我需要在设定的货币之间进行转换。 我找到了一个简单的教程:http://blog.caplin.com/2011/01/06/simple-currency-conversion-using-google-calculator-and-java/
这是我的代码:(我顺便导入gson库)
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import com.google.gson.Gson;
public class SeedGenerator
{
static class Result
{
private String lhs;
private String rhs;
public String getLhs()
{
return lhs;
}
public String getRhs()
{
return rhs;
}
public void setLhs(String lhs)
{
this.lhs = lhs;
}
public void setRhs(String rhs)
{
this.rhs = rhs;
}
}
public static void main(String[] args) throws Exception
{
String google = "http://www.google.com/ig/calculator?hl=en&q=";
String baseCurrency = "GBP";
String termCurrency = "AUD";
String charset = "UTF-8";
URL url = new URL(google + baseCurrency + "%3D%3F" + termCurrency);
Reader reader = new InputStreamReader(url.openStream(), charset);
Result result = (Result) new Gson().fromJson(reader, Result.class);
// Get the value without the term currency.
String amount = result.getRhs().split("\\s+")[0];
System.out.println(amount);
}
}
我收到了错误:
Exception in thread "main" java.io.FileNotFoundException: http://www.google.com/ig/calculator?hl=en&q=GBP%3D%3FAUD
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.URL.openStream(Unknown Source)
at SeedGenerator.main(SeedGenerator.java:45)
有人可以解释一下我做错了什么。我认为这可能是实际URL的问题。我可能使用了错误的吗?
提前致谢
答案 0 :(得分:0)
这是使用correct URL的正确String
结构:
"https://www.google.com/finance/converter?a="
+ toConvert + "&from="
+ firstCurrency + "&to"
+ secondCurrency;