您可以使用Apache Commons Beanutils。这是一个简单的例子：
package at.percom.temp.zztests;import java.lang.reflect.InvocationTargetException;import org.apache.commons.beanutils.BeanMap;import org.apache.commons.beanutils.PropertyUtilsBean;import java.util.Arrays;import java.util.HashSet;import java.util.Objects;import java.util.Set;public class Main { public static void main(String[] args) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException { Main main = new Main(); main.start(); } public void start() throws IllegalAccessException, InvocationTargetException, NoSuchMethodException { SampleBean oldSample = new SampleBean("John", "Doe", 1971); SampleBean newSample = new SampleBean("John X.", "Doe", 1971); SampleBean diffSample = (SampleBean) compareObjects(oldSample, newSample, new HashSet<>(Arrays.asList("lastName")), 10L); }public Object compareObjects(Object oldObject, Object newObject, Set<String> propertyNamesToAvoid, Long deep) { return compareObjects(oldObject, newObject, propertyNamesToAvoid, deep, null);}private Object compareObjects(Object oldObject, Object newObject, Set<String> propertyNamesToAvoid, Long deep, String parentPropertyPath) { propertyNamesToAvoid = propertyNamesToAvoid != null ? propertyNamesToAvoid : new HashSet<>(); parentPropertyPath = parentPropertyPath != null ? parentPropertyPath : ""; Object diffObject = null; try { diffObject = oldObject.getClass().newInstance(); } catch (Exception e) { return diffObject; } BeanMap map = new BeanMap(oldObject); PropertyUtilsBean propUtils = new PropertyUtilsBean(); for (Object propNameObject : map.keySet()) { String propertyName = (String) propNameObject; String propertyPath = parentPropertyPath + propertyName; if (!propUtils.isWriteable(diffObject, propertyName) || !propUtils.isReadable(newObject, propertyName) || propertyNamesToAvoid.contains(propertyPath)) { continue; } Object property1 = null; try { property1 = propUtils.getProperty(oldObject, propertyName); } catch (Exception e) { } Object property2 = null; try { property2 = propUtils.getProperty(newObject, propertyName); } catch (Exception e) { } try { if (property1 != null && property2 != null && property1.getClass().getName().startsWith("com.racing.company") && (deep == null || deep > 0)) { Object diffProperty = compareObjects(property1, property2, propertyNamesToAvoid, deep != null ? deep - 1 : null, propertyPath + "."); propUtils.setProperty(diffObject, propertyName, diffProperty); } else { if (!Objects.deepEquals(property1, property2)) { propUtils.setProperty(diffObject, propertyName, property2); System.out.println("> " + propertyPath + " is different (oldValue="" + property1 + "", newValue="" + property2 + "")"); } else { System.out.println(" " + propertyPath + " is equal"); } } } catch (Exception e) { } } return diffObject;} public class SampleBean { public String firstName; public String lastName; public int yearOfBirth; public SampleBean(String firstName, String lastName, int yearOfBirth) { this.firstName = firstName; this.lastName = lastName; this.yearOfBirth = yearOfBirth; } public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public int getYearOfBirth() { return yearOfBirth; } }}
