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使用jersey上传图片到图片服务器

2016-12-11 16:46 591 查看

实际项目中可能要用到单独的文件服务器，这时候可以使用jersey上传文件的方法达到分离文件服务器和主服务器的目的

1. 修改tomcat配置，允许文件写操作

使用Tomcat需要修改conf目录下的web.xml，添加readonly参数为false

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<servlet>

        <servlet-name>default</servlet-name>

        <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>

        <init-param>

            <param-name>debug</param-name>

            <param-value>0</param-value>

        </init-param>

        <init-param>

            <param-name>readonly</param-name>

            <param-value>false</param-value>

        </init-param>

        <init-param>

            <param-name>listings</param-name>

            <param-value>true</param-value>

        </init-param>

        <load-on-startup>1</load-on-startup>

</servlet>

2. 新建文件服务器web工程

新建文件服务器的web工程，其他默认，在webapp下新建upload目录用于存储上传后的照片，放置一个任意文件，放置打包的时候空文件夹被忽略掉

3. 新建项目web工程

jersey用到的jar

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<dependency>

      <groupId>com.sun.jersey</groupId>

      <artifactId>jersey-core</artifactId>

      <version>1.19</version>

    </dependency>

    <dependency>

      <groupId>com.sun.jersey</groupId>

      <artifactId>jersey-client</artifactId>

      <version>1.19</version>

</dependency>

在springmvc中配置CommonsMultipartResolver支持文件上传

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<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

        <property name="maxUploadSize" value="10240000"/>

</bean>

编写Controller进行文件上传

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package cn.codeyang.controller;



import cn.codeyang.util.PropUtils;

import com.sun.jersey.api.client.Client;

import com.sun.jersey.api.client.WebResource;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.multipart.MultipartFile;

import org.springframework.web.multipart.MultipartHttpServletRequest;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

import java.util.Iterator;



/**

* 使用Jersey加springmvc上传文件到文件服务器

*/

@Controller

@RequestMapping("/upload")

public class UploadController {



    @RequestMapping(value = "/toUpload", method = RequestMethod.GET)

    public String tuUpload(){

        return "upload";

    }



    @RequestMapping(value = "upload", method = RequestMethod.POST)

    public void upload(HttpServletRequest request, HttpServletResponse response) throws IOException {

        MultipartHttpServletRequest req = (MultipartHttpServletRequest) request;

        Iterator<String> iter = req.getFileNames();

        if (iter.hasNext()){

            String fileName = iter.next();

            MultipartFile file = req.getFile(fileName);

            fileName = file.getOriginalFilename();

            byte[] byteArr = file.getBytes();

            Client client = Client.create();

            WebResource resource = client.resource(PropUtils.readProp("file_path") + "/upload/" + fileName);

            resource.put(byteArr);

        }

    }

}

编写前端jsp代码

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<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<%@ page isELIgnored="false" %>

<html>

<head>

    <title></title>

</head>

<body>

<form action="<c:url value="/upload/upload"/> " method="post" enctype="multipart/form-data">

    <input type="file" name="f"/>

    <input type="submit" value="Submit">

</form>

</body>

</html>

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