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Spring Boot的Web开发

2016-07-23 20:23 405 查看
Spring Boot的Web开发

Spring Boot的Web开发支持

Spring Boot提供了spring-boot-starter-web为Web开发予以支持.它为我们提供了嵌入的Tomcat以及Spring MVC的依赖.

Thymeleaf模板引擎

Spring Boot 推荐使用Thymeleaf作为模板引擎.因为其提供了完整的Spring MVC支持.

因为使用嵌入的Servlet容器来运行JSP的话有一些小问题,内嵌Tomcat,Jetty不支持以jar的形式运行JSP,而且Undertow不支持JSP.

Thymeleaf基础知识

Thymeleaf是一个java类库,它是一个xml/xhtml/html5的模板引擎,可以作为MVC的Web应用的View层.

Thymeleaf基础知识

补充:

在javascript中访问model

<script th:inline="javascript">
var single=[[${singlePerson}]];
console.log(single.name + "/" + single.age);
</script>


Spring Boot的Thymeleaf支持

Spring Boot通过自动配置功能对Thymeleaf进行了自动配置,因此可以直接使用.

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org" lang="en">
<head>
<meta charset="UTF-8"/>
<meta http-equiv="X-UA-COMPATIBLE" content="IE=edge"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>Thymeleaf</title>
<link th:src="@{bootstrap/css/bootstrap.min.css}" rel="stylesheet"/>
<link th:src="@{bootstrap/css/bootstrap-theme.min.css}" rel="stylesheet"/>
<script th:src="@{js/jquery-2.2.3.js}" type="text/javascript"/>
<script th:src="@{bootstrap/js/bootstrap.min.js}"/>
<script>
$(function () {
console.log(123);
});
</script>
</head>
<body>
<div class="panel panel-primary">
<div class="panel-heading">
<h3 class="panel-title"> 访问model</h3>
</div>
<div class="panel-body">
<span th:text="${singlePerson.name}"></span>
</div>
</div>

<div th:if="${not #lists.isEmpty(people)}">
<div class="panel panel-primary">
<div class="panel-heading">
<h3 class="panel-title">列表</h3>
</div>
<div class="panel-body">
<ul class="list-group">
<li class="list-group-item" th:each="person:${people}">
<span th:text="${person.name}"></span>
<span th:text="${person.age}"></span>
<button class="btn" th:onclick="'getName(\''+${person.name}+'\');'">获得名字
</button>
</li>
</ul>
</div>
</div>
</div>
<script th:inline="javascript">
var single = [[${singlePerson}]];
console.log(single.name + "/" + single.age);
function getName(name) {
console.log(name);
}
</script>
</body>
</html>


package person.learn.thymeleaf;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.ArrayList;
import java.util.List;

/**
* 1.使用Thymeleaf作为模板引擎,要在application.yml里设置spring.thymeleaf.caching设置为false
* 2.用了模板引擎之后,原先对于jsp的设置无效
* 3.(idea编辑器需要手动点击CTRL+F9,手动编译,因为IDEA文件不需要手动保存)修改Thymeleaf模板的内容后,要不重启项目就生效的话,需要make一下,
* 或者使用热部署:http://mamicode.com/info-detail-1346413.html
* 4.要使用Thymeleaf模板 请将pom.xml中相应的jar依赖注释去掉
* Created by barton on 16-5-19.
*/
@Controller
public class ThymeleafController {

@RequestMapping("/thymeleaf")
public String index(Model model) {
Person single = new Person("aa", 11);

List<Person> people = new ArrayList<>();

Person p1 = new Person("xx", 11);
Person p2 = new Person("yy", 22);
Person p3 = new Person("zz", 33);

people.add(p1);
people.add(p2);
people.add(p3);

model.addAttribute("singlePerson", single);
model.addAttribute("people", people);

return "thymeleaf/thymeleaf";
}
}


package person.learn.thymeleaf;

/**
* Created by barton on 16-5-19.
*/
public class Person {

public Person(String name, Integer age) {
this.name = name;
this.age = age;
}

private String name;
private Integer age;

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public Integer getAge() {
return age;
}

public void setAge(Integer age) {
this.age = age;
}
}


Spring Boot自动配置的静态资源

类路径文件

把类路径下的/static,/public,/resources和/META-INF/resources文件夹下的静态文件直接映射为/,可以通过http://localhost:8080/来访问.

webjar

webjar就是将我们常用的脚本框架封装在jar包中的jar包.

把webjar的/META-INF/resources/webjars/下的静态文件映射为/webjar/,可以通过http://localhost:8080/webjar/ 来访问

Spring Boot 对静态首页的支持

classpath:/META-INF/resources/index.html

classpath:/resources/index.html

classpath:/static/index.html

classpath:/public/index.html

将Tomcat替换为Jetty

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>

<!-- 使用jetty替代tomcat,如果是使用jsp作为模板,则不能使用内嵌的jetty容器。 -->
<!-- 内嵌的jetty容器不支持jsp模板 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>


将Tomcat替换为Undertow

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-undertow</artifactId>
</dependency>


设置Favicon

只需将自己的favicon.ico 防止在类路径根目录,类路径META-INF/resources/下,类路径resources/下,类路径static/下或者类路径public/下.
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