JUtils plugin
This plugin provides utility methods to generate copy constructors and toString() methods.
Project homepage: http://eclipse-jutils.sourceforge.net/
There is no auto-install URL... just download the zip, and then put the contents in the plugins directory.
When you're done, you'll get a new JUtils menu at the very bottom of the context menu. The format probably won't match what you want (huge Javadoc, for instance). Edit it at Window >> Preferences >> JUtils >> toString()
Here are my templates:
1. Javadoc
/** String representation of this object. */
2. Method body
public String toString() {
final String tab = " ";
StringBuffer retValue = new StringBuffer();
retValue.append("${class_name} ( ")
.append(super.toString()).append(tab)
.append("${attribute} = ").append(this.${attribute}).append(tab)
.append(" )");
return retValue.toString();
}