这是我第一次想要在 CSDN 社区发表博客，原因呢是因为我也用了 CSDN 两年了，非常感谢它帮助我解决了很多问题，但是呢，每个人和每个人的问题都会有一些出入，所以呢，我想把我遇到的问题并且得以解决的分享给大家！
问题
我是在听了老师讲的 MyBatis 后想要使用动态 SQL 语句执行插入操作，但是我自认为没有问题的 sql 语句却出现了一个非常呆呆的错误，就是我的下面这条语句的最后一个 test="userRole != null and userRole ! = ''" 中的感叹号写成了中文的，这个困扰了我好久都没有找出来，后来经过一点点调试发现的。
<update id="modify" parameterType="User">
update smbms_user
<trim prefix="set" suffixOverrides=",">
<if test="userCode != null and userCode != ''">
userCode = #{userCode},
</if>
<if test="userName != null and userName != ''">
userName = #{userName},
</if>
<if test="userPassword != null and userPassword != ''">
userPassword = #{userPassword},
</if>
<if test="gender != null and gender != ''">
gender = #{gender},
</if>
<if test="birthday != null and birthday != ''">
birthday = #{birthday},
</if>
<if test="phone != null and phone != ''">
phone = #{phone},
</if>
<if test="address != null and address != ''">
address = #{address},
</if>
<if test="userRole != null and userRole ! = ''">
userRole = #{userRole},
</if>
</trim>
where id=#{id}
</update>解决办法
只需要将test="userRole != null and userRole ! = ''" 中的感叹号改成英文的即可。
下面看一下我的错误提示吧
org.apache.ibatis.exceptions.PersistenceException:
### Error updating database. Cause: org.apache.ibatis.builder.BuilderException: Error evaluating expression 'userRole != null and userRole ! = '''. Cause: org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression: userRole != null and userRole ! = '' [org.apache.ibatis.ognl.ParseException: Encountered " "!" "! "" at line 1, column 31.
Was expecting one of:
<EOF>
"," ...
"=" ...
"?" ...
"||" ...
"or" ...
"&&" ...
"and" ...
"|" ...
"bor" ...
"^" ...
"xor" ...
"&" ...
"band" ...
"==" ...
"eq" ...
"!=" ...
"neq" ...
"<" ...
"lt" ...
">" ...
"gt" ...
"<=" ...
"lte" ...
">=" ...
"gte" ...
"in" ...
"not" ...
"<<" ...
"shl" ...
">>" ...
"shr" ...
">>>" ...
"ushr" ...
"+" ...
"-" ...
"*" ...
"/" ...
"%" ...
"instanceof" ...
"." ...
"(" ...
"[" ...
<DYNAMIC_SUBSCRIPT> ...
"(" ...
]
### The error may exist in mapper/UserMapper.xml
### The error may involve com.smbms.mapper.UserMapper.modify
### The error occurred while executing an update
### Cause: org.apache.ibatis.builder.BuilderException: Error evaluating expression 'userRole != null and userRole ! = '''. Cause: org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression: userRole != null and userRole ! = '' [org.apache.ibatis.ognl.ParseException: Encountered " "!" "! "" at line 1, column 31.
Was expecting one of:
<EOF>
"," ...
"=" ...
"?" ...
"||" ...
"or" ...
"&&" ...
"and" ...
"|" ...
"bor" ...
"^" ...
"xor" ...
"&" ...
"band" ...
"==" ...
"eq" ...
"!=" ...
"neq" ...
"<" ...
"lt" ...
">" ...
"gt" ...
"<=" ...
"lte" ...
">=" ...
"gte" ...
"in" ...
"not" ...
"<<" ...
"shl" ...
">>" ...
"shr" ...
">>>" ...
"ushr" ...
"+" ...
"-" ...
"*" ...
"/" ...
"%" ...
"instanceof" ...
"." ...
"(" ...
"[" ...
<DYNAMIC_SUBSCRIPT> ...
"(" ...
]
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:196)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:67)
at org.apache.ibatis.binding.MapperProxy$PlainMethodInvoker.invoke(MapperProxy.java:145)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:86)
at com.sun.proxy.$Proxy6.modify(Unknown Source)
at TestUser.TestQuery(TestUser.java:70)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38)
at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)
Caused by: org.apache.ibatis.builder.BuilderException: Error evaluating expression 'userRole != null and userRole ! = '''. Cause: org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression: userRole != null and userRole ! = '' [org.apache.ibatis.ognl.ParseException: Encountered " "!" "! "" at line 1, column 31.
Was expecting one of:
<EOF>
"," ...
"=" ...
"?" ...
"||" ...
"or" ...
"&&" ...
"and" ...
"|" ...
"bor" ...
"^" ...
"xor" ...
"&" ...
"band" ...
"==" ...
"eq" ...
"!=" ...
"neq" ...
"<" ...
"lt" ...
">" ...
"gt" ...
"<=" ...
"lte" ...
">=" ...
"gte" ...
"in" ...
"not" ...
"<<" ...
"shl" ...
">>" ...
"shr" ...
">>>" ...
"ushr" ...
"+" ...
"-" ...
"*" ...
"/" ...
"%" ...
"instanceof" ...
"." ...
"(" ...
"[" ...
<DYNAMIC_SUBSCRIPT> ...
"(" ...
]
at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:48)
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.lambda$apply$0(MixedSqlNode.java:32)
at java.util.ArrayList.forEach(ArrayList.java:1257)
at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:32)
at org.apache.ibatis.scripting.xmltags.TrimSqlNode.apply(TrimSqlNode.java:55)
at org.apache.ibatis.scripting.xmltags.MixedSqlNode.lambda$apply$0(MixedSqlNode.java:32)
at java.util.ArrayList.forEach(ArrayList.java:1257)
at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:32)
at org.apache.ibatis.scripting.xmltags.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:39)
at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:305)
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:681)
at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:48)
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:194)
... 29 more
Caused by: org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression: userRole != null and userRole ! = '' [org.apache.ibatis.ognl.ParseException: Encountered " "!" "! "" at line 1, column 31.
Was expecting one of:
<EOF>
"," ...
"=" ...
"?" ...
"||" ...
"or" ...
"&&" ...
"and" ...
"|" ...
"bor" ...
"^" ...
"xor" ...
"&" ...
"band" ...
"==" ...
"eq" ...
"!=" ...
"neq" ...
"<" ...
"lt" ...
">" ...
"gt" ...
"<=" ...
"lte" ...
">=" ...
"gte" ...
"in" ...
"not" ...
"<<" ...
"shl" ...
">>" ...
"shr" ...
">>>" ...
"ushr" ...
"+" ...
"-" ...
"*" ...
"/" ...
"%" ...
"instanceof" ...
"." ...
"(" ...
"[" ...
<DYNAMIC_SUBSCRIPT> ...
"(" ...
]
at org.apache.ibatis.ognl.Ognl.parseExpression(Ognl.java:181)
at org.apache.ibatis.scripting.xmltags.OgnlCache.parseExpression(OgnlCache.java:55)
at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:46)
... 48 more
Caused by: org.apache.ibatis.ognl.ParseException: Encountered " "!" "! "" at line 1, column 31.
Was expecting one of:
<EOF>
"," ...
"=" ...
"?" ...
"||" ...
"or" ...
"&&" ...
"and" ...
"|" ...
"bor" ...
"^" ...
"xor" ...
"&" ...
"band" ...
"==" ...
"eq" ...
"!=" ...
"neq" ...
"<" ...
"lt" ...
">" ...
"gt" ...
"<=" ...
"lte" ...
">=" ...
"gte" ...
"in" ...
"not" ...
"<<" ...
"shl" ...
">>" ...
"shr" ...
">>>" ...
"ushr" ...
"+" ...
"-" ...
"*" ...
"/" ...
"%" ...
"instanceof" ...
"." ...
"(" ...
"[" ...
<DYNAMIC_SUBSCRIPT> ...
"(" ...
at org.apache.ibatis.ognl.OgnlParser.generateParseException(OgnlParser.java:3232)
at org.apache.ibatis.ognl.OgnlParser.jj_consume_token(OgnlParser.java:3098)
at org.apache.ibatis.ognl.OgnlParser.topLevelExpression(OgnlParser.java:19)
at org.apache.ibatis.ognl.Ognl.parseExpression(Ognl.java:179)
... 50 more