JFreeChart饼图传中文链接参数的解决方法

网上有很多JFreeChart饼图的实例,都是用中文做的pieDataset

如:

pieDataset.setValue("苹果", 100); 
pieDataset.setValue("梨子", 200);   
pieDataset.setValue("葡萄", 300);  
pieDataset.setValue("香蕉", 400);  
pieDataset.setValue("荔枝", 500); 

plot.setURLGenerator(new StandardPieURLGenerator("view.jsp","fruit"));

 

 

在使用指定链接中就会出现参数在接受后成为乱码

解决这个方法,MJ查看JFREECHART的源代码后,发现是用UTF-8编码

那么接收的时候转成GBK就可以了:

<%@ page language="java" contentType="text/html; charset=GBK" %><%! public String utf8Togb2312(String str){ StringBuffer sb = new StringBuffer(); for(int i=0; i<str.length(); i++) { char c = str.charAt(i); switch (c) { case '+': sb.append(' '); break; case '%': try { sb.append((char)Integer.parseInt( str.substring(i+1,i+3),16)); } catch (NumberFormatException e) { throw new IllegalArgumentException(); } i += 2; break; default: sb.append(c); break; } } // Undo conversion to external encoding String result = sb.toString(); String res=null; try{ byte[] inputBytes = result.getBytes("8859_1"); res= new String(inputBytes,"UTF-8"); } catch(Exception e){} return res;}%><%request.setCharacterEncoding("GBK");String section = nullTostr(request.getParameter("fruit")) ;section = utf8Togb2312(section);out.print(section);%>