diff --git a/blogserver/src/main/java/org/sang/service/CategoryService.java b/blogserver/src/main/java/org/sang/service/CategoryService.java
new file mode 100644
index 0000000..d7ce692
--- /dev/null
+++ b/blogserver/src/main/java/org/sang/service/CategoryService.java
@@ -0,0 +1,37 @@
+package org.sang.service;
+
+import org.sang.bean.Category;
+import org.sang.mapper.CategoryMapper;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.sql.Timestamp;
+import java.util.List;
+
+
+@Service
+@Transactional
+public class CategoryService {
+    @Autowired
+    CategoryMapper categoryMapper;
+
+    public List<Category> getAllCategories() {
+        return categoryMapper.getAllCategories();
+    }
+
+    public boolean deleteCategoryByIds(String ids) {
+        String[] split = ids.split(",");
+        int result = categoryMapper.deleteCategoryByIds(split);
+        return result == split.length;
+    }
+
+    public int updateCategoryById(Category category) {
+        return categoryMapper.updateCategoryById(category);
+    }
+
+    public int addCategory(Category category) {
+        category.setDate(new Timestamp(System.currentTimeMillis()));
+        return categoryMapper.addCategory(category);
+    }
+}