构建基于maven的综合项目(二)--验证表单、实体关系
一、添加表单验证
1、页面，导入form标签，form上添加modelAttribute属性，信息提示用form:errors标签，对应model属性或boolean方法

……<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>……<form:form modelAttribute="addUserModel" action="addUser.do" method="post">……<td><spring:message code="message.user.userName"/></td><td><input id="userName" name="userName" type="text" value="${addUserModel.userName }"/></td><td>    <div><form:errors path="userName"/></div></td>……<div><form:errors path="rePassWord"/></div><div><form:errors path="passWordValid"/></div>……</form:form>

2、和页面对应的model类

package com.cpkf.notpad.controller.account.model;import javax.validation.constraints.AssertTrue;import javax.validation.constraints.Pattern;import javax.validation.constraints.Size;import org.apache.commons.lang.StringUtils;import org.hibernate.validator.constraints.*;import com.cpkf.notpad.commons.constants.RegexConstants;/**   * Filename:    AddUserModel.java * Description: 与页面表单对应的模型对象，在控制器里以 * @Valid @ModelAttribute("addUserModel") AddUserModel addUserModel * 参数形式出现，绑定表单输入数据 * 在根目录中创建校验提示信息的配置文件 ValidationMessages.properties进行国际化配置 * 这种校验方式局限性大，hibernate本身提供的校验器较少，还必须放在根目录 * Company:      * @author:     Jiang.hu * @version:    1.0 * Create at:   May 16, 2011 3:06:45 PM * modified:     */public class AddUserModel {//@NotEmpty(message="{account.error.userName.required}")private String userName;private String nickname;//@NotEmpty(message="{account.error.email.required}")//@Email(message="{account.error.email.invalid}")private String email;//@Size(min=6,max=12,message="{account.error.passWord.size}")private String passWord;private String rePassWord;private String gender;private String userProvince;private String userCity;private String birthday;//@Pattern(regexp=RegexConstants.PHONE_REGEX,message="{account.error.phone.invalid}")private String phone;private String registTime;//@AssertTrue(message="{account.error.passWord.confirm}")public boolean isPassWordValid(){if(StringUtils.isNotBlank(passWord) && StringUtils.isNotBlank(rePassWord)){return passWord.equals(rePassWord);}return false;}……}

3、控制器

@RequestMapping(value="/addUser.do",method={RequestMethod.GET,RequestMethod.POST})public String addUser(HttpServletRequest request,HttpServletResponse response,@Valid @ModelAttribute("addUserModel") AddUserModel addUserModel,BindingResult errors,Model model){                //使用注解方式局限大，故而自定义校验器，使用自定义国际化文件UserValidator userValidator = new UserValidator();userValidator.addUserValidator(addUserModel, errors);model.addAttribute("addUserModel", addUserModel);if(errors.hasErrors()){logger.info("The parameter is invalid");return "addUser";}return "index";}

4、校验器

package com.cpkf.notpad.controller.account.validator;import org.apache.commons.lang.StringUtils;import org.springframework.validation.BindingResult;import com.cpkf.notpad.commons.constants.RegexConstants;import com.cpkf.notpad.controller.account.model.AddUserModel;public class UserValidator {public void addUserValidator(Object model,BindingResult errors){AddUserModel addUserModel = (AddUserModel) model;if(StringUtils.isBlank(addUserModel.getUserName())){//参数1-对应的字段名，参数2-国际化文件中对应的key值，参数三-没有找到key时默认的提示信息errors.rejectValue("userName","account.error.userName.required","userName is required.");}if(StringUtils.isBlank(addUserModel.getEmail())){errors.rejectValue("email", "account.error.email.required", "email is required.");}if(StringUtils.isNotBlank(addUserModel.getEmail()) && !addUserModel.getEmail().matches(RegexConstants.EMAIL_REGEX)){errors.rejectValue("email", "account.error.email.invalid", "email is invalid.");}if(addUserModel.getPassWord().trim().length() < 6 || addUserModel.getPassWord().trim().length() > 12){errors.rejectValue("passWord", "account.error.passWord.size", "password must be between 6-12.");}if(addUserModel.getRePassWord().trim().length() < 6 || addUserModel.getRePassWord().trim().length() > 12){errors.rejectValue("rePassWord", "account.error.passWord.size", "password must be between 6-12.");}if(StringUtils.isNotBlank(addUserModel.getRePassWord()) && !addUserModel.getPassWord().equals(addUserModel.getRePassWord())){errors.rejectValue("rePassWord", "account.error.passWord.confirm", "enter the password twice inconsistent.");}if(StringUtils.isNotBlank(addUserModel.getPhone()) && !addUserModel.getPhone().matches(RegexConstants.PHONE_REGEX)){errors.rejectValue("phone", "account.error.phone.invalid", "phone is invalid.");}}}

二、创建hibernate实体类关系
1、account

package com.cpkf.notpad.entity;import java.util.HashSet;import java.util.Set;import javax.persistence.*;/**   * Filename:    Account.java * Description: account实体类 * Company:      * @author:      * @version:    1.0 * Create at:   May 10, 2011 1:44:50 PM * modified:     */@Entity@Table(name="account")public class Account {/** * @Id：该类中独特标志 * @Column：对应表中的列 * @GeneratedValue：主键生成策略-自增长 */@Id@Column(name="account_id")@GeneratedValue(strategy=GenerationType.IDENTITY)private Long accountId;@Column(name="email")private String email;@Column(name="passWord")private String passWord;@Column(name="status")private Boolean status;//多对多单向，并指定中间表的表明和字段名,中间表自动生成联合组建//fetch加载方式EAGER-即时加载，LAZY-延迟加载@ManyToMany(fetch=FetchType.EAGER)@JoinTable(name="account_role",joinColumns={@JoinColumn(name="account_id",referencedColumnName="account_id")},inverseJoinColumns={@JoinColumn(name="role_id",referencedColumnName="role_id")})private Set<Role> roles = new HashSet<Role>();//cascade-联级操作，eg：删除account同时删除user//unique-外键的唯一性@OneToOne(cascade=CascadeType.ALL,fetch=FetchType.EAGER)@JoinColumn(name="user_id",unique=true)private User user;……}

2、role

package com.cpkf.notpad.entity;import java.util.HashSet;import java.util.Set;import javax.persistence.*;/**   * Filename:    Role.java * Description: 角色类 * Company:      * @author:     Jiang.hu * @version:    1.0 * Create at:   May 19, 2011 4:13:53 PM * modified:     */@Entity@Table(name="role")public class Role {@Id@Column(name="role_id")@GeneratedValue(strategy=GenerationType.IDENTITY)private Long roleId;@Column(name="roleName")private String RoleName;@Column(name="description")private String description;@Column(name="status")private Boolean status;//多对多双向@ManyToMany(fetch=FetchType.EAGER)@JoinTable(name="role_resource",joinColumns={@JoinColumn(name="role_id",referencedColumnName="role_id")},inverseJoinColumns={@JoinColumn(name="resource_id",referencedColumnName="resource_id")})private Set<Resource> resources = new HashSet<Resource>();……}

3、resource

package com.cpkf.notpad.entity;import java.util.HashSet;import java.util.Set;import javax.persistence.*;/**   * Filename:    Resource.java * Description: 资源类 * Company:      * @author:     Jiang.hu * @version:    1.0 * Create at:   May 19, 2011 4:09:41 PM * modified:     */@Entity@Table(name="resource")public class Resource {@Id@Column(name="resource_id")@GeneratedValue(strategy=GenerationType.IDENTITY)private Long resourceId;@Column(name="resourceName")private String resourceName;@Column(name="url")private String url;@ManyToMany(mappedBy="resources",fetch=FetchType.EAGER)private Set<Role> roles = new HashSet<Role>();……}

4、其余类大同小异，创建好实体类后，启动程序，会自动创建相应表格