本文共 10874 字，大约阅读时间需要 36 分钟。

1、基本的环境

1.1、开发工具：Myeclipse 2017 CI

1.2、struts2：struts-2.3.34

1.3、hibernate：hibernate-release-5.2.10.Final

1.4、tomcat： apache-tomcat-8.5.15

1.5、mysql驱动：mysql-connector-java-5.1.42-bin

1.7、C3P0数据源

1.8、数据库MYSQL5.1以上

2、搭建基本strust2运行环境

2.1、配置web.xml

   
   	
    		
     
      Struts2
     		
     
      org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
     	
    	
    		
     
      Struts2
     		
     
      /*
     	
    	
    		
     
      index.jsp
     	
    
   

2.2、在src目录下创建strust.xml文件(这个是最终的strust.xml)

   
   	
    	
    	
    	
    		
     			
      				
       					
        false				
       			
      		
     		
     		
     			
      
       emp-list
      			
      
       /emp-{1}.jsp
      		
     		
     			
      
       /success.jsp
      		
     	
    
   

3、用hibernate编写dao层

3.1、写一个Employee的javabean

package com.splend.crud.entity;public class Employee {	private Integer employeeId;	private String firstName;	private String lastName;	private String email;	public Employee() {	}	public Employee(Integer employeeId, String firstName, String lastName, String email) {		super();		this.employeeId = employeeId;		this.firstName = firstName;		this.lastName = lastName;		this.email = email;	}	public Integer getEmployeeId() {		return employeeId;	}	public void setEmployeeId(Integer employeeId) {		this.employeeId = employeeId;	}	public String getFirstName() {		return firstName;	}	public void setFirstName(String firstName) {		this.firstName = firstName;	}	public String getLastName() {		return lastName;	}	public void setLastName(String lastName) {		this.lastName = lastName;	}	public String getEmail() {		return email;	}	public void setEmail(String email) {		this.email = email;	}}

3.2、在Employee.java类目录下创建Employee.hbm.xml

3.3、src目录下创建hibernate.cfg.xml文件

   
   	
    	    
     		
     
      splend
     		
     
      1230
     		
     
      com.mysql.jdbc.Driver
     		
     
      jdbc:mysql://localhost:3306/sh
     		
     		
     		
     
      org.hibernate.dialect.MySQL5InnoDBDialect
     		
     		
     
      true
     		
     		
     
      true
     		
     		
     
      update
     		
     		
     
      2
     		
     		
     
      true
     		
     		
     
      10
     		
     
      5
     		
     
      2
     		
     
      2000
     		
     
      2000
     		
     		
     
      10
     		
     		
     		
     
      100
     		
     		
     
      30
     		
     		
     	
    
   

3.4、编写BaseDao<T>的泛型接口

package com.splend.crud.dao;import java.util.List;public interface BaseDao
   
     {	T get(T entity);	/**	 * 获取全部列表	 * 	 * @return 所有T对象	 */	List
    
      getAll();	/**	 * 持久化实例	 * @param entity	 * @return 成功返回true，失败返回false	 */	boolean save(T entity);		/**	 * 更新一个T实例	 * @param entity	 * @return 更新成功返回True否则false	 */	boolean update(T entity);		/**	 * 删除T实例	 * @param entity	 * @return 成功返回true，失败false	 */	boolean delete(T entity);	}
    
   

3.5、EmployeeDao.java

package com.splend.crud.dao;import com.splend.crud.entity.Employee;public interface EmployeeDao extends BaseDao
   
     {}
   

3.6、编写EmployeeDaoImpl实现类

package com.splend.crud.dao;import java.util.List;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.boot.MetadataSources;import org.hibernate.boot.registry.StandardServiceRegistry;import org.hibernate.boot.registry.StandardServiceRegistryBuilder;import com.splend.crud.entity.Employee;public class EmployeeDaoImpl implements EmployeeDao {	private SessionFactory sessionFactory;	private Session session;	private Transaction transaction;	public EmployeeDaoImpl() {		final StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build();		try {			sessionFactory = new MetadataSources(registry).buildMetadata().buildSessionFactory();			session = sessionFactory.openSession();		} catch (Exception e) {			StandardServiceRegistryBuilder.destroy(registry);			e.printStackTrace();			System.out.println("EmployeeDaoImpl error");		}finally {			if (session != null) {				session.close();			}		}	}	@Override	public Employee get(Employee entity) {		Employee employee = null;		try {			session = sessionFactory.openSession();			transaction = session.beginTransaction();			employee = session.find(Employee.class, entity.getEmployeeId());			transaction.commit();		} catch (Exception e) {			if (transaction != null) {				transaction.rollback();			}			employee = null;			e.printStackTrace();			System.out.println("public Employee get(Employee entity) error");		}finally {			if (session != null) {				session.close();			}		}		return employee;	}	@SuppressWarnings("unchecked")	@Override	public List
   
     getAll() {		List
    
      employees = null;		try {			session = sessionFactory.openSession();			transaction = session.beginTransaction();			employees = session.createQuery("FROM Employee").list();			transaction.commit();		} catch (Exception e) {			if (transaction != null) {				transaction.rollback();			}			employees = null;			e.printStackTrace();			System.out.println("public List
     
       getAll error");		}finally {			if (session != null) {				session.close();			}		}		return employees;	}	@Override	public boolean save(Employee entity) {		boolean result = false;		try {			session = sessionFactory.openSession();			transaction = session.beginTransaction();			session.save(entity);			transaction.commit();			result = true;		} catch (Exception e) {			if (transaction != null) {				transaction.rollback();			}			result = false;			e.printStackTrace();			System.out.println("public boolean save(Employee entity) error");		}finally {			if (session != null) {				session.close();			}		}		return result;	}	@Override	public boolean update(Employee entity) {		boolean result = false;		try {			session = sessionFactory.openSession();			transaction = session.beginTransaction();			session.saveOrUpdate(entity);			transaction.commit();			result = true;		} catch (Exception e) {			if (transaction != null) {				transaction.rollback();			}			result = false;			e.printStackTrace();			System.out.println("public boolean update(Employee entity) error");		}finally {			if (session != null) {				session.close();			}		}		return result;	}	@Override	public boolean delete(Employee entity) {		boolean result = false;		try {			session = sessionFactory.openSession();			transaction = session.beginTransaction();			session.delete(entity);			transaction.commit();			result = true;		} catch (Exception e) {			if (transaction != null) {				transaction.rollback();			}			result = false;			e.printStackTrace();			System.out.println("public boolean delete(Employee entity) error");		}finally {			if (session != null) {				session.close();			}		}		return result;	}}
     
    
   

3.7 编写EmployeeService

package com.splend.crud.service;import java.util.List;import com.splend.crud.entity.Employee;public interface EmployeeService {	Employee get(Employee employee);	List
   
     getEmployees();	boolean save(Employee employee);	boolean update(Employee employee);	boolean delete(Employee employee);}
   

3.8 编写EmployeeServiceImpl.java

package com.splend.crud.service;import java.util.List;import com.opensymphony.xwork2.inject.Inject;import com.splend.crud.dao.EmployeeDao;import com.splend.crud.entity.Employee;public class EmployeeServiceImpl implements EmployeeService {	@Inject(value="employeeDao",required=true)	private EmployeeDao employeeDao;	@Override	public Employee get(Employee employee) {		return employeeDao.get(employee);	}	@Override	public List
   
     getEmployees() {		return employeeDao.getAll();	}	@Override	public boolean save(Employee employee) {		return employeeDao.save(employee);	}	@Override	public boolean update(Employee employee) {		return employeeDao.update(employee);	}	@Override	public boolean delete(Employee employee) {		return employeeDao.delete(employee);	}}
   

4、编写Action以及相关jsp

package com.splend.crud.handler;import java.util.Map;import org.apache.struts2.interceptor.RequestAware;import com.opensymphony.xwork2.ModelDriven;import com.opensymphony.xwork2.Preparable;import com.opensymphony.xwork2.inject.Inject;import com.splend.crud.entity.Employee;import com.splend.crud.service.EmployeeService;public class EmployeeAction implements RequestAware, ModelDriven
   
    , Preparable {	@Inject(value = "employeeService", required = true)	private EmployeeService employeService;	private Employee employee;	public String edit() {		return "edit";	}	public void prepareEdit() {		Employee emp = new Employee();		emp.setEmployeeId(employeeId);		employee = employeService.get(emp);	}	public String update() {		employeService.update(employee);		return "success";	}	public void prepareUpdate() {		employee = new Employee();	}	public String save() {		employeService.save(employee);		return "success";	}	public void prepareSave() {		employee = new Employee();	}	public String delete() {		Employee emp = new Employee();		emp.setEmployeeId(employeeId);		employeService.delete(emp);		return "success";	}	public String list() {		requset.put("emps", employeService.getEmployees());		return "list";	}	private Map
    
      requset;	private Integer employeeId;	public void setEmployeeId(Integer employeeId) {		this.employeeId = employeeId;	}	/**	 * 获取Request对象的方式，这里选择实现RequestAware接口。	 */	@Override	public void setRequest(Map
     
       request) {		this.requset = request;	}	/**	 * 使用ModelDriven把employee对象放到值栈栈顶。	 */	@Override	public Employee getModel() {		return employee;	}	@Override	public void prepare() throws Exception {		// TODO Auto-generated method stub	}}
     
    
   

4.1、写显示页面emp-list.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"	pageEncoding="UTF-8"%><%@ taglib prefix="s" uri="/struts-tags"%>
   	
   	
   		
    		
    		
    		
    	
   	
   				
   
   
		    
			     
				      
ID
				      
FirstName
				      
LastName
				      
Email
				      
Edit
				      
Delete
			     
		    
		    
			     
					      
${employeeId }
					      
${firstName }
					      
${lastName }
					      
${email }
					      
Edit
					      
Delete
				     
					    
	   

4.2、编写编辑页面

<%@ page language="java" contentType="text/html; charset=UTF-8"	pageEncoding="UTF-8"%><%@ taglib prefix="s" uri="/struts-tags"%>
   	
   		
    		
    		
    		
    		
    	
   

4.3、主页index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"	pageEncoding="UTF-8"%>
   	List All Employees

5、运行结果

5.1、运行index.jsp

5.2、List All Employees

5.3、Edit

6、总结