如何用Java通过POST方法向HTTP接口传递数据

这是core java2的例子

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URLConnection connection = url.openConnection();//url为http服务器地址

connection.setDoOutput(true);

PrintWriter out

= new PrintWriter(connection.getOutputStream());//获得输出流

//向服务器传递参数

Enumeration enum = nameValuePairs.keys();

while (enum.hasMoreElements())

{ String name = (String)enum.nextElement();

String value = nameValuePairs.getProperty(name);

char ch;

if (enum.hasMoreElements()) ch = ''; else ch = '\n';

out.print(name + "="

+ URLEncoder.encode(value) + ch);

System.out.println(name+ value);

}

out.close();

//获取输入流

BufferedReader in;

try

{ in = new BufferedReader(new

InputStreamReader(connection.getInputStream()));

}

catch (FileNotFoundException exception)

{ InputStream err

= ((HttpURLConnection)connection).getErrorStream();

if (err == null) throw exception;

in = new BufferedReader(new InputStreamReader(err));

}

StringBuffer response = new StringBuffer();

String line;

//读取数据

while ((line = in.readLine()) != null)

response.append(line + "\n");

in.close();

return response.toString();

}

}

如何用Java通过POST方法向HTTP接口传递数据？

这是corejava2的例子\x0d\x0aURLConnectionconnection=url.openConnection();//url为http服务器地址\x0d\x0aconnection.setDoOutput(true);\x0d\x0aPrintWriterout\x0d\x0a=newPrintWriter(connection.getOutputStream());//获得输出流\x0d\x0a//向服务器传递参数\x0d\x0aEnumerationenum=nameValuePairs.keys();\x0d\x0awhile(enum.hasMoreElements())\x0d\x0a{Stringname=(String)enum.nextElement();\x0d\x0aStringvalue=nameValuePairs.getProperty(name);\x0d\x0acharch;\x0d\x0aif(enum.hasMoreElements())ch='';elsech='\n';\x0d\x0aout.print(name+"="\x0d\x0a+URLEncoder.encode(value)+ch);\x0d\x0aSystem.out.println(name+value);\x0d\x0a}\x0d\x0a\x0d\x0aout.close();\x0d\x0a//获取输入流\x0d\x0aBufferedReaderin;\x0d\x0atry\x0d\x0a{in=newBufferedReader(new\x0d\x0aInputStreamReader(connection.getInputStream()));\x0d\x0a}\x0d\x0acatch(FileNotFoundExceptionexception)\x0d\x0a{InputStreamerr\x0d\x0a=((HttpURLConnection)connection).getErrorStream();\x0d\x0aif(err==null)throwexception;\x0d\x0ain=newBufferedReader(newInputStreamReader(err));\x0d\x0a}\x0d\x0aStringBufferresponse=newStringBuffer();\x0d\x0aStringline;\x0d\x0a//读取数据\x0d\x0awhile((line=in.readLine())!=null)\x0d\x0aresponse.append(line+"\n");\x0d\x0a\x0d\x0ain.close();\x0d\x0areturnresponse.toString();\x0d\x0a}\x0d\x0a}

在Java程序里面，我想把一个接口的数据传递到下一个接口，请问应该在第一个接口的实现的类中怎么写？

按道理这样应该就可以了，如果不行你这样试试：

public

interface

MService

{

double

m(double

n1,

double

n2,

double

n3);

}

public

interface

DService

{

double

d(double

n2,

double

n3);

}

public

class

Milling

implements

MService

{

private

DService

d;

MService

ms

=

new

MService

();

d

=

ms.m(double

n1,

double

n2,

double

n3);

........

public

double

m(double

n1,

double

n2,

double

n3)

{

return

n1*40;

}

}

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