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Commit 5663c29

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read-convert-an-inputstream-to-a-string
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‎README.md‎

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* [Java是按值传递还是按引用传递](https://github.com/giantray/stackoverflow-java-top-qa/blob/master/contents/is-java-pass-by-reference-or-pass-by-value.md)
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* [Java += 操作符实质](https://github.com/giantray/stackoverflow-java-top-qa/blob/master/contents/java-operator.md)
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*[将InputStream转换为String](https://github.com/giantray/stackoverflow-java-top-qa/blob/master/read-convert-an-inputstream-to-a-string.md)
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> 代码规范
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- [Why is subtracting these two times (in 1927) giving a strange result?](http://stackoverflow.com/questions/6841333/why-is-subtracting-these-two-times-in-1927-giving-a-strange-result)
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- [Proper use cases for Android UserManager.isUserAGoat()?](http://stackoverflow.com/questions/13375357/proper-use-cases-for-android-usermanager-isuseragoat)
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- [Differences between HashMap and Hashtable?](http://stackoverflow.com/questions/40471/differences-between-hashmap-and-hashtable)
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- [Read/convert an InputStream to a String](http://stackoverflow.com/questions/309424/read-convert-an-inputstream-to-a-string)
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- [Creating a memory leak with Java [closed]](http://stackoverflow.com/questions/6470651/creating-a-memory-leak-with-java)
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- [Iterate through a HashMap [duplicate]](http://stackoverflow.com/questions/1066589/iterate-through-a-hashmap)
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- [Create ArrayList (ArrayList<T>) from array (T[])](http://stackoverflow.com/questions/157944/create-arraylist-arraylistt-from-array-t)
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##将InputStream转换为String
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###使用Apache库
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不重复造轮子。最靠谱的方法,还是用Apache commons IOUtils
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这样简单几行代码就搞定了
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```java
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StringWriter writer = new StringWriter();
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IOUtils.copy(inputStream, writer, encoding);
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String theString = writer.toString();
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```
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或者
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String theString = IOUtils.toString(inputStream, encoding)//这个方法其实封装了上面的方法,减少了一个参数
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###使用原生库
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如果不想引入Apache库,也可以这样做
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```java
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static String convertStreamToString(java.io.InputStream is) {
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java.util.Scanner s = new java.util.Scanner(is).useDelimiter("\\A");
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return s.hasNext() ? s.next() : "";
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}
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```
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stackoverflow讨论地址
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http://stackoverflow.com/questions/309424/read-convert-an-inputstream-to-a-string

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