SpringBoot 创建SpringMVC项目
1.pom文件
<?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> <groupId>com.example</groupId> <artifactId>myweb</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <name>myweb Maven Webapp</name> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> </properties> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.9.RELEASE</version> <relativePath /> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--需要引入 jstl--> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> </dependency> <!--需要引入 tomcat-embed-jasper--> <dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-jasper</artifactId> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId>
<version>3.0.5</version> <executions> <execution> <goals> <goal>repackage</goal> </goals> </execution> </executions> </plugin> </plugins> </build> </project>
2.application.properties文件
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp
3.创建jsp页面
在文件夹 src/main/webapp/WEB-INF/jsp/下创建index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> hello jsp <p>${userInfo.name}</p> </body> </html>
常用标签库
<%@ taglib prefix="s" uri="http://www.springframework.org/tags"%> <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
4.创建controller
import com.example.myweb.domain.UserInfo; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpStatus; import org.springframework.http.MediaType; import org.springframework.http.ResponseEntity; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.*; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.File; import java.io.IOException; import java.nio.file.Files; import java.util.Date; import java.util.HashMap; import java.util.Map; @Controller public class HomeController { @GetMapping("/index") public String index() { return "index"; } /** * 返回ModelAndView ,视图为modelAndView实例中的view值 * * @return */ @RequestMapping(value = "/mav", method = RequestMethod.GET) public ModelAndView getModelAndView() { ModelAndView mav = new ModelAndView("modelandview_demo"); //mav.setViewName("admin"); //初始化时使用无参构造函数时,可使用此方法设置视图 mav.addObject("data", new UserInfo()); mav.addObject("time", new Date()); return mav; } /** * 返回string,视图为返回值 * * @param model * @return */ @RequestMapping(value = "/model", method = RequestMethod.GET) public String getModel(Model model) { //方法中的Model是接口，也可换成 ModelMap model.addAttribute("data", new UserInfo()); model.addAttribute("time", new Date()); return "model_demo"; } /** * 返回void时,视图为请求名 * * @param model */ @RequestMapping("/void_demo") public void getWelcome(Model model) { model.addAttribute("time", new Date()); } /** * 返回map ,视图为请求名 * * @return */ @RequestMapping("/map_demo") public Map<String, Object> getMap() { Map<String, Object> map = new HashMap<String, Object>(); map.put("key1", "value-1"); map.put("key2", "value-2"); map.put("time", new Date()); return map; } /** * 返回对像 ,视图为请求名 * jsp访问数据是userInfo * 等价于 model.addAttribute("userInfo", 返回值); * * @return */ //@ModelAttribute("data") @RequestMapping("/obj_demo") public UserInfo getObj() { return new UserInfo(1, "demo", new Date()); } /** * 返回json * * @return */ @RequestMapping("/json_demo") @ResponseBody public UserInfo getJson() { return new UserInfo(1, "demo", new Date()); } /** * 返回json * * @return */ @RequestMapping("/mydemo") public ResponseEntity<Map<String, Object>> responseEntity() { Map<String, Object> map = new HashMap<String, Object>(); map.put("message", "Hello Wrold"); return new ResponseEntity(map, HttpStatus.OK); } /** * post json * * @param user * @return */ @PostMapping("/useradd") public String postJson(@RequestBody UserInfo user) { return "newuser"; } /** * post form * * @param name * @param date * @return */ @RequestMapping(value = "/user/save", method = RequestMethod.POST) private String doSave(@RequestParam("name") String name, @RequestParam("date") Date date) { return "success"; } /** * post form * * @param user * @return */ @RequestMapping(value = "/user/save", method = RequestMethod.POST) private String doSave(@ModelAttribute UserInfo user) { //可以不添加@ModelAttribute注解 return "success"; } /** * 上传文件 * * @param file * @param req * @return */ @PostMapping("/upload") public String upload(@RequestParam("file") MultipartFile file, HttpServletRequest req) throws IOException { //也可以把MultipartFile 定义为一个对像的属性进行获取 //file.transferTo(new File("save.data")); // 判断文件是否为空，空则返回失败页面 if (file.isEmpty()) { return "failed"; } // 获取文件存储路径（绝对路径） String path = req.getServletContext().getRealPath("/upload"); // 获取原文件名 String fileName = file.getOriginalFilename(); // 创建文件实例 File filePath = new File(path, fileName); // 如果文件目录不存在，创建目录 if (!filePath.getParentFile().exists()) { filePath.getParentFile().mkdirs(); System.out.println("创建目录" + filePath); } // 写入文件 file.transferTo(filePath); return "success"; } /** * 下载文件 * * @param request * @param filename * @param model * @return * @throws IOException */ @RequestMapping(value = "/download", method = RequestMethod.GET) //匹配的是href中的download请求 public ResponseEntity<byte[]> download(HttpServletRequest request, @RequestParam("filename") String filename, Model model) throws IOException { String downloadFilePath = "D:\\userUploadFile\\Files";//从我们的上传文件夹中去取 File file = new File(downloadFilePath + File.separator + filename);//新建一个文件 HttpHeaders headers = new HttpHeaders();//http头信息 String downloadFileName = new String(filename.getBytes("UTF-8"), "iso-8859-1");//设置编码 headers.setContentDispositionFormData("attachment", downloadFileName); headers.setContentType(MediaType.APPLICATION_OCTET_STREAM); //MediaType:互联网媒介类型 contentType：具体请求中的媒体类型信息 return new ResponseEntity<byte[]>(Files.readAllBytes(file.toPath()), headers, HttpStatus.CREATED); } /** * 页面调转 * @return */ @RequestMapping("/jump") public String jump1(){ //转发方式1 return "index"; //转发方式2 return "forward:index"; //重定向方式 hello指的是requsrmapping return "redirect:index"; } /** * 页面跳转2 * @param req * @param resp * @throws Exception */ @RequestMapping("/resp") public void handleRequest(HttpServletRequest req, HttpServletResponse resp) throws Exception { //转发方式1 req.getRequestDispatcher("index.jsp").forward(req,resp); //转发方式2 resp.sendRedirect("index.jsp"); } }
5.启动类
import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class Application { public static void main(String[] args) { SpringApplication.run(Application.class,args); } }
6.生成war包发布到容器中
6.1修改pom 打包成war,并修改引用
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<!-- 排除内置容器，排除内置容器导出成 war 包可以让外部容器运行spring-boot项目 -->
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
6.2 在启动类同级目录创建文件ServletInitializer.java
import org.springframework.boot.builder.SpringApplicationBuilder; import org.springframework.boot.web.support.SpringBootServletInitializer; public class ServletInitializer extends SpringBootServletInitializer { @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder application) { return application.sources(Application.class); } }
