Ⅵ.spring的点点滴滴--自定义类型转换器

承接上文

自定义类型转换器

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.net篇（环境为vs2012+Spring.Core.dll v1.31）

    public class CustomeConverter : TypeConverter{

        public override bool CanConvertFrom(

            ITypeDescriptorContext context,

            Type sourceType){

            return true;

        }

        public override object ConvertFrom(

            ITypeDescriptorContext context, 

            System.Globalization.CultureInfo culture, 

            object value){

            return new TypeCunstomer() { Name = value.ToString() };

        }    

    }

    public class TypeObject{

        public TypeCunstomer Name { get; set; }    

    }

    public class TypeCunstomer{

        public string Name { get; set; }

    }

    <object 

       type="Spring.Objects.Factory.Config.CustomConverterConfigurer, Spring.Core">

    <property name="CustomConverters">

      <dictionary>

        <entry key="SpringBase.TypeCunstomer">

          <object type="SpringBase.CustomeConverter"/>

        </entry>

      </dictionary>

    </property>

  </object>

  <object id="typeconvert" type="SpringBase.TypeObject,SpringBase">

    <property name="Name" value="2"/>

  </object>

1. 继承中的CanConvertFrom方法是用于判断能否转换,ConvertFrom转换的具体方法

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java篇（环境为Maven+Jdk1.7+IntelliJ IDEA 12.1.4）

package springdemo;

import java.beans.PropertyEditorSupport;

public class TypeObject {

    private TypeCunstomer name;

    public TypeCunstomer getName() {

        return name;

    }

    public void setName(TypeCunstomer name) {

        this.name = name;

    }

}

class TypeCunstomer {

    private String name;

    String getName() {

        return name;

    }

    void setName(String name) {

        this.name = name;

    }

}

class CustomeConverter extends PropertyEditorSupport {

    @Override

    public void setAsText(String text) throws IllegalArgumentException {

        TypeCunstomer val=new TypeCunstomer();

        val.setName(text+"Convent");

        this.setValue(val);

    }

}

    <bean class="org.springframework.beans.factory.config.CustomEditorConfigurer">

        <property name="customEditors">

            <map>

                <entry key="springdemo.TypeCunstomer">

                    <bean class="springdemo.CustomeConverter" />

                </entry>

            </map>

        </property>

    </bean>

    <bean id="typeObject" class="springdemo.TypeObject">

        <property name="name" value="1"/>

    </bean>

1. 重写setAsText方法，其中setValue的参数为object

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java和Csharp的共同点

1. 配置文件中的dictionary|map标签设置的key为要转换的类型,值为转换的方法类
2. 都是继承一个对象，然后重写方法来自定义类型的转换

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