Here you can find the source of setFieldValue(Object target, String fieldName, String fieldValue)
static void setFieldValue(Object target, String fieldName, String fieldValue)
//package com.java2s; /*/* w w w. j a v a 2 s . co m*/ * Copyright 2002-2016 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.lang.reflect.Field; public class Main { static void setFieldValue(Object target, String fieldName, String fieldValue) { Field field = getField(target, fieldName); if (field != null) { field.setAccessible(true); try { field.set(target, fieldValue); } catch (IllegalAccessException e) { throw new RuntimeException(e); } } } static Field getField(Object target, String fieldName) { Field field = null; for (Class<?> clazz = target.getClass(); clazz != Object.class; clazz = clazz.getSuperclass()) { try { field = clazz.getDeclaredField(fieldName); break; } catch (NoSuchFieldException e) { //ignored } } return field; } }