{"timestamp":"2020-03-30 18:48:22","status":500,"error":"Internal Server Error","exception":"org.springframework.jdbc.BadSqlGrammarException","message":"\n### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-8,8' at line 6\n### The error may exist in class path resource [mybatis/mapper/ArticelMapper.xml]\n### The error may involve defaultParameterMap\n### The error occurred while setting parameters\n### SQL: select a.id,a.title,a.keyword,a.content,a.text,a.category_id,a.author,a.create_time,u.nickname as author_name from article a left join user u on u.username = a.author WHERE category_id like concat(?,'%') order by create_time desc limit ?,?\n### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-8,8' at line 6\n; bad SQL grammar []; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-8,8' at line 6","path":"/index.html"}