详解SpringMVC 自动封装枚举类的方法

川长思鸟来 2021-06-24 15:57 464阅读 0赞

springmvc默认无法自动封装枚举类，本篇文章主要介绍了详解SpringMVC 自动封装枚举类的方法，有兴趣的可以了解一下。

springmvc默认无法自动封装枚举类，解决方法如下：

1.枚举类

public enum GoodsPromoteEnum {
    
      /**
       * 0 精品
       */
      fine("精品",0),
      /**
       * 1 限时购
       */
      limit("限时购",1), 
      /**
       * 2 特价
       */
      cheap("特价",2);
      
      private String value;
    
      private int index;
    
      private GoodsPromoteEnum(String value, int index) {
        this.value = value;
        this.index = index;
      }
      
      public static GoodsPromoteEnum get(String value){
        for (GoodsPromoteEnum p : GoodsPromoteEnum.values()) {
          if (p.getValue().equals(value)) {
            return p;
          }
        }
        return null;
      }
      
      public static GoodsPromoteEnum get(int index){
        for (GoodsPromoteEnum p : GoodsPromoteEnum.values()) {
          if (p.getIndex() == index) {
            return p;
          }
        }
        return null;
      }
    
      public String getValue() {
        return value;
      }
    
      public void setValue(String value) {
        this.value = value;
      }
    
      public int getIndex() {
        return index;
      }
    
      public void setIndex(int index) {
        this.index = index;
      }
    }

2.编写自定义处理类，继承Converter接口

public class StringToGoodsConverter implements Converter<String, GoodsPromoteEnum> {
    
      @Override
      public GoodsPromoteEnum convert(String value) {
        if (StringUtils.isBlank(value)) {
         return null;
        }
        return GoodsPromoteEnum.get(value);
      }
    
    }

3.在springmvc配置文件里配置

<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
        <property name="converters">
         <set>
          <bean class="com.tentcoo.zbh.util.StringToGoodsConverter" />
         </set>
        </property>
       </bean>