目录
一、Student类：
二、student.jsp(在webapp下)
三、StudentController类
四、启动tomcat
1.”/”形式
2.“-”形式
3.“\”形式
五、解决
1.第一种方式@DateTimeFormat注解
(1)在实体类的birthday上加@DateTimeFormat注解
(2)同时在spring-mvc.xml里配置spring开启注解mvc的支持
(3)重新启动tomcat
2.第二种方式：用自定义类型转换器
(1)先把Studeunt类birthday上的注解去掉
(2)建一个StringToDate类：
(3)spring-mvc.xml里配置日期类型转换器
(4)重新启动tomcat：
六、怎么让控制台输出的是自己输入的格式？
1.最简单的方式：在输出语句那用SimpleDateFormat对象
StudentController类里：
运行：
控制台：
2.实体类的日期上加两个注解(@DateTimeFormat和@JsonFormat)
(1)使用@JsonFormat注解先导入依赖
(2)实体类：
(3)spring-mvc.xml里配置spring开启注解mvc的支持
一、Student类：
import java.util.Date;public class Student {private String stuName;private Integer age;private Date birthday;public Student() {}public Student(String stuName, Integer age, Date birthday) {this.stuName = stuName;this.age = age;this.birthday = birthday;}public String getStuName() {return stuName;}public void setStuName(String stuName) {this.stuName = stuName;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}@Overridepublic String toString() {return "Student{" +"stuName='" + stuName + '\'' +", age=" + age +", birthday=" + birthday +'}';}}二、student.jsp(在webapp下)
<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head><title>Title</title></head><body><form action="stu/student.do" method="post">姓名：<input type="text" name="stuName" /><br/>年龄：<input type="text" name="age" /><br/>生日：<input type="text" name="birthday" /><br/><input type="submit" value="提交" /></form></body></html>三、StudentController类
import com.qcby.pojo.Student;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;@Controller@RequestMapping("/stu")public class StudentController {@RequestMapping("/student.do")public String studentSave(Student student){System.out.println(student);return "success";}}四、启动tomcat
1.”/”形式
2.“-”形式
3.“\”形式
五、解决
1.第一种方式@DateTimeFormat注解
(1)在实体类的birthday上加@DateTimeFormat注解
import org.springframework.format.annotation.DateTimeFormat;import java.util.Date;public class Student {private String stuName;private Integer age;//这是"-"形式的,想要别的形式就去改@DateTimeFormat(pattern = "yyyy-MM-dd") //这里还可以加上时分秒：yyyy-MM-dd HH:mm:ssprivate Date birthday;public Student() {}public Student(String stuName, Integer age, Date birthday) {this.stuName = stuName;this.age = age;this.birthday = birthday;}public String getStuName() {return stuName;}public void setStuName(String stuName) {this.stuName = stuName;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}@Overridepublic String toString() {return "Student{" +"stuName='" + stuName + '\'' +", age=" + age +", birthday=" + birthday +'}';}}(2)同时在spring-mvc.xml里配置spring开启注解mvc的支持
<!-- 配置spring开启注解mvc的支持--><mvc:annotation-driven></mvc:annotation-driven>(3)重新启动tomcat
2.第二种方式：用自定义类型转换器
(1)先把Studeunt类birthday上的注解去掉
(2)建一个StringToDate类：
import org.springframework.core.convert.converter.Converter;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;public class StringToDate implements Converter<String, Date> {@Overridepublic Date convert(String s) {//判断if(s==null){throw new RuntimeException("请您输入日期");}//进行转换SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");try {//进行转换return simpleDateFormat.parse(s);} catch (ParseException e) {throw new RuntimeException(e);}}}(3)spring-mvc.xml里配置日期类型转换器
但是这是自己写的，框架不认识，所以要在spring-mvc.xml里配置：
<!--配置日期类型转换器，类型转换器的组件，把日期类型转换注入到组件对象中--><bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean"><property name="converters"><set><bean class="com.qcby.controller.StringToDate"></bean></set></property></bean><!--让映射器、适配器和处理器生效(默认不配置也是可以的)--><mvc:annotation-driven conversion-service="conversionService"/><!--这个要开启--><!-- 配置spring开启注解mvc的支持--><!--<mvc:annotation-driven></mvc:annotation-driven>--><!--而且这个要关闭-->(4)重新启动tomcat：
六、怎么让控制台输出的是自己输入的格式？
1.最简单的方式：在输出语句那用SimpleDateFormat对象
StudentController类里：
import com.qcby.pojo.Student;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import java.text.SimpleDateFormat;@Controller@RequestMapping("/stu")public class StudentController {@RequestMapping("/student.do")public String studentSave(Student student){System.out.println(student);SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyy-MM-dd");String format = simpleDateFormat.format(student.getBirthday());System.out.println(format);return "success";}}运行：
控制台：
2.实体类的日期上加两个注解(@DateTimeFormat和@JsonFormat)
这样就是接收的时候就以这种方式接收，显示的时候还以这种方式显示，就不用自定义类型转换器了
(1)使用@JsonFormat注解先导入依赖
<dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.9.2</version></dependency>(2)实体类：
import com.fasterxml.jackson.annotation.JsonFormat;import org.springframework.format.annotation.DateTimeFormat;import java.util.Date;public class Student {private String stuName;private Integer age;@DateTimeFormat(pattern = "yyyy-MM-dd") //输入@JsonFormat(pattern = "yyyy-MM-dd",timezone = "GMT+8") //显示private Date birthday;public Student() {}public Student(String stuName, Integer age, Date birthday) {this.stuName = stuName;this.age = age;this.birthday = birthday;}public String getStuName() {return stuName;}public void setStuName(String stuName) {this.stuName = stuName;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}@Overridepublic String toString() {return "Student{" +"stuName='" + stuName + '\'' +", age=" + age +", birthday=" + birthday +'}';}}(3)spring-mvc.xml里配置spring开启注解mvc的支持
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><!-- 配置spring创建容器时要扫描的包 --><context:component-scan base-package="com.qcby.controller"></context:component-scan><!-- 配置视图解析器 --><bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/pages/"></property><property name="suffix" value=".jsp"></property></bean><!-- 配置spring开启注解mvc的支持--><mvc:annotation-driven></mvc:annotation-driven></beans>