SpringMVC的工作原理與struts2的工作原理差不多,但比struts2更簡潔點
1. 導jar包
2. 創建自己起名的spring-servlet.xml文件
命名格式 名稱-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
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">
<!-- SpringMVC的註解已經注入 具體到掃描包-->
<context:component-scan base-package="controller"/>
<!-- SpringMVC中的controller中return的值傳遞給本xml文件，通過該下方式，拼接成相應jsp路徑
例如，return 個welcome，直接跳轉到/WEB-INF/jsp/welcome.jsp -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>3. web.xml編寫配置 (servlet-name中是自己起名的那個名稱)
<servlet>
<servlet-name>renjia</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>renjia</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>4.編寫jsp與Controller
index.jsp
<!-- jsp中表單提交傳遞action值到controller中，去找相應的註解，去調用對應的方法 -->
<form action="haha" method="post">
action(${action})<br>
姓名：<input type="text" name="name"/><br/>
年齡：<input type="text" name="age"/><br/>
參數：<input type="text" name="str1"/><br/>
<input type="submit" value="提交"/>
</form>welcome.jsp
<body>
<!-- EL表達式接受action傳來的參數 -->
welcome!!!${student.name}--->${student.age}---->${str1}
</body>MyController.class
package controller;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import bean.Student;
@Controller
public class MyController{
//1將index頁表格信息傳入welcome頁，用Map向頁面傳參數
@RequestMapping("/haha")
public String hello(Student student,String str1,Map<String,Object> context){
System.out.println(student.getName());
System.out.println(student.getAge());
System.out.println(str1);
context.put("student",student);
context.put("str1",str1);
return "welcome";
}
//2接受index頁面傳過來的三個參數 跟index中的name一樣
@RequestMapping("/hehe")
public String nihao(HttpServletRequest request,Model model){
System.out.println(request.getParameter("name"));
System.out.println(request.getParameter("age"));
System.out.println(request.getParameter("str1"));
//將student對象和頁面傳過來的str1放在model裏作爲一個整體的模型
Student student1 = new Student();
student1.setName(request.getParameter("name"));
student1.setAge(Integer.valueOf(request.getParameter("age")));
model.addAttribute("student",student1);
model.addAttribute("str1", request.getParameter("str1"));
return "welcome";
}
//3用字段的註解的形式創建字段對象，接收index頁面傳來的字段信息
@RequestMapping("/heihei")
public String hello1(@RequestParam(value="name") String name,
@RequestParam(value="age") int age,
@RequestParam(value="str1") String str1,
Map<String,Object> context){
//想讓傳遞的參數顯示在目標的話，傳遞方式（例Map）需要在傳遞前就要創建好，否則就會報500空指針
//不能在函數裏新創個Map對象來put值再顯示在頁面
System.out.println(name);
System.out.println(age);
System.out.println(str1);
Student student = new Student();
student.setAge(age);
student.setName(name);
context.put("student", student);
context.put("str1", str1);
return "welcome";
}
//直接用模型註解，將傳來的東西給塑造成一個模型給傳過來
@RequestMapping("/hengheng")
public String hello2(@ModelAttribute Student student,String str1,
Map<String,Object> context){
System.out.println(student.getAge());
System.out.println(student.getName());
System.out.println(str1);
context.put("student", student);
context.put("str1", str1);
return "welcome";
}
}
