【SpringBoot】单元测试进阶实战、自定义异常处理、t部署war项目到tomcat9和启动原理讲解
========================4、Springboot2.0单元测试进阶实战和自定义异常处理 ==============================
1、@SpringBootTest单元测试实战
简介：讲解SpringBoot的单元测试
1、引入相关依赖
<!--springboot程序测试依赖，如果是自动创建项目默认添加-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
2、使用
@RunWith(SpringRunner.class) //底层用junit SpringJUnit4ClassRunner
@SpringBootTest(classes={XdclassApplication.class})//启动整个springboot工程
public class SpringBootTests { }
2、SpringBoot测试进阶高级篇之MockMvc讲解
简介:讲解MockMvc类的使用和模拟Http请求实战
1、增加类注解 @AutoConfigureMockMvc
@SpringBootTest(classes={XdclassApplication.class})
2、相关API
perform：执行一个RequestBuilder请求
andExpect：添加ResultMatcher->MockMvcResultMatchers验证规则
andReturn：最后返回相应的MvcResult->Response
package com.atguigu.springboot; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; import org.springframework.test.web.servlet.MockMvc; import org.springframework.test.web.servlet.MvcResult; import org.springframework.test.web.servlet.request.MockMvcRequestBuilders; import org.springframework.test.web.servlet.result.MockMvcResultMatchers; /** * 功能描述：测试mockmvc类 * * <p> 创建时间：Apr 24, 2018 10:01:12 PM </p> * <p> 作者：小D课堂</p> */ @RunWith(SpringRunner.class) //底层用junit SpringJUnit4ClassRunner @SpringBootTest(classes={SpringBoot04WebRestfulcurdApplication.class}) //启动整个springboot工程 @AutoConfigureMockMvc public class MockMvcTestDemo { @Autowired private MockMvc mockMvc; @Test public void apiTest() throws Exception { MvcResult mvcResult = mockMvc.perform( MockMvcRequestBuilders.get("/test/home") ). andExpect( MockMvcResultMatchers.status().isOk() ).andReturn(); int status = mvcResult.getResponse().getStatus(); System.out.println(status); } }
3、SpringBoot2.x个性化启动banner设置和debug日志
简介：自定义应用启动的趣味性日志图标和查看调试日志
1、启动获取更多信息 java -jar xxx.jar --debug
2、修改启动的banner信息
1）在类路径下增加一个banner.txt，里面是启动要输出的信息
2）在applicatoin.properties增加banner文件的路径地址
spring.banner.location=banner.txt
3）官网地址 https://docs.spring.io/spring-boot/docs/2.1.0.BUILD-SNAPSHOT/reference/htmlsingle/#boot-features-banners
4、SpringBoot2.x配置全局异常实战
讲解：服务端异常讲解和SpringBoot配置全局异常实战
1、默认异常测试 int i = 1/0，不友好
2、异常注解介绍
@ControllerAdvice 如果是返回json数据 则用 RestControllerAdvice,就可以不加 @ResponseBody
//捕获全局异常,处理所有不可知的异常
@ExceptionHandler(value=Exception.class)
package com.atguigu.springboot.controller.domain; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletRequest; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.RestControllerAdvice; @RestControllerAdvice public class CustomeExtHandler { private static final Logger LOG = LoggerFactory.getLogger(CustomeExtHandler.class); //捕获全局异常,处理所有不可知的异常 @ExceptionHandler(value = Exception.class) //@ResponseBody Object handleException(Exception e, HttpServletRequest request) { LOG.error("url {}, msg {}", request.getRequestURL(), e.getMessage()); Map<String, Object> map = new HashMap<>(); map.put("code", 100); map.put("msg", e.getMessage()); map.put("url", request.getRequestURL()); return map; } }
5、SpringBoot2.x配置全局异常返回自定义页面
简介：使用SpringBoot自定义异常和错误页面跳转实战
1、返回自定义异常界面，需要引入thymeleaf依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
package com.atguigu.springboot.controller.domain; public class MyException extends RuntimeException { public MyException(String code, String msg) { this.code = code; this.msg = msg; } private String code; private String msg; public String getCode() { return code; } public void setCode(String code) { this.code = code; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } }
2、resource目录下新建templates,并新建error.html
ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName("error.html");
modelAndView.addObject("msg", e.getMessage());
return modelAndView;
https://docs.spring.io/spring-boot/docs/2.1.0.BUILD-SNAPSHOT/reference/htmlsingle/#boot-features-error-handling
package net.xdclass.demo.domain; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletRequest; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.RestControllerAdvice; import org.springframework.web.servlet.ModelAndView; @RestControllerAdvice public class CustomExtHandler { private static final Logger LOG = LoggerFactory.getLogger(CustomExtHandler.class); //捕获全局异常,处理所有不可知的异常 @ExceptionHandler(value=Exception.class) Object handleException(Exception e,HttpServletRequest request){ LOG.error("url {}, msg {}",request.getRequestURL(), e.getMessage()); Map<String, Object> map = new HashMap<>(); map.put("code", 100); map.put("msg", e.getMessage()); map.put("url", request.getRequestURL()); return map; } /** * 功能描述：处理自定义异常 * @return */ @ExceptionHandler(value=MyException.class) Object handleMyException(MyException e,HttpServletRequest request){ //进行页面跳转 // ModelAndView modelAndView = new ModelAndView(); // modelAndView.setViewName("error.html"); // modelAndView.addObject("msg", e.getMessage()); // return modelAndView; //返回json数据，由前端去判断加载什么页面 Map<String, Object> map = new HashMap<>(); map.put("code", e.getCode()); map.put("msg", e.getMsg()); map.put("url", request.getRequestURL()); return map; } }
package net.xdclass.demo.domain; /** * 功能描述：自定义异常类 * * <p> 创建时间：Apr 25, 2018 12:06:51 AM </p> * <p> 作者：小D课堂</p> */ public class MyException extends RuntimeException { public MyException(String code, String msg) { this.code = code; this.msg = msg; } private String code; private String msg; public String getCode() { return code; } public void setCode(String code) { this.code = code; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } }
package com.atguigu.springboot.controller; import com.atguigu.springboot.controller.domain.MyException; import com.atguigu.springboot.controller.domain.User; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController public class ExcptionController { @RequestMapping("/test_ext") public Object index(){ int i=1/0; return new User(11,"pwd_123","phone123"); } @RequestMapping("/my_ext") public Object myexc(){ throw new MyException("500","my exception"); } }
========================5、SpringBoot部署war项目到tomcat9和启动原理讲解 2节课==============================
加入小D课堂技术交流答疑群：Q群：699347262
1、SpringBoot启动方式讲解和部署war项目到tomcat9
简介：SpringBoot常见启动方式讲解和部署war项目Tomcat
1、ide启动
2、jar包方式启动
maven插件:
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
如果没有加，则执行jar包 ，报错如下
java -jar spring-boot-demo-0.0.1-SNAPSHOT.jar
no main manifest attribute, in spring-boot-demo-0.0.1-SNAPSHOT.jar
如果有安装maven 用 mvn spring-boot:run
项目结构
example.jar
|
+-META-INF
| +-MANIFEST.MF
+-org
| +-springframework
| +-boot
| +-loader
| +-<spring boot loader classes>
+-BOOT-INF
+-classes
| +-mycompany
| +-project
| +-YourClasses.class
+-lib
+-dependency1.jar
+-dependency2.jar
目录结构讲解
https://docs.spring.io/spring-boot/docs/2.1.0.BUILD-SNAPSHOT/reference/htmlsingle/#executable-jar-jar-file-structure
3、war包方式启动
1)在pom.xml中将打包形式 jar 修改为war <packaging>war</packaging>
构建项目名称 <finalName>xdclass_springboot</finalName>
2)tocmat下载 https://tomcat.apache.org/download-90.cgi
3)修改启动类
public class XdclassApplication extends SpringBootServletInitializer {
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(XdclassApplication.class);
}
public static void main(String[] args) throws Exception {
SpringApplication.run(XdclassApplication.class, args);
}
}
4)打包项目，启动tomcat
4、启动容器介绍和第三方测试数据讲解
使用Jmter测试工具测试性能(压力测试)，QPS（每秒查询书）,TPS（每秒失误数），RT（响应时间），判断容器的好坏
https://examples.javacodegeeks.com/enterprise-java/spring/tomcat-vs-jetty-vs-undertow-comparison-of-spring-boot-embedded-servlet-containers/
package net.xdclass.base_project; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.builder.SpringApplicationBuilder; import org.springframework.boot.web.servlet.support.SpringBootServletInitializer; @SpringBootApplication //一个注解顶下面3个 public class XdclassApplication extends SpringBootServletInitializer { @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder application) { return application.sources(XdclassApplication.class); } public static void main(String[] args) throws Exception { SpringApplication.run(XdclassApplication.class, args); } }
2、SpringBoot2.x启动原理概述
简介：讲解SpringBoot启动流程概述和基本加载案例
