将对象里所有的空值属性设置成null

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将一个对象里所有的空值属性设置成null

import class="tags" href="/tags/JAVA.html" title=java>java.lang.reflect.Field;

class="prism language-class="tags" href="/tags/JAVA.html" title=java>java">	class="token comment">/**
	 * 将一个对象里所有的空值属性设置成null
	 * @param o
	 * @return
	 */
	class="token keyword">public Object class="token function">changeToNullclass="token punctuation">(Object oclass="token punctuation">) class="token punctuation">{
		Class class="token class-name">c class="token operator">= oclass="token punctuation">.class="token function">getClassclass="token punctuation">(class="token punctuation">)class="token punctuation">;
		Class class="token class-name">sc class="token operator">= cclass="token punctuation">.class="token function">getSuperclassclass="token punctuation">(class="token punctuation">)class="token punctuation">;
		class="token keyword">if class="token punctuation">(null class="token operator">!= scclass="token punctuation">) class="token punctuation">{
			class="token function">recursionNullclass="token punctuation">(scclass="token punctuation">, oclass="token punctuation">)class="token punctuation">;
		class="token punctuation">}
		class="token keyword">try class="token punctuation">{
			Fieldclass="token punctuation">[class="token punctuation">] fs class="token operator">= cclass="token punctuation">.class="token function">getDeclaredFieldsclass="token punctuation">(class="token punctuation">)class="token punctuation">;
			class="token keyword">for class="token punctuation">(Field f class="token operator">: fsclass="token punctuation">) class="token punctuation">{
				fclass="token punctuation">.class="token function">setAccessibleclass="token punctuation">(class="token boolean">trueclass="token punctuation">)class="token punctuation">;
				String st class="token operator">= fclass="token punctuation">.class="token function">getclass="token punctuation">(oclass="token punctuation">) class="token operator">+ class="token string">""class="token punctuation">;
				String str class="token operator">= stclass="token punctuation">.class="token function">replaceAllclass="token punctuation">(class="token string">" "class="token punctuation">, class="token string">""class="token punctuation">)class="token punctuation">;
				class="token keyword">if class="token punctuation">(strclass="token punctuation">.class="token function">equalsclass="token punctuation">(class="token string">""class="token punctuation">) class="token operator">|| str class="token operator">== null class="token operator">|| strclass="token punctuation">.class="token function">equalsclass="token punctuation">(class="token string">"null"class="token punctuation">)class="token punctuation">) class="token punctuation">{
					fclass="token punctuation">.class="token function">setclass="token punctuation">(oclass="token punctuation">, nullclass="token punctuation">)class="token punctuation">;
				class="token punctuation">}
			class="token punctuation">}
		class="token punctuation">} class="token keyword">catch class="token punctuation">(class="token class-name">SecurityException eclass="token punctuation">) class="token punctuation">{
			eclass="token punctuation">.class="token function">printStackTraceclass="token punctuation">(class="token punctuation">)class="token punctuation">;
		class="token punctuation">} class="token keyword">catch class="token punctuation">(class="token class-name">Exception eclass="token punctuation">) class="token punctuation">{
			eclass="token punctuation">.class="token function">printStackTraceclass="token punctuation">(class="token punctuation">)class="token punctuation">;
		class="token punctuation">}
		class="token keyword">return oclass="token punctuation">;
	class="token punctuation">}
	
	class="token comment">/**
	 * 判断是否有超类，若有则继续将超类的空值置空
	 * @param sc
	 * @param o
	 * @return
	 */
	class="token keyword">public Object class="token function">recursionNullclass="token punctuation">(Class class="token class-name">scclass="token punctuation">,Object oclass="token punctuation">) class="token punctuation">{
		Class class="token class-name">c class="token operator">=scclass="token punctuation">.class="token function">getSuperclassclass="token punctuation">(class="token punctuation">)class="token punctuation">;
		class="token keyword">if class="token punctuation">(null class="token operator">!= cclass="token punctuation">) class="token punctuation">{
			class="token function">recursionNullclass="token punctuation">(cclass="token punctuation">,oclass="token punctuation">)class="token punctuation">;
		class="token punctuation">}
		class="token keyword">try class="token punctuation">{
			Fieldclass="token punctuation">[class="token punctuation">] fs class="token operator">= scclass="token punctuation">.class="token function">getDeclaredFieldsclass="token punctuation">(class="token punctuation">)class="token punctuation">;
			class="token keyword">for class="token punctuation">(Field f class="token operator">: fsclass="token punctuation">) class="token punctuation">{
				fclass="token punctuation">.class="token function">setAccessibleclass="token punctuation">(class="token boolean">trueclass="token punctuation">)class="token punctuation">;
				String st class="token operator">= fclass="token punctuation">.class="token function">getclass="token punctuation">(oclass="token punctuation">) class="token operator">+ class="token string">""class="token punctuation">;
				String str class="token operator">= stclass="token punctuation">.class="token function">replaceAllclass="token punctuation">(class="token string">" "class="token punctuation">, class="token string">""class="token punctuation">)class="token punctuation">;
				class="token keyword">if class="token punctuation">(strclass="token punctuation">.class="token function">equalsclass="token punctuation">(class="token string">""class="token punctuation">) class="token operator">|| str class="token operator">== null class="token operator">|| strclass="token punctuation">.class="token function">equalsclass="token punctuation">(class="token string">"null"class="token punctuation">)class="token punctuation">) class="token punctuation">{
					fclass="token punctuation">.class="token function">setclass="token punctuation">(oclass="token punctuation">, nullclass="token punctuation">)class="token punctuation">;
				class="token punctuation">}
			class="token punctuation">}
		class="token punctuation">} class="token keyword">catch class="token punctuation">(class="token class-name">SecurityException eclass="token punctuation">) class="token punctuation">{
			eclass="token punctuation">.class="token function">printStackTraceclass="token punctuation">(class="token punctuation">)class="token punctuation">;
		class="token punctuation">} class="token keyword">catch class="token punctuation">(class="token class-name">Exception eclass="token punctuation">) class="token punctuation">{
			eclass="token punctuation">.class="token function">printStackTraceclass="token punctuation">(class="token punctuation">)class="token punctuation">;
		class="token punctuation">}
		class="token keyword">return oclass="token punctuation">;
	class="token punctuation">}