problems of digital signature certifate of JAVA 7 under windows system

[sunqj]

1.the software cannot run normally under the java 7 environment, for the java plug-in board cannot run document of self-signature only the limits of authority is lowver

2.the software cannot achieve the function of applying colours to a drawing under java 7 environment, but things get normally under java 6, I try to update sunflow-0.07.3h.jar to sunflow-0.07.3i.jar, but the problems remains that it pointed out that org.sunflow.core.display cannot be founded

[Puybaret]

I guess you're speaking about the Online applet version.

1. the software cannot run normally under the java 7 environment, for the java plug-in board cannot run document of self-signature only the limits of authority is lowver

Yes, self-signed applets are blocked at default (high) security level of Java since JRE 7u51. This actually obliges developers to obtain a real code certificate to deploy Sweet Home 3D Online. If you don't like it, please complain to Oracle but I think there are very little chances that they go back to a less secure level.

2.the software cannot achieve the function of applying colours to a drawing under java 7 environment, but things get normally under java 6, I try to update sunflow-0.07.3h.jar to sunflow-0.07.3i.jar, but the problems remains that it pointed out that org.sunflow.core.display cannot be founded

I'm not sure to understand your problem here. If it's about Sunflow upgrade, don't forget to include its jar file or update it in the applet JNLP file, then generate a Base64 encoded version of the JNLP file and update the jnlp_embedded applet parameter with it.