如何从URL获取querystring传递的值到spring控制器中？
[英]How to get querystring passed value from the url into spring controller?
问题描述
I want to get the querystrting passing value from the given url , like: http://localhost:8080/app?contentid=10 I want to get the value of contentid is: 10 from the above url in my spring controller, how can I get this ? 
我想从给定的url获取querystrting传递的值，例如： http://localhost:8080/app?contentid=10我想获得contentid is: 10从我的spring控制器中的上述url获得contentid is: 10我明白了吗？
Please note that if I pass any value there(like 10, 50,100, 200, ...etc - it can be any number), so whatever I am passing to contentid , that value should get into my controller. 请注意，如果我在那里传递任何值（例如10、50、100、200，...等-可以是任何数字），那么无论我传递给contentid哪个值，该值都应进入我的控制器。 I want to get this contentid value from that url only, not from my html page or I don't want to pass from my html page. 我只想从该url获取此contentid值，而不是从我的html页面获取，或者我不想从我的html页面传递。 Currently I am getting null from the below code in controller, I am not getting the passing value(like 10 from the url ). 目前，我从控制器中的以下代码获取null ，没有获取传递的值（如url 10）。 How can I achieve this ? 我该如何实现？ Thanks in advance for your help ! 在此先感谢您的帮助 ！
app.html: app.html：
<form action="#" th:action="@{/app}" th:object="${TestData}" method="post">
<div class="form-group">
<label for="firstname">First Name: </label> <input type="text"
class="form-control" id="firstname" name="firstname" ></textarea>
</div>
<div class="form-group">
<label for="secondname">Second Name:</label> <input type="text"
class="form-control" id="secondname" name="secondname" />
</div>
<button type="submit" value="Submit">Submit</button>
</form>
TestData.java: TestData.java：
public class TestData implements Serializable{
private String firstname;
private String secondname;
private int contentid;
//setters and getters
public TestData() {}
public TestData(String firstname, String secondname, int contentid, ){
this.firstname = firstname;
this.secondname = secondname;
this.contentid = contentid;
}
@Override
public String toString() {
return String.format(
"TestData[firstname=%s, secondname=%s, contentid=%d]",
firstname, secondname, contentid);
}
}
Controller: 控制器：
public class TestDataController {
@Autowired
TestService testDataService;
@RequestMapping(value="/app", method=RequestMethod.POST)
public String testDataSubmit(@RequestParam(required=false) Integer contentid, @ModelAttribute TestData testData, Model model, HttpServletRequest request) {
String id = request.getQueryString();
System.out.println("My Id: "+id);//null
System.out.println("URL Parameter: "+testData.getContentid());//0
System.out.println("URL Parameter passed objectid: "+contentid); //null
testDataService.saveTestDataDetails(testData);
return "app";
}
}
Service: 服务：
@Service
public class TestService {
@PersistenceContext
private EntityManager entityManager;
public void saveTestDataDetails(TestData testData) {
StoredProcedureQuery sp = entityManager.createStoredProcedureQuery("APP.TESTDATA");
sp.registerStoredProcedureParameter("firstname", String.class, ParameterMode.IN);
sp.registerStoredProcedureParameter("secondname", Integer.class, ParameterMode.IN);
sp.registerStoredProcedureParameter("contentid", Integer.class, ParameterMode.IN);
sp.setParameter("firstname", testData.getFirstname());
sp.setParameter("secondname", testData.getSecondname());
sp.setParameter("contentid", testData.getContentid());
sp.execute();
}
}
2 个解决方案
解决方案1
1 2018-02-02 09:37:18
After discussion per chat I will provide you a working solution where you can specifiy any stuff by your own needs. 在每次聊天讨论之后，我将为您提供一个可行的解决方案，您可以根据自己的需要指定任何内容。
app.html: app.html：
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4">
<head>
<title></title>
</head>
<body>
<th:block th:if="${contentid != null}">
<div th:text="${'contentId: ' + contentid}"></div>
</th:block>
<form action="#" th:action="@{/app(contentid=${contentid})}" th:object="${TestData}"
method="post">
<div class="form-group">
<label for="firstname">First Name: </label>
<input type="text" class="form-control" id="firstname"
name="firstname" />
</div>
<div class="form-group">
<label for="secondname">Second Name:</label>
<input type="text" class="form-control" id="secondname"
name="secondname" />
</div>
<button type="submit" value="Submit">Submit</button>
</form>
</body>
</html>
Controller: 控制器：
@Controller
public class MyController {
@GetMapping("/app")
public String getApp(Model model) {
return "app";
}
@PostMapping("/app")
public String postApp(@RequestParam(required=false) Integer contentid, @ModelAttribute TestData testData, Model model, HttpServletRequest request) {
System.out.println(contentid);
if(contentid == null) {
contentid = ThreadLocalRandom.current().nextInt(0, 100 + 1);
}
model.addAttribute("contentid",contentid);
return "app";
}
}
解决方案2
0 2018-02-02 07:55:07
首先更改您的html代码th:action="@{/app?contentid=10} ，然后在TestData类中为实例变量添加setter和getter方法。
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