spring动态修改bean
@RequestMapping("ok")
public Object test2(){
ApplicationContext applicationContext = SpringContextUtil.getApplicationContext();
String[] beans = applicationContext.getBeanDefinitionNames();
for (String beanName : beans) {
// 拿到bean的Class对象
Class<?> beanType = applicationContext.getType(beanName);
if (beanType == null) {
continue;
}
// 拿到当前bean类型的所有字段
Field[] declaredFields = beanType.getDeclaredFields();
if(!beanName.contains("testService") ){
continue;
}
for (Field field : declaredFields) {
// 从spring容器中拿到这个具体的bean对象
Object bean = applicationContext.getBean(beanName);
// 当前字段设置新的值
try {
setFieldData(field, bean, "ffffff");
System.out.println("finished");
} catch (Exception e) {
e.printStackTrace();
}
}
}
return "ok";
}
private void setFieldData(Field field, Object bean, String data) throws Exception {
// 注意这里要设置权限为true
field.setAccessible(true);
Class<?> type = field.getType();
if (type.equals(String.class)) {
field.set(bean, data);
} else if (type.equals(Integer.class)) {
field.set(bean, Integer.valueOf(data));
} else if (type.equals(Long.class)) {
field.set(bean, Long.valueOf(data));
} else if (type.equals(Double.class)) {
field.set(bean, Double.valueOf(data));
} else if (type.equals(Short.class)) {
field.set(bean, Short.valueOf(data));
} else if (type.equals(Byte.class)) {
field.set(bean, Byte.valueOf(data));
} else if (type.equals(Boolean.class)) {
field.set(bean, Boolean.valueOf(data));
} else if (type.equals(Date.class)) {
field.set(bean, new Date(Long.valueOf(data)));
}
}
参考
