跟开涛学SpringMVC（10）：Controller接口控制器详解（7完）

package org.springframework.validation; public interface Errors {   //=========================全局错误消息（验证/绑定对象全局的）=============================   //注册一个全局的错误码（）   void reject(String errorCode);   //注册一个全局的错误码，当根据errorCode没有找到相应错误消息时，使用defaultMessage作为错误消息   void reject(String errorCode, String defaultMessage);   //注册一个全局的错误码，当根据errorCode没有找到相应错误消息时（带错误参数的），使用defaultMessage作为错误消息   void reject(String errorCode, Object[] errorArgs, String defaultMessage);   //=========================全局错误消息（验证/绑定整个对象的）=============================   //=========================局部错误消息（验证/绑定对象字段的）=============================   //注册一个对象字段的错误码，field指定验证失败的字段名   void rejectValue(String field, String errorCode);   void rejectValue(String field, String errorCode, String defaultMessage);   void rejectValue(String field, String errorCode, Object[] errorArgs, String defaultMessage);   //=========================局部错误消息（验证/绑定对象字段的）=============================   boolean hasErrors();      ////是否有错误   boolean hasGlobalErrors(); //是否有全局错误   boolean hasFieldErrors();  //是否有字段错误   Object getFieldValue(String field); //返回当前验证通过的值，或验证失败时失败的值； }

package cn.javass.chapter4.web.controller; //省略import public class ErrorController extends AbstractCommandController {        public ErrorController() {               setCommandClass(DataBinderTestModel.class);               setCommandName("command");        }        @Override        protected ModelAndView handle(HttpServletRequest req, HttpServletResponse resp, Object command, BindException errors) throws Exception {                  //表示用户名不为空               errors.reject("username.not.empty");               //带有默认错误消息               errors.reject("username.not.empty1", "用户名不能为空1");               //带有参数和默认错误消息                       errors.reject("username.length.error", new Object[]{5, 10});                //得到错误相关的模型数据               Map model = errors.getModel();               return new ModelAndView("bindAndValidate/error", model);        } }

<bean id="messageSource"        class="org.springframework.context.support.ReloadableResourceBundleMessageSource">     <property name="basename" value="classpath:messages"/>     <property name="fileEncodings" value="utf-8"/>     <property name="cacheSeconds" value="120"/> </bean>  <bean name="/error" class="cn.javass.chapter4.web.controller.ErrorController"/>

username.not.empty=用户名不能为空 username.length.error=用户名长度不合法，长度必须在{0}到{1}之间

<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <!-- 表单的默认命令对象名为command --> <form:form commandName="command">     <form:errors path="*"></form:errors> </form:form>

package cn.javass.chapter4.web.controller; //省略import public class DataBinderErrorTestController extends SimpleFormController {        public DataBinderErrorTestController() {               setCommandClass(DataBinderTestModel.class);               setCommandName("dataBinderTest");        }        @Override        protected ModelAndView showForm(HttpServletRequest request, HttpServletResponse response, BindException errors) throws Exception {               //如果表单提交有任何错误都会再回到表单展示页面               System.out.println(errors);               return super.showForm(request, response, errors);        }        @Override        protected void doSubmitAction(Object command) throws Exception {               System.out.println(command); //表单提交成功（数据绑定成功）进行功能处理     }        @Override        protected void initBinder(HttpServletRequest request, ServletRequestDataBinder binder) throws Exception {               super.initBinder(request, binder);               //注册自定义的属性编辑器               //1、日期               DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");               CustomDateEditor dateEditor = new CustomDateEditor(df, true);               //表示如果命令对象有Date类型的属性，将使用该属性编辑器进行类型转换               binder.registerCustomEditor(Date.class, dateEditor);                //自定义的电话号码编辑器               binder.registerCustomEditor(PhoneNumberModel.class, new PhoneNumberEditor());        } }

<bean name="/dataBindError" class="cn.javass.chapter4.web.controller.DataBinderErrorTestController">    <property name="formView" value="bindAndValidate/input"/>    <property name="successView" value="bindAndValidate/success"/> </bean>

<%@ page language="java" contentType="text/html; charset=UTF-8"   pageEncoding="UTF-8"%> <%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <!-- 表单的命令对象名为dataBinderTest --> <form:form commandName="dataBinderTest">     <form:errors path="*" cssStyle="color:red"></form:errors><br/><br/>     bool:<form:input path="bool"/><br/>     phoneNumber:<form:input path="phoneNumber"/><br/>     date:<form:input path="date"/><br/>     <input type="submit" value="提交"/> </form:form>

org.springframework.validation.BindException: org.springframework.validation.BeanPropertyBindingResult: 3 errors  Field error in object 'dataBinderTest' on field 'bool': rejected value [www]; codes [typeMismatch.dataBinderTest.bool,typeMismatch.bool,typeMismatch.boolean,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [dataBinderTest.bool,bool]; arguments []; default message [bool]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'boolean' for property 'bool'; nested exception is java.lang.IllegalArgumentException: Invalid boolean value [www]]  Field error in object 'dataBinderTest' on field 'date': rejected value [123]; codes [typeMismatch.dataBinderTest.date,typeMismatch.date,typeMismatch.java.util.Date,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [dataBinderTest.date,date]; arguments []; default message [date]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'java.util.Date' for property 'date'; nested exception is java.lang.IllegalArgumentException: Could not parse date: Unparseable date: "123"]  Field error in object 'dataBinderTest' on field 'phoneNumber': rejected value [123]; codes [typeMismatch.dataBinderTest.phoneNumber,typeMismatch.phoneNumber,typeMismatch.cn.javass.chapter4.model.PhoneNumberModel,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [dataBinderTest.phoneNumber,phoneNumber]; arguments []; default message [phoneNumber]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'cn.javass.chapter4.model.PhoneNumberModel' for property 'phoneNumber'; nested exception is java.lang.IllegalArgumentException: 类型转换失败，需要格式[010-12345678]，但格式是[123]]

typeMismatch.dataBinderTest.date=您输入的数据格式错误，请重新输入（格式：2012-03-19 22:17:17） #typeMismatch.date=2 #typeMismatch.java.util.Date=3 #typeMismatch=4

package org.springframework.validation; public interface Validator { boolean supports(Class<?> clazz); void validate(Object target, Errors errors); }

package cn.javass.chapter4.web.controller.support.validator; //省略import public class UserModelValidator implements Validator {     private static final Pattern USERNAME_PATTERN = Pattern.compile("[a-zA-Z]//w{4,19}");     private static final Pattern PASSWORD_PATTERN = Pattern.compile("[a-zA-Z0-9]{5,20}");     private static final Set<String> FORBINDDDEN_WORD_SET = new HashSet<String>();     static {        FORBINDDDEN_WORD_SET.add("fuc k"); //删掉空格        FORBINDDDEN_WORD_SET.add("admin");     }       @Override     public boolean supports(Class<?> clazz) {        return UserModel.class == clazz;//表示只对UserModel类型的目标对象实施验证     }     @Override     public void validate(Object target, Errors errors) {        //这个表示如果目标对象的username属性为空，则表示错误（简化我们手工判断是否为空）        ValidationUtils.rejectIfEmpty(errors, "username", "username.not.empty");         UserModel user = (UserModel) target;         if(!USERNAME_PATTERN.matcher(user.getUsername()).matches()) {            errors.rejectValue("username", "username.not.illegal");//如果用户名不合法        }         for(String forbiddenWord : FORBINDDDEN_WORD_SET) {            if(user.getUsername().contains(forbiddenWord)) {               errors.rejectValue("username", "username.forbidden", new Object[]{forbiddenWord}, "您的用户名包含非法关键词");//用户名包含屏蔽关键字               break;            }        }        if(!PASSWORD_PATTERN.matcher(user.getPassword()).matches()) {            errors.rejectValue("password","password.not.illegal", "密码不合法");//密码不合法        }       } }

<bean id="userModelValidator" class="cn.javass.chapter4.web.controller.support.validator.UserModelValidator"/> <bean name="/validator" class="cn.javass.chapter4.web.controller.RegisterSimpleFormController">     <property name="formView" value="registerAndValidator"/>     <property name="successView" value="redirect:/success"/>     <property name="validator" ref="userModelValidator"/> </bean>

username.not.empty=用户名不能为空 username.not.illegal=用户名错误，必须以字母开头，只能出现字母、数字、下划线，并且长度在5-20之间 username.forbidden=用户名中包含非法关键词【{0}】 password.not.illegal=密码长度必须在5-20之间

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <form:form commandName="user">  <form:errors path="*" cssStyle="color:red"></form:errors><br/>  username:<form:input path="username"/> <form:errors path="username" cssStyle="color:red"></form:errors> <br/>  password:<form:password path="password"/> <form:errors path="password" cssStyle="color:red"></form:errors> <br/> <input type="submit" value="注册"/> </form:form>

BindException errors = new BindException(user, getCommandName(user)); //如果用户名为空 if(!StringUtils.hasLength(user.getUsername())) {     errors.rejectValue("username", "username.not.empty"); } if(errors.hasErrors()) {     return new ModelAndView(getCreateView()).addAllObjects(errors.getModel()); }