mybatis-plus报错：io.grpc.StatusRuntimeException: INTERNAL: nested exception is org.apache.ibatis.build

io.grpc.StatusRuntimeException: INTERNAL: nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression ''. Cause: org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression:  [org.apache.ibatis.ognl.ParseException: Encountered "<EOF>" at line 1, column 0.
Was expecting one of:
    ":" ...
    "not" ...
    "+" ...
    "-" ...
    "~" ...
    "!" ...
    "(" ...
    "true" ...
    "false" ...
    "null" ...
    "#this" ...
    "#root" ...
    "#" ...
    "[" ...
    "{" ...
    "@" ...
    "new" ...
    <IDENT> ...
    <DYNAMIC_SUBSCRIPT> ...
    "\'" ...
    "`" ...
    "\"" ...
    <INT_LITERAL> ...
    <FLT_LITERAL> ...
    ]
	at io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:244)
	at io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:225)
	at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:142)```

错误原因：

写crud的时候获得了上面的报错，原来是自己在mapper.xml写sql的时候，标签里面的语法写错了，比如我是写错了if标签：xxx，test里面的条件忘了写；也有时写成 xxx,if标签里面不能用&&,应该用and，像这样：xxx。总之，出现上面的错，检查一下if、foreach标签里面语法有没有错误。