------------吾亦无他,唯手熟尔,谦卑若愚,好学若饥-------------
我将用自认为最简单的语言,描述Springmvc的文件上传,来将老夫毕生功力灌顶传授给你
首先文件上传,又简至深
前提有吗?jar包,form表单里的属性(method="post" enctype="multipart/form-data")
jar包的节点我给出来:
<!--文件上传的jar包-->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>1.4</version>
</dependency>
下面我开始我第一个案例,最简单的文件上传:
1.jsp页面:fileupload.jsp
<%--
Created by IntelliJ IDEA.
User: Dawn
Date: 2018/4/2
Time: 14:19
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
<title>文件上传</title>
</head>
<body>
<h1>文件上传</h1>
<form action="${pageContext.request.contextPath}/fileuploadfirst" method="post" enctype="multipart/form-data">
文件1 <input type="file" name="upload"/>
<input type="submit"/>
</form>
</body>
</html>
success.jsp
<%--
Created by IntelliJ IDEA.
User: Dawn
Date: 2018/4/2
Time: 14:19
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
<title>成功</title>
</head>
<body>
<h1>SUCCESS</h1>
</body>
</html>
2.在webapp下你jsp页面的那个包下创建一个文件夹,我的叫upload,里面随便扔个东西,编译后,如果即使这样target目录下还没有upload这个文件夹的话,就手动创建
3.创建处理器和处理方法
package cn.dawn.day24fileupload;
import com.sun.org.glassfish.gmbal.ParameterNames;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpSession;
import java.io.File;
import java.io.IOException;
/**
* Created by Dawn on 2018/4/2.
*/
@Controller
public class FileupLoad {
/*最初始版本*/
@RequestMapping("/fileuploadfirst")
public String fileuploadfirst(MultipartFile upload, HttpSession session){
/*获取上传文件的简单名称例如 1.txt*/
String childrlPath = upload.getOriginalFilename();
/*获得一个真实路径*/
String parentPath = session.getServletContext().getRealPath("/day24/upload");
/*获取一个完整的文件对象*/
File file=new File(parentPath,childrlPath);
/*传输创建到本地*/
try {
upload.transferTo(file);
/*上传成功*/
return "success";
} catch (IOException e) {
e.printStackTrace();
}
/*上传失败*/
return "fileupload";
}
}
4.自己的xml配置文件:这儿其实我想删减点的,文件名中文的处理和文件大小限制放在后面讲也行,不过放在这儿,你们应该也能理解
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!--包扫描器-->
<context:component-scan base-package="cn.dawn.day24fileupload"></context:component-scan>
<!--视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/day24/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--多部分文件解析器-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!--文件名的编码-->
<property name="defaultEncoding" value="UTF-8"></property>
<!--限制文件大小--><!--这个单位是byte,我这儿限制的是20mb最大容量-->
<property name="maxUploadSize" value="20971520"></property>
</bean>
<!--绑定注解驱动-->
<mvc:annotation-driven></mvc:annotation-driven>
</beans>
5.web.xml中修改中央处理器的上下文配置参数为上面那个xml
6.启动tomcat,访问fileupload.jsp页面
第二个案例:多文件上传
1.jsp页面fileuploadmore.jsp:
<%--
Created by IntelliJ IDEA.
User: Dawn
Date: 2018/4/2
Time: 14:19
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
<title>文件上传</title>
</head>
<body>
<h1>文件上传</h1>
<form action="${pageContext.request.contextPath}/fileuploadsecond" method="post" enctype="multipart/form-data">
文件1 <input type="file" name="upload"/>
文件2 <input type="file" name="upload"/>
文件3 <input type="file" name="upload"/>
<input type="submit"/>
</form>
</body>
</html>
success.jsp
<%--
Created by IntelliJ IDEA.
User: Dawn
Date: 2018/4/2
Time: 14:19
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
<title>成功</title>
</head>
<body>
<h1>SUCCESS</h1>
</body>
</html>
2.处理器处理方法
package cn.dawn.day24fileupload;
import com.sun.org.glassfish.gmbal.ParameterNames;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpSession;
import java.io.File;
import java.io.IOException;
/**
* Created by Dawn on 2018/4/2.
*/
@Controller
public class FileupLoad {
/*多文件版本*/
@RequestMapping("/fileuploadsecond")
public String fileuploadsecond(@RequestParam MultipartFile[] upload, HttpSession session){
for (MultipartFile item :upload) {
if(item.getSize()>0) {
/*获取上传文件的简单名称例如 1.txt*/
String childrlPath = item.getOriginalFilename();
/*获得一个真实路径*/
String parentPath = session.getServletContext().getRealPath("/day24/upload");
/*获取一个完整的文件对象*/
File file = new File(parentPath, childrlPath);
/*传输创建到本地*/
try {
item.transferTo(file);
/*上传成功*/
} catch (IOException e) {
e.printStackTrace();
return "fileuploadmore";
}
}
}
/*上传失败*/
return "success";
}
/*最初始版本*/
@RequestMapping("/fileuploadfirst")
public String fileuploadfirst(MultipartFile upload, HttpSession session){
/*获取上传文件的简单名称例如 1.txt*/
String childrlPath = upload.getOriginalFilename();
/*获得一个真实路径*/
String parentPath = session.getServletContext().getRealPath("/day24/upload");
/*获取一个完整的文件对象*/
File file=new File(parentPath,childrlPath);
/*传输创建到本地*/
try {
upload.transferTo(file);
/*上传成功*/
return "success";
} catch (IOException e) {
e.printStackTrace();
}
/*上传失败*/
return "fileupload";
}
}
3.自己的xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!--包扫描器-->
<context:component-scan base-package="cn.dawn.day24fileupload"></context:component-scan>
<!--视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/day24/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--多部分文件解析器-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!--文件名的编码-->
<property name="defaultEncoding" value="UTF-8"></property>
<!--限制文件大小--><!--这个单位是byte,我这儿限制的是20mb最大容量-->
<property name="maxUploadSize" value="20971520"></property>
</bean>
<!--绑定注解驱动-->
<mvc:annotation-driven></mvc:annotation-driven>
</beans>
4.修改web.xml的中央调度器的上下文配置位置为上面那个xml
5.在webapp下你jsp页面的那个包下创建一个文件夹,我的叫upload,里面随便扔个东西,编译后,如果即使这样target目录下还没有upload这个文件夹的话,就手动创建
6.启动tomcat,访问fileuploadmore.jsp页面