Tomcat start Error: Unsupported Major.minor version 51.0

After adding items in MyEclipse, find project start times wrong: unsupported Major.minor version 51.0

Because the JDK version that Tomcat uses does not support the JDK version of your project, you need to configure several versions in MyEclipse:

1. Configuring the JRE in MyEclipse

1. Configure Java Compiler level

1. Compilor level of the configuration item

1. Configuring the JDK for Tomcat

Preferences->myeclipse->server->tomcat->tomcat7.0->jdk

Then select the corresponding version of the JDK that you configured earlier.

Tomcat start Error: Unsupported Major.minor version 51.0