详解Spring MVC自动为对象注入枚举类型

/** 
 * 新闻类别 
 * @author: ShangJianguo 
 * 2014-6-11 上午10:51:07 
 */ 
public enum ENews { 
 
  company("0"), // 企业新闻 
  industry("1");// 行业新闻 
 
  private final String value; 
   
  private ENews(String v) { 
    this.value = v; 
  } 
   
  public String toString() { 
    return this.value; 
  } 
 
  public static ENews get(int v) { 
    String str = String.valueOf(v); 
    return get(str); 
  } 
 
  public static ENews get(String str) { 
    for (ENews e : values()) { 
      if(e.toString().equals(str)) { 
        return e; 
      } 
    } 
    return null; 
  } 
} 

public class News { 
   
  private ENews type; 
  private String adminuid; 
  private String title; 
  private String summary; 
  private String author; 
  private String origin; 
  private String originurl; 
  private String content; 
 
    // 省略setter和getter方法 
} 

@RequestMapping(value="/news/update", method=RequestMethod.POST) 
@ResponseBody 
public boolean edit_update(Map<String, Object> model,HttpServletRequest request,News news){ 
  String adminid = getAdminid(); 
  news.init(adminSO.getAdminByAdminid(adminid).getUid()); 
  if (news != null) { 
    if (newsSO.update(news)) { 
      return true; 
    } 
  } 
  return false; 
} 

public class StringToENewsConverter implements Converter<String, ENews>{ 
 
  /* (non-Javadoc) 
   * @see com.fasterxml.jackson.databind.util.Converter#convert(java.lang.Object) 
   * @author: ShangJianguo 
   * 2014-6-12 下午4:56:30 
   */ 
  @Override 
  public ENews convert(String source) { 
    String value = source.trim(); 
    if ("".equals(value)) { 
      return null; 
    } 
    return ENews.get(Integer.parseInt(source)); 
 
  } 
} 

<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean"> 
  <property name="converters"> 
    <set> 
      <bean class="com.ngenius.core.converters.StringToENewsConverter" /> 
       
    </set> 
  </property> 
</bean>