我有一个使用 Thymeleaf 的 Spring Boot 1.3.0 应用。我在页面上有一个表单,允许用户上传文件。我想添加一些复选框也返回我的控制器。
我还没有找到一个很好的例子,如何以这种方式做复选框。我想我必须在我的模型中定义一个列表,让Thymeleaf显示所有复选框,但我无法使其工作。
这是我的控制器:
@Controller
public class CustomerDataController {
private static final String SEARCH_TYPES = "searchTypes";
@RequestMapping(value = "/upload", method = RequestMethod.GET)
public String displayUpload(Model model) {
initModel( model );
return "upload";
}
private void initModel(Model model) {
model.addAttribute( UPLOAD, null );
// the values to display as check box title & values
model.addAttribute(SEARCH_TYPES, Arrays.asList("Search A", "Search B"));
// list to store what the user checks on the UI
model.addAttribute("searchValue", new ArrayList<>());
model.addAttribute( customerResults );
}
@Transactional
@RequestMapping(value = "/userFile", method = RequestMethod.POST)
public String handleFileUpload(@RequestParam("myFile") MultipartFile file, Model model, Authentication authentication) {
// looking to get searchValue list, but not sure this is right
}
}
这里是我的html的重要部分:
<form onsubmit="return validate(this)" action="userFile"
th:action="@{/userFile}" method="post" enctype="multipart/form-data">
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>
<ul>
<li th:each="search : ${searchTypes}">
<input type="checkbox" th:field="*{searchValue}" th:value="${search}"/>
<label th:text="#{${search}}"></label>
</li>
</ul>
<p><input type="file" name="myFile" id="myFile"/></p>
<p><input type="submit" class="btn btn-success" value="Submit Customer Data"/></p>
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>
</form>
复选框列表构建正确,但当我选择其中任何一个时,我的控制器模型中都没有显示任何值。
有人可以指出我正确的方向,将选定的复选框列表返回给我的控制器吗?
答案 0 :(得分:5)
我修复了你的代码。
<强>控制器强>
我使用initValues()
方法用值填充model
。
我还在@RequestParam List<String> searchValues
方法中添加了handleFileUpload()
参数。
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import java.util.Arrays;
import java.util.List;
@Controller
public class CustomerDataController {
private static final String SEARCH_TYPES = "searchTypes";
@ModelAttribute
public void initValues(Model model) {
model.addAttribute(SEARCH_TYPES, Arrays.asList("Search A", "Search B"));
}
@RequestMapping(value = "/upload", method = RequestMethod.GET)
public String displayUpload() {
return "upload";
}
@RequestMapping(value = "/userFile", method = RequestMethod.POST)
public String handleFileUpload(@RequestParam("myFile") MultipartFile file,
@RequestParam List<String> searchValues) {
// here you can use searchValues and file
return "result";
}
}
<强> upload.html 强>
我将<label th:text="#{${search}}"></label>
修改为<label th:text="${search}"></label>
。
我还修复了<form>
和<input type="checkbox">
代码。
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org"
lang="en"
xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8"/>
<title>Upload</title>
</head>
<body>
<form th:action="@{/userFile}" method="post" enctype="multipart/form-data">
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>
<ul>
<li th:each="search : ${searchTypes}">
<input type="checkbox" name="searchValues" th:value="${search}"/>
<label th:text="${search}"></label>
</li>
</ul>
<p><input type="file" name="myFile" id="myFile"/></p>
<p><input type="submit" class="btn btn-success" value="Submit Customer Data"/></p>
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>
</form>
</body>
</html>