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
}
//....
}
Code before change:
/**
* insert new client.
* @param client
*/
@Insert("INSERT INTO CLIENT(name) VALUES (#{name})")
@Options(useGeneratedKeys=true, keyProperty="id")
void insert(Client client);
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);
I created a maven java project, and I want to use some new feature in Java7, but every time, after update the project, the JRE will be changed to 1.5 automatically.
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>
Download the Oracle 11 XE 32 bit and install it.
No problem for me ( Win7 64)
Conn / as sysdba
passw system
input new password.
[http://rolfje.wordpress.com/2007/01/16/lost-oracle-sys-and-system-password/]
select * from v$version
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/]
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();
}
import java.io.IOException;
import org.apache.log4j.FileAppender;
import org.apache.log4j.Logger;
import org.apache.log4j.PatternLayout;
/**
* Test for adding appender to log4j at runtime.
* @author SGSCLGLD
*
*/
public class LogingTest {
static Logger log = Logger.getLogger(LogingTest.class);
public static void main(String[] args) throws IOException {
// setting up a FileAppender at runtime.
PatternLayout patternLayout = new PatternLayout();
patternLayout.setConversionPattern("[%d{d/M/yyyy HH:mm:ss}] %p [%t] %c{1}.%M(%L) | %m%n");
FileAppender appender = new FileAppender(patternLayout,"D:\\ME\\WS_Share\\test1\\log.txt",false);
log.addAppender(appender);
log.info("Hello world...");
}
}
Generate RSA key pair using Java, and test encryption/decryption.
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) + "]");
}
}
privateKey: Sun RSA private CRT key, 512 bits
modulus: 6722431852833652083740039
public exponent: 65537
private exponent: 171186757391917267536..695551529001
prime p: 9879891158983359366387147661330…7700131643
prime q: 680415577930859..89085598145526159671701009583973
prime exponent p: 320741816528876..9797652301875289
prime exponent q: 1025757344699..140192255455019921532401
crt coefficient: 60972956628933..8290909983925983303
PublicKey: Sun RSA public key, 512 bits
modulus: 672243185283365208374001..
public exponent: 65537
Original message: [liguoliang.com]
Encrypted message: ['ËŸò¬Œ÷Já°`ð«6L´aZ0Ž¶¹mçZaÐvCóG%P ƒtÂÌÖ9ØùýY,vÎ`¦Y»ù h]
Decrypted message: [liguoliang.com]
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
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