当前使用版本(必填,否则不予处理)

java 1.8.0_211 mybatis-plus 3.3.1

该问题是如何引起的？(确定最新版也有问题再提!!!)

打包libs,resource分离

重现步骤(如果有就写完整)

报错信息

nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression 'ew.sqlSegment != null and ew.sqlSegment != '' and ew.nonEmptyOfWhere'. Cause: org.apache.ibatis.ognl.OgnlException: sqlSegment [com.baomidou.mybatisplus.core.exceptions.MybatisPlusException: This is impossible to happen] org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression 'ew.sqlSegment != null and ew.sqlSegment != '' and ew.nonEmptyOfWhere'. Cause: org.apache.ibatis.ognl.OgnlException: sqlSegment [com.baomidou.mybatisplus.core.exceptions.MybatisPlusException: This is impossible to happen] at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:92) at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:440) at com.sun.proxy.$Proxy109.selectList(Unknown Source) at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:223) at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.executeForMany(MybatisMapperMethod.java:177) at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:78) at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:96) at com.sun.proxy.$Proxy127.selectList(Unknown Source) at com.baomidou.mybatisplus.extension.service.IService.list(IService.java:275) at com.baomidou.mybatisplus.extension.service.IService$$FastClassBySpringCGLIB$$f8525d18.invoke() at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:685)

Comment From: dushitaoyuan

出现问题的代码, 在 SerializedLambda.resolve public static SerializedLambda resolve(SFunction<?, ?> lambda) { if (!lambda.getClass().isSynthetic()) { throw ExceptionUtils.mpe("该方法仅能传入 lambda 表达式产生的合成类"); } try (ObjectInputStream objIn = new ObjectInputStream(new ByteArrayInputStream(SerializationUtils.serialize(lambda))) { @Override protected Class<?> resolveClass(ObjectStreamClass objectStreamClass) throws IOException, ClassNotFoundException { Class<?> clazz = super.resolveClass(objectStreamClass); return clazz == java.lang.invoke.SerializedLambda.class ? SerializedLambda.class : clazz; } }) { return (SerializedLambda) objIn.readObject(); } catch (ClassNotFoundException | IOException e) { throw ExceptionUtils.mpe("This is impossible to happen", e); }

出现在解析lamda列上, Class<?> clazz = super.resolveClass(objectStreamClass),

这一行,最新版 3.4.1 bug已修复,修复代码如下:

otected Class<?> resolveClass(ObjectStreamClass objectStreamClass) throws IOException, ClassNotFoundException { Class<?> clazz; try { clazz = ClassUtils.toClassConfident(objectStreamClass.getName()); } catch (Exception ex) { clazz = super.resolveClass(objectStreamClass); }

// ClassUtils.toClassConfident(objectStreamClass.getName()); 方法实现 public static Class<?> toClassConfident(String name) { try { return Class.forName(name, false, getDefaultClassLoader()); } catch (ClassNotFoundException e) { try { return Class.forName(name); } catch (ClassNotFoundException ex) { throw ExceptionUtils.mpe("找不到指定的class！请仅在明确确定会有 class 的时候，调用该方法", e); } } } public static ClassLoader getDefaultClassLoader() { ClassLoader cl = null; try { cl = Thread.currentThread().getContextClassLoader(); } catch (Throwable ex) { // Cannot access thread context ClassLoader - falling back... } if (cl == null) { // No thread context class loader -> use class loader of this class. cl = ClassUtils.class.getClassLoader(); if (cl == null) { // getClassLoader() returning null indicates the bootstrap ClassLoader try { cl = ClassLoader.getSystemClassLoader(); } catch (Throwable ex) { // Cannot access system ClassLoader - oh well, maybe the caller can live with null... } } } return cl; }