深入剖析原理！Hibernate實現CRUD（附專案原始碼
阿新 • • 發佈：2021-08-06
深入剖析原理！Hibernate實現CRUD（附專案原始碼
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### （2）主配置檔案hibernate.cfg.xml
<session-factory> <property name="hibernate.dialect">org.hibernate.dialect.OracleDialect</property> <property name="hibernate.connection.driverClass">oracle.jdbc.driver.OracleDriver</property> <property name="hibernate.connection.username">mine</property> <property name="hibernate.connection.password">mine</property> <property name="hibernate.connection.jdbcUrl">jdbc:oracle:thin:@127.0.0.1:1521:orcl</property> <property name="hibernate.show_sql">true</property> <property name="hibernate.hbm2ddl.auto">update</property> <mapping resource="com/ssh/entities/Department.hbm.xml"/> <mapping resource="com/ssh/entities/Employee.hbm.xml"/> </session-factory>
### applicationContext.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd"> <!-- 匯入資原始檔 --> <context:property-placeholder location="classpath:db.properties" ignore-unresolvable="true"/> <!-- 配置c3p0資料來源 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="user" value="${jdbc.username}"></property> <property name="password" value="${jdbc.password}"></property> <property name="driverClass" value="${jdbc.driverClass}"></property> <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property> <property name="initialPoolSize" value="${jdbc.initialPoolSize}"></property> <property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property> </bean> <!-- 定義Hibernate的SessionFactory LocalSessionFactoryBean--> <bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"> <!-- 依賴注入資料來源，注入上面定義的dataSource --> <property name="dataSource" ref="dataSource"/> <!-- mappingResouces屬性用來列出全部對映檔案 --> <property name="mappingResources"> <list> <!-- 以下用來列出Hibernate對映檔案 --> <value>com/ssh/entities/Department.hbm.xml</value> <value>com/ssh/entities/Employee.hbm.xml</value> <value>hibernate.cfg.xml</value> </list> </property> <!-- 定義Hibernate的SessionFactory的屬性 --> <property name="hibernateProperties"> <props> <!-- 指定資料庫方言 --> <prop key="hibernate.dialect"> org.hibernate.dialect.OracleDialect</prop> <!-- 是否根據需要每次自動建立資料庫 --> <prop key="hibernate.hbm2ddl.auto">update</prop> <!-- 顯示Hibernate持久化操作所生成的SQL --> <prop key="hibernate.show_sql">true</prop> <!-- 將SQL指令碼進行格式化後再輸出 --> <prop key="hibernate.format_sql">true</prop> </props> </property> </bean> <!-- 配置spring的宣告式事務 1.配置hibernate的事務管理器 --> <bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <tx:annotation-driven transaction-manager="transactionManager"/> <!-- <bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager"></bean> 2.配置事務屬性 <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="get" read-only="true"/> <tx:method name="*"/> </tx:attributes> </tx:advice> --> <!-- 3.配置事務切入點，再把事務屬性和事務切入點關聯起來 --> <!-- <aop:config> <aop:pointcut expression="execution(* com.guor.ssh.service.*.*(..))" id="txPointcut"/> <aop:advisor advice-ref="exAdvice" pointcut-ref="txPointcut"/> </aop:config> -->
### applicationContext-beans.xml?
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <bean id="employeeDao" class="com.ssh.dao.EmployeeDao"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <bean id="departmentDao" class="com.ssh.dao.DepartmentDao"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <bean id="employeeService" class="com.ssh.service.EmployeeService"> <property name="employeeDao" ref="employeeDao"></property> </bean> <bean id="departmentService" class="com.ssh.service.DepartmentService"> <property name="departmentDao" ref="departmentDao"></property> </bean> <bean id="employeeAction" class="com.ssh.actions.EmployeeAction" scope="prototype"> <property name="employeeService" ref="employeeService"></property> <property name="departmentService" ref="departmentService"></property> </bean>
### struts.xml?
<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="true" />
<package name="default" namespace="/" extends="struts-default">
<!-- 定義新的攔截器棧， 配置prepare攔截器棧的alwaysInvokePrepare引數值為false-->
<interceptors>
<interceptor-stack name="sshStack">
<interceptor-ref name="paramsPrepareParamsStack">
<param name="prepare.alwaysInvokePrepare">false</param>
</interceptor-ref>
</interceptor-stack>
</interceptors>
<!-- 使用新的攔截器棧-->
<default-interceptor-ref name="sshStack"></default-interceptor-ref>
<action name="emp-*" class="employeeAction" method="{1}">
<result name="list">/WEB-INF/views/emp-list.jsp</result>
<result type="stream" name="delete">
<param name="contentType">text/html</param>
<param name="inputName">inputStream</param>
</result>
<result name="input">/WEB-INF/views/emp-input.jsp</result>
<result name="success" type="redirect">/emp-list</result>
</action>
</package>
3、類檔案
-----
### EmployeeAction
package com.ssh.actions;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Map;
import org.apache.struts2.interceptor.RequestAware;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.opensymphony.xwork2.Preparable;
import com.ssh.entities.Employee;
import com.ssh.service.DepartmentService;
import com.ssh.service.EmployeeService;
public class EmployeeAction extends ActionSupport implements RequestAware,
ModelDriven
private static final long serialVersionUID = 1L;
private EmployeeService employeeService;
public void setEmployeeService(EmployeeService employeeService) {
this.employeeService = employeeService;
}
private DepartmentService departmentService;
public void setDepartmentService(DepartmentService departmentService) {
this.departmentService = departmentService;
}
public String list() {
request.put("employees",employeeService.getAll());
return "list";
}
private Integer id;
public void setId(Integer id) {
this.id = id;
}
public InputStream inputStream;
public InputStream getInputStream() {
return inputStream;
}
public String delete() {
try {
employeeService.delete(id);
inputStream = new ByteArrayInputStream("1".getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return SUCCESS;
}
public String input() {
request.put("departments", departmentService.getAll());
return INPUT;
}
public void prepareInput() {
if(id!=null) {
model = employeeService.get(id);
}
}
public String save() {
if(id == null) {
model.setCreateTime(new Date());
}
employeeService.saveOrUpdate(model);
System.out.println("model");
return SUCCESS;
}
public void prepareSave() {
if(id == null) {
model = new Employee();
}else {
model = employeeService.get(id);
}
}
private Map<String,Object> request;
@Override
public void setRequest(Map<String, Object> arg0) {
this.request = arg0;
}
@Override
public void prepare() throws Exception {}
private Employee model;
@Override
public Employee getModel() {
return model;
}
}
### EmployeeService
package com.ssh.service;
import java.util.List;
import com.ssh.dao.EmployeeDao;
import com.ssh.entities.Employee;
public class EmployeeService {
private EmployeeDao employeeDao;
public void setEmployeeDao(EmployeeDao employeeDao) {
this.employeeDao = employeeDao;
}
public void saveOrUpdate(Employee employee) {
employeeDao.saveOrUpdate(employee);
}
public void delete(Integer id) {
employeeDao.delete(id);
}
public List<Employee> getAll(){
List<Employee> employees = employeeDao.getAll();
return employees;
}
public Employee get(Integer id) {
return employeeDao.get(id);
}
}
### EmployeeDao?
package com.ssh.dao;
import java.util.List;
import com.ssh.entities.Employee;
public class EmployeeDao extends BaseDao{
public void delete(Integer id) {
String hql = "DELETE From Employee e where e.id=?0";
getSession().createQuery(hql).setParameter(0,id).executeUpdate();
}
public List<Employee> getAll() {
//String hql = "From Employee e LEFT OUTER JOIN FETCH e.department";
String hql = "From Employee";
return getSession().createQuery(hql).list();
}
public void saveOrUpdate(Employee employee) {
getSession().saveOrUpdate(employee);
}
public Employee get(Integer id) {
return (Employee)getSession().get(Employee.class,id);
}
}
### emp-list.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<h4>Employee List Page</h4>
<s:if test="#request.employees == null||#request.employees.size() == 0">
沒有任何員工資訊
</s:if>
<s:else>
<table border="1" cellpadding="10" cellspacing="0">
<tr>
<td>ID</td>
<td>LASTNAME</td>
<td>EMAIL</td>
<td>BIRTH</td>
<td>CREATETIME</td>
<td>delete</td>
<td>edit</td>
</tr>
<s:iterator value="#request.employees">
<tr>
<td>${id }</td>
<td>${lastName }</td>
<td>${email }</td>
<td>${birth }</td>
<td>${createTime }</td>
<td>
<a href="emp-delete?id=${id } " class="delete">Delete</a>
<input type="hidden" value="${lastName }"/>
</td>
<td><a href="emp-input?id=${id }">Edit</a></td>
</tr>
</s:iterator>
</table>
</s:else>
### emp-input.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<h4>Employee Input Page</h4>
總結
面試建議是，一定要自信，敢於表達，面試的時候我們對知識的掌握有時候很難面面俱到，把自己的思路說出來，而不是直接告訴面試官自己不懂，這也是可以加分的。
以上就是螞蟻技術四面和HR面試題目，以下最新總結的最全，範圍包含最全MySQL、Spring、Redis、JVM等最全面試題和答案，僅用於參考