Spring注入Date類型的三種方法總結
測試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：先用一個類重寫PropertyEditorSupport的setAsText方法，再在配置文件中，配置轉換類型就可以了，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為需要轉換的值，當為bean注入的類型與編輯器轉換的類型匹配時就會交給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：創建一個類 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" /> <!--注入需要轉換的格式 --> </bean> </entry> </map> </property> </bean> </beans>
測試：
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()); } } 如有疑問請留言或者到本站社區交流討論，感謝閱讀，希望能幫助到大家，謝謝大家對本站的支持！
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