嗨,我想上传一张图片并将其存储在我使用 spring mvc 和 hibernate 的数据库中
这是模型
import java.sql.Blob;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Lob;
import javax.persistence.Table;
@Entity
@Table(name = "article")
public class Article {
@Id
@GeneratedValue
@Column(name = "article_id")
private Long articleId;
@Column(name = "article_name", nullable = false, length=20)
private String articleName;
@Column(name = "article_desc", nullable = false)
private String articleDesc;
@Column(name = "date_added")
private Date addedDate;
@Lob
private Blob content;
public Article() {
}
public Long getArticleId() {
return articleId;
}
public void setArticleId(Long articleId) {
this.articleId = articleId;
}
public String getArticleName() {
return articleName;
}
public void setArticleName(String articleName) {
this.articleName = articleName;
}
public String getArticleDesc() {
return articleDesc;
}
public void setArticleDesc(String articleDesc) {
this.articleDesc = articleDesc;
}
public Date getAddedDate() {
return addedDate;
}
public void setAddedDate(Date addedDate) {
this.addedDate = addedDate;
}
public String toString(){
return this.articleName;
}
public void setContent(Blob content) {
this.content = content;
}
public Blob getContent() {
return content;
}
}
这是控制器(保存文章的方法)
@RequestMapping(value = "/save", method = RequestMethod.POST)
public String save(
@ModelAttribute("article") Article article,
@RequestParam("file") MultipartFile file) {
try {
Blob blob = Hibernate.createBlob(file.getInputStream());
article.setContent(blob);
} catch (IOException e) {
e.printStackTrace();
}
try {
articleService.addArticle( article);
} catch(Exception e) {
e.printStackTrace();
}
return "redirect:/articles.html";
}
当我想用我的 JSP 表单保存一篇新文章时,我遇到了这个错误
33266 [http-8080-2] 调试 org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerExceptionResolver - 从处理程序 [net.roseindia.controller.ArticleController@10e8647] 解决异常:org.springframework.beans.ConversionNotSupportedException:转换失败“java.lang.String”类型的值到所需类型“org.springframework.web.multipart.MultipartFile”;嵌套异常是 java.lang.IllegalStateException:无法将类型 [ java.lang.String ] 的值转换为所需类型 [ org.springframework.web.multipart.MultipartFile]:没有找到匹配的编辑器或转换策略 33270 [http-8080-2] 调试 org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver - 解决来自处理程序 [net.roseindia.controller.ArticleController@10e8647] 的异常:org. springframework.beans.ConversionNotSupportedException:无法将“java.lang.String”类型的值转换为所需的“org.springframework.web.multipart.MultipartFile”类型;嵌套异常是 java.lang.IllegalStateException:无法将类型 [java.lang.String] 的值转换为所需类型 [org.springframework.web.multipart.MultipartFile]:找不到匹配的编辑器或转换策略 33270 [http-8080-2 ] 调试 org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver - 解决来自处理程序 [net.roseindia.controller.ArticleController@10e8647] 的异常:org. springframework.beans.ConversionNotSupportedException:无法将“java.lang.String”类型的值转换为所需的“org.springframework.web.multipart.MultipartFile”类型;嵌套异常是 java.lang.IllegalStateException:无法将类型 [java.lang.String] 的值转换为所需类型 [org.springframework.web.multipart.MultipartFile]:找不到匹配的编辑器或转换策略
有谁能够帮助我