S2SH CRUD 整合
Posted zhouixi
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采用的框架 Struts2+Spring4+Hbiernate4.
目录结构
：
EmployeeAction:
1 package com.xx.ssh.actions; 2 3 import java.io.ByteArrayInputStream; 4 import java.io.InputStream; 5 import java.io.UnsupportedEncodingException; 6 import java.util.Date; 7 import java.util.Map; 8 import org.apache.struts2.interceptor.RequestAware; 9 import com.opensymphony.xwork2.ActionSupport; 10 import com.opensymphony.xwork2.ModelDriven; 11 import com.opensymphony.xwork2.Preparable; 12 import com.xx.ssh.entities.Employee; 13 import com.xx.ssh.service.DepartmentService; 14 import com.xx.ssh.service.EmployeeService; 15 16 public class EmployeeAction extends ActionSupport implements RequestAware, 17 ModelDriven<Employee>, Preparable { 18 19 private static final long serialVersionUID = 1L; 20 21 private EmployeeService employssService; 22 23 public void setEmployssService(EmployeeService employssService) { 24 this.employssService = employssService; 25 } 26 27 private DepartmentService departmentService; 28 29 public void setDepartmentService(DepartmentService departmentService) { 30 this.departmentService = departmentService; 31 } 32 33 public String list() { 34 request.put("employees", employssService.getAll()); 35 System.out.println("request: " + request.size()); 36 return "list"; 37 } 38 39 private Integer id; 40 41 public void setId(Integer id) { 42 this.id = id; 43 } 44 45 private InputStream inputStream; 46 47 public InputStream getInputStream() { 48 return inputStream; 49 } 50 //回调函数。判断是否删除 51 public String delete() { 52 try { 53 employssService.delete(id); 54 inputStream = new ByteArrayInputStream("1".getBytes("UTF-8")); 55 } catch (Exception e) { 56 e.printStackTrace(); 57 try { 58 inputStream = new ByteArrayInputStream("0".getBytes("UTF-8")); 59 } catch (UnsupportedEncodingException e1) { 60 e1.printStackTrace(); 61 } 62 } 63 return "ajax-success"; 64 } 65 66 private String lastName; 67 68 public void setLastName(String lastName) { 69 this.lastName = lastName; 70 } 71 //回调函数。判断用户名是否存在。 72 public String validateLastName() { 73 try { 74 if (employssService.lastNameIsValid(lastName)) { 75 76 inputStream = new ByteArrayInputStream("1".getBytes("utf-8")); 77 } else { 78 79 inputStream = new ByteArrayInputStream("0".getBytes("utf-8")); 80 } 81 } catch (Exception e) { 82 83 } 84 return "ajax-success"; 85 } 86 87 private Employee model; 88 89 /* 90 * 可以根椐ID来判断为save方法准备的model是new的还是数据库获取的。 91 */ 92 public void prepareSave() { 93 if (id == null) { 94 model = new Employee(); 95 } else { 96 model = employssService.get(id); 97 } 98 } 99 100 public String save() { 101 102 if (id == null) { 103 model.setCreateTime(new Date()); 104 105 } 106 employssService.saveOrUpdate(model); 107 return SUCCESS; 108 } 109 110 public String input() { 111 request.put("departments", departmentService.getAll()); 112 return INPUT; 113 } 114 115 public void prepareInput() { 116 if (id != null) { 117 model = employssService.get(id); 118 } 119 120 } 121 122 private Map<String, Object> request; 123 124 @Override 125 public void setRequest(Map<String, Object> arg0) { 126 this.request = arg0; 127 128 } 129 130 @Override 131 public Employee getModel() { 132 133 return model; 134 } 135 136 @Override 137 public void prepare() throws Exception { 138 139 } 140 141 }
SSHDateConverter:自定义转换器
1 package com.xx.ssh.converters; 2 3 import java.text.DateFormat; 4 import java.text.ParseException; 5 import java.text.SimpleDateFormat; 6 import java.util.Date; 7 import java.util.Map; 8 9 import org.apache.struts2.util.StrutsTypeConverter; 10 11 public class SSHDateConverter extends StrutsTypeConverter { 12 13 private DateFormat dateFormat; 14 { 15 dateFormat = new SimpleDateFormat("yyyy-MM-dd"); 16 } 17 18 @Override 19 public Object convertFromString(Map context, String[] values, Class toClass) { 20 if(toClass == Date.class){ 21 try { 22 return dateFormat.parse(values[0]); 23 } catch (ParseException e) { 24 e.printStackTrace(); 25 } 26 } 27 28 return null; 29 } 30 31 @Override 32 public String convertToString(Map context, Object o) { 33 if(o instanceof Date){ 34 return dateFormat.format((Date)o); 35 } 36 return null; 37 } 38 39 }
BaseDao：SessionFactory
1 package com.xx.ssh.dao; 2 3 import org.hibernate.Session; 4 import org.hibernate.SessionFactory; 5 6 public class BaseDao { 7 private SessionFactory sessionFactory; 8 9 public void setSessionFactory(SessionFactory sessionFactory) { 10 this.sessionFactory = sessionFactory; 11 } 12 13 public Session getSession() { 14 return this.sessionFactory.getCurrentSession(); 15 } 16 }
DepartmentDao:Dao层
1 package com.xx.ssh.dao; 2 3 import java.util.List; 4 5 import com.xx.ssh.entities.Department; 6 7 public class DepartmentDao extends BaseDao{ 8 public List<Department> getAll(){ 9 String hql="FROM Department"; 10 return getSession().createQuery(hql).list(); 11 } 12 }
EmployeeDao
1 package com.xx.ssh.dao; 2 3 import java.util.List; 4 5 import org.hibernate.Query; 6 import org.hibernate.Session; 7 import org.hibernate.SessionFactory; 8 9 import com.xx.ssh.entities.Employee; 10 11 public class EmployeeDao extends BaseDao { 12 13 14 public void delete(Integer id){ 15 String hql="delete from Employee e where e.id=? "; 16 getSession().createQuery(hql).setInteger(0,id).executeUpdate(); 17 } 18 19 public List<Employee> getAll(){ 20 21 String hql="from Employee e LEFT OUTER JOIN FETCH e.department"; 22 return getSession().createQuery(hql).list(); 23 } 24 public void saveOrUpdate(Employee employee){ 25 getSession().saveOrUpdate(employee); 26 } 27 public Employee getEmployeeByLastName(String lastName){ 28 29 String hql="from Employee e where e.lastName=? "; 30 Query query = getSession().createQuery(hql).setString(0,lastName); 31 return (Employee)query.uniqueResult(); 32 } 33 public Employee get(Integer id){ 34 return (Employee) getSession().get(Employee.class,id); 35 36 } 37 }
实体：Department
1 package com.xx.ssh.entities; 2 3 public class Department { 4 private Integer id; 5 private String departmentName; 6 7 public Integer getId() { 8 return id; 9 } 10 11 public void setId(Integer id) { 12 this.id = id; 13 } 14 15 public String getDepartmentName() { 16 return departmentName; 17 } 18 19 public void setDepartmentName(String departmentName) { 20 this.departmentName = departmentName; 21 } 22 }
实体：Employee
1 package com.xx.ssh.entities; 2 3 import java.util.Date; 4 5 public class Employee { 6 7 8 // 9 private Integer id; 10 //不能被修改 11 private String lastName; 12 private String email; 13 //从前端传入的是string类型，所以需要注意转换。 14 private Date birth; 15 //不能被修改 16 private Date createTime; 17 //单向n-1的关联关系 18 private Department department; 19 20 public Integer getId() { 21 return id; 22 } 23 public void setId(Integer id) { 24 this.id = id; 25 } 26 public String getLastName() { 27 return lastName; 28 } 29 public void setLastName(String lastName) { 30 this.lastName = lastName; 31 } 32 public String getEmail() { 33 return email; 34 } 35 public void setEmail(String email) { 36 this.email = email; 37 } 38 public Date getBirth() { 39 return birth; 40 } 41 public void setBirth(Date birth) { 42 this.birth = birth; 43 } 44 public Date getCreateTime() { 45 return createTime; 46 } 47 public void setCreateTime(Date createTime) { 48 this.createTime = createTime; 49 } 50 public Department getDepartment() { 51 return department; 52 } 53 public void setDepartment(Department department) { 54 this.department = department; 55 } 56 57 @Override 58 public String toString() { 59 return "Employee [birth=" + birth + ", createTime=" + createTime 60 + ", department.id=" + department + ", email=" + email + ", id=" 61 + id + ", lastName=" + lastName + "]"; 62 } 63 }
表与类映射文件配置。
Department.hbm.xml
1 <?xml version="1.0"?> 2 <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 3 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 4 <!-- Generated 2014-7-22 11:21:48 by Hibernate Tools 3.4.0.CR1 --> 5 <hibernate-mapping> 6 <class name="com.xx.ssh.entities.Department" table="SSH_DEPARTMENT"> 7 <id name="id" type="java.lang.Integer"> 8 <column name="ID" /> 9 <generator class="native" /> 10 </id> 11 12 <property name="departmentName" type="java.lang.String"> 13 <column name="DEPARTMENT_NAME" /> 14 </property> 15 16 </class> 17 </hibernate-mapping>
Employee.hbm.xml
1 <?xml version="1.0"?> 2 <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 3 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 4 <!-- Generated 2014-7-22 11:21:48 by Hibernate Tools 3.4.0.CR1 --> 5 <hibernate-mapping> 6 <class name="com.xx.ssh.entities.Employee" table="SSH_EMPLOYEE"> 7 8 <id name="id" type="java.lang.Integer"> 9 <column name="ID" /> 10 <generator class="native" /> 11 </id> 12 13 <property name="lastName" type="java.lang.String"> 14 <column name="LAST_NAME" /> 15 </property> 16 17 <property name="email" type="java.lang.String"> 18 <column name="EMAIL" /> 19 </property> 20 21 <property name="birth" type="java.util.Date"> 22 <column name="BIRTH" /> 23 </property> 24 25 <property name="createTime" type="java.util.Date"> 26 <column name="CREATE_TIME" /> 27 </property> 28 29 <!-- 映射单向 n-1 的关联关系 --> 30 <many-to-one name="department" class="com.xx.ssh.entities.Department" lazy="false"> 31 <column name="DEPARTMENT_ID" /> 32 </many-to-one> 33 34 </class> 35 </hibernate-mapping>
Service层：Department
1 package com.xx.ssh.service; 2 3 import java.util.List; 4 5 import com.xx.ssh.dao.DepartmentDao; 6 import com.xx.ssh.entities.Department; 7 8 public class DepartmentService { 9 private DepartmentDao departmentDao; 10 11 public void setDepartmentDao(DepartmentDao departmentDao){ 12 this.departmentDao=departmentDao; 13 } 14 public List<Department>getAll(){ 15 return departmentDao.getAll(); 16 } 17 18 }
Service层：Employee
1 package com.xx.ssh.service; 2 3 import java.util.List; 4 5 import com.xx.ssh.dao.EmployeeDao; 6 import com.xx.ssh.entities.Employee; 7 8 public class EmployeeService { 9 private EmployeeDao employeeDao; 10 11 public void setEmployeeDao(EmployeeDao employeeDao) 12 { 13 this.employeeDao=employeeDao; 14 } 15 public boolean lastNameIsValid(String lastName){ 16 return employeeDao.getEmployeeByLastName(lastName)==null; 17 } 18 public void delete(Integer id){ 19 employeeDao.delete(id); 20 } 21 public void saveOrUpdate(Employee employee){ 22 employeeDao.saveOrUpdate(employee); 23 } 24 public List<Employee> getAll(){ 25 List<Employee> employees=employeeDao.getAll(); 26 /*employees.clear();*/ 27 System.out.println(employees.size()); 28以上是关于S2SH CRUD 整合的主要内容，如果未能解决你的问题，请参考以下文章
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