import com.sun.codemodel.internal.JFieldRef; //导入依赖的package包/类
private void write(Fault fault) throws JClassAlreadyExistsException {
    String className = Names.customExceptionClassName(fault);

    JDefinedClass cls = cm._class(className, ClassType.CLASS);
    JDocComment comment = cls.javadoc();
    if(fault.getJavaDoc() != null){
        comment.add(fault.getJavaDoc());
        comment.add("\n\n");
    }

    for (String doc : getJAXWSClassComment()) {
        comment.add(doc);
    }

    cls._extends(java.lang.Exception.class);

    //@WebFault
    JAnnotationUse faultAnn = cls.annotate(WebFault.class);
    faultAnn.param("name", fault.getBlock().getName().getLocalPart());
    faultAnn.param("targetNamespace", fault.getBlock().getName().getNamespaceURI());

    JType faultBean = fault.getBlock().getType().getJavaType().getType().getType();

    //faultInfo filed
    JFieldVar fi = cls.field(JMod.PRIVATE, faultBean, "faultInfo");

    //add jaxb annotations
    fault.getBlock().getType().getJavaType().getType().annotate(fi);

    fi.javadoc().add("Java type that goes as soapenv:Fault detail element.");
    JFieldRef fr = JExpr.ref(JExpr._this(), fi);

    //Constructor
    JMethod constrc1 = cls.constructor(JMod.PUBLIC);
    JVar var1 = constrc1.param(String.class, "message");
    JVar var2 = constrc1.param(faultBean, "faultInfo");
    constrc1.javadoc().addParam(var1);
    constrc1.javadoc().addParam(var2);
    JBlock cb1 = constrc1.body();
    cb1.invoke("super").arg(var1);

    cb1.assign(fr, var2);

    //constructor with Throwable
    JMethod constrc2 = cls.constructor(JMod.PUBLIC);
    var1 = constrc2.param(String.class, "message");
    var2 = constrc2.param(faultBean, "faultInfo");
    JVar var3 = constrc2.param(Throwable.class, "cause");
    constrc2.javadoc().addParam(var1);
    constrc2.javadoc().addParam(var2);
    constrc2.javadoc().addParam(var3);
    JBlock cb2 = constrc2.body();
    cb2.invoke("super").arg(var1).arg(var3);
    cb2.assign(fr, var2);


    //getFaultInfo() method
    JMethod fim = cls.method(JMod.PUBLIC, faultBean, "getFaultInfo");
    fim.javadoc().addReturn().add("returns fault bean: "+faultBean.fullName());
    JBlock fib = fim.body();
    fib._return(fi);
    fault.setExceptionClass(cls);

}