FAQ（55）：java.sql.SQLException: You have an error in your SQL syntax; check the manual that correspon

springmvc + spring ：

看Log：

java.sql.SQLException: 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 '' at line 1
  com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2926)
  com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1571)
  com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1666)
  com.mysql.jdbc.Connection.execSQL(Connection.java:2972)
  com.mysql.jdbc.Connection.execSQL(Connection.java:2902)
  com.mysql.jdbc.Statement.executeQuery(Statement.java:822)
  com.User.Dao.UserDaoImpl.getUserList(UserDaoImpl.java:91)
  com.User.Service.UserServiceImpl.getUserList(UserServiceImpl.java:24)
  com.User.Controller.UserController.getUserList(UserController.java:113)
  sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
  sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  java.lang.reflect.Method.invoke(Unknown Source)
  org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
  org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
  org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
  org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
  org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
  org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
  org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
  org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
  org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
  org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
  javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
  org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
  javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
  org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
  org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
  org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

解决：sql的一处语法出错，因为使用了jdbc，所以稍显繁琐，错在LIKE CONCAT('%','xxx','%')没写正确。

原：

sql = "select u.userCode,u.userName,u.gender,u.birthday,u.phone,r.roleName "
        + " from smbms_user u,smbms_role r"
        + " where u.userName  like CONCAT('%',#{"+queryUserName+"},'%')" 
            + " and u.userRole="+_queryUserRole
            + " and u.userRole=r.id;";

改：

sql = "select u.userCode,u.userName,u.gender,u.birthday,u.phone,r.roleName "
        + " from smbms_user u,smbms_role r"
        + " where u.userName  like CONCAT('%','"+queryUserName+"','%')" 
            + " and u.userRole="+_queryUserRole
            + " and u.userRole=r.id;";