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				@ -9,6 +9,7 @@ import com.yihu.mysql.query.BaseJpaService; 
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				import org.springframework.beans.factory.annotation.Autowired; 
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				import org.springframework.stereotype.Service; 
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				import javax.transaction.Transactional; 
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				import java.io.UnsupportedEncodingException; 
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				import java.net.URLDecoder; 
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				import java.util.Date; 
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				@ -48,6 +49,7 @@ public class KnowledgeCategoryService extends BaseJpaService<KnowledgeCategoryDO 
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						return knowledgeCategoryDao.save(knowledgeCategoryDO); 
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					} 
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					@Transactional 
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					public Boolean updateDel(String code) { 
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						List<KnowledgeArticleDO> byCategory = articleDao.findByCategory(code); 
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						if (null != byCategory && byCategory.size() > 0) { 
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