Charts for web application

Question

Does anyone know any good chart api for a web application in java? This question might be asked earlier. What I am looking for , where I can offer different chart options to user for reports and then they can use any chart they want?

Answer 1

amcharts

it's good, but not free and uses Flash.

JFreeChart

is free.

Google Charts API

Answer 2

谷歌图表API相当不错（更多信息在这里 。）如果您愿意在服务器上使用JFreeChart ，也可以使用JFreeChart 。

Answer 3

I think the Google API looks great, but what about SSL warnings? If my users are running SSL against my servers, then fetching an image from http(s)://chart.apis.google.com... will generate an SSL warning, which looks unprofessional.

Is there any way to come around that? One way I could imagine would be to fetch the image serverside, and the stream it out to the browser. The browser would have an image tag like:

<img src="myownserver.com/chart?somedescriptive=parameters.../>

And when getting this request on my server I would generate a call to Googles API, get the image, and then stream it out, as if was my own file.

But are there any other way to avoid SSL warnings?