DuplicateKeyException异常处理:java向数据库插入数据异常

向数据库中插入数据异常：

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org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.dao.DuplicateKeyException: 
### Error updating database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '7' for key 'PRIMARY'
### The error may involve cn.itcast.ssm.mapper.ItemsMapper.addItems-Inline
### The error occurred while setting parameters
### SQL: insert into items(id,name,price,pic,createtime,detail)values(?,?,?,?,?,?)
### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '7' for key 'PRIMARY'
; SQL []; Duplicate entry '7' for key 'PRIMARY'; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '7' for key 'PRIMARY'
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:927)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:811)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:796)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

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出现以下异常，com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '7' for key 'PRIMARY'；说明在数据库中这一列，它是关键字！这个关键字数据库中有，所以出现下面异常；就需要把关键字换成数据库表中没有存在的字。