通过继承 MetaBuilder 扩展一下即可，大致如下：
public void MyMetaBuilder extends MetaBuilder {
private Set myTables = new HashSet();
public void addTable(String table) {
myTables.add(table);
}

public boolean isSkip(String table) {
if (myTables.contains(table)) {
return false;
} else {
return true;
}
}

用的时候这样：
MyMetaBuilder mmb = new MyMetaBuilder();
mmb.addTable(要处理的 table);
mmb.setDialect(new MySqlDialect());

Generator gen = new Generator(...);
gen.setMetaBuilder(mmb);
gen.generate();