SpringMVC配置文件中要实现文件上传和 json字符转换，需要导入什么Jar包？急！

Question

 <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.0.xsd 
http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
    <!-- 自动扫描controller包下的所有类，使其认为spring mvc的控制器 -->
    <context:component-scan base-package="com.taotao.controller" />
    <!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->

    <!-- <bean id="mappingJacksonHttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>text/html;charset=UTF-8</value>
            </list>
        </property>
    </bean> -->

    <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->
    <!-- <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
    <bean
        class="org.springframework.web.servlet.mvc.annotation.RequestMappingHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="mappingJacksonHttpMessageConverter" />
            </list>
        </property>
    </bean> -->

    <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver"
        p:prefix="/" p:suffix=".jsp" />

    <!-- <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="defaultEncoding">
            <value>UTF-8</value>
        </property>
        <property name="maxUploadSize">
            <value>32505856</value>上传文件大小限制为31M，31*1024*1024
        </property>
        <property name="maxInMemorySize">
            <value>4096</value>
        </property>
    </bean> -->

</beans>

Answer 1

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;

/**

• Descriptions *
• @version 2017年3月29日
• @author SUNTEC

• @since JDK1.6
  *
  /
  @Controller
  public class getBooks {
  // 文件上传
  @RequestMapping(value = "/upload", headers = "content-type=multipart/", method = RequestMethod.POST)
  public String upload(@RequestParam(value = "file", required = false) MultipartFile file,
  MultipartHttpServletRequest request, ModelMap model) {

      System.out.println("开始");
      String path = request.getSession().getServletContext().getRealPath("upload");
      String fileName = file.getOriginalFilename();
      // String fileName = new Date().getTime()+".jpg";
      System.out.println(path);
      File targetFile = new File(path, fileName);
      if (!targetFile.exists()) {
          targetFile.mkdirs();
      }
  
      // 保存
      try {
          file.transferTo(targetFile);
      }
      catch (Exception e) {
          e.printStackTrace();
      }
      model.addAttribute("fileUrl", request.getContextPath() + "/upload/" + fileName);
  
      return "bookstore";
  }
  

}