视图解析器
JSTLView视图
若项目中使用了JSTL，则SpringMVC会自动把视图由InternalResourceView转为JSTLView视图
若使用JSTL的fmt标签则需要在SpringMVC的配置文件中配置国际化资源文件
i18n.username=UserName
i18n.password=Password
i18n.username=用户名
i18n.password=密码 <?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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd">
<!-- 配置自定义扫描包 -->
<context:component-scan base-package="com.hous.springmvc.controller" />
<!-- 配置视图解析器：把handler方法返回值解析到实际的物理视图 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!-- 配置国际化资源 -->
<bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="i18n"></property>
</bean>
</beans>
页面设置（记住，这个页面一定要是经过SpringMVC转换过的页面，即JSTLView解析过的页面）
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>Hello shanshanbox.com</h1>
<h2>time: ${requestScope.time}</h2>
<h2>names: ${requestScope.names}</h2>
<h2>request user: ${requestScope.user}</h2>
<h2>session user: ${sessionScope.user}</h2>
<h2>request web: ${requestScope.web}</h2>
<h2>session web: ${sessionScope.web}</h2>
<fmt:message key="i18n.username" />
<fmt:message key="i18n.password" />
<fmt:formatNumber value="12" type="percent"/><br/>
</body>
</html>
自定义视图
package com.hous.springmvc.view;
import java.util.Date;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.View;
@Component
public class HelloView implements View {
@Override
public String getContentType() {
return "text/html";
}
@Override
public void render(Map<String, ?> model,
HttpServletRequest request, HttpServletResponse response) throws Exception {
response.getWriter().print("Hello World, now time is: " + new Date());
}
}
<!-- 配置BeanNameViewResolver视图解析器，使用视图的名字解析视图 -->
<!-- 通过order属性定义视图解析器的优先级，order值越小优先级越高 -->
<bean class="org.springframework.web.servlet.view.BeanNameViewResolver">
<property name="order" value="100"></property>
</bean> 重定向
一般情况下，控制器方法返回的字符串类型的值会被当成逻辑视图名处理
如果返回的字符串中带有forward：或redirect：前缀时，SpringMVC会对他们进行特殊处理：
将forward：和redirect：当成指示符，其后的字符串作为URL来处理
-redirect：success.jsp：会完成一个到success.jsp的重定向操作
-forward：success.jsp：会完成一个到success.jsp的转发操作
package com.hous.springmvc.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class JSTLController {
@RequestMapping("/testRedirect")
public String testRedirect() {
System.out.println("testRedirect");
return "redirect:/index.jsp";
}
}