史上最全Java面试题整理（附参考答案）

}
<span class="hljs-keyword">catch (Exception e) {
<span class="hljs-keyword">throw <span class="hljs-keyword">new RuntimeException(e);
}
}

<span class="hljs-comment">/**

• 通过反射给对象的指定字段赋值

• <span class="hljs-doctag">@param target 目标对象

• <span class="hljs-doctag">@param fieldName 字段的名称

• <span class="hljs-doctag">@param value 值
  */
  <span class="hljs-function"><span class="hljs-keyword">public <span class="hljs-keyword">static <span class="hljs-keyword">void <span class="hljs-title">setValue<span class="hljs-params">(Object target,Object value) {
  Class<?> clazz = target.getClass();
  String[] fs = fieldName.split(<span class="hljs-string">".");
  <span class="hljs-keyword">try {
  <span class="hljs-keyword">for(<span class="hljs-keyword">int i = <span class="hljs-number">0; i < fs.length - <span class="hljs-number">1; i++) {
  Field f = clazz.getDeclaredField(fs[i]);
  f.setAccessible(<span class="hljs-keyword">true);
  Object val = f.get(target);
  <span class="hljs-keyword">if(val == <span class="hljs-keyword">null) {
  Constructor<?> c = f.getType().getDeclaredConstructor();
  c.setAccessible(<span class="hljs-keyword">true);
  val = c.newInstance();
  f.set(target,val);
  }
  target = val;
  clazz = target.getClass();
  }

   Field f = clazz.getDeclaredField(fs[fs.length - <span class="hljs-number"&gt;1]);
   f.setAccessible(<span class="hljs-keyword"&gt;true);
   f.set(target,value);

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