Spring可以為屬性或bean注入基本類型的值,當(dāng)要插入非基本類型的值時(shí),使用屬性編輯器即可,今天這篇文章是錯(cuò)新技術(shù)頻道小編總結(jié)Spring注入Date類型的步驟吧!
Spring注入Date類型的三種方法總結(jié)
測(cè)試Bean:
public class DateBean { private Date birthday; public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } } 方式1:利用SimpleDateFormat的構(gòu)造方法注入
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" 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="dateFormat" class="java.text.SimpleDateFormat"> <constructor-arg value="yyyy-MM-dd" /> </bean> <bean id="datebean" class="com.springDemo1.Date類型注入.DateBean"> <property name="birthday"> <bean factory-bean="dateFormat" factory-method="parse"> <constructor-arg value="2015-12-31" /> </bean> </property> </bean> </beans>
方式2:純配置,先自定義CustomDateEditor,再轉(zhuǎn)換類型
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" 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"> <!-- 自定義日期編輯器 --> <bean id="dateEditor" class="org.springframework.beans.propertyeditors.CustomDateEditor"> <constructor-arg> <bean class="java.text.SimpleDateFormat"> <constructor-arg value="yyyy-MM-dd"></constructor-arg> </bean> </constructor-arg> <constructor-arg value="true" /> </bean> <!-- 使 Spring轉(zhuǎn)換為java.util.Date --> <bean class="org.springframework.beans.factory.config.CustomEditorConfigurer"> <property name="customEditors"> <map> <entry key="java.util.Date"> <ref bean="dateEditor" /> </entry> </map> </property> </bean> </beans>
方式3:先用一個(gè)類重寫PropertyEditorSupport的setAsText方法,再在配置文件中,配置轉(zhuǎn)換類型就可以了,跟上面方法類似
public class MyDatePropertyEditor extends PropertyEditorSupport { private String format; public String getFormat() { return format; } public void setFormat(String format) { this.format = format; } // text為需要轉(zhuǎn)換的值,當(dāng)為bean注入的類型與編輯器轉(zhuǎn)換的類型匹配時(shí)就會(huì)交給setAsText方法處理 public void setAsText(String text) throws IllegalArgumentException { SimpleDateFormat sdf = new SimpleDateFormat(format); try { this.setValue(sdf.parse(text)); } catch (ParseException e) { e.printStackTrace(); } } } <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" 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"> <!--方式3:創(chuàng)建一個(gè)類 重寫PropertyEditorSupport的setAsText方法 --> <!-- 自定義日期編輯器 --> <bean class="org.springframework.beans.factory.config.CustomEditorConfigurer"> <property name="customEditors"> <!--需要編輯的屬性類型,是一個(gè)map --> <map> <entry key="java.util.Date"> <bean class="com.springDemo1.Date類型注入.MyDatePropertyEditor"> <property name="format" value="yyyy-MM-dd" /> <!--注入需要轉(zhuǎn)換的格式 --> </bean> </entry> </map> </property> </bean> </beans>
測(cè)試:
public class DateTest { @Test public void testName() throws Exception { ApplicationContext context = new ClassPathXmlApplicationContext( "applicationContext.xml"); DateBean bean = (DateBean) context.getBean("datebean"); System.out.println(bean.getBirthday()); } } 本文是錯(cuò)新技術(shù)頻道為大家總結(jié)Spring注入Date類型的步驟,大家都了解了嗎?如果大家對(duì)本文有任何疑問(wèn),可以隨時(shí)給錯(cuò)新技術(shù)頻道小編留言哦!新聞熱點(diǎn)
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