Java reflection mechanism--get property values based on property name

1. Consider the properties in the security access scope, no access to the property is not read [Java]View PlainCopy

2. /**
4. * Get property values based on property name
6. *
8. * @param fieldName
10. * @param Object
12. * @return
14. */
16. private String Getfieldvaluebyfieldname (string FieldName, Object object) {
18. try {
20. Field field = Object.getclass (). GetField (FieldName);
22. //Set access permissions for objects, guaranteeing access to private properties
26. return (String) Field.get (object);
28. } catch (Exception e) {
32. return null;
34. }
36. }

2. Regardless of the inherited attributes from the ancestor class, get only the current class properties, including the four class access permissions, Private,protect,default,public [Java]View PlainCopy

2. /**
4. * Get property values based on property name
6. *
8. * @param fieldName
10. * @param Object
12. * @return
14. */
16. private String Getfieldvaluebyfieldname (string FieldName, Object object) {
18. try {
20. Field field = Object.getclass (). Getdeclaredfield (FieldName);
22. //Set access permissions for objects, guaranteeing access to private properties
24. Field.setaccessible (true);
26. return (String) Field.get (object);
28. } catch (Exception e) {
32. return null;
34. }
36. }

3. Consider the inherited properties of the parent class, including the four class access rights, Private,protect,default,public

[Java]View PlainCopy

2. /**
4. * Get attribute elements based on attribute name, including various security scopes and all parent classes
6. *
8. * @param fieldName
10. * @param Object
12. * @return
14. */
16. Private Field getfieldbyclasss (String fieldName, Object object) {
18. Field field = null;
20. Class<?> clazz = Object.getclass ();
24. For (; Clazz! = Object.  Class Clazz = Clazz.getsuperclass ()) {
26. try {
28. field = Clazz.getdeclaredfield (FieldName);
30. } catch (Exception e) {
32. //There is nothing to be thrown out here.
34. //If the exception is printed or thrown outward, it will not enter
38. }
40. }
42. return field;
46. }

Java reflection mechanism--get property values based on property name