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Java spring引导中图像上载不成功

java spring spring-boot file spring-mvc

Java spring引导中图像上载不成功,java,spring,spring-boot,file,spring-mvc,Java,Spring,Spring Boot,File,Spring Mvc,我有一个表单，其中我正在提交带有图像的数据。但当我单击“提交”按钮时，出现以下错误： org.springframework.validation.BindException:org.springframework.validation.BeanPropertyBindingResult:1错误 字段“fileData”上的对象“employee”中的字段错误：拒绝值[org.springframework.web.multipart.support.StandardMultipartTTpSe

我有一个表单，其中我正在提交带有图像的数据。但当我单击“提交”按钮时，出现以下错误：

org.springframework.validation.BindException:org.springframework.validation.BeanPropertyBindingResult:1错误 字段“fileData”上的对象“employee”中的字段错误：拒绝值[org.springframework.web.multipart.support.StandardMultipartTTpServletRequest$StandardMultipartFile@25d17d23]; 代码[typeMismatch.employee.fileData，typeMismatch.fileData，typeMismatch.org.springframework.web.multipart.commons.CommonsMultipartFile，typeMismatch]；参数[org.springframework.context.support.DefaultMessageSourceResolvable:代码[employee.fileData，fileData]；参数[]；默认消息[fileData]；默认消息[未能将类型为'org.springframework.web.multipart.support.StandardMultipartAttpServletRequest$StandardMultipartFile'的属性值转换为属性'fileData'所需的类型'org.springframework.web.multipart.commons.CommonsMultipartFile'；嵌套异常为java.lang.IllegalStateException:无法转换类型为'org.springframe'的值work.web.multipart.support.StandardMultipartTTpServletRequest$StandardMultipartFile'转换为属性“fileData”所需的类型“org.springframework.web.multipart.commons.CommonsMultipartFile”：未找到匹配的编辑器或转换策略]

我正在使用spring boot，并执行了以下操作：

应用程序属性

# multipart
multipart.enabled=true
spring.http.multipart.max-file-size=500000KB
spring.http.multipart.max-request-size=500000KB
我的GET和POST方法处理如下：

  @GetMapping("/add-employee")
    public ModelAndView empAdmin(Model model) {
        Employee employee=new Employee();
        model.addAttribute("employee", employee);
        return new ModelAndView("add-new-employee");
    }

    // POST: Save product
    @RequestMapping(value = { "/add-employee" }, method = RequestMethod.POST)
    public String productSave(@ModelAttribute("employee") Employee employee)

    {      
        employeeService.saveEmployee(employee);

        return "redirect:/add-employee";
    }
我的服务级别是：

import com.ashwin.vemployee.model.Employee;
import com.ashwin.vemployee.repository.EmployeeRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class EmployeeService {

    @Autowired
    private EmployeeRepository empRepository;

    public Employee saveEmployee(Employee employee){
        byte[] image = employee.getFileData().getBytes();
        if (image != null && image.length > 0) {
            employee.setImage(image);
        }
        if(employee.getiNumber()==null){
            empRepository.save(employee);
        }
        else{
            empRepository.save(employee);
        }
        return  employee;
    }

}
我的
addnewemployee.jsp
如下所示：

<form:form modelAttribute="employee" method="POST" enctype="multipart/form-data">

    <label>iNumber</label>
    <form:input path="iNumber" id="iNumber" type="text" class="form-control" required="required" />

    <label>Full Name:</label>
    <form:input path="fullName" id="fullName" type="text" class="form-control" required="required" />

    <label>Joined Date</label>
    <form:input path="joinedDate" id="joinedDate" type="text" class="form-control" required="required" />

    <label>Position</label>
    <form:input path="position" id="position" type="text" class="form-control" required="required" />

    <label>Reports To</label>
    <form:input path="reportsTo" id="reportsTo" type="text" class="form-control" required="required" />

    <label>Cubicle No</label>
    <form:input path="cubicleNo" id="cubicleNo" type="text" class="form-control" required="required" />

    <label>Job type</label>
    <form:input path="jobType" id="jobType" type="text" class="form-control" required="required" />

    <td>Upload Image</td>
    <td>
        <form:input type="file" path="fileData" />
    </td>
    <td> </td>

    <input type="submit" value="Submit" />
    <input type="reset" value="Reset" />

</form:form>

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.ashwin</groupId>
    <artifactId>vemployee</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>vemployee</name>
    <description>Demo project for Spring Boot for offc</description>

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

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/jstl/jstl -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!-- needed for jsp -->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <version>9.0.27</version>
        </dependency>

        <!--bootsrap and jquery-->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>bootstrap</artifactId>
            <version>4.3.1</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery</artifactId>
            <version>3.4.0</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.webjars/bootstrap-datepicker -->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>bootstrap-datepicker</artifactId>
            <version>1.7.1</version>
        </dependency>

        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.2.1</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

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

</project>
我在pom.xml中添加了新的dependecy

<dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.2.1</version>
        </dependency>


文件上传
文件上传
1.2.1
我的整个pom.xml如下所示：

<form:form modelAttribute="employee" method="POST" enctype="multipart/form-data">

    <label>iNumber</label>
    <form:input path="iNumber" id="iNumber" type="text" class="form-control" required="required" />

    <label>Full Name:</label>
    <form:input path="fullName" id="fullName" type="text" class="form-control" required="required" />

    <label>Joined Date</label>
    <form:input path="joinedDate" id="joinedDate" type="text" class="form-control" required="required" />

    <label>Position</label>
    <form:input path="position" id="position" type="text" class="form-control" required="required" />

    <label>Reports To</label>
    <form:input path="reportsTo" id="reportsTo" type="text" class="form-control" required="required" />

    <label>Cubicle No</label>
    <form:input path="cubicleNo" id="cubicleNo" type="text" class="form-control" required="required" />

    <label>Job type</label>
    <form:input path="jobType" id="jobType" type="text" class="form-control" required="required" />

    <td>Upload Image</td>
    <td>
        <form:input type="file" path="fileData" />
    </td>
    <td> </td>

    <input type="submit" value="Submit" />
    <input type="reset" value="Reset" />

</form:form>

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.ashwin</groupId>
    <artifactId>vemployee</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>vemployee</name>
    <description>Demo project for Spring Boot for offc</description>

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

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/jstl/jstl -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!-- needed for jsp -->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <version>9.0.27</version>
        </dependency>

        <!--bootsrap and jquery-->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>bootstrap</artifactId>
            <version>4.3.1</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery</artifactId>
            <version>3.4.0</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.webjars/bootstrap-datepicker -->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>bootstrap-datepicker</artifactId>
            <version>1.7.1</version>
        </dependency>

        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.2.1</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

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

</project>


4.0.0
org.springframework.boot
spring启动程序父级
2.2.1.发布
com.ashwin
雇员
0.0.1-快照
雇员
offc的弹簧靴演示项目
1.8
org.springframework.boot
spring引导启动器数据jpa
org.springframework.boot
SpringBootStarterWeb
org.springframework.boot
弹簧靴开发工具
运行时
真的
jstl
jstl
1.2
org.apache.tomcat.embed
汤姆卡特·贾斯珀
9.0.27
org.webjars
独自创立
4.3.1
org.webjars
jquery
3.4.0
org.webjars
引导数据采集器
1.7.1
文件上传
文件上传
1.2.1
mysql
mysql连接器java
运行时
org.springframework.boot
弹簧起动试验
测试
org.junit.vintage
朱尼特老式发动机
org.springframework.boot
springbootmaven插件
为什么会出现此错误？

如果有图像数据，您可以在下面尝试获取请求部分

 // POST: Save product
        @RequestMapping(value = { "/add-employee" }, method = RequestMethod.POST, consumes = {"multipart/form-data"})
        public String productSave(@ModelAttribute("employee") Employee employee,  @RequestPart("file") MultipartFile file)

        {      
            employeeService.saveEmployee(employee);

            return "redirect:/add-employee";
        }
另一个解决方案是对图像进行Base64编码并作为字符串发送，然后在服务层对其进行解码。

如果图像数据存在，您可以尝试下面的方法获取请求部分

 // POST: Save product
        @RequestMapping(value = { "/add-employee" }, method = RequestMethod.POST, consumes = {"multipart/form-data"})
        public String productSave(@ModelAttribute("employee") Employee employee,  @RequestPart("file") MultipartFile file)

        {      
            employeeService.saveEmployee(employee);

            return "redirect:/add-employee";
        }
另一个解决方案是对图像进行base64编码，并将其作为字符串发送，然后在服务层对其进行解码。

您不应该在类中将多部分文件称为
commonmultipartfile
，它只是
MultiPartFile
您不应该在类中将多部分文件称为
commonmultipartfile
，它只是<代码>多部分文件