3. spring_injection

Spring的普通属性注入

    参见Spring文档3.3.3

 

什么叫属性编辑器呢？
    * 自定义属性编辑器，是将Spring配置文件中的字符串转换成相应的对象注入，
       Spring已经内置了许多类型编辑器，我们可以定义自己的属性编辑器
  
如何定义属性编辑器？
    * 继承PropertyEditorSupport类，覆写setAsText()方法，参见UtilDatePropertyEditor.java
    * 将属性编辑器注册到Spring中，参见applicationContext-editor.xml

 

=======================================================================

Bean1.java

 

package com.bjsxt.spring;

import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Set;

 

public class Bean1 {

     private String strValue;

     private int intValue;

     private List listValue;

     private Set setValue;

     private String[] arrayValue;

     private Map map;

     private Date dateValue;

 

     public String[] getArrayValue() {
          return arrayValue;
     }

 

     public void setArrayValue(String[] arrayValue) {
          this.arrayValue = arrayValue;
     }

 

     public int getIntValue() {
          return intValue;
     }

 

     public void setIntValue(int intValue) {
          this.intValue = intValue;
     }

 

     public List getListValue() {
          return listValue;
     }

 

     public void setListValue(List listValue) {
          this.listValue = listValue;
     }

 

     public Map getMap() {
          return map;
     }

 

     public void setMap(Map map) {
          this.map = map;
     }

 

    public Set getSetValue() {
          return setValue;
    }

 

     public void setSetValue(Set setValue) {
          this.setValue = setValue;
     }

 

     public String getStrValue() {
          return strValue;
     }

 

     public void setStrValue(String strValue) {
          this.strValue = strValue;
    }

 

     public Date getDateValue() {
          return dateValue;
     }

 

     public void setDateValue(Date dateValue) {
          this.dateValue = dateValue;
     }

 

}

 

 

 

=======================================================================

UtilDatePropertyEditor.java

 

package com.bjsxt.spring;

import java.beans.PropertyEditorSupport;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

 

public class UtilDatePropertyEditor extends PropertyEditorSupport{

     private String format;
 
     public void setAsText(String text) throws IllegalArgumentException {

          System.out.println("UtilDatePropertyEditor.setAsText()-- text = " + text);
          SimpleDateFormat sdf = new SimpleDateFormat(format);

          try {
               Date date = sdf.parse(text);
               this.setValue(date);
          } catch (ParseException e) {
               e.printStackTrace();
          }
     }

 

     public void setFormat(String format) {
          this.format = format;
     }  

 
}

 

 

 

=======================================================================

applicationContext-beans.xml

 

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:aop="http://www.springframework.org/schema/aop"
      xmlns:tx="http://www.springframework.org/schema/tx"
      xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">
     <bean id="Bean1" class="com.bjsxt.spring.Bean1">
          <property name="strValue" value="Hello"></property>
          <property name="intValue" value="123"></property>
          <property name="listValue">
               <list>
                    <value>List1</value>
                        <value>List2</value>
                        <value>List3</value>
                        <value>List4</value>
                </list>
           </property>
           <property name="setValue">
               <set>
                    <value>set1</value>
                    <value>set2</value>
                    <value>set3</value>
                    <value>set4</value>
               </set>
                      </property>
      <property name="arrayValue">
           <list>
                <value>array1</value>
                <value>array2</value>
                <value>array3</value>
                            <value>array4</value>
           </list>
      </property>
      <property name="map">
           <map>
                <entry key="key1" value="value1"></entry>
                <entry key="key2" value="value2"></entry>
                <entry key="key3" value="value3"></entry>
                            <entry key="key4" value="value4"></entry>
           </map>
      </property>
      <property name="dateValue">
           <value>2008-08-08</value>
      </property>
 </bean>
</beans>

 

 

 

=======================================================================

applicationContext-editor.xml

 

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:aop="http://www.springframework.org/schema/aop"
      xmlns:tx="http://www.springframework.org/schema/tx"
      xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">
          
    <!--  -->
      <bean id="CustomEditorConfigurer"

               class="org.springframework.beans.factory.config.CustomEditorConfigurer">
            <property name="customEditors">
                  <map>
                        <entry key="java.util.Date">
                              <bean class="com.bjsxt.spring.UtilDatePropertyEditor">
                                    <property name="format" value="yyyy-MM-dd"></property>
                              </bean>
                        </entry>
                  </map>
            </property>
      </bean>
</beans>

 

 

 

=======================================================================

InjectionTest.java

 

package com.bjsxt.spring;

import junit.framework.TestCase;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;

 

public class InjectionTest extends TestCase {

 

      public void testInjection1() {
            // 通过多个配置文件初始化bean工厂
            // String[] array = new String[]{"applicationContext-beans.xml"};
            // BeanFactory factory = new ClassPathXmlApplicationContext(array);
            // 通过配置文件初始化bean工厂
            BeanFactory factory = new ClassPathXmlApplicationContext(
                   "applicationContext-*.xml");
            Bean1 bean1 = (Bean1) factory.getBean("Bean1");

            System.out.println("strValue " + bean1.getStrValue());
            System.out.println("intValue " + bean1.getIntValue());
            System.out.println("listValue " + bean1.getListValue());
            System.out.println("setValue " + bean1.getSetValue());
            System.out.println("arrayValue " + bean1.getArrayValue());
            System.out.println("mapValue " + bean1.getMap());
            System.out.println("dateValue " + bean1.getDateValue());
      }

}