java.sql.SQLException: Unknown column '自由论' in 'field list' Query: update t_book set name = 自由论

java.sql.SQLException: Unknown column '自由论' in 'field list' Query: update t_book set name = 自由论 , author ='123' ,price =12.0 , sales =1 ,stock =1 , img_path ='123' where id = 34 Parameters: []
at org.apache.commons.dbutils.QueryRunner.rethrow(QueryRunner.java:542)
at org.apache.commons.dbutils.QueryRunner.update(QueryRunner.java:599)
at dao.Impl.BaseDao.update(BaseDao.java:22)
at dao.Impl.BookDaoImpl.updateBook(BookDaoImpl.java:46)
at test.BookDaoTest.updateBook(BookDaoTest.java:27)
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$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)

 

原因分析：
通过检查数据库中的字段名、实体类中的字段名、字符编码、数据库字段前后的空格，发现都没有问题，突然间想到我这里sql语句中涉及到字段赋值操作，才发现根本原因是sql语句中的单引号和双引号错误，可以看到程序中sql语句中为字段修改的值是直接通过“+”进行连接的，这样是错误的，因为这里三个字段的值需要作为字符串传入，所以需要在双引号外加上英文状态下的单引号。

解决方案：

修改sql：

 

 

 

原文链接：https://blog.csdn.net/qq_36105011/article/details/121394163