我要评论接口传输协议：http
接口请求方式：post
数据编码格式：utf-8
数据传输格式：multipart/form-data
需求：使用multipart/form-data格式传输文件到给定接口。
工具类：
import lombok.extern.slf4j.slf4j;
import org.apache.http.consts;
import org.apache.http.httpentity;
import org.apache.http.httpresponse;
import org.apache.http.httpstatus;
import org.apache.http.client.config.requestconfig;
import org.apache.http.client.methods.httppost;
import org.apache.http.client.methods.httprequestbase;
import org.apache.http.conn.ssl.noophostnameverifier;
import org.apache.http.conn.ssl.sslconnectionsocketfactory;
import org.apache.http.conn.ssl.truststrategy;
import org.apache.http.entity.contenttype;
import org.apache.http.entity.mime.httpmultipartmode;
import org.apache.http.entity.mime.multipartentitybuilder;
import org.apache.http.entity.mime.content.stringbody;
import org.apache.http.impl.client.closeablehttpclient;
import org.apache.http.impl.client.httpclientbuilder;
import org.apache.http.ssl.sslcontextbuilder;
import org.apache.http.util.entityutils;
import javax.net.ssl.sslcontext;
import java.io.file;
import java.io.ioexception;
import java.security.cert.certificateexception;
import java.security.cert.x509certificate;
import java.util.hashmap;
import java.util.map;
/**
* <p>
*
* @author 花鼠大师
* @version :1.0
* @date 2024/4/12 15:10
*/
@slf4j
public class sendfileutils {
/**
* 使用multipart/form-data方式传输文件
* 发送文件方法
* @param url 接口地址
* @param file 文件
*/
public static string sendmultipartfile(string url, file file) {
//获取httpclient
closeablehttpclient client = gethttpclient();
httppost httppost = new httppost(url);
fillmethod(httppost,system.currenttimemillis());
// 请求参数配置
requestconfig requestconfig = requestconfig.custom().setsockettimeout(60000).setconnecttimeout(60000)
.setconnectionrequesttimeout(10000).build();
httppost.setconfig(requestconfig);
string res = "";
string filename = file.getname();//文件名
try {
multipartentitybuilder builder = multipartentitybuilder.create();
builder.setcharset(java.nio.charset.charset.forname("utf-8"));
builder.setmode(httpmultipartmode.browser_compatible);
/**
* 假设有两个参数需要传输
* 参数名:filaname 值 "文件名"
* 参数名:file 值:file (该参数值为file对象)
*/
//表单中普通参数
builder.addpart("filaname ",new stringbody("来源", contenttype.create("text/plain", consts.utf_8)));
// 表单中的文件参数 注意，builder.addbinarybody的第一个参数要写参数名
builder.addbinarybody("file", file, contenttype.create("multipart/form-data",consts.utf_8), filename);
httpentity entity = builder.build();
httppost.setentity(entity);
httpresponse response = client.execute(httppost);// 执行提交
if (response.getstatusline().getstatuscode() == httpstatus.sc_ok) {
// 返回响应结果
res = entityutils.tostring(response.getentity(), java.nio.charset.charset.forname("utf-8"));
}else {
res = "响应失败";
log.error("响应失败！");
}
return res;
} catch (exception e) {
e.printstacktrace();
log.error("调用httppost失败！" + e.tostring());
} finally {
if (client != null) {
try {
client.close();
} catch (ioexception e) {
log.error("关闭httppost连接失败！");
}
}
}
log.info("数据传输成功!!!!!!!!!!!!!!!!!!!!");
return res;
}
/**
* 获取httpclient
* @return
*/
private static closeablehttpclient gethttpclient(){
sslcontext sslcontext = null;
try {
sslcontext = new sslcontextbuilder().loadtrustmaterial(null, new truststrategy() {
public boolean istrusted(x509certificate[] arg0, string arg1) throws certificateexception {
return true;
}
}).build();
} catch (exception e) {
e.printstacktrace();
throw new runtimeexception(e);
}
sslconnectionsocketfactory sslconnectionsocketfactory = new sslconnectionsocketfactory(sslcontext,
noophostnameverifier.instance);
closeablehttpclient client = httpclientbuilder.create().setsslsocketfactory(sslconnectionsocketfactory).build();
return client;
}
/**
* 添加头文件信息
* @param requestbase
* @param timestamp
*/
private static void fillmethod(httprequestbase requestbase, long timestamp){
//此处为举例，需要添加哪些头部信息自行添加即可
//设置时间戳,nginx,underscores_in_headers on;放到http配置里，否则nginx会忽略包含"_"的头信息
requestbase.addheader("timestamp",string.valueof(timestamp));
system.out.println(requestbase.getallheaders());
}
}
所需依赖：
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
<dependency>
<groupid>org.apache.httpcomponents</groupid>
<artifactid>httpclient</artifactid>
<version>4.5.13</version>
</dependency>总结
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