java 反射输出对象的所有属性

接口调用中经常会打印一些参数的值，但是一个对象的属性太多，一个一个的打印，太麻烦了。
于是就产生了下面的代码。

public String outObjPropertyString(Object obj)
    {
        StringBuffer sb = new StringBuffer();
        if(null != obj)
        {
            try {
                this.getPropertyString(obj, sb);
            }
            catch (Exception e) {
                logger.log("outObjPropertyString is error " + e.getMessage());
                e.printStackTrace();
            }
        }
        return sb.toString();
    }

    public String getPropertyString(Object entityName, StringBuffer sb) throws Exception {
        Class c = entityName.getClass();
        Field field [] = c.getDeclaredFields();
        Object obj = null;
        String classname = "";
        Object tempObj = null;
        sb.append("------ " + " begin ------\n");
        for(Field f : field){

            sb.append(f.getName());
            sb.append(" : ");
            obj = invokeMethod(entityName,f.getName(),f.getType(),null);
            if(null != obj)
            {
                if(obj.getClass().isArray())
                {
                    for (int i=0;i<Array.getLength(obj);i++)
                    {
                        tempObj = Array.get(obj, i);
                        if(tempObj.getClass().isPrimitive())
                        {
                            sb.append(tempObj.toString());
                        }
                        else if(tempObj instanceof String)
                        {
                            sb.append(tempObj.toString());
                        }
                        else if(tempObj instanceof Date)
                        {
                            sb.append(tempObj.toString());
                        }
                        else if(tempObj instanceof Number)
                        {
                            sb.append(tempObj.toString());
                        }
                        else
                        {
                            this.getPropertyString(tempObj , sb);
                        }
                    }
                }

                classname = obj.getClass().getName();
                if(classname.indexOf("com.cignacmb.core.model.") > -1)
                {
                    this.getPropertyString(obj , sb);
                }

            }

            /*if (f.getType() == Address.class)
            {
                this.getPropertyString(obj , sb);
            }*/

            sb.append(obj);
            sb.append("\n");
        }
        sb.append("------ " + " end ------\n");
        return sb.toString();
    }


    public Object invokeMethod(Object owner, String methodName, Class fieldType, Object[] args) throws Exception{
        Class ownerClass = owner.getClass();

        methodName = methodName.substring(0, 1).toUpperCase() + methodName.substring(1);
        Method method = null;
        try {
            if(fieldType == boolean.class)
            {
                method = ownerClass.getMethod("is" + methodName);
            }
            else
            {
                method = ownerClass.getMethod("get" + methodName);
            }
        } catch (SecurityException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            //e.printStackTrace();

            return " can't find 'get" + methodName + "' method";
        }

        return method.invoke(owner);

    }