mvc crud
学习从HelloWorld应用程序开始的任何Web框架都是一个好主意。 一旦我们熟悉了框架配置，最好做一个CRUD（创建，读取，更新，删除）应用程序，该应用程序涵盖Web框架的各个方面，例如验证，请求URL映射，请求参数绑定，预填充表单等。 。
现在，我将解释如何使用Spring MVC3，Hibernate和MySQL编写一个简单的CRUD应用程序。 我们的应用程序是ContactsManagements，您可以在其中查看或搜索联系人，创建新联系人，编辑或删除现有联系人。
步骤＃1：创建联系人表
CREATE TABLE CONTACTS
(id int(10) unsigned NOT NULL AUTO_INCREMENT,name varchar(45) NOT NULL,address varchar(45) DEFAULT NULL,gender char(1) DEFAULT 'M',dob datetime DEFAULT NULL,email varchar(45) DEFAULT NULL,mobile varchar(15) DEFAULT NULL,phone varchar(15) DEFAULT NULL,PRIMARY KEY (id)
);步骤2：将SpringMVC，Hibernate及其从属jar复制到WEB-INF / lib文件夹中。 如果您使用的是Maven，则可以提及以下依赖项。
<dependencies><dependency><groupid>junit</groupid><artifactid>junit</artifactid><version>4.8.1</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>org.springframework</groupid><artifactid>spring-web</artifactid><version>3.0.5.RELEASE</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>org.springframework</groupid><artifactid>spring-core</artifactid><version>3.0.5.RELEASE</version><type>jar</type><scope>compile</scope><exclusions><exclusion><artifactid>commons-logging</artifactid><groupid>commons-logging</groupid></exclusion></exclusions></dependency><dependency><groupid>log4j</groupid><artifactid>log4j</artifactid><version>1.2.14</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>org.springframework</groupid><artifactid>spring-tx</artifactid><version>3.0.5.RELEASE</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>jstl</groupid><artifactid>jstl</artifactid><version>1.1.2</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>taglibs</groupid><artifactid>standard</artifactid><version>1.1.2</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>org.springframework</groupid><artifactid>spring-webmvc</artifactid><version>3.0.5.RELEASE</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>org.springframework</groupid><artifactid>spring-aop</artifactid><version>3.0.5.RELEASE</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>commons-digester</groupid><artifactid>commons-digester</artifactid><version>2.1</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>commons-collections</groupid><artifactid>commons-collections</artifactid><version>3.2.1</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>org.hibernate</groupid><artifactid>hibernate-core</artifactid><version>3.3.2.GA</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>javax.persistence</groupid><artifactid>persistence-api</artifactid><version>1.0</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>c3p0</groupid><artifactid>c3p0</artifactid><version>0.9.1.2</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>org.springframework</groupid><artifactid>spring-orm</artifactid><version>3.0.5.RELEASE</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>org.slf4j</groupid><artifactid>slf4j-api</artifactid><version>1.6.1</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>org.slf4j</groupid><artifactid>slf4j-log4j12</artifactid><version>1.6.1</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>cglib</groupid><artifactid>cglib-nodep</artifactid><version>2.2</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>org.hibernate</groupid><artifactid>hibernate-annotations</artifactid><version>3.4.0.GA</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>jboss</groupid><artifactid>javassist</artifactid><version>3.7.ga</version><type>jar</type><scope>compile</scope></dependency><dependency><groupid>mysql</groupid><artifactid>mysql-connector-java</artifactid><version>5.1.14</version><type>jar</type><scope>compile</scope></dependency></dependencies>步骤＃3：配置SpringMVC
a）在web.xml中配置DispatcherServlet
<servlet><servlet-name>dispatcher</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>dispatcher</servlet-name><url-pattern>*.do</url-pattern></servlet-mapping><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value></context-param>b）在WEB-INF / dispatcher-servlet.xml中配置View Resolver
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/jsp/" p:suffix=".jsp">
</bean>c）在WEB-INF / classes / applicationContext.xml中配置注释支持，PropertyPlaceHolderConfigurer，ResourceBundleMessageSource
<context:annotation-config></context:annotation-config><context:component-scan base-package="com.sivalabs"></context:component-scan><mvc:annotation-driven> </mvc:annotation-driven><context:property-placeholder location="classpath:config.properties"></context:property-placeholder><bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource" p:basename="Messages"></bean>步骤＃4：在config.properties中配置JDBC连接参数和Hibernate属性
################### JDBC Configuration ##########################
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/sivalabs
jdbc.username=root
jdbc.password=admin################### Hibernate Configuration ##########################
hibernate.dialect=org.hibernate.dialect.MySQLDialect
hibernate.show_sql=true
#hibernate.hbm2ddl.auto=update
hibernate.generate_statistics=true步骤5：在WEB-INF / classes / applicationContext.xml中配置数据源，SessionFactory，TransactionManagement支持
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource" p:driverclassname="${jdbc.driverClassName}" p:url="${jdbc.url}" p:username="${jdbc.username}" p:password="${jdbc.password}">
</bean> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"><property name="dataSource" ref="dataSource"></property><property name="hibernateProperties"><props> <prop key="hibernate.dialect">${hibernate.dialect}</prop> <prop key="hibernate.show_sql">${hibernate.show_sql}</prop></props></property><property name="packagesToScan" value="com.sivalabs"></property>
</bean><bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" p:sessionfactory-ref="sessionFactory">
</bean><tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>步骤＃6：在WEB-INF / classes / Messages.properties中配置标签和错误消息
App.Title=SivaLabs
typeMismatch.java.util.Date={0} is Invalid Date.
dob=DOB步骤＃7：创建实体类Contact.java
package com.sivalabs.contacts;import java.util.Date;import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;import org.apache.commons.lang.builder.ToStringBuilder;@Entity
@Table(name="CONTACTS")
public class Contact
{@Id@GeneratedValue(strategy = GenerationType.AUTO)private int id;@Column private String name;@Column private String address;@Column private String gender;@Column private Date dob;@Column private String email;@Column private String mobile;@Column private String phone;@Overridepublic String toString(){return ToStringBuilder.reflectionToString(this);}//setters & getters
}步骤＃8：创建在CONTACTS表上执行CRUD操作的ContactsDAO.java。
package com.sivalabs.contacts;import java.util.List;import org.hibernate.Criteria;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Restrictions;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;@Repository
@Transactional
public class ContactsDAO
{@Autowiredprivate SessionFactory sessionFactory;public Contact getById(int id){return (Contact) sessionFactory.getCurrentSession().get(Contact.class, id);}@SuppressWarnings("unchecked")public List searchContacts(String name){Criteria criteria = sessionFactory.getCurrentSession().createCriteria(Contact.class);criteria.add(Restrictions.ilike("name", name+"%"));return criteria.list();}@SuppressWarnings("unchecked")public List getAllContacts(){Criteria criteria = sessionFactory.getCurrentSession().createCriteria(Contact.class);return criteria.list();}public int save(Contact contact){return (Integer) sessionFactory.getCurrentSession().save(contact);}public void update(Contact contact){sessionFactory.getCurrentSession().merge(contact);}public void delete(int id){Contact c = getById(id);sessionFactory.getCurrentSession().delete(c);}
}步骤＃9：创建ContactFormValidator.java，它在保存/更新联系人时执行验证。
package com.sivalabs.contacts;import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;@Component("contactFormValidator")
public class ContactFormValidator implements Validator
{@SuppressWarnings("unchecked")@Overridepublic boolean supports(Class clazz){return Contact.class.isAssignableFrom(clazz);}@Overridepublic void validate(Object model, Errors errors){ValidationUtils.rejectIfEmptyOrWhitespace(errors, "name","required.name", "Name is required.");}
}步骤＃10：创建处理所有CRUD请求的ContactsControllers.java。
package com.sivalabs.contacts;import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.support.SessionStatus;
import org.springframework.web.servlet.ModelAndView;@Controller
public class ContactsControllers
{@Autowiredprivate ContactsDAO contactsDAO;@Autowiredprivate ContactFormValidator validator;@InitBinderpublic void initBinder(WebDataBinder binder){SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");dateFormat.setLenient(false);binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true));}@RequestMapping("/searchContacts")public ModelAndView searchContacts(@RequestParam(required= false, defaultValue="") String name){ModelAndView mav = new ModelAndView("showContacts");List contacts = contactsDAO.searchContacts(name.trim());mav.addObject("SEARCH_CONTACTS_RESULTS_KEY", contacts);return mav;}@RequestMapping("/viewAllContacts")public ModelAndView getAllContacts(){ModelAndView mav = new ModelAndView("showContacts");List contacts = contactsDAO.getAllContacts();mav.addObject("SEARCH_CONTACTS_RESULTS_KEY", contacts);return mav;}@RequestMapping(value="/saveContact", method=RequestMethod.GET)public ModelAndView newuserForm(){ModelAndView mav = new ModelAndView("newContact");Contact contact = new Contact();mav.getModelMap().put("newContact", contact);return mav;}@RequestMapping(value="/saveContact", method=RequestMethod.POST)public String create(@ModelAttribute("newContact")Contact contact, BindingResult result, SessionStatus status){validator.validate(contact, result);if (result.hasErrors()){ return "newContact";}contactsDAO.save(contact);status.setComplete();return "redirect:viewAllContacts.do";}@RequestMapping(value="/updateContact", method=RequestMethod.GET)public ModelAndView edit(@RequestParam("id")Integer id){ModelAndView mav = new ModelAndView("editContact");Contact contact = contactsDAO.getById(id);mav.addObject("editContact", contact);return mav;}@RequestMapping(value="/updateContact", method=RequestMethod.POST)public String update(@ModelAttribute("editContact") Contact contact, BindingResult result, SessionStatus status){validator.validate(contact, result);if (result.hasErrors()) {return "editContact";}contactsDAO.update(contact);status.setComplete();return "redirect:viewAllContacts.do";}@RequestMapping("deleteContact")public ModelAndView delete(@RequestParam("id")Integer id){ModelAndView mav = new ModelAndView("redirect:viewAllContacts.do");contactsDAO.delete(id);return mav;}
}步骤＃11：与其在所有JSP中编写JSTL标记库描述，不如在一个JSP中声明它们并将其包含在其他JSP中。
taglib_includes.jsp
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%><%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%@taglib uri="http://www.springframework.org/tags" prefix="spring"%>步骤＃12：创建JSP。
a）showContacts.jsp
<%@include file="taglib_includes.jsp" %><html>
<head><title><spring:message code="App.Title"></spring:message> </title>
<script type="text/javascript" src="js/contacts.js"></script>
</head>
<body style="font-family: Arial; font-size:smaller;"><center><form action="searchContacts.do" method="post"><table style="border-collapse: collapse;" width="500" border="0" bordercolor="#006699"><tbody><tr> <td>Enter Contact Name</td> <td><input name="name" type="text"><input value="Search" type="submit"><input value="New Contact" onclick="javascript:go('saveContact.do');" type="button"></td></tr>
</tbody></table></form><c:if test="${empty SEARCH_CONTACTS_RESULTS_KEY}">
</c:if><c:if test="${! empty SEARCH_CONTACTS_RESULTS_KEY}"> <c:foreach var="contact" items="${SEARCH_CONTACTS_RESULTS_KEY}">
</c:foreach></c:if><table style="border-collapse: collapse;" width="500" border="1" bordercolor="#006699"><tbody><tr bgcolor="lightblue"> <th>Id</th> <th>Name</th> <th>Address</th> <th>Mobile</th> <th></th> </tr>
<tr> <td colspan="4">No Results found</td> </tr><tr> <td><c:out value="${contact.id}"></c:out></td> <td><c:out value="${contact.name}"></c:out></td> <td><c:out value="${contact.address}"></c:out> </td> <td><c:out value="${contact.mobile}"></c:out></td> <td><a href="updateContact.do?id=$%7Bcontact.id%7D">Edit</a><a href="javascript:deleteContact('deleteContact.do?id=${contact.id}');">Delete</a></td> </tr></tbody></table></center></body>
</html>b）newContact.jsp
<%@include file="taglib_includes.jsp" %><html>
<head><script type="text/javascript" src="js/contacts.js"></script><title><spring:message code="App.Title"></spring:message> </title>
</head>
<body style="font-family: Arial; font-size:smaller;"><table style="border-collapse: collapse;" width="750" align="center" bgcolor="lightblue" border="1" bordercolor="#006699" height="500"><tbody><tr> <td align="center"><h3>Edit Contact Form</h3></td> </tr>
<tr valign="top" align="center"> <td align="center"><form:form action="saveContact.do" method="post" commandname="newContact"><table style="border-collapse: collapse;" width="500" border="0" bordercolor="#006699" cellpadding="2" cellspacing="2"><tbody><tr> <td width="100" align="right">Name</td> <td width="150"><form:input path="name"></form:input></td> <td align="left"><form:errors path="name" cssstyle="color:red"></form:errors></td> </tr>
<tr> <td width="100" align="right">DOB</td> <td><form:input path="dob"></form:input></td> <td align="left"><form:errors path="dob" cssstyle="color:red"></form:errors></td> </tr>
<tr> <td width="100" align="right">Gender</td> <td> <form:select path="gender"><form:option value="M" label="Male"><form:option value="F" label="Female"></form:option></form:option></form:select></td> <td></td> </tr>
<tr> <td width="100" align="right">Address</td> <td><form:input path="address"></form:input></td> <td align="left"><form:errors path="address" cssstyle="color:red"></form:errors></td> </tr>
<tr> <td width="100" align="right">Email</td> <td><form:input path="email"></form:input></td> <td align="left"><form:errors path="email" cssstyle="color:red"></form:errors></td> </tr>
<tr> <td width="100" align="right">Mobile</td> <td><form:input path="mobile"></form:input></td> <td align="left"><form:errors path="mobile" cssstyle="color:red"></form:errors></td> </tr>
<tr> <td colspan="3" align="center"><input name="" value="Save" type="submit"><input name="" value="Reset" type="reset"><input value="Back" onclick="javascript:go('viewAllContacts.do');" type="button"></td> </tr>
</tbody></table></form:form></td> </tr>
</tbody></table></body>
</html>a）editContact.jsp
<%@include file="taglib_includes.jsp" %><html>
<head><script type="text/javascript" src="js/contacts.js"></script><title><spring:message code="App.Title"></spring:message> </title>
</head>
<body style="font-family: Arial; font-size:smaller;"><table style="border-collapse: collapse;" width="750" align="center" bgcolor="lightblue" border="1" bordercolor="#006699" height="500"><tbody><tr> <td align="center"><h3>Edit Contact Form</h3></td> </tr>
<tr valign="top" align="center"> <td align="center"><form:form action="updateContact.do" method="post" commandname="editContact"><table style="border-collapse: collapse;" width="500" border="0" bordercolor="#006699" cellpadding="2" cellspacing="2"><tbody><tr> <td width="100" align="right">Id</td> <td width="150"><form:input path="id" readonly="true"></form:input></td> <td align="left"><form:errors path="id" cssstyle="color:red"></form:errors></td> </tr>
<tr> <td width="100" align="right">Name</td> <td><form:input path="name"></form:input></td> <td align="left"><form:errors path="name" cssstyle="color:red"></form:errors></td> </tr>
<tr> <td width="100" align="right">DOB</td> <td><form:input path="dob"></form:input></td> <td align="left"><form:errors path="dob" cssstyle="color:red"></form:errors></td> </tr>
<tr> <td width="100" align="right">Gender</td> <td> <form:select path="gender"><form:option value="M" label="Male"><form:option value="F" label="Female"></form:option></form:option></form:select></td> <td></td> </tr>
<tr> <td width="100" align="right">Address</td> <td><form:input path="address"></form:input></td> <td align="left"><form:errors path="address" cssstyle="color:red"></form:errors></td> </tr>
<tr> <td width="100" align="right">Email</td> <td><form:input path="email"></form:input></td> <td align="left"><form:errors path="email" cssstyle="color:red"></form:errors></td> </tr>
<tr> <td width="100" align="right">Mobile</td> <td><form:input path="mobile"></form:input></td> <td align="left"><form:errors path="mobile" cssstyle="color:red"></form:errors></td> </tr>
<tr valign="bottom"> <td colspan="3" align="center"><input value="Delete" onclick="javascript:deleteContact('deleteContact.do?id=${editContact.id}');" type="button"><input name="" value="Save" type="submit"> <input value="Back" onclick="javascript:go('viewAllContacts.do');" type="button"></td> </tr>
</tbody></table></form:form></td> </tr>
</tbody></table></body>
</html>步骤＃13：编写包含实用程序方法的javascript文件js / contacts.js
function go(url)
{window.location = url;
}function deleteContact(url)
{var isOK = confirm("Are you sure to delete?");if(isOK){go(url);}
}步骤＃14：欢迎文件index.jsp
<%
response.sendRedirect("viewAllContacts.do");
%>步骤＃15：启动服务器，然后将浏览器URL指向http：// localhost：8080 / SpringMVCHibernate
参考：来自我们SivaLabs的 JCG合作伙伴 Siva的Spring MVC3 Hibernate CRUD示例应用程序 。
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翻译自: https://www.javacodegeeks.com/2011/04/spring-mvc3-hibernate-crud-sample.html
mvc crud
