Solution to the No ' access-control-allow-origin ' header problem when accessing the Tomcat Server Web service interface via Ajax

Problem description

When accessing the JSON Web service interface in the Web server (Tomcat7.0.42) through Ajax, the following cross-domain issues are reported:

XMLHttpRequest cannot load http://localhost:8080/get-employees-by-name/name/admin. No ' Access-control-allow-origin ' header is present on the requested resource. Origin ' http://localhost:63342 ' is therefore not allowed access.

Solutions

1. Download the Cors-filter-<version>.jar and Java-property-utils-<version>.jar two jar files and place them under the Classpath path of the Web server. For example, Tomcat Lib.

Cors-filter-2.4.jar Java-property-utils-1.9.1.jar

2. Add corsfilter filter in Web. xml

<Filter>    <Filter-name>Corsfilter</Filter-name>    <Filter-class>Com.thetransactioncompany.cors.CORSFilter</Filter-class></Filter><filter-mapping>      <Filter-name>Corsfilter</Filter-name>      <Url-pattern>/*</Url-pattern></filter-mapping><Filter>

3. Restart the Web server.

Resources

1, Http://stackoverflow.com/questions/17267023/tomcat-7-cors-filter

2, http://software.dzhuvinov.com/cors-filter-installation.html

Solution to the No ' access-control-allow-origin ' header problem when accessing the Tomcat Server Web service interface via Ajax