iSharkFly-Docs
/
java-tutorials
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

BAEL-3284: Guide to Flash Attributes in a Spring Web Application (#8070)

This commit is contained in:
Tapan Avasthi 2019-11-07 19:06:32 +05:30 committed by KevinGilmore
parent 78e23b246c
commit 940fabe5f5
6 changed files with 174 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
spring-mvc-simple-2/src/main/java/com/baeldung/flash_attributes/Application.java Normal file
View File

@ -0,0 +1,14 @@
package com.baeldung.flash_attributes;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
@SpringBootApplication
public class Application extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}

49
spring-mvc-simple-2/src/main/java/com/baeldung/flash_attributes/controllers/PoemSubmission.java Normal file
View File

@ -0,0 +1,49 @@
package com.baeldung.flash_attributes.controllers;
import com.baeldung.flash_attributes.model.Poem;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import org.springframework.web.servlet.support.RequestContextUtils;
import org.springframework.web.servlet.view.RedirectView;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
@Controller
public class PoemSubmission {
@GetMapping("/poem/success")
public String getSuccess(HttpServletRequest request) {
Map<String, ?> inputFlashMap = RequestContextUtils.getInputFlashMap(request);
if (inputFlashMap != null) {
Poem poem = (Poem) inputFlashMap.get("poem");
return "success";
} else {
return "redirect:/poem/submit";
}
}
@PostMapping("/poem/submit")
public RedirectView submitPost(
HttpServletRequest request,
@ModelAttribute Poem poem,
RedirectAttributes redirectAttributes) {
if (Poem.isValidPoem(poem)) {
redirectAttributes.addFlashAttribute("poem", poem);
return new RedirectView("/poem/success", true);
} else {
return new RedirectView("/poem/submit", true);
}
}
@GetMapping("/poem/submit")
public String submitGet(Model model) {
model.addAttribute("poem", new Poem());
return "submit";
}
}

39
spring-mvc-simple-2/src/main/java/com/baeldung/flash_attributes/model/Poem.java Normal file
View File

@ -0,0 +1,39 @@
package com.baeldung.flash_attributes.model;
import org.apache.logging.log4j.util.Strings;
public class Poem {
private String title;
private String author;
private String body;
public static boolean isValidPoem(Poem poem) {
return poem != null && Strings.isNotBlank(poem.getAuthor()) && Strings.isNotBlank(poem.getBody())
&& Strings.isNotBlank(poem.getTitle());
}
public String getTitle() {
return this.title;
}
public void setTitle(String title) {
this.title = title;
}
public String getBody() {
return this.body;
}
public void setBody(String body) {
this.body = body;
}
public String getAuthor() {
return this.author;
}
public void setAuthor(String author) {
this.author = author;
}
}

6
spring-mvc-simple-2/src/main/resources/application.properties
View File

@ -1,3 +1,9 @@
spring.main.allow-bean-definition-overriding=true spring.main.allow-bean-definition-overriding=true
spring.mail.host=localhost spring.mail.host=localhost
spring.mail.port=8025 spring.mail.port=8025
spring.thymeleaf.cache=false
spring.thymeleaf.enabled=true
spring.thymeleaf.prefix=classpath:/templates/
spring.thymeleaf.suffix=.html

50
spring-mvc-simple-2/src/main/resources/templates/submit.html Normal file
View File

@ -0,0 +1,50 @@
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Poetry Contest: Submission</title>
</head>
<body>
<form action="#" method="post" th:action="@{/poem/submit}" th:object="${poem}">
<table border='0' cellpadding='2' cellspacing='2' width='480px'>
<tr>
<td align='center'>
<label for="author">Author:</label>
</td>
<td>
<input th:field="*{author}" type="text"/>
</td>
</tr>
<tr>
<td align='center'>
<label for="title">Poem Title:</label>
</td>
<td>
<input th:field="*{title}" type="text"/>
</td>
</tr>
<tr>
<td align='center'>
<label for="body">Poem:</label>
</td>
<td>
<textarea cols="30" rows="30" th:field="*{body}"/>
</td>
</tr>
<tr>
<td align='center'>
<input type="submit" value="Submit Poem">
</td>
</tr>
</table>
</form>
</body>
</html>

15
spring-mvc-simple-2/src/main/resources/templates/success.html Normal file
View File

@ -0,0 +1,15 @@
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Poetry Contest: Thank You</title>
</head>
<body>
<h1 th:if="${poem}">
<p th:text="${'You have successfully submitted poem titled - '+ poem?.title}"/>
Click <a th:href="@{/poem/submit}"> here</a> to submit more.
</h1>
<h1 th:unless="${poem}">
Click <a th:href="@{/poem/submit}"> here</a> to submit a poem.
</h1>
</body>
</html>