spring boot简单的访问

淩亂°似流年 2022-06-12 08:57 85阅读 0赞

spring boot项目采用的是maven依赖,打开第一节新建项目下的pom.xml文件,文件如下:

<?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.xyy</groupId>
    	<artifactId>SpringBootDemo</artifactId>
    	<version>1.0.0</version>
    	<packaging>war</packaging>
    	<name>SpringBootDemo</name>
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>1.3.2.RELEASE</version>
    		<relativePath />
    	</parent>
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    		<java.version>1.8</java.version>
    	</properties>
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-test</artifactId>
    			<scope>test</scope>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    	</dependencies>
    </project>

将如上直接copy到你的pom.xml即可.

若想支持maven打包,需要在pom.xml加上如下代码:

<build>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    				<executions>
    					<execution>
    						<goals>
    							<goal>repackage</goal>
    						</goals>
    					</execution>
    				</executions>
    			</plugin>
    			<plugin>
    				<groupId>org.apache.maven.plugins</groupId>
    				<artifactId>maven-surefire-plugin</artifactId>
    				<dependencies>  
    		          <dependency>  
    		            <groupId>org.codehaus.plexus</groupId>
    				    <artifactId>plexus-utils</artifactId>
    				    <version>3.0.20</version> 
    		          </dependency>  
    		        </dependencies>
    			</plugin>
    		</plugins>
    	</build>

接下来创建一个简单的restfull风格的LoginController,代码如下:

package com.xyy.controller;
    
    import java.util.HashMap;
    import java.util.Map;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * 简单测试
     * @ClassName: LoginController 
     * @author wangqinghua
     * @date 2017年7月20日 下午12:04:27
     */
    @RestController
    @RequestMapping("/login")
    public class LoginController {
    	private static final Logger LOGGER = LoggerFactory.getLogger(FavoriteController.class);
    	@RequestMapping("/login")
    	public Object login(String username,String password) {
    		Map<String,Object> resultMap = new HashMap<String,Object>();
    		try {
    			if("张三".equals(username) && "123456".equals(password)) {
    				resultMap.put("status", "success");
    			}else {
    				resultMap.put("status", "error");
    				resultMap.put("errorMsg", "账号或密码错误");
    			}
    		} catch (Exception e) {
    			resultMap.put("status", "error");
    			resultMap.put("errorMsg", "系统异常");
    			LOGGER.error("系统异常", e);
    		}
    		return resultMap;
    	}
    }

注:spring4开始支持@RestController注解风格,之前为@Controller

@RestController和@Controller区别在于@RestController更简洁话了json格式返回,其已包含@ResponseBody注解,如果要返回页面,有两种方法:

1:@RestController注解 方法返回new ModelAndView("/login")

2:@Controller注解 方法返回new ModelAndView("/login")或者"/login"

Spring boot关键点入口:如下图

![Center][]

需要在项目根目录出创建main主入口,并加入注解@SpringBootApplication,就像普通java项目的入口,一样,现在右键该main文件,run - Java Application,

出现

2017-07-20 13:43:57.924  INFO 11864 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
    2017-07-20 13:43:57.947  INFO 11864 --- [           main] com.xyy.Application                      : Started Application in 11.208 seconds (JVM running for 12.873)

就说名成功了.默认端口8080,如果需要更改端口,可以在application.properties文件配置

#项目访问端口
    server.port=8081

打开浏览器输入访问路径:

http://localhost:8081/login/login?username=%E5%BC%A0%E4%B8%89&password=123

结果如下:

![Center 1][]

是不是很简单?spring boot入门继续[ 第三节:spring boot整合mybatis][_spring boot_mybatis]![大笑][laugh.gif]

[Center]: /images/20220612/98c72661507d4922a40f6c24ea6ee664.png
[Center 1]: /images/20220612/48064a858e6840e39b26ee8567949ec1.png
[_spring boot_mybatis]: http://blog.csdn.net/u011271894/article/details/75517807
[laugh.gif]: /images/20220612/991ca4511e8842f4a732cfae1dee72e2.png