The way we see the problem is the problem

If you get the below exception when passing parameters like "%" and "&" via AJAX call then use "escape()"


Reason -
The main reasons for such errors are

the special characters like “%, @, $ .. etc” in the GET/POST request from Ajax Call.
Since these characters are used to URL specific function like “&” id used to separate various URL parameters.

Solution -

Example:
If you are passing parameter "notes" then just surround it by escape in javascript

.
.
Var params="notes="+escape(notes)+";
url = "../jsp/processing.jsp?"+params;
UpReq.open("GET",url, true);
UpReq.send(null);
.
.



Even the you get same problem then just have a look at post


org.apache.tomcat.util.http.Parameters processParameters
WARNING: Parameters: Character decoding failed. Parameter skipped.
java.io.CharConversionException: EOF
at org.apache.tomcat.util.buf.UDecoder.convert(UDecoder.java:83)
at org.apache.tomcat.util.buf.UDecoder.convert(UDecoder.java:49)
at org.apache.tomcat.util.http.Parameters.urlDecode(Parameters.java:412)
at org.apache.tomcat.util.http.Parameters.processParameters(Parameters.java:394)
at org.apache.tomcat.util.http.Parameters.processParameters(Parameters.java:510)
at org.apache.tomcat.util.http.Parameters.handleQueryParameters(Parameters.java:267)
at org.apache.catalina.connector.Request.parseParameters(Request.java:2453)
at org.apache.catalina.connector.Request.getParameter(Request.java:1040)
at org.apache.catalina.connector.RequestFacade.getParameter(RequestFacade.java:355)
at org.apache.jsp.Client.jsp.addnotes_jsp._jspService(addnotes_jsp.java:78)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.bredge.fs.util.SessionExpiredFilter.doFilter(SessionExpiredFilter.java:64)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:619)




Labels: org.apache.tomcat.util.http.Parameters processParameters/WARNING: Parameters: Character decoding failed. Parameter skipped/java.io.CharConversionException: isHexDigit