Spring Employee Management System SSH 1

"Configure Spring and test"

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Introduce the Spring package and write the applicationcontext.xml file, which is placed in the src directory

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Create a domain package and write an employee class Employee.java

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In Employee.java

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public class Employee

{

Private Integer ID;

private String name;

Private String Email;

Private String pwd;

private Integer grade;

Private Java.util.Date hiredate;

Private Float salary;

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Public Employee () {}

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Public Employee (string name, string email, string pwd, Integer grade,

Date HireDate, Float salary)

{

THIS.name = name;

This.email = email;

This.pwd = pwd;

This.grade = grade;

This.hiredate = hiredate;

This.salary = salary;

}

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// setfor each attribute field,get method

}

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Configuring Beans in the applicationcontext file

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<bean id= "employee" class= "Com.hsp.domain.Employee ( class path, including package path, not behind java)" >

<property name= "name" value= "Tong"/>

</bean>

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New test class Test.java, test in the main function of Test.java

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ApplicationContext ac=new classpathxmlapplicationcontext ("Applicationcontext.xml");

Employee Employee=ac.getbean ("employee");

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"Configure Hibernate"

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The hibernate.cfg.xml file Object mapping file and Sessionfactory are configured in the Spring file

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Introducing Hibernate Packages

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Configure the data source because Spring advocates development of the data source

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<bean id= "DataSource" class= "Org.apache.commons.dbcp.BasicDataSource" destroy-method= "Close" >

<!-- This section is the same as hibernate Configuration -

<property name= "Driverclassname" value= "Oracle.jdbc.driver.OracleDriver"/>

<property name= "url" value= "JDBC:ORACLE:THIN:@127.0.0.1:1521:ORCLHSP"/>

<property name= "username" value= "Scott"/>

<property name= "password" value= "Tiger"/>

<!-- Initial value when connection pooling starts- -

<property name= "InitialSize" value= "3"/>

<!-- The maximum value of the connection pool--

<property name= "maxactive" value= "/>"

<!-- Maximum idle value . After a peak time, the connection pool can slowly release a portion of a connection that has not been used, and has been reduced to maxidle until

<property name= "Maxidle" value= "2"/>

<!-- Minimum idle value . When the number of free connections is less than the threshold, the connection pool will pre-apply for some connections to avoid the flood Peak when it is too late to apply--

<property name= "Minidle" value= "1"/>

</bean>

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Why use a data source this mechanism

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Reduce frequent and database establishment Connection and Disconnect, the data source starts to establish 3 connections, the equivalent of a connection pool, buffer pool, if you need to connect, directly from the connection pool, more than 3 and then establish a connection with the database

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If the maximum number is exceeded, wait for the

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Configure Sessionfactory

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<bean id= "Sessionfactory" class= "Org.springframework.orm.hibernate3.LocalSessionFactoryBean" >

<!-- setting up data sources-

<property name= "DataSource" ref= "DataSource"/>

<!-- took over the Hibernate Object Mapping file--

<property name= "Mappingresources" >

<list>

<value>com/hsp/domain/Employee.hbm.xml</value>

</list>

</property>

<property name= "Hibernateproperties" >

<value>

Hibernate.dialect=org.hibernate.dialect.oracledialect

???????? hibernate.hbm2ddl.auto=update

Hibernate.show_sql=false

Hibernate.format_sql=false????????

</value>

</property>

</bean>

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and Employee.hbm.xml file

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<class name= "Employee" table= "Employee" >

<!-- primary Key Policies --

<id name= "id" type= "Java.lang.Integer" >

<generator class= "native"/>

</id>

<property name= "Email" type= "java.lang.String" >

<column name= "Email" length= "/>"

</property>

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To test

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Written in the main function of Test.java

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Sessionfactory Sf=ac.getbean ("Sessionfactory");

Session s=sf.opensession ();

Employee Employee=new employee (" Zi Liu ", "[email protected]", "145", 1,new java.util.Date (), 234.56f);

Transaction tx=s.begintransaction ();

S.save (employee);

Tx.commit ();

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Query the database, get

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Spring Employee Management System SSH 1