MockMultipartFile无法解析为某种类型

Question

我正在为spring程序编写代码,我需要将File对象转换为MultipartFile对象.我试图通过使用MockMultipartFile类来做到这一点:

FileInputStream input = new FileInputStream(toUpload);
MultipartFile multipartFile = new MockMultipartFile("file",
                toUpload.getName(), "text/json", IOUtils.toByteArray(input));

但是,我一直在收到错误MockMultipartFile cannot be resolved to a type.为什么是这样？如果它有帮助,我正在使用Maven,以防它可能是我不知道的依赖性错误.

我也尝试过这样做CommonsMultipartFile.那个代码在这里(toUpload是File我试图转换的对象):

DiskFileItem fileItem = new DiskFileItem("file", "text/plain", false, toUpload.getName(), (int) toUpload.length() , toUpload.getParentFile());
fileItem.getOutputStream();
MultipartFile multipartFile = new CommonsMultipartFile(fileItem);

当我尝试这种方法时,我得到了错误The constructor CommonsMultipartFile(DiskFileItem) is undefined.这是为什么？

编辑:这是我们的pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.springframework</groupId>
    <artifactId>gs-uploading-files</artifactId>
    <version>0.1.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.5.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
    </dependencies>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

Answer 1

要使用spring,MockMultipartFile你需要添加spring-test为编译依赖项(这是不常见的,因为它通常用作测试依赖项):

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
</dependency>