摘录/翻译 一点我觉得挺有意思的部分:

1. How many people in this room write code entirely by themselves only.  Never with other people? or how many like writing code by yourself.
   这是一个问题. 很少有人完全独立编程, 但有很多人希望能够独立编程;
2. How many people in this room do code reviews as part of development process?
   多数人举手.  所以, 如果所在的团队没有code review, 是不是该考虑开始code review 或是离开?
3. Who is afraid of look stupid in front of people?
   多数人都不希望在别人面前犯二.
4. Bus factor is the number of people on your software project that have to get hit by a bus that are gonna leave you in a world of hee.
5. Lose the ego 放低自己
6. Criticism is not Evil 批评不是恶魔
7. At Google, actually, we’re not allowed to submit code into our version control system until there’s code review
   在Google, 在提交代码之前必须进行代码审查
8. When failure does happen, be ready for it, don’t freak out, document what happened, what did you learn from it? what are you going to do different next time? write it up and learn from it
9. Iterate Quickly: The faster you can fail and the faster you can iterate, the faster you can learn and get  better.
10. Practice is Key
11. To be a small fish: If you were the senior developer on a team or in a company or something, and everyone looks to you and you’re sort of the teacher, or the king, queen whatever, if you’re only working with people junior to you, you are going to learn things from them, but it’s gonna be harder to improve your skills.
    When you are a big fish in a pond, it’s very comfortable, but you’re not really learning very much. you feel safe, but you don’t get much better. and when you are a small fish in a huge pond, it’s very scary.
12. Be Influenced: the more that you’re open to the influence of other people, who might have a really good idea,
13. Be Vulnerable: If you can show yourself to be open to change and willing to admit mistake
14. Case Study: Subversion
    It started out with three guys in an office writing a design doc together, just the three of them. Took up maybe two weeks or three weeks, to actually get it right.  two or three is best.  If you travel with more than six people, you can’t go anywhere…
    After we got design doc, we brought it to a larger forum, invited comments, put it up on a web site,  and began to get feedback. and then we just started coding,  amazingly, about a month or two later, we had some working, very basic working code, and suddenly, as soon as we had working code, suddenly all these people started showing up. we didn’t even advertise, but somehow, it was like we crossed the magic threshold. ( 9 years ago, it was only CVS)
15. 
    If you do all these things, people will Think You’re a Genius.

for example, A created new issue, assigned to B, B resolved the issue and assign back to A, A closed the issue.
we need get this issue using ‘B’ as the filter.

Solution: Use “Assignee was” filter

Go to “Issue Navigator”, “Switch to advanced searching”,  use this query:

assignee was "userID"

1.  FindBugs

Find potential bugs for you.  “a program which uses static analysis to look for bugs in Java code”

2. eCobertura

“eCobertura is a free Eclipse plugin for Cobertura – a Java code coverage reporting tool.”

With “eCobertura”, we can get an overview of code coverage within Eclipse.

BTW, This plugin hasn’t been updated for more than 2 years.

How to clear the code coverage highlighting?
Currently, no this feature (https://github.com/jmhofer/eCobertura/issues/8), but can reset by edit the java class.

3. CheckStyle

Help developer to check the coding style, for example, coding conversation, make sure the code is clean and neat.

Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. It automates the process of checking Java code to spare humans of this boring (but important) task. This makes it ideal for projects that want to enforce a coding standard.

[to be continued]

Select some data using ‘IN’ clause, the result should keep the same order as the in conditions.

Solution: Use CharIndex in Order by

SELECT SECCODE, SECSNAME FROM SECURITY
WHERE SECCODE IN
    ('1U68',
    '1F77')
ORDER BY
CharIndex(LTRIM(RTRIM([SECCODE])), '1U68, 1F77')

In MySQL, you can use “Order By Field()
http://www.electrictoolbox.com/mysql-order-specific-field-values/

Solution:

Specify the sequence:

package com.liguoliang.jee.vo;

/**
 * Represents Client.
 * @author Guoliang
 *
 */
@Entity
@Table (name="Client")
public class Client {
	
	@Id
	@Column(name="id")
	@SequenceGenerator(name="my_seq", sequenceName="CLIENT_ID_SEQUENCE")
	@GeneratedValue(strategy = GenerationType.SEQUENCE ,generator="my_seq")
	private int id;
	
	@Column(name="name")
	String name;
	
	public Client() {
		// TODO Auto-generated constructor stub
	}
//....

}

(MyBatis) Error 2: java.sql.SQLException: Invalid column type: getInt not implemented for class oracle.jdbc.driver.T4CRowidAccessor

Code before change:

	/**
	 * insert new client.
	 * @param client
	 */
	
	@Insert("INSERT INTO CLIENT(name) VALUES (#{name})")
	@Options(useGeneratedKeys=true, keyProperty="id")
	void insert(Client client);

Solutions:

1. Directly Remove @Options(useGeneratedKeys=true, keyProperty=”id”)

2. Replace @Options with @SelectKey:

	/**
	 * insert new client.
	 * @param client
	 */
	
	@Insert("INSERT INTO CLIENT(name) VALUES (#{name})")
	@SelectKey(
			keyProperty = "id",
			before = true,
			resultType = Integer.class,
			statement={" select CLIENT_ID_SEQUENCE.nextval AS id from dual"}
			)
	void insert(Client client);

After googling, got the solution: configure maven-compiler-plugin:

  <build>
    <finalName>J2EE</finalName>
    <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>2.1</version>
          <configuration>
            <source>1.7</source>
            <target>1.7</target>
          </configuration>
        </plugin>
    </plugins>
  </build>

http://stackoverflow.com/questions/3539139/what-causes-a-new-maven-project-in-eclipse-to-use-java-1-5-instead-of-java-1-6-b

Download the Oracle 11 XE 32 bit and install it.

No problem for me ( Win7 64)

Forgot the sys password, how to reset?

Conn / as sysdba

passw system

input new password.

[http://rolfje.wordpress.com/2007/01/16/lost-oracle-sys-and-system-password/]

How to get the version of Oracle?

select * from v$version

How to Add Oracle JDBC Driver in Loacl Maven Repo?

mvn install:install-file -Dfile=C:\oraclexe\app\oracle\product\11.2.0\server\jdbc\lib\ojdbc6.jar -DgroupId=com.oracle -DartifactId=ojdbc6 -Dversion=11.2.0 -Dpackaging=jar
then add modify your pom:

<dependency>
	<groupId>com.oracle</groupId>
	<artifactId>ojdbc6</artifactId>
	<version>11.2.0</version>
</dependency>

[http://www.mkyong.com/maven/how-to-add-oracle-jdbc-driver-in-your-maven-local-repository/]

Quick test using JDBC

	public static void main(String[] args) throws Throwable {
		
		Class.forName("oracle.jdbc.driver.OracleDriver");
		Connection connection = null;
		connection = DriverManager.getConnection(
			"jdbc:oracle:thin:@localhost:1521:xe","root","root");
		System.out.println(connection.getMetaData().getDatabaseMajorVersion());
		connection.close();
	}

Generate RSA key pair using Java,  and test encryption/decryption.

Source code:

package com.rsa;

import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;

import javax.crypto.Cipher;

public class RSATest {

	/**
	 * Generate key pair and encrypt/decrypt message.
	 * @param args
	 * @throws Throwable
	 */
	public static void main(String[] args) throws Throwable {

		String str = "liguoliang.com";
		
		// init private/public key
		KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
		keyGen.initialize(512);
		KeyPair keyPair = keyGen.generateKeyPair();
		PrivateKey privateKey = keyPair.getPrivate();
		PublicKey publicKey = keyPair.getPublic();

		System.out.println("privateKey: " + privateKey);
		System.out.println("PublicKey: " + publicKey);

		System.out.println("Original message: [" + str + "]");
		
		// init cipher
		Cipher cipher;
		cipher = Cipher.getInstance("RSA");
		
		// Encrypt
		cipher.init(Cipher.ENCRYPT_MODE, publicKey);
		byte[] encryptedMsg = cipher.doFinal(str.getBytes());
		System.out.println("Encrypted message: [" + new String(encryptedMsg) + "]");

		// Decrypt
		cipher.init(Cipher.DECRYPT_MODE, privateKey);
		byte[] decryptedMsg = cipher.doFinal(encryptedMsg);
		System.out.println("Decrypted message: [" + new String(decryptedMsg) + "]");
	}
}

Output:

Reference

RSA Encryption in Java – http://tspycher.com/2012/10/rsa-encryption-in-java/

用实例给新手讲解RSA加密算法 – http://bank.hexun.com/2009-06-24/118958531.html

http://introcs.cs.princeton.edu/java/78crypto/RSA.java.html