, the JDK specified by the JAVA_HOME environment variable)

    • Question 2: What are the benefits of preprocessing statements?
    • Issue 2: Learn from the textbook to alleviate the burden of SQL statement interpreter inside the database

Problems in code debugging and the resolution process
    • Issue 1: Display is unsuccessful while debugging the running code of the connection database

    • Solution: Found in the password password more knock a space, but actually set the time without setting the password, so display error, delete the space to display a successful connection
    • Issue 2: When debugging example11_1, the query was unsuccessful because the table name created is inconsistent with the book

    • Solution: Create a database named students in phpMyAdmin and use the " rs=sql.executeQuery("SELECT * FROM students "); " statement to successfully display

Code Hosting

Https://gitee.com/BESTI-IS-JAVA-2018/20165230/commit/5dd42538867b45b2b037b6d2039c2cf622fd26d9

Other (sentiment, thinking, etc., optional)
    • This week, due to the task and experiment of pairing programming, we only learned to understand the Example11_1 code example, and the knowledge points behind the 11th chapter will be supplemented by learning in the later study.
Learning progress Bar
lines of code (new/cumulative) Blog Volume (Add/accumulate) Learning Time (new/cumulative) Important Growth
Goal 5000 rows 30 Articles 400 hours
First week 13/13 1/30 19/19
Second week 426/426 3/30 12/12
Third week 562/562 4/30 15/15
Week Four 1552/1958 5/30 16/16
Week Five 1123/3086 6/30 14/14
Resources
    • "Java2 Practical Course (Fifth Edition)" Learning Guide

    • Idea Configure Git

    • Intellj Idea Easy Tutorial
    • Debugging Java programs with JDB

20165230 2017-2018-2 "Java Programming" 7th Week study Summary

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