在本章中,我们将讨论 BeanEditForm 和网格组件与Hibernate的集成. Hibernate通过hibernate模块集成到tapestry中.要启用hibernate模块,请在 pom.xml 文件中添加tapestry-hibernate依赖项和 hsqldb .现在,通过位于资源文件夹根目录下的 hibernate.cfg.xml 文件配置hibernate.
<dependency> <groupId>org.apache.tapestry</groupId> <artifactId>tapestry-hibernate</artifactId> <version>${tapestry-release-version}</version> </dependency> <dependency> <groupId>org.hsqldb</groupId> <artifactId>hsqldb</artifactId> <version>2.3.2</version> </dependency>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <property name = "hibernate.connection.driver_class"> org.hsqldb.jdbcDriver </property> <property name = "hibernate.connection.url"> jdbc:hsqldb:./target/work/sampleapp;shutdown = true </property> <property name = "hibernate.dialect"> org.hibernate.dialect.HSQLDialect </property> <property name = "hibernate.connection.username">sa</property> <property name = "hibernate.connection.password"></property> <property name = "hbm2ddl.auto">update</property> <property name = "hibernate.show_sql">true</property> <property name = "hibernate.format_sql">true</property> </session-factory> </hibernate-configuration>
让我们看看如何使用BeanEditForm组件和员工列表页面员工添加页面>使用Grid组件.持久层由Hibernate模块处理.
创建一个雇员类并使用@Entity注释对其进行修饰.然后,为相关字段添加验证注释,并为id字段添加hibernate相关注释@Id和@GeneratedValue.另外,将性别设置为枚举类型.
package com.example.MyFirstApplication.entities; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import org.apache.tapestry5.beaneditor.NonVisual; import org.apache.tapestry5.beaneditor.Validate; @Entity public class Employee { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @NonVisual public Long id; @Validate("required") public String firstName; @Validate("required") public String lastName; @Validate("required") public String userName; @Validate("required") public String password; @Validate("required") public String email; public String phone; @Validate("required") public String Street; @Validate("required") public String city; @Validate("required") public String state; @Validate("required,regexp=^\\d{5}(-\\d{4})?$") public String zip; } Gender.java (enum) package com.example.MyFirstApplication.data; public enum Gender { Male, Female }
创建员工列表页面, ListEmployee.java 在页面下的新文件夹employee和/src/main/resources/pages/employee 文件夹中的相应模板文件ListEmployee.tml中. Tapestry通过删除重复数据为子文件夹提供了一个简短的URL.
例如,ListEmployee页面可以通过普通URL(/employee/listemployee)和短URL访问 - (/employee/list).
使用@Inject注释将Hibernate会话注入列表页面.在列表页面中定义属性 getEmployees ,并使用注入的会话对象向员工填充该属性.完成员工类的代码,如下所示.
package com.example.MyFirstApplication.pages.employee; import java.util.List; import org.apache.tapestry5.annotations.Import; import org.apache.tapestry5.ioc.annotations.Inject; import org.hibernate.Session; import com.example.MyFirstApplication.entities.Employee; import org.apache.tapestry5.annotations.Import; @Import(stylesheet="context:mybootstrap/css/bootstrap.css") public class ListEmployee { @Inject private Session session; public List<Employee> getEmployees() { return session.createCriteria(Employee.class).list(); } }
为ListEmployee类创建模板文件.该模板将有两个主要组成部分,分别为 :
PageLink : 创建员工链接页面.
网格 : 用于呈现员工详细信息.网格组件具有源属性以注入员工列表,并包含属性以包括要呈现的字段.
ListEmployee.tml(全部列出员工)
<html t:type = "simplelayout" title = "List Employee" xmlns:t = "http://tapestry.apache.org/schema/tapestry_5_4.xsd"> <h1>Employees</h1> <ul> <li><t:pagelink page = "employee/create">Create new employee</t:pagelink></li> </ul> <t:grid source = "employees" include = "userName,firstName,lastName,gender,dateOfBirth,phone,city,state"/> </html>
创建员工创建模板文件并包含BeanEditForm组件.该组件具有以下属性 :
object : 包括来源.
重新排序 : 定义要渲染的字段的顺序.
submitlabel : 表单提交按钮的消息
完整的编码如下 :
<html t:type = "simplelayout" title = "Create New Address" xmlns:t = "http://tapestry.apache.org/schema/tapestry_5_4.xsd"> <t:beaneditform object = "employee" submitlabel = "message:submit-label" reorder = "userName,password,firstName,lastName, dateOfBirth,gender,email,phone,s treet,city,state,zip" /> </html>
创建员工创建类并包括会话,员工属性,列表页面(导航链接)并定义组件的OnSuccess事件(更新数据的位置) .会话数据使用hibernate会话持久保存到数据库中.
完整的编码如下 :
package com.example.MyFirstApplication.pages.employee; import com.example.MyFirstApplication.entities.Employee; import com.example.MyFirstApplication.pages.employee.ListEmployee; import org.apache.tapestry5.annotations.InjectPage; import org.apache.tapestry5.annotations.Property; import org.apache.tapestry5.hibernate.annotations.CommitAfter; import org.apache.tapestry5.ioc.annotations.Inject; import org.hibernate.Session; public class CreateEmployee { @Property private Employee employee; @Inject private Session session; @InjectPage private ListEmployee listPage; @CommitAfter Object onSuccess() { session.persist(employee); return listPage; } }
添加 CreateEmployee.properties 文件并包含要在表单中使用的消息验证.完整的代码如下 :
zip-regexp=^\\d{5}(-\\d{4})?$ zip-regexp-message = Zip Codes are five or nine digits. Example: 02134 or 901251655. submit-label = Create Employee
员工创建页面和列表页面的屏幕截图如下所示 :