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表单普通字段
原始数据 复制代码
public class FormFieldKeyValuePair {
private static final long serialVersionUID = 1L;
// The form field used for receivinguser's input,
// such as "username" in "<inputtype="text" name="username"/>"
private String key;
// The value entered by user in thecorresponding form field,
// such as "Patrick" the abovementioned formfield "username"
private String value;
public FormFieldKeyValuePair(String key, String value)
{
this.key = key;
this.value = value;
}
public String getKey()
{
return key;
}
public void setKey(String key) {
this.key = key;
}
public String getValue()
{
return value;
}
public void setValue(String value)
{
this.value = value;
}
}
表单文件
原始数据 复制代码
import java.io.Serializable;
public class UploadFileItem implements Serializable {
private static final long serialVersionUID = 1L;
// The form field name in a form used foruploading a file,
// such as "upload1" in "<inputtype="file" name="upload1"/>"
private String formFieldName;
// File name to be uploaded, thefileName contains path,
// such as "E:\\some_file.jpg"
private String fileName;
public UploadFileItem(String formFieldName, String fileName)
{
this.formFieldName = formFieldName;
this.fileName = fileName;
}
public String getFormFieldName()
{
return formFieldName;
}
public void setFormFieldName(String formFieldName)
{
this.formFieldName = formFieldName;
}
public String getFileName()
{
return fileName;
}
public void setFileName(String fileName)
{
this.fileName = fileName;
}
}
模拟表单的类
原始数据 复制代码
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
public class HttpPostEmulator {
// 每个post参数之间的分隔。随意设定,只要不会和其他的字符串重复即可。
private static final String BOUNDARY = "----------HV2ymHFg03ehbqgZCaKO6jyH";
public String sendHttpPostRequest(String serverUrl,
ArrayList<FormFieldKeyValuePair> generalFormFields,
ArrayList<UploadFileItem> filesToBeUploaded) throws Exception {
// 向服务器发送post请求
URL url = new URL(serverUrl/* "http://127.0.0.1:8080/test/upload" */);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
// 发送POST请求必须设置如下两行
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setUseCaches(false);
connection.setRequestMethod("POST");
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setRequestProperty("Charset", "UTF-8");
connection.setRequestProperty("Content-Type",
"multipart/form-data; boundary=" + BOUNDARY);
// 头
String boundary = BOUNDARY;
// 传输内容
StringBuffer contentBody = new StringBuffer("--" + BOUNDARY);
// 尾
String endBoundary = "\r\n--" + boundary + "--\r\n";
OutputStream out = connection.getOutputStream();
// 1. 处理文字形式的POST请求
for (FormFieldKeyValuePair ffkvp : generalFormFields)
{
contentBody.append("\r\n")
.append("Content-Disposition: form-data; name=\"")
.append(ffkvp.getKey() + "\"")
.append("\r\n")
.append("\r\n")
.append(ffkvp.getValue())
.append("\r\n")
.append("--")
.append(boundary);
}
String boundaryMessage1 = contentBody.toString();
out.write(boundaryMessage1.getBytes("utf-8"));
// 2. 处理文件上传
for (UploadFileItem ufi : filesToBeUploaded)
{
contentBody = new StringBuffer();
contentBody.append("\r\n")
.append("Content-Disposition:form-data; name=\"")
.append(ufi.getFormFieldName() + "\"; ") // form中field的名称
.append("filename=\"")
.append(ufi.getFileName() + "\"") // 上传文件的文件名,包括目录
.append("\r\n")
.append("Content-Type:application/octet-stream")
.append("\r\n\r\n");
String boundaryMessage2 = contentBody.toString();
out.write(boundaryMessage2.getBytes("utf-8"));
// 开始真正向服务器写文件
File file = new File(ufi.getFileName());
DataInputStream dis = new DataInputStream(new FileInputStream(file));
int bytes = 0;
byte[] bufferOut = new byte[(int) file.length()];
bytes = dis.read(bufferOut);
out.write(bufferOut, 0, bytes);
dis.close();
contentBody.append("------------HV2ymHFg03ehbqgZCaKO6jyH");
String boundaryMessage = contentBody.toString();
out.write(boundaryMessage.getBytes("utf-8"));
// System.out.println(boundaryMessage);
}
out.write("------------HV2ymHFg03ehbqgZCaKO6jyH--\r\n"
.getBytes("UTF-8"));
// 3. 写结尾
out.write(endBoundary.getBytes("utf-8"));
out.flush();
out.close();
// 4. 从服务器获得回答的内容
String strLine = "";
String strResponse = "";
InputStream in = connection.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
while ((strLine = reader.readLine()) != null)
{
strResponse += strLine + "\n";
}
// System.out.print(strResponse);
return strResponse;
}
}
测试代码
原始数据 复制代码
import java.util.ArrayList;
public class Test {
public static void main(String[] args) {
// 设定服务地址
String serverUrl = "http://localhost:8088/api/extension/upload_file";//上传地址
// 设定要上传的普通Form Field及其对应的value
ArrayList<FormFieldKeyValuePair> ffkvp = new ArrayList<FormFieldKeyValuePair>();
// 设定要上传的文件
ArrayList<UploadFileItem> ufi = new ArrayList<UploadFileItem>();
ufi.add(new UploadFileItem("file", "D:\\1.jpg"));
HttpPostEmulator hpe = new HttpPostEmulator();
String response;
try {
response = hpe.sendHttpPostRequest(serverUrl, ffkvp, ufi);
System.out.println("Responsefrom server is: " + response);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

评论列表( 1 )

宋元子 2017-11-02 11:17

哎哟 不错哦!

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