spring boot学习(3) SpringBoot 之MVC 支持

第一节：@RequestMapping 配置url 映射

第二节：@Controller 处理http 请求

转发到一个页面，以前是转发到jsp页面，现在使用freemarker；

在pom.xml页面右键，spring-edit starters ，添加freemarker支持：spring-boot-starter-freemarker

pom.xml:

　　　　　　<dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-freemarker</artifactId>

        </dependency>

com.cy.controller.HelloWorldFreemarkerController.java:

package com.cy.controller;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.servlet.ModelAndView;

@Controller

@RequestMapping("/freemarker")

public class HelloWorldFreemarkerController {

    @RequestMapping("/say")

    public ModelAndView say(){

        ModelAndView mav=new ModelAndView();

        mav.addObject("message", "springboot你好！");

        mav.setViewName("helloWorld");

        return mav;

    }

}

freemarker模板是ftl为后缀的；src/main/resources/templates/helloWorld.ftl:

<!DOCTYPE html>

<html>

<head>

<meta charset="UTF-8">

<title>Insert title here</title>

</head>

<body>

show: ${message}

</body>

</html>

浏览器http://localhost:8888/HelloWorld/freemarker/say：显示：show: springboot你好！

第三节：@RestController 处理ajax 请求

第四节：@PathVariable 获取url 参数

第五节：@RequestParam 获取请求参数

例子如下：

com.cy.controller.HelloWorldAjaxController.java:

package com.cy.controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

@RestController

@RequestMapping("/ajax")

public class HelloWorldAjaxController {

    @RequestMapping("/hello")

    public String say(){

        return "{'message1':'SpringBoot你好','message2','Spring你好2'}";

    }

}

com.cy.controller.BlogController.java:

package com.cy.controller;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.servlet.ModelAndView;

@Controller

@RequestMapping("/blog")

public class BlogController {

    @RequestMapping("/{id}")

    public ModelAndView show(@PathVariable("id") Integer id){

        ModelAndView mav=new ModelAndView();

        mav.addObject("id", id);

        mav.setViewName("blog");

        return mav;

    }

    @RequestMapping("/query")

    public ModelAndView query(@RequestParam(value="q",required=false) String q){

        ModelAndView mav=new ModelAndView();

        mav.addObject("q", q);

        mav.setViewName("query");

        return mav;

    }

}

webapp/index.html:

<!DOCTYPE html>

<html>

<head>

<meta charset="UTF-8">

<title>Insert title here</title>

<script src="resources/jquery/jquery.min.js"></script>

<script type="text/javascript">

    function show(){

        $.post("ajax/hello",{},function(result){

            alert(result);

        });

    }

</script>

</head>

<body>

<button onclick="show()">点击</button>

<a href="/HelloWorld/blog/21">博客</a>

<a href="/HelloWorld/blog/query?q=123456">搜索</a>

</body>

</html>

src/main/resoureces/templates/blog.ftl:

<!DOCTYPE html>

<html>

<head>

<meta charset="UTF-8">

<title>Insert title here</title>

</head>

<body>

博客id:${id}

</body>

</html>

src/main/resources/templates/query.ftl:

<!DOCTYPE html>

<html>

<head>

<meta charset="UTF-8">

<title>Insert title here</title>

</head>

<body>

q: ${q}

</body>

</html>

测试：

浏览器：http://localhost:8888/HelloWorld/index.html

点击按钮：alert： {'message1':'SpringBoot你好','message2','Spring你好2'}

点击博客链接：转发页面，显示博客id:21

点击搜索，到页面http://localhost:8888/HelloWorld/blog/query?q=123456，显示q: 123456

秒客网

spring boot学习(3) SpringBoot 之MVC 支持

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