Spring MVC 表单提交
下面的例子展示了如何编写一个简单的基于Web的应用程序,它利用了使用Spring的Web MVC框架的HTML表单。要开始使用它,使用Eclipse IDE,并按照以下步骤使用Spring Web框架开发动态表单的Web应用程序:
步骤 | 描述 |
---|---|
1 | Create a Dynamic Web Project with a name HelloWeb and create a packagecom.yiibai under the src folder in the created project. |
2 | Drag and drop below mentioned Spring and other libraries into the folder WebContent/WEB-INF/lib. |
3 | Create a Java classes Student and StudentController under the com.yiibai package. |
4 | Create Spring configuration files Web.xml and HelloWeb-servlet.xml under theWebContent/WEB-INF folder. |
5 | Create a sub-folder with a name jsp under the WebContent/WEB-INF folder. Create a view files student.jsp and result.jsp under this sub-folder. |
6 | The final step is to create the content of all the source and configuration files and export the application as explained below. |
这里是Student.java文件的内容:
package com.yiibai;
public class Student {
private Integer age;
private String name;
private Integer id;
public void setAge(Integer age) {
this.age = age;
}
public Integer getAge() {
return age;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getId() {
return id;
}
}
以下是StudentController.java文件的内容:
package com.yiibai;
import org.springframework.stereotype.Controller;
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.servlet.ModelAndView;
import org.springframework.ui.ModelMap;
@Controller
public class StudentController {
@RequestMapping(value = "/student", method = RequestMethod.GET)
public ModelAndView student() {
return new ModelAndView("student", "command", new Student());
}
@RequestMapping(value = "/addStudent", method = RequestMethod.POST)
public String addStudent(@ModelAttribute("SpringWeb")Student student,
ModelMap model) {
model.addAttribute("name", student.getName());
model.addAttribute("age", student.getAge());
model.addAttribute("id", student.getId());
return "result";
}
}
在这里,第一个服务方法student(),我们已经通过名称“command”的ModelAndView对象的Student空对象,因为spring框架需要一个对象名称“command”,如果使用的是<form:form>标签在JSP文件中。因此,当student()方法被调用返回student.jsp视图。
第二个服务方法addStudent()将调用映射的URL HelloWeb/addStudent 的POST方法。您将根据所提交的信息,准备好模型对象。最后一个“result”视图会从服务方法返回,渲染result.jsp。
以下是Spring Web配置文件web.xml 的内容
<web-app id="WebApp_ID" version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Spring MVC Form Handling</display-name>
<servlet>
<servlet-name>HelloWeb</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>HelloWeb</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
下面是另一个Spring Web配置文件的HelloWeb-servlet.xml 内容
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="com.yiibai" />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
以下是Spring视图文件student.jsp的内容
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<html>
<head>
<title>Spring MVC Form Handling</title>
</head>
<body>
<h2>Student Information</h2>
<form:form method="POST" action="/HelloWeb/addStudent">
<table>
<tr>
<td><form:label path="name">Name</form:label></td>
<td><form:input path="name" /></td>
</tr>
<tr>
<td><form:label path="age">Age</form:label></td>
<td><form:input path="age" /></td>
</tr>
<tr>
<td><form:label path="id">id</form:label></td>
<td><form:input path="id" /></td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="Submit"/>
</td>
</tr>
</table>
</form:form>
</body>
</html>
以下是Spring视图文件result.jsp 的内容
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<html>
<head>
<title>Spring MVC Form Handling</title>
</head>
<body>
<h2>Submitted Student Information</h2>
<table>
<tr>
<td>Name</td>
<td>${name}</td>
</tr>
<tr>
<td>Age</td>
<td>${age}</td>
</tr>
<tr>
<td>ID</td>
<td>${id}</td>
</tr>
</table>
</body>
</html>
最后,下面是Spring和其他库包含在Web应用程序的列表。你只需将这些文件拖放它们的WebContent/ WEB-INF/ lib文件夹中。
-
commons-logging-x.y.z.jar
-
org.springframework.asm-x.y.z.jar
-
org.springframework.beans-x.y.z.jar
-
org.springframework.context-x.y.z.jar
-
org.springframework.core-x.y.z.jar
-
org.springframework.expression-x.y.z.jar
-
org.springframework.web.servlet-x.y.z.jar
-
org.springframework.web-x.y.z.jar
-
spring-web.jar
创建源代码和配置文件完成后,导出应用程序。右键单击应用程序和使用Export> WAR文件选项并保存SpringWeb.war文件到Tomcat的webapps文件夹中。
现在启动Tomcat服务器,并确保您能够访问来自的webapps文件夹中使用标准的浏览器。现在尝试一个URL http://localhost:8080/SpringWeb/student,你应该看到下面的结果:
提交必要的信息后点击提交按钮提交表单。应该看到下面的结果: