获取Java对象中所有的属性名称和属性值

1，首先我们创建一个Java实体类Person,并创建属性name,age,gender,代码如下：

public class Person {
private String name;
private int age;
private String gender;

public Person(String n,int a,String g) {
name = n;
age = a;
gender = g;
}

public String getName() {
return name;
}

public int getAge() {
return age;
}
public String getGender() {
return gender;
}
}

 

2、创建对象

Person person = new Person("zhangsan", 30, "男");

3、创建获取属性数组的方法

/**
* 获取属性名数组
* */
private static String[] getFiledName(Object o){
Field[] fields=o.getClass().getDeclaredFields();
String[] fieldNames=new String[fields.length];
for(int i=0;i<fields.length;i++){
// System.out.println(fields[i].getType());
fieldNames[i]=fields[i].getName();
}
return fieldNames;
}

 

4，根据属性名称获取对应的属性值（通过get方法）

/* 根据属性名获取属性值
* */
private static Object getFieldValueByName(String fieldName, Object o) {
try {
String firstLetter = fieldName.substring(0, 1).toUpperCase();
String getter = "get" + firstLetter + fieldName.substring(1);
Method method = o.getClass().getMethod(getter, new Class[] {});
Object value = method.invoke(o, new Object[] {});
return value;
} catch (Exception e) {

return null;
}
}

　　

5、完美调用

StringBuilder sbName = new StringBuilder();
StringBuilder sbValue = new StringBuilder();
String[] fieldNames = getFiledName(person);

for(int j=0 ; j<fieldNames.length ; j++){ //遍历所有属性
String name = fieldNames[j]; //获取属性的名字
Object value = getFieldValueByName(name,person);
sbName.append(name);
sbValue.append(value);
if(j != fieldNames.length - 1) {
sbName.append("/");
sbValue.append("/");
}


}

System.out.println("attribute name:"+sbName.toString());
System.out.println("attribute value:"+sbValue.toString());

 

6、打印结果：

attribute name:name/age/gender
attribute value:zhangsan/30/男