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  • java中遍历实体类属性和类型

    public static void testReflect(Object model) throws NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException{
            Field[] field = model.getClass().getDeclaredFields();        //获取实体类的所有属性,返回Field数组  
            for(int j=0 ; j<field.length ; j++){     //遍历所有属性
                    String name = field[j].getName();    //获取属性的名字    
                    System.out.println("attribute name:"+name);     
                    name = name.substring(0,1).toUpperCase()+name.substring(1); //将属性的首字符大写,方便构造get,set方法
                    String type = field[j].getGenericType().toString();    //获取属性的类型
                    if(type.equals("class java.lang.String")){   //如果type是类类型,则前面包含"class ",后面跟类名
                        Method m = model.getClass().getMethod("get"+name);
                        String value = (String) m.invoke(model);    //调用getter方法获取属性值
                        if(value != null){
                            System.out.println("attribute value:"+value);
                        }
                    }
                    if(type.equals("class java.lang.Integer")){     
                        Method m = model.getClass().getMethod("get"+name);
                        Integer value = (Integer) m.invoke(model);
                        if(value != null){
                            System.out.println("attribute value:"+value);
                        }
                    }
                    if(type.equals("class java.lang.Short")){     
                        Method m = model.getClass().getMethod("get"+name);
                        Short value = (Short) m.invoke(model);
                        if(value != null){
                            System.out.println("attribute value:"+value);                    }
                    }       
                    if(type.equals("class java.lang.Double")){     
                        Method m = model.getClass().getMethod("get"+name);
                        Double value = (Double) m.invoke(model);
                        if(value != null){                    
                            System.out.println("attribute value:"+value);  
                        }
                    }                  
                    if(type.equals("class java.lang.Boolean")){
                        Method m = model.getClass().getMethod("get"+name);    
                        Boolean value = (Boolean) m.invoke(model);
                        if(value != null){                      
                            System.out.println("attribute value:"+value);
                        }
                    }
                    if(type.equals("class java.util.Date")){
                        Method m = model.getClass().getMethod("get"+name);                    
                        Date value = (Date) m.invoke(model);
                        if(value != null){
                            System.out.println("attribute value:"+value.toLocaleString());
                        }
                    }                
                }
        }
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  • 原文地址:https://www.cnblogs.com/henuyuxiang/p/7149316.html
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