spring - 文件上传在 Primefaces 中不起作用-6ren

spring - 文件上传在 Primefaces 中不起作用

转载作者：IT老高更新时间：2023-10-28 13:47:34

我对 <p:fileUpload> 有一些问题在 Primefaces 中。起初我尝试了 Documentation of Fileupload 中的片段从 2018 页开始。第一个问题是，如果我使用代码段，则不会调用上传函数:

public void upload() {
    System.out.println("This is never shown");

    if(file != null) {
            System.out.println("This is never shown");
    }
}

html:

<h:form  enctype="multipart/form-data">
    <p:fileUpload value="#{fileUploadView.file}" mode="simple" />
    <p:commandButton value="Submit" action="#{fileUploadView.upload}" ajax="false"/>
</h:form>

我尝试了许多其他片段和解决方案。高级模式，用fileUploadListener，删除了h:form中的enctype，....

如果我选择 mode="simple"并将其与 ajax="true" 结合使用函数FileUploadView.upload()被调用，但文件始终为 NULL。

如果我从 <h:form> 中删除 enctype , 函数 FileUploadView.upload()被调用，但文件始终为 NULL。

我提到了上面的问题，因为这也不应该起作用，因为我在这个论坛上阅读了所有可能的解决方案。我还添加了所有建议的 dependencies和 context-params和 filter ，但它不起作用。

在这里我将发布我的 pom.xml、web.xml 和完整的 .java 代码: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>at.qe</groupId>
    <artifactId>ASN_Application</artifactId>
    <version>1.0.0</version>
    <packaging>war</packaging>


    <name>ASN_Application</name>
    <description>
    </description>

    <repositories>
        <repository>
            <id>prime-repo</id>
            <name>Prime Repo</name>
            <url>http://repository.primefaces.org</url>
        </repository>


        <repository>
            <id>spring-releases</id>
            <url>https://repo.spring.io/libs-release</url>
        </repository>

    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-releases</id>
            <url>https://repo.spring.io/libs-release</url>
        </pluginRepository>
    </pluginRepositories>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.1.RELEASE</version>
    </parent>

    <properties>
        <start-class>at.qe.sepm.asn_app.Main</start-class>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.5</version>

        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.2</version>
        </dependency>
        <dependency>
            <groupId>org.primefaces.themes</groupId>
            <artifactId>all-themes</artifactId>
            <version>1.0.10</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.glassfish.web</groupId>
            <artifactId>el-impl</artifactId>
            <version>2.2</version>
        </dependency>
        <dependency>
            <groupId>javax.enterprise</groupId>
            <artifactId>cdi-api</artifactId>
            <version>2.0-PFD2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>com.sun.faces</groupId>
            <artifactId>jsf-api</artifactId>
            <version>2.2.14</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>com.sun.faces</groupId>
            <artifactId>jsf-impl</artifactId>
            <version>2.2.13</version>
            <scope>compile</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-core</artifactId>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.primefaces</groupId>
            <artifactId>primefaces</artifactId>
            <version>6.1</version>
        </dependency>

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.16</version>
        </dependency>
        <dependency>
            <groupId>com.lowagie</groupId>
            <artifactId>itext</artifactId>
            <version>2.1.7</version>
        </dependency>

        <!-- special test dependencies -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>nl.jqno.equalsverifier</groupId>
            <artifactId>equalsverifier</artifactId>
            <version>2.1.6</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>6.0.6</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <!-- Enable jacoco analysis -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <forkMode>once</forkMode>
                    <argLine>
                        ${coverageAgent}
                    </argLine>
                    <useSystemClassLoader>true</useSystemClassLoader>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <version>0.7.6.201602180812</version>
                <configuration>
                    <propertyName>coverageAgent</propertyName>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>prepare-agent</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>report</id>
                        <phase>prepare-package</phase>
                        <goals>
                            <goal>report</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
          http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         version="2.5">

    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <error-page>
        <exception-type>org.springframework.security.access.AccessDeniedException</exception-type>
        <location>/error/access_denied.xhtml</location>
    </error-page>


    <context-param>
        <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
        <param-value>server</param-value>
    </context-param>
    <context-param>
        <param-name>javax.faces.FACELETS_SKIP_COMMENTS</param-name>
        <param-value>true</param-value>
    </context-param>

<context-param>
    <param-name>primefaces.FONT_AWESOME</param-name>
    <param-value>true</param-value>
</context-param>
 <context-param>
    <param-name>primefaces.UPLOADER</param-name>
    <param-value>commons</param-value>
  </context-param>

 <filter>
    <filter-name>PrimeFaces FileUpload Filter</filter-name>
    <filter-class>org.primefaces.webapp.filter.FileUploadFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>PrimeFaces FileUpload Filter</filter-name>
    <servlet-name>Faces Servlet</servlet-name>
</filter-mapping>
    <mime-mapping>
    <extension>eot</extension>
    <mime-type>application/vnd.ms-fontobject</mime-type>
</mime-mapping>
<mime-mapping>  
    <extension>otf</extension>  
    <mime-type>font/opentype</mime-type>  
</mime-mapping>      
<mime-mapping>  
    <extension>ttf</extension>  
    <mime-type>application/x-font-ttf</mime-type>  
</mime-mapping>      
<mime-mapping>  
    <extension>woff</extension>  
    <mime-type>application/x-font-woff</mime-type>  
</mime-mapping>
<mime-mapping>  
    <extension>svg</extension>  
    <mime-type>image/svg+xml</mime-type>  
</mime-mapping>

    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.xhtml</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>login.xhtml</welcome-file>
    </welcome-file-list>
</web-app>

FileUploadView.java

@Component
@Scope("view")    
public class FileUploadView{
        @Autowired
        private PictureService pictureService;
        @Autowired
        private UserRepository userRepository;
        @Autowired
        private AuditLogRepository auditLogRepository;
        private Picture picture;
        private UploadedFile file;

        public Picture getPicture(){
            return picture;
        }

        public void setPicture(Picture picture){
            this.picture = picture;
        }


        public UploadedFile getFile() {
            return file;
        }

        public void setFile(UploadedFile file) {
            this.file = file;
        }
        @PostConstruct
        public void init(){
            file= new DefaultUploadedFile();
        }

        public void upload() {

            if(file != null) {
                try{
                    System.out.println("This is never shown");

                    AuditLog log = new AuditLog(getAuthenticatedUser().getUsername(),"PICTURE UPLOADED: " + getAuthenticatedUser().getUsername() + " [" + getAuthenticatedUser().getUserRole() + "] ", new Date());
                    auditLogRepository.save(log);
                    System.out.println(file.getFileName());
                    picture = new Picture(file.getFileName(), userRepository.findFirstByUsername(auth.getName()), new Date(), file.getFileName());
                    pictureService.savePicture(picture);
                FacesMessage message = new FacesMessage("Succesful", file.getFileName() + " is uploaded.");
                FacesContext.getCurrentInstance().addMessage(null, message);
                String filename = FilenameUtils.getName(file.getFileName());
                InputStream input = file.getInputstream();
                OutputStream output = new FileOutputStream(new File( filename));
                try {
                    IOUtils.copy(input, output);
                } finally {
                    IOUtils.closeQuietly(input);
                    IOUtils.closeQuietly(output);
                }
                }catch(Exception e)
                {

                }
            }
        }

如果有人可以帮助我找到问题，我将不胜感激。

提前致谢

[编辑]:我尝试制作一个干净的 Spring 项目，并尝试了所有可能的制作 <p:fileUpload> ，但它们都不起作用。但是我查看了浏览器的流量，发现了一些有趣的东西: . POST 语句在我按下上传按钮后立即出现，其他 GET 语句在 1-2 秒后出现。

最佳答案

文档说

Advanced File Upload

FileUploadListener is the way to access the uploaded files in this mode, when a file is uploadeddefined fileUploadListener is processed with a FileUploadEvent as the parameter.

使用 FileUploadEvent 参数添加 fileUploadListener。使按钮 AJAXical。丢失编码类型。不要在意 fileUpload 的值。

关于spring - 文件上传在 Primefaces 中不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43804766/

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spring - 文件上传在 Primefaces 中不起作用