文件下载保存到本地

寒冰意志 2008-12-29 12:23:08

保存网络文件【百度的图片】到本地保存成功后，说格式不对，打开代码是

<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<head>
<meta http-equiv="Cache-Control" content="max-age=0" forua="true"/>
<meta http-equiv="Cache-Control" content="no-cache" forua="true"/>
<meta http-equiv="Cache-Control" content="must-revalidate" forua="true"/>
</head>
<card id="card" title="" >
<onevent type="onenterforward">
<go href="http://wap.baidu.com/r/wise/wapsearchindex/logoindex.jpg?t=00578"></go></onevent>
</card>
</wml>

有人见过吗，这是什么问题吗。

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lxf209 2009-03-09

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可参考MID Profile, 用POST方式访问，
os.flush() 在真机中记得加上，模拟器中要注释掉

void postViaHttpConnection(String url) throws IOException {
HttpConnection c = null;
InputStream is = null;
OutputStream os = null;

try {
c = (HttpConnection)Connector.open(url);

// Set the request method and headers
c.setRequestMethod(HttpConnection.POST);
c.setRequestProperty("If-Modified-Since",
"29 Oct 1999 19:43:31 GMT");
c.setRequestProperty("User-Agent",
"Profile/MIDP-1.0 Configuration/CLDC-1.0");
c.setRequestProperty("Content-Language", "en-US");

// Getting the output stream may flush the headers
os = c.openOutputStream();
os.write("LIST games\n".getBytes());
os.flush(); // Optional, openInputStream will flush

// Opening the InputStream will open the connection
// and read the HTTP headers. They are stored until
// requested.
is = c.openInputStream();

// Get the ContentType
String type = c.getType();
processType(type);

// Get the length and process the data
int len = (int)c.getLength();
if (len > 0) {
byte[] data = new byte[len];
int actual = is.read(data);
process(data);
} else {
int ch;
while ((ch = is.read()) != -1) {
process((byte)ch);
}
}
} finally {
if (is != null)
is.close();
if (os != null)
os.close();
if (c != null)
c.close();
}
}

lixiurui 2009-02-12

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那个是移动的资费提醒页面，把请求重发一次就能获取到数据了

stanleystanley 2009-02-11

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用cmnet就没有这个问题了

yesvery 2009-02-07

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关注中

dxj1234 2009-02-06

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是否是网络设置的问题，换成cmnet的网络试试，可能真机上选的是cmwap网络，访问了wap网关，baidu可能没有在wap网提供这个服务。

（楼上写的代码不是一样的功能嘛？）

cccloveyf 2009-01-05

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import javax.microedition.midlet.*;

import javax.microedition.io.*;

import javax.microedition.io.file.*;

import java.io.*;



public class Midlet1 extends MIDlet {



    private static Midlet1 instance;



    public Midlet1() {

        instance = this;

    }



    public void startApp() {

        try {

            String url = "http://wap.baidu.com/r/wise/wapsearchindex/logoindex.jpg";

            String root = System.getProperty("fileconn.dir.photos") + "baidu.jpg";

            HttpConnection connection = (HttpConnection) Connector.open(url);

            int state = connection.getResponseCode();

            if (state == HttpConnection.HTTP_OK) {

                InputStream is = connection.openInputStream();

                ByteArrayOutputStream baos = new ByteArrayOutputStream();

                byte[] b = new byte[1024];

                int count = is.read(b);

                while (count > 0) {

                    baos.write(b, 0, count);

                    count = is.read(b);

                }



                byte[] buffer = baos.toByteArray();

                FileConnection fc = (FileConnection) Connector.open(root, Connector.READ_WRITE);

                if (!fc.exists()) {

                    fc.create();

                    OutputStream out = fc.openOutputStream();

                    out.write(buffer);

                    out.flush();

                    out.close();

                }

                fc.close();

            }

            connection.close();

        } catch (IOException ex) {

            ex.printStackTrace();

        }

        quitApp();

    }



    public void pauseApp() {

    }



    public void destroyApp(boolean unconditional) {

    }



    public static void quitApp() {

        instance.destroyApp(true);

        instance.notifyDestroyed();

        instance = null;

    }

}

noenoughmemory 2008-12-29

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帮顶

寒冰意志 2008-12-29

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在模拟器上没问题，真机器上就不行。
public void startApp() {
try {
display = Display.getDisplay(this);
String url = "http://wap.baidu.com/r/wise/wapsearchindex/logoindex.jpg";
String root = "file:///c:/Images/baidu.jpg";
HttpConnection hc = (HttpConnection) Connector.open(url);

int state = hc.getResponseCode();
if(state == HttpConnection.HTTP_OK){
InputStream is = hc.openInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();

byte[] buffer = null;
int chr = 0;
while((chr=is.read())!=-1){
baos.write(chr);
}

buffer = baos.toByteArray();
FileConnection fc = (FileConnection) Connector.open( root, Connector.READ_WRITE);
fc.create();
OutputStream out = fc.openOutputStream();
out.write(buffer);
out.flush();
out.close();
fc.close();
}

} catch (IOException ex) {
ex.printStackTrace();
}
}

代码比较粗糙。主要是为了测试。

在 hc.getHeaderField("content-type"); 在真机上是 "text/vnd.wap.wml" 在模拟器上是 "image/jpeg"

cccloveyf 2008-12-29

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你的代码贴过来看看。
我请求http://wap.baidu.com/r/wise/wapsearchindex/logoindex.jpg?t=00578地址没问题。
送过来的直接就是一个图片，没有WAP页啊。
content-type:image/jpeg
content-length:3897
server:Apache

寒冰意志 2008-12-29

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我改成 http://wap.baidu.com/r/wise/wapsearchindex/logoindex.jpg?t=00578

xml 又变成

<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<head>
<meta http-equiv="Cache-Control" content="max-age=0" forua="true"/>
<meta http-equiv="Cache-Control" content="no-cache" forua="true"/>
<meta http-equiv="Cache-Control" content="must-revalidate" forua="true"/>
</head>
<card id="card" title="" >
<onevent type="onenterforward">
<go href="http://wap.baidu.com/r/wise/wapsearchindex/logoindex.jpg?t=00578&t=49168"></go></onevent>
</card>
</wml>

谁能告诉我这是什么原因呢。

寒冰意志 2008-12-29