Java 在mysql表中保存html表的数据
在我的系统中，用户将看到一个基本的时间表视图，他可以通过在每个列表中使用下拉菜单添加主题。我需要将时间表中的所有主题存储在sql表中。当用户使用下拉菜单选择主题时，应创建一个包含开始、结束时间、日期和主题代码的新sql行。是否有人可以提供帮助 添加时间表视图Java 在mysql表中保存html表的数据,java,mysql,hibernate,spring-boot,Java,Mysql,Hibernate,Spring Boot,在我的系统中，用户将看到一个基本的时间表视图，他可以通过在每个列表中使用下拉菜单添加主题。我需要将时间表中的所有主题存储在sql表中。当用户使用下拉菜单选择主题时，应创建一个包含开始、结束时间、日期和主题代码的新sql行。是否有人可以提供帮助 添加时间表视图 <!DOCTYPE html> <html xmlns:th="https://www.thymeleaf.org"> <head> <link rel="stylesheet" type=
<!DOCTYPE html>
<html xmlns:th="https://www.thymeleaf.org">
<head>
<link rel="stylesheet" type="text/css" href="static/css/timeTableMapping.css" th:href="@{/css/timeTableMapping.css}">
<meta charset="UTF-8">
<title>Time Table</title>
</head>
<body>
</form>
<div class="container2">
<form action="#" th:action="@{/timeTableMapping/save}" th:object="${timeTableMapping}" method="post">
<table border="0" cell[adding="10">
<tr>
<td><h1>Time Table:</h1></td>
<td>
<select th:field="*{time_table_code}">
<option value="">Choose..</option>
<option th:each="timeTable: ${timeTables}" th:value="${timeTable.name}" th:text="${timeTable.name}"/>
</select>
</td>
</tr>
</table>
<table border="1" >
<thead>
<tr>
</tr>
<br>
<th></th>
<th:block th:each="day : ${days}">
<th th:text="${day.name}"></th>
</th:block>
</thead>
<tbody>
<th:block th:each="time : ${times}">
<tr>
<th th:text="${ time.start }+':00 - ' + ${ time.end }+':00'"></th>
<th:block th:each="day : ${days}">
<td>
<select th:field="*{subject_code}">
<option value=""></option>
<option th:each="subject: ${subjects}" th:value="${subject.subject_code}" th:text="${subject.name}"/>
</select>
</td>
</th:block>
</tr>
</th:block>
<tr>
<td colspan="2">
<button type="submit">Save</button>
</td>
</tr>
</tbody>
</table>
</form>
</div>
</body>
</html>
因此，请检查列subject_code中的最大长度，然后检查输入的长度。当我只选择了一个主题时，这应该会让你清楚地知道哪里出了问题——它工作正常。但是，当我选择多个1时，它会显示以下错误消息Data truncation:数据对于“subject_code”列来说太长-您尝试插入的数据比字段能够存储的数据长。检查DBi中的定义，我需要为我选择的所有主题添加uniquesql记录。（例如：如果10个时隙和5天，则为50条记录）。但问题是，当我尝试此操作时，所有记录都添加到同一行。这是我尝试此操作时生成的sql语句，在我选择“提交”按钮时生成一次，但我希望每次选择主题时生成此语句[插入timetablemappings（日期、结束、开始、主题代码、时间表代码、id）值（？，，，，，，，）]；
@Controller
public class TimeTableMappingController {
@Autowired
private TimeTableMappingDAO timeTableMappingDAO;
@Autowired
private TimeTableDAO timeTableDAO;
@Autowired
private SubjectDAO subjectDAO;
@Autowired
private StudentGroupDAO studentGroupDAO;
@Autowired
private DayDAO dayDAO;
@Autowired
private TimeDAO timeDAO;
@RequestMapping("/timeTableMapping")
public String viewHomePage(Model model){
List<TimeTableMapping> timeTableMappingDetails= timeTableMappingDAO.findAll();
model.addAttribute("timeTableMappingDetails",timeTableMappingDetails);
return "timeTableMapping";
}
@RequestMapping("/timeTableMapping/new")
public String addTimeTableMapping(Model model){
TimeTableMapping timeTableMapping =new TimeTableMapping();
model.addAttribute("timeTableMapping",timeTableMapping);
List<TimeTable> timeTableDetail = timeTableDAO.findAll();
model.addAttribute("timeTables", timeTableDetail);
List<Subject> subjectDetail = subjectDAO.findAll();
model.addAttribute("subjects", subjectDetail);
List<Day> dayDetails = dayDAO.findAll();
model.addAttribute("days",dayDetails);
List<Time> timeDetails = timeDAO.findAll();
model.addAttribute("times",timeDetails);
return "addTimeTableMapping";
}
@RequestMapping(value="/timeTableMapping/save",method= RequestMethod.POST)
public String saveTimeTable(@ModelAttribute("timeTableMapping") TimeTableMapping timeTableMapping){
timeTableMappingDAO.save(timeTableMapping);
return "redirect:/timeTableMapping";
}
@RequestMapping(value="/timeTableMapping/saveAll",method= RequestMethod.POST)
public String saveAll(@ModelAttribute("timeTable") TimeTable timeTable){
timeTableDAO.saveAll(timeTable);
return "redirect:/timeTable";
}
@RequestMapping("/timeTableMapping/edit/{id}")
public ModelAndView updateTimeTable(@PathVariable(name="id")Long id){
ModelAndView mav=new ModelAndView(("updateTimeTable"));
TimeTable timeTable = timeTableDAO.findById(id);
mav.addObject("timeTable",timeTable);
List<Subject> subjectDetails = subjectDAO.findAll();
mav.addObject("subjects", subjectDetails);
List<StudentGroup> studentGroupDetails = studentGroupDAO.findAll();
mav.addObject("studentGroups",studentGroupDetails);
List<Day> dayDetails = dayDAO.findAll();
mav.addObject("days",dayDetails);
List<Time> timeDetails = timeDAO.findAll();
mav.addObject("times",timeDetails);
return mav;
}
@RequestMapping("/timeTableMapping/delete/{id}")
public String deleteProduct(@PathVariable(name="id") Long id){
timeTableDAO.delete(id);
return "redirect:/timeTable";
}
}
There was an unexpected error (type=Internal Server Error, status=500).
could not execute batch; SQL [insert into timetablemappings (day, end, start, subject_code, time_table_code, id) values (?, ?, ?, ?, ?, ?)]; nested exception is org.hibernate.exception.DataException: could not execute batch
org.springframework.dao.DataIntegrityViolationException: could not execute batch; SQL [insert into timetablemappings (day, end, start, subject_code, time_table_code, id) values (?, ?, ?, ?, ?, ?)]; nested exception is org.hibernate.exception.DataException: could not execute batch
Caused by: com.mysql.cj.jdbc.exceptions.MysqlDataTruncation: Data truncation: Data too long for column 'subject_code' at row 1