Experience of connecting Myeclipse to mysql database_MySQL
I am making a J2EE course for my classmates about the struct+hibernate structure. The database used to be Oracle. The database is lost and I don’t want to install Oracle. It’s too cumbersome to install in a notebook and it’s disgusting to not be able to remove it... So I changed to mysql. Let him correct it. Some of the posts on the Internet are too old. The versions and URLs are all renovated without reading the content. It’s too big and not powerful. You still can’t rely entirely on the Internet. After all, you have to believe in yourself for some things - I thought of trying it myself. .Thinking is the way to go.
The above is all nonsense. Start:
Before Myeclipse connects to the mysql database, please do these things:
Steps:
1. Install JDK, Tomcat, myeclipse (Now that MyEclipse8.5 has been fully packaged, eclipse is no longer needed. Of course, I personally think it is better to try eclipse to build the platform)
A few wordy sentences:
There are many eclipse versions. According to your own development purposes, you can carefully find the development version you need. Eclipse3.5 Galileo version + JOSS Tools (plug-in) + MyEclipse plug-in is enough. You can know the basics by doing this. There is no reliance on binding, because the visualization has become less, the configuration files are all handwritten, and JUINT tests are written by myself.
The above nonsense is enough for you to develop J2EE heavyweight development of struct +hibernate+spring.
url: http://www.eclipse.org/downloads/
Screenshot:
2． MyEclipse needs the connect driver to connect to mysql (I have it. If anyone wants to leave me an email, I will send it to you. The company will send it to those who need it at noon),
This also gives the official address: as shown in the picture: detailed labelling, detailed step-by-step diagram
Then:
Then:
Then:
There will be some European and Asian versions next, remember: basically all will work, I chose the American version, any one will work.
Now that the plug-in is available, what is the next step to prepare? -->Installing mysql, I won’t go into details about this, because I think there is only one problem with installing mysql: remembering the user name and password! ! !
Officially entering the topic:
Look at the pictures directly. I think I am stupid in speaking. I just take screenshots. If I talk too much nonsense, I will be scolded.
1．
Note: The double arrow is because both options have the same result.
2.
3.
Click finish to complete the database driver connection.
4.
Opening the connection is to test whether the database configuration is successful-----as long as you are not naughty, you will definitely succeed!!!
5. Next add the binding of mysql data connection:
I won’t write it anymore. Next time I finish editing, I just click Next, and then see a name: mysqljars. Click addJars on the right, and then find yours
Click Done, Done, Done. . . .
Then find a java class under your project, test it, and it’s ok. Of course, you have to have a database first, so I’ll paste the code and class code first
Category name: Whatever
package com.bipt.db;
import java.sql.Statement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
public class DBCon {
public static Connection conn=null;
public static Statement stmt = null;
public static ResultSet rs = null;
public void getCon() throws ClassNotFoundException, SQLException {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection("jdbc:mysql://localhost/btestdemo?"
+ "user=root&password=bipt");
}
public void closeCon(Connection conn) throws SQLException {
if (conn != null)
conn.close();
}
public static void main(String[] args) {
DBCon dbc = new DBCon();
try {
dbc.getCon();
stmt = conn.createStatement();
rs = stmt.executeQuery("select * from user");
while(rs.next()) {
System.out.println(rs.getInt("USERID"));
System.out.println(rs.getString("USERNAME"));
System.out.println(rs.getString("USERPASSWORD"));
// System.out.println(rs.getString("USERMAIL"));
//System.out.println(rs.getDate("USERTIME"));
// System.out.println(rs.getString("USERINTEGRAL"));
//System.out.println(rs.getString("USERSEX"));
System.out.println();
}
System.out.println("conn:" + DBCon.conn);
System.out.println("mysql测试成功");
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
mysql script:
CREATE TABLE `user` ( `USERID` int(11) NOT NULL auto_increment, `USERNAME` varchar(30) NOT NULL default '', `USERPASSWORD` varchar(30) default '', PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=gb2312; go
Run this java class and the console will show that there is user information in the database. It’s too late. Go to bed and edit it another day. It’s too messy.
Hope it helps!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
When might a full table scan be faster than using an index in MySQL?
Apr 09, 2025 am 12:05 AM
Full table scanning may be faster in MySQL than using indexes. Specific cases include: 1) the data volume is small; 2) when the query returns a large amount of data; 3) when the index column is not highly selective; 4) when the complex query. By analyzing query plans, optimizing indexes, avoiding over-index and regularly maintaining tables, you can make the best choices in practical applications.
Can I install mysql on Windows 7
Apr 08, 2025 pm 03:21 PM
Yes, MySQL can be installed on Windows 7, and although Microsoft has stopped supporting Windows 7, MySQL is still compatible with it. However, the following points should be noted during the installation process: Download the MySQL installer for Windows. Select the appropriate version of MySQL (community or enterprise). Select the appropriate installation directory and character set during the installation process. Set the root user password and keep it properly. Connect to the database for testing. Note the compatibility and security issues on Windows 7, and it is recommended to upgrade to a supported operating system.
Explain InnoDB Full-Text Search capabilities.
Apr 02, 2025 pm 06:09 PM
InnoDB's full-text search capabilities are very powerful, which can significantly improve database query efficiency and ability to process large amounts of text data. 1) InnoDB implements full-text search through inverted indexing, supporting basic and advanced search queries. 2) Use MATCH and AGAINST keywords to search, support Boolean mode and phrase search. 3) Optimization methods include using word segmentation technology, periodic rebuilding of indexes and adjusting cache size to improve performance and accuracy.
Difference between clustered index and non-clustered index (secondary index) in InnoDB.
Apr 02, 2025 pm 06:25 PM
The difference between clustered index and non-clustered index is: 1. Clustered index stores data rows in the index structure, which is suitable for querying by primary key and range. 2. The non-clustered index stores index key values and pointers to data rows, and is suitable for non-primary key column queries.
MySQL: Simple Concepts for Easy Learning
Apr 10, 2025 am 09:29 AM
MySQL is an open source relational database management system. 1) Create database and tables: Use the CREATEDATABASE and CREATETABLE commands. 2) Basic operations: INSERT, UPDATE, DELETE and SELECT. 3) Advanced operations: JOIN, subquery and transaction processing. 4) Debugging skills: Check syntax, data type and permissions. 5) Optimization suggestions: Use indexes, avoid SELECT* and use transactions.
The relationship between mysql user and database
Apr 08, 2025 pm 07:15 PM
In MySQL database, the relationship between the user and the database is defined by permissions and tables. The user has a username and password to access the database. Permissions are granted through the GRANT command, while the table is created by the CREATE TABLE command. To establish a relationship between a user and a database, you need to create a database, create a user, and then grant permissions.
Explain different types of MySQL indexes (B-Tree, Hash, Full-text, Spatial).
Apr 02, 2025 pm 07:05 PM
MySQL supports four index types: B-Tree, Hash, Full-text, and Spatial. 1.B-Tree index is suitable for equal value search, range query and sorting. 2. Hash index is suitable for equal value searches, but does not support range query and sorting. 3. Full-text index is used for full-text search and is suitable for processing large amounts of text data. 4. Spatial index is used for geospatial data query and is suitable for GIS applications.
Can mysql and mariadb coexist
Apr 08, 2025 pm 02:27 PM
MySQL and MariaDB can coexist, but need to be configured with caution. The key is to allocate different port numbers and data directories to each database, and adjust parameters such as memory allocation and cache size. Connection pooling, application configuration, and version differences also need to be considered and need to be carefully tested and planned to avoid pitfalls. Running two databases simultaneously can cause performance problems in situations where resources are limited.
