Spring注入Date类型的三种方法总结

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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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