Android 从网络中获取数据时产生部分数据乱码的解决

来源：互联网发布：php erp管理系统编辑：程序博客网时间：2024/05/17 22:01

转载请表明出处：http://blog.csdn.net/lmj623565791/article/details/23562939

问题描述：从网络中抓取html页面进行解析，解析后发现产生部分中文乱码。

由来：制作csdn客户端时产生， http://blog.csdn.net/lmj623565791/article/details/23532797 （java环境下，使用控制台打印出是没有乱码）

于是立马检查从服务器读取的代码：

[java] view plain copy

print?

<span style=“font-size:18px;”> /**
* 返回该链接地址的html数据
*
* @param urlStr
* @return
* @throws CommonException
*/
public static String doGet(String urlStr) throws CommonException
{
StringBuffer sb = new StringBuffer();
try
{
URL url = new URL(urlStr);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod(”GET”);
conn.setConnectTimeout(5000);
conn.setDoInput(true);
conn.setDoOutput(true);
if (conn.getResponseCode() == 200)
{
InputStream is = conn.getInputStream();
int len = 0;
byte[] buf = new byte[1024];
while ((len = is.read(buf)) != -1)
{
sb.append(new String(buf, 0, len, “UTF-8”));
}
is.close();
} else
{
throw new CommonException(“访问网络失败！”);
}
} catch (Exception e)
{
throw new CommonException(“访问网络失败！”);
}
return sb.toString();
}
</span>

    /**     * 返回该链接地址的html数据     *      * @param urlStr     * @return     * @throws CommonException     */    public static String doGet(String urlStr) throws CommonException    {        StringBuffer sb = new StringBuffer();        try        {            URL url = new URL(urlStr);            HttpURLConnection conn = (HttpURLConnection) url.openConnection();            conn.setRequestMethod("GET");            conn.setConnectTimeout(5000);            conn.setDoInput(true);            conn.setDoOutput(true);            if (conn.getResponseCode() == 200)            {                InputStream is = conn.getInputStream();                int len = 0;                byte[] buf = new byte[1024];                while ((len = is.read(buf)) != -1)                {                    sb.append(new String(buf, 0, len, "UTF-8"));                }                is.close();            } else            {                throw new CommonException("访问网络失败！");            }        } catch (Exception e)        {            throw new CommonException("访问网络失败！");        }        return sb.toString();    }

发现可能是由于我采用字节流从网络读取数据，且每次读取1024个字节，读取完成后能后强制转化为字符串，又因为使用编码为UTF-8，UTF-8是一种变长码（英文1个字节，中文两个字节），所以1024可能会造成刚好截取了某个汉字的一半（前一个字节），然后转化为字符串时造成乱码。唯一不理解的在java环境下，使用控制台打印出是没有乱码的。如果你有不同的理解欢迎留言探讨。

于是把读取数据的代码从字节流改成字符流，修改后的代码为：

[java] view plain copy

print?

<span style=“font-size:18px;”> /**
* 返回该链接地址的html数据
*
* @param urlStr
* @return
* @throws CommonException
*/
public static String doGet(String urlStr) throws CommonException
{
StringBuffer sb = new StringBuffer();
try
{
URL url = new URL(urlStr);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod(”GET”);
conn.setConnectTimeout(5000);
conn.setDoInput(true);
conn.setDoOutput(true);
if (conn.getResponseCode() == 200)
{
InputStream is = conn.getInputStream();
InputStreamReader isr = new InputStreamReader(is,“UTF-8”);
int len = 0;
char[] buf = new char[1024];
while ((len = isr.read(buf)) != -1)
{
sb.append(new String(buf, 0, len));
}
is.close();
isr.close();
} else
{
throw new CommonException(“访问网络失败！”);
}
} catch (Exception e)
{
throw new CommonException(“访问网络失败！”);
}
return sb.toString();
}
</span>

 /**     * 返回该链接地址的html数据     *      * @param urlStr     * @return     * @throws CommonException     */    public static String doGet(String urlStr) throws CommonException    {        StringBuffer sb = new StringBuffer();        try        {            URL url = new URL(urlStr);            HttpURLConnection conn = (HttpURLConnection) url.openConnection();            conn.setRequestMethod("GET");            conn.setConnectTimeout(5000);            conn.setDoInput(true);            conn.setDoOutput(true);            if (conn.getResponseCode() == 200)            {                InputStream is = conn.getInputStream();                InputStreamReader isr = new InputStreamReader(is,"UTF-8");                int len = 0;                char[] buf = new char[1024];                while ((len = isr.read(buf)) != -1)                {                    sb.append(new String(buf, 0, len));                }                is.close();                isr.close();            } else            {                throw new CommonException("访问网络失败！");            }        } catch (Exception e)        {            throw new CommonException("访问网络失败！");        }        return sb.toString();    }

问题解决。

转自:http://blog.csdn.net/lmj623565791/article/details/23562939

阅读全文

0 0

Android 从网络中获取数据时 产生部分数据乱码的解决

Android 从网络中获取数据时产生部分数据乱码的解决