SpringBoot--02.SpringBoot2.0搭建Web專案
阿新 • • 發佈：2018-12-03
一、靜態資源訪問
SpringBoot入門參考：https://blog.csdn.net/sswqzx/article/details/84560202
SpringBoot提供 了靜態資源預設配置：
Spring Boot預設提供靜態資源目錄位置需置於classpath下，目錄名需符合如下規則：
/static
/public
/resources
/META-INF/resources
舉例：我們可以在src/main/resources/目錄下建立static，在該位置放置一個圖片檔案。啟動程式後，嘗試訪問http://localhost:8080/test.jpg。如能顯示圖片，配置成功。
二、渲染Web頁面
在之前的示例中，我們都是通過@RestController來處理請求，所以返回的內容為json物件。那麼如果需要渲染html頁面的時候
現在我們就使用模板引擎來實現
Spring Boot提供了預設配置的模板引擎主要有以下幾種：
• Thymeleaf
• FreeMarker
• Velocity
• Groovy
• Mustache
Spring Boot建議使用這些模板引擎，避免使用JSP， 若一定要使用JSP將無法實現Spring Boot的多種特性，具體可見後文：支援JSP的配置, 當你使用上述模板引擎中的任何一個，它們預設的模板配置路徑為：src/main/resources/templates。當然也可以修改這個路徑， 具體如何修改，可在後續各模板引擎的配置屬性中查詢並修改。
三、使用Freemarker模板渲染web檢視
1、建立工程、pom.xml引入依賴
專案結構：
pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <!--springBoot父工程--> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.2.RELEASE</version> </parent> <groupId>com.day01springBoot</groupId> <artifactId>SpringBoot01</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <!--jdk版本--> <properties> <java.version>1.8</java.version> </properties> <!--web啟動器--> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- 引入freeMarker的依賴包. --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-freemarker</artifactId> </dependency> <!--jsp渲染檢視--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> </dependency> <dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-jasper</artifactId> </dependency> </dependencies> </project>
2、後臺程式碼
application.java
package com.springboot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* @ Author ：ShaoWei Sun.
* @ Date ：Created in 10:52 2018/11/27
*/
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class,args);
}
}
HelloController.java
package com.springboot.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* @ Author ：ShaoWei Sun.
* @ Date ：Created in 10:53 2018/11/27
*/
@Controller
public class HelloController {
@RequestMapping("/index")
public String testFreemarker(Map<String, Object> map){
map.put("name","java程式設計師！");
return "freemarker";
}
}
3、前臺程式碼
\src\main\resources\templates\freemarker.ftl(這個.ftl字尾名也可以改。在Freemarker配置檔案application.properties裡改)
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8" />
<title></title>
</head>
<body>
${name}
</body>
</html>
4、Freemarker遍歷集合
HelloController.java
package com.springboot.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* @ Author ：ShaoWei Sun.
* @ Date ：Created in 10:53 2018/11/27
*/
@Controller
public class HelloController {
@RequestMapping("/freemarkerIndex")
public String index(Map<String, Object> result) {
result.put("name", "ssw");
result.put("sex", "0");
List<String> listResult = new ArrayList<String>();
listResult.add("zhangsan");
listResult.add("lisi");
listResult.add("linux");
result.put("listResult", listResult);
return "other";
}
}application.java
package com.springboot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* @ Author ：ShaoWei Sun.
* @ Date ：Created in 10:52 2018/11/27
*/
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class,args);
}
}
other.ftl
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8" />
<title>首頁</title>
</head>
<body>
${name}
<#if sex=="0">
男
<#elseif sex=="2">
女
<#else>
其他
</#if>
<#list listResult as user>
${user}
</#list>
</body>
</html>
5、Freemarker配置檔案
#############################################
###FREEMARKER (FreeMarkerAutoConfiguration)
#############################################
#Freemarker配置
spring.freemarker.allow-request-override=false
spring.freemarker.cache=true
spring.freemarker.check-template-location=true
spring.freemarker.charset=UTF-8
spring.freemarker.content-type=text/html
spring.freemarker.expose-request-attributes=false
spring.freemarker.expose-session-attributes=false
spring.freemarker.expose-spring-macro-helpers=false
#spring.freemarker.request-context-attribute=
#spring.freemarker.settings.*=
#spring.freemarker.prefix=
#spring.freemarker.suffix=.ftl
spring.freemarker.suffix=.ftl
spring.freemarker.template-loader-path=classpath:/templates/
#comma-separated list
#spring.freemarker.view-names= # whitelist of view names that can be resolved
四、使用Jsp渲染web檢視(不用)
1、pom.xml引入依賴
結構：
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<!--springBoot父工程-->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.RELEASE</version>
</parent>
<groupId>com.day01springBoot</groupId>
<artifactId>SpringBoot01</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<!--jdk版本-->
<properties>
<java.version>1.8</java.version>
</properties>
<!--web啟動器-->
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 引入freeMarker的依賴包. -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
<!--jsp渲染檢視-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
</dependencies>
</project> 
2、配置Freemarker的配置檔案application.properties
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp
3、後臺程式碼
application.java
package com.springboot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* @ Author ：ShaoWei Sun.
* @ Date ：Created in 10:52 2018/11/27
*/
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class,args);
}
}HelloController.java
package com.springboot.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* @ Author ：ShaoWei Sun.
* @ Date ：Created in 10:53 2018/11/27
*/
@Controller
public class HelloController {
@RequestMapping("/jspindex")
public String jspadmin(){
return "admin";
}
}
