上传文件到指定URL（put方式，其他类似）

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Fighting_Boss_Hao

最新推荐文章于 2024-12-02 10:55:17 发布

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本文介绍了一种使用Apache HttpClient库在Java中实现文件上传的方法。通过示例代码展示了如何配置HTTP客户端，创建HTTP Put请求，使用MultipartEntityBuilder构建包含文件和字符串参数的实体，以及执行请求并处理响应。

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public void uploadFile(String url,String fileName) throws Exception{
    CloseableHttpClient httpclient = HttpClients.createDefault();
    try {
        HttpPut httpput = new HttpPut(url);

        FileBody bin = new FileBody(new File(fileName));
        StringBody comment = new StringBody("A binary file of some kind", ContentType.TEXT_PLAIN);

        HttpEntity reqEntity = MultipartEntityBuilder.create()
                .addPart("bin", bin)
                .addPart("comment", comment)
                .build();


        httpput.setEntity(reqEntity);

        System.out.println("executing request " + httpput.getRequestLine());
        CloseableHttpResponse response = httpclient.execute(httpput);
        try {
            System.out.println("----------------------------------------");
            System.out.println(response.getStatusLine());
            HttpEntity resEntity = response.getEntity();
            if (resEntity != null) {
                System.out.println("Response content length: " +    resEntity.getContentLength());
            }
            EntityUtils.consume(resEntity);
        } finally {
            response.close();
        }
    } finally {
        httpclient.close();
    }

}

一下是pom中需要用到的依赖
<!-- -- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient --> -->
<dependency>
    <groupId>Id>org.apache.httpcomponentnents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.6</version>
</dependency>
<!-- -- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpmime --> -->
<dependency>
    <groupId>Id>org.apache.httpcomponentnents</groupId>
    <artifactId>httpmime</artifactId>
    <version>4.5.6</version>