BindingException： Parameter 'XXX' not found. Available parameters are [collection, list]_iphone

应业务需求，需要使用到MQ进行数据上传和下发。传递格式为JSON,服务那边下发JSON数组，接收端将JSON数组转换成List集合，调用Mybatis-plus批量添加saveBatch()。提示字段未找到...

org.apache.ibatis.exceptions.PersistenceException: 
### Error updating database.  Cause: org.apache.ibatis.binding.BindingException: Parameter '字段' not found. Available parameters are [collection, list]
### The error may exist in com/vinsuan/parking/client/dao/mapper/ParkingLongrentInfoTimeMapper.java (best guess)
### The error may involve com.vinsuan.parking.client.dao.mapper.ParkingLongrentInfoTimeMapper.insert
### The error occurred while executing an update
### Cause: org.apache.ibatis.binding.BindingException: Parameter '字段' not found. Available parameters are [collection, list]
	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:200)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:185)
	at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl.saveBatch(ServiceImpl.java:122)
	at com.baomidou.mybatisplus.extension.service.IService.saveBatch(IService.java:58)
	at com.baomidou.mybatisplus.extension.service.IService$$FastClassBySpringCGLIB$$f8525d18.invoke(<generated>)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
	at com.vinsuan.parking.client.service.impl.ParkingLongrentInfoTimeServiceImpl$$EnhancerBySpringCGLIB$$f890ae1b.saveBatch(<generated>)
	at com.vinsuan.parking.client.datahandler.mqtt.MqttHandler.handlerDataToMethod(MqttHandler.java:259)
	at com.vinsuan.parking.client.datahandler.mqtt.MqttHandler.handlerData(MqttHandler.java:239)
	at com.vinsuan.parking.client.datahandler.mqtt.MqttHandler.messageArrived(MqttHandler.java:84)
	at org.eclipse.paho.client.mqttv3.internal.CommsCallback.deliverMessage(CommsCallback.java:499)
	at org.eclipse.paho.client.mqttv3.internal.CommsCallback.handleMessage(CommsCallback.java:402)
	at org.eclipse.paho.client.mqttv3.internal.CommsCallback.run(CommsCallback.java:206)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
	at java.util.concurrent.FutureTask.run(FutureTask.java)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.ibatis.binding.BindingException: Parameter '字段' not found. Available parameters are [collection, list]
	at org.apache.ibatis.session.defaults.DefaultSqlSession$StrictMap.get(DefaultSqlSession.java:343)
	at org.apache.ibatis.scripting.xmltags.DynamicContext$ContextAccessor.getProperty(DynamicContext.java:113)
	at org.apache.ibatis.ognl.OgnlRuntime.getProperty(OgnlRuntime.java:2719)
	at org.apache.ibatis.ognl.ASTProperty.getValueBody(ASTProperty.java:114)
	at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
	at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:258)
	at org.apache.ibatis.ognl.ASTNotEq.getValueBody(ASTNotEq.java:50)
	at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
	at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:258)
	at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:493)
	at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:457)
	at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:46)
	at org.apache.ibatis.scripting.xmltags.ExpressionEvaluator.evaluateBoolean(ExpressionEvaluator.java:32)
	at org.apache.ibatis.scripting.xmltags.IfSqlNode.apply(IfSqlNode.java:34)
	at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:33)
	at org.apache.ibatis.scripting.xmltags.TrimSqlNode.apply(TrimSqlNode.java:55)
	at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:33)
	at org.apache.ibatis.scripting.xmltags.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:41)
	at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:293)
	at org.apache.ibatis.executor.statement.BaseStatementHandler.<init>(BaseStatementHandler.java:64)
	at org.apache.ibatis.executor.statement.PreparedStatementHandler.<init>(PreparedStatementHandler.java:41)
	at org.apache.ibatis.executor.statement.RoutingStatementHandler.<init>(RoutingStatementHandler.java:46)
	at org.apache.ibatis.session.Configuration.newStatementHandler(Configuration.java:563)
	at org.apache.ibatis.executor.BatchExecutor.doUpdate(BatchExecutor.java:57)
	at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)
	at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:198)

原因：使用hutool工具类将JSON数组转换成List集合,发现有两层集合。

<!-- hutool 版本：4.5.0 -->
    <dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-all</artifactId>
        <version>4.5.0</version>
    </dependency>

/**
     * 测试 JSON数组转换成List集合
     * @param args
     */
    public static void main(String[] args) {
        String data = "[{\"id\":1,\"username\":\"username\",\"password\":\"password\"},{\"id\":2,\"username\":\"username2\"}]";
        List<Object> list = JSONUtil.toList(JSONUtil.parseArray(data), Object.class);
        System.out.println(list);
    }
    -------------控制台打印-------------
    [[{"password":"password","id":1,"username":"username"}, {"id":2,"username":"username2"}]]