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!
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