# 关于formXcontent如何使用的问题

**URL:** <https://discuss.elastic.co/t/formxcontent/211409>\
**Category:** Elasticsearch\
**Created:** [December 11, 2019, 5:05am UTC](https://discuss.elastic.co/t/formxcontent/211409 "2019-12-11T05:05:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![401825317](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/401825317/32/20099_2.png) [@401825317](https://discuss.elastic.co/u/401825317)\
**Post date:** [December 11, 2019, 5:05am UTC](https://discuss.elastic.co/t/formxcontent/211409/1 "2019-12-11T05:05:29Z")

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我遇到一个问题，我希望把一个基础的bool查询分别赋值给多个对象使用，现在不知道怎么实现深拷贝，因为boolquery没有实现序列化，所以想到了转成json，然后再转成一个新的boolquery对象，遇到了现在这个问题，这是我的实现：[https://elasticsearch.cn/uploads/questions/20191211/ebea6831c99e34c907a697dc2304c59f.png](https://elasticsearch.cn/uploads/questions/20191211/ebea6831c99e34c907a697dc2304c59f.png)  
堆栈信息如下:

java.lang.NullPointerException  
at org.elasticsearch.index.query.BoolQueryBuilder.fromXContent(BoolQueryBuilder.java:298)  
at com.motoband.mannger.SearchManager.searchNews(SearchManager.java:1013)  
at com.motoband.servlet.SearchNewsServlet.doPost(SearchNewsServlet.java:41)  
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)  
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)  
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)  
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)  
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)  
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)  
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)  
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)  
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)  
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)  
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)  
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)  
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)  
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)  
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)  
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)  
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)  
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806)  
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)  
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)  
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)  
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)  
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)  
at java.lang.Thread.run(Thread.java:745)

@polyfractal

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [January 8, 2020, 5:05am UTC](https://discuss.elastic.co/t/formxcontent/211409/2 "2020-01-08T05:05:30Z")

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