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I am using spring boot.My pom.xml is:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.ashwin</groupId>
<artifactId>spring_app_vemployee</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spring_app_vemployee</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/jstl/jstl -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>3.3.6</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>jquery</artifactId>
<version>1.9.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tomcat.embed/tomcat-embed-jasper -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<version>9.0.27</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
My controller is:
@Controller
@SessionAttributes("name")
public class TodoController {
@Autowired
private ToDoService toDoService;
@RequestMapping(value="/add-todo",method= RequestMethod.GET)
public String showAddToDoPage(ModelMap model){
model.addAttribute("todo", new Todo(0, "abc", "Default Desc",
new Date(), false));
return "todo";
}
}
The jsp it is going is todo.jsp.When I added the spring form then I began to see the error:
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<html>
<head>
<title>First web app</title>
<link href="webjars/bootstrap/3.3.6/css/bootstrap.min.css"
rel="stylesheet">
</head>
<body>
<div class="container">
<form:form method="post" commandName="todo">
<fieldset class="form-group">
<form:label path="desc">Description</form:label>
<form:input path="desc" type="text" class="form-control" required="required"/>
</fieldset>
</form:form>
</div>
<script src="webjars/jquery/1.9.1/jquery.min.js"></script>
<script src="webjars/bootstrap/3.3.6/js/bootstrap.min.js"></script>
</body>
</html>
The class which i tried to bind between model and controller is:
public class Todo {
private int id;
private String user;
private String desc;
private Date targetDate;
private boolean isDone;
public Todo() {
super();
}
public Todo(int id, String user, String desc, Date targetDate,
boolean isDone) {
super();
this.id = id;
this.user = user;
this.desc = desc;
this.targetDate = targetDate;
this.isDone = isDone;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUser() {
return user;
}
public void setUser(String user) {
this.user = user;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
public Date getTargetDate() {
return targetDate;
}
public void setTargetDate(Date targetDate) {
this.targetDate = targetDate;
}
public boolean getDone() {
return isDone;
}
public void setDone(boolean isDone) {
this.isDone = isDone;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + id;
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
Todo other = (Todo) obj;
if (id != other.id) {
return false;
}
return true;
}
@Override
public String toString() {
return String.format(
"Todo [id=%s, user=%s, desc=%s, targetDate=%s, isDone=%s]", id,
user, desc, targetDate, isDone);
}
}
But I am getting error as:
There was an unexpected error (type=Internal Server Error, status=500).
/WEB-INF/jsp/todo.jsp (line: [11], column: [0]) Unable to find setter method for attribute: [commandName]
org.apache.jasper.JasperException: /WEB-INF/jsp/todo.jsp (line: [11], column: [0]) Unable to find setter method for attribute: [commandName]
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:42)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:292)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:115)
at org.apache.jasper.compiler.Generator$GenerateVisitor.evaluateAttribute(Generator.java:3015)
at org.apache.jasper.compiler.Generator$GenerateVisitor.generateSetters(Generator.java:3235)
488
Try to use modelAttribute instead of the (deprecated) commandName in the form in your todo.jsp. That should probably fix it.
167
commandName is dead in Spring 5, so in todo.jsp:
<form:form method="post" commandName="todo">
Instead of commandName you should use modelAttribute like this:
<form:form method="post" modelAttribute="todo">
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