Spring注入Date类型的三种方法总结


            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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