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src/main/java/co/nook/app/todo/service/TodoService.java

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+package co.nook.app.todo.service;
+
+import co.nook.app.todo.vo.TodoVo;
+
+import java.sql.Connection;
+import java.util.ArrayList;
+
+public interface TodoService{
+	public ArrayList<TodoVo> selectAll(Connection conn);
+	public int insert(Connection conn, TodoVo vo);
+	public int update(Connection conn, TodoVo vo);
+	public int delete(Connection conn, TodoVo vo);
+}