如果您能帮助我解决这个问题，我将接受最佳答案并对其余正确答案进行投票。
我已经尝试解决这个问题很长时间了，但我没有运气。
当我点击“添加当前问题”按钮时，出现一个 HTTP 状态 400 的页面，显示“客户端发送的请求在语法上不正确。”
我想做的是将一个值通过jsp中的表单传递给 Controller ， Controller 将处理该值并将其写入CSV文件，并从CSV文件中获取所有数据并将其显示在网页。
我有添加和删除按钮来添加或删除 CSV 文件中的数据。删除功能可以正常使用，但添加功能却不能正常工作。
下面是我的代码:
Controller :
@RequestMapping(value = "/c_Outage", method = RequestMethod.POST)
public String deleteCurrentInputPage(@RequestParam String CurrentDelete_InputPage, @RequestParam(value="DeleteOn", required = false) String DeleteOn, String date, String type, String system, String description, String commit, Locale locale, HttpServletRequest req, Model model) throws Exception{
String currentString = "";
String csvFilename1 = "C:/temp/csv/curdata.csv";
String eachdatarow = "";
int entry = 0;
logger.info("This is commit " + commit, locale);
logger.info("DeleteOn is " + DeleteOn, locale);
logger.info("This is CurrentDelete_InputPage" + CurrentDelete_InputPage, locale);
if (commit == null ){
commit = "";
}
if (DeleteOn == null){
DeleteOn = "";
}
//logger.info("This is CurrentDelete_InputPage" + CurrentDelete_InputPage, locale);
/////////////////////////////// Writing Input Begin ///////////////////////////////////////////////
if(commit.equals("Add Current Issue")){
logger.info("DeleteOn inside if statement is " + DeleteOn, locale);
CSVWriter writer1 = new CSVWriter(new FileWriter(csvFilename1, true));
String [] record1 = {date,type,system,description};
writer1.writeNext(record1);
writer1.close();
} else{}
/////////////////////////////// Writing Input End ///////////////////////////////////////////////
if(DeleteOn.equals("DeleteOn")){
ArrayList<String> INPUTTOCSV = new ArrayList<String>();
CSVReader reader1 = new CSVReader(new FileReader(csvFilename1));
String [] CurnextLineD;
while ((CurnextLineD = reader1.readNext()) != null) {
eachdatarow = CurnextLineD[0] + " " + CurnextLineD[1] + " " + CurnextLineD[2] + " " + CurnextLineD[3] ;
eachdatarow = eachdatarow.replaceAll("\\s+","");
CurrentDelete_InputPage = CurrentDelete_InputPage.replaceAll("\\s+", "");
//logger.info("This is eachdatarow " + eachdatarow, locale);
//logger.info("This is CurrentDelete_InputPage " + CurrentDelete_InputPage, locale);
if(eachdatarow.equals(CurrentDelete_InputPage)){
//logger.info("Success eachdatarow equals CurrentDelete", locale);
continue;
}
INPUTTOCSV.add(CurnextLineD[0]);
INPUTTOCSV.add(CurnextLineD[1]);
INPUTTOCSV.add(CurnextLineD[2]);
INPUTTOCSV.add(CurnextLineD[3]);
entry++;
}
reader1.close();
//logger.info("This is entry " + entry , locale);
//logger.info("This is INPUTTOCSV " + INPUTTOCSV, locale);
int entrytimes4 = entry * 4;
if ( entrytimes4 == 0){
//logger.info("this is entrytimes4 " + entrytimes4, locale);
CSVWriter writer1 = new CSVWriter(new FileWriter(csvFilename1, false));
writer1.writeNext(null);
writer1.close();
}
for(int i = 0; i < entrytimes4; i+=4){
String[] individual = {INPUTTOCSV.get(i), INPUTTOCSV.get(i+1), INPUTTOCSV.get(i+2), INPUTTOCSV.get(i+3)};
//logger.info("This is individual " + individual, locale);
if(i == 0){
CSVWriter writer1 = new CSVWriter(new FileWriter(csvFilename1, false));
writer1.writeNext(individual);
writer1.close();
}
else{
CSVWriter writer1 = new CSVWriter(new FileWriter(csvFilename1, true));
writer1.writeNext(individual);
writer1.close();
}
}
}else{
}
CSVReader reader3 = new CSVReader(new FileReader(csvFilename1));
while ((CurnextLine_InputPage = reader3.readNext()) != null) {
if (CurnextLine_InputPage[0] != null){
currentString += CurnextLine_InputPage[0] + "\t" + CurnextLine_InputPage[1] + "\t" + CurnextLine_InputPage[2] + "\t" + CurnextLine_InputPage[3] + "\t" + "|"; //appending each data each time the while loop loops
}
}
model.addAttribute("currentString", currentString); //This is the long appended string which is to be split in the jsp page by the delimiter '|'
reader3.close();
return "currentO";
}
当前O.jsp:
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<%@ page session="true" %>
<html>
<head>
<title>Home</title>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<!-- Calender Style Sheet Begin -->
<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script src="//code.jquery.com/ui/1.11.2/jquery-ui.js"></script>
<script>
$(function() {
for (i = 0; i < 100000; i++) {
$( "#datepicker"+i ).datepicker({ dateFormat: "mm/dd/yy", firstDay: 1, changeYear: true });
}
});
</script>
</head>
<body>
<%-- <form:form method="post" action="" commandName="currentOutage"> --%>
<form:form method="post" modelAttribute="currentOutage">
<tr><td><h2>Input Current Outage</h2></td><td></td></tr>
<tr><td> </td><td></td></tr>
<tr><td>Date: </td><td><input type="text" name="date" id="datepicker1" style="width: 80px;"></td></tr>
<tr><td>Type: </td><td>
<select name="type">
<option value="">Select...</option>
<option value="Planned">Planned</option>
<option value="Unplanned">Unplanned</option>
<option value="Emergency">Emergency</option>
</select>
</td></tr>
<tr><td>System: </td><td><input type="text" name="system" ></td></tr>
<tr><td>Description: </td><td><input type="text" name="description" style="width: 250px;" ></td></tr>
<p class="submit"><input type="submit" name="commit" value="Add Current Issue"></p>
</form:form>
<h2>Current Outages</h2>
<table>
<h3><td> Date </td> <td> Type </td> <td> System </td> <td> Description </td></h3>
<!-- <tr><td> ${ curdate } </td><td> ${ curtype } </td><td> ${ cursys } </td><td> ${ curdes } </td></tr>-->
<c:set var="currentinput_InputPage" value="${currentString}" />
<c:forEach var="splitcurrentinput_InputPage" items="${fn:split(currentinput_InputPage, '|')}" >
<tr><td><c:out value="${splitcurrentinput_InputPage}" /><tr><td>
<c:if test="${not empty splitcurrentinput_InputPage}">
<form:form method="post" modelAttribute="currentOutageDelete_InputPage" name="form1_InputPage">
<input type="hidden" value="${splitcurrentinput_InputPage}" name="CurrentDelete_InputPage">
<input type="hidden" value="DeleteOn" name = "DeleteOn">
<input type="submit" value="Delete" />
</form:form>
</c:if>
</c:forEach>
</table>
</body>
</html>
CSV 文件的 Maven 依赖项:
<dependency>
<groupId>net.sf.opencsv</groupId>
<artifactId>opencsv</artifactId>
<version>2.3</version>
</dependency>
具体来说，我想要:
String [] record1 = {date,type,system,description};
包含 jsp 中的字段值日期、类型、系统和描述。
最佳答案
要将所有请求参数传递给 Controller 的方法，请使用以下命令:
@RequestParam Map<String,String> params
作为方法参数。然后，在该方法中，您可以使用以下代码简单地获取每个参数(例如):
String onDelete = params.get("OnDelete"); //or any other parameter name as argument
关于java - Spring MVC - 将值从 jsp 传递到 Controller - HTTP 状态 400 - 客户端发送的请求在语法上不正确，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29159059/