servlet 3.0引用后，编译报错，请指教

ilovethislinux

开始编译BAAS模型......
编译BAAS模型结束
编译用时：  0 秒
开始编译BAAS Service Java......
log4j:WARN No appenders could be found for logger (com.justep.baas.BaasException).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
com.justep.baas.compiler.CompileException: 编译模块Java出错
E:\WeX5_V3.8\runtime\BaasServer\baas\remaiappaction\FileUpload.java:42: 错误: 找不到符号
            String savePath=request.getServletContext().getRealPath("/uploadFile");
                                   ^
  符号:   方法 getServletContext()
  位置: 类型为HttpServletRequest的变量 request
E:\WeX5_V3.8\runtime\BaasServer\baas\remaiappaction\FileUpload.java:43: 错误: 找不到符号
            Part part = request.getPart("file");
                               ^
  符号:   方法 getPart(String)
  位置: 类型为HttpServletRequest的变量 request
2 个错误

        at com.justep.baas.compiler.java.JavaCompiler.compile(Unknown Source)
        at com.justep.baas.compiler.java.Compiler.compileJavaDir(Unknown Source)
        at com.justep.baas.compiler.java.Compiler.compileJavaDir(Unknown Source)
        at com.justep.baas.compiler.java.Compiler.compileJavaDir(Unknown Source)
        at com.justep.baas.compiler.java.Compiler.compileJavaCode(Unknown Source)
        at com.justep.baas.compiler.java.Compiler.compile2jar(Unknown Source)
        at com.justep.baas.compiler.java.Compiler.compile2jar(Unknown Source)
        at com.justep.baas.compiler.java.Compiler.compile(Unknown Source)
        at com.justep.baas.compiler.CompilerFactory.main(Unknown Source)

ilovethislinux

import java.io.File;
import java.io.IOException;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
import javax.naming.NamingException;
import com.alibaba.fastjson.JSONObject;
import com.justep.baas.action.ActionContext;
//包已经全部引入