Spring注入Date类型的三种方法总结
测试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的构造方法注入
<?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类型注入.DateBean">
<property name="birthday">
<bean factory-bean="dateFormat" factory-method="parse">
<constructor-arg value="2015-12-31" />
</bean>
</property>
</bean>
</beans>
方式2：纯配置，先自定义CustomDateEditor，再转换类型
<?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">
<!-- 自定义日期编辑器 -->
<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转换为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：先用一个类重写PropertyEditorSupport的setAsText方法，再在配置文件中，配置转换类型就可以了，跟上面方法类似
public class MyDatePropertyEditor extends PropertyEditorSupport {
private String format;
public String getFormat() {
return format;
}
public void setFormat(String format) {
this.format = format;
}
// text为需要转换的值，当为bean注入的类型与编辑器转换的类型匹配时就会交给setAsText方法处理
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：创建一个类 重写PropertyEditorSupport的setAsText方法 -->
<!-- 自定义日期编辑器 -->
<bean class="org.springframework.beans.factory.config.CustomEditorConfigurer">
<property name="customEditors"> <!--需要编辑的属性类型，是一个map -->
<map>
<entry key="java.util.Date">
<bean class="com.springDemo1.Date类型注入.MyDatePropertyEditor">
<property name="format" value="yyyy-MM-dd" /> <!--注入需要转换的格式 -->
</bean>
</entry>
</map>
</property>
</bean>
</beans>
测试：
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());
}
}
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