目录
一，自定义注解
1.java注解式开发
?Java注解是附加在代码中的一些元信息，用于一些工具在编译、运行时进行解析和使用，起到说明、配置的功能。 注解相关类都包含在java.lang.annotation包中。
?JDK基本注解
?@Override：重写
@SuppressWarnings(value = "unchecked")；压制编辑器警告
JDK元注解
@Retention：定义注解的保留策略
@Retention(RetentionPolicy.SOURCE) ? ? ? ? ? ? //注解仅存在于源码中，在class字节码文件中不包含
@Retention(RetentionPolicy.CLASS) ? ? ? ? ? ? ?//默认的保留策略，注解会在class字节码文件中存在，但运行时无法获得，
@Retention(RetentionPolicy.RUNTIME) ? ? ? ? ? ?//注解会在class字节码文件中存在，在运行时可以通过反射获取到
@Target：指定被修饰的Annotation可以放置的位置(被修饰的目标)
@Target(ElementType.TYPE) ? ? ? ? ? ? ? ? ? ? ?//接口、类
@Target(ElementType.FIELD) ? ? ? ? ? ? ? ? ? ? //属性
@Target(ElementType.METHOD) ? ? ? ? ? ? ? ? ? ?//方法
@Target(ElementType.PARAMETER) ? ? ? ? ? ? ? ? //方法参数
@Target(ElementType.CONSTRUCTOR) ? ? ? ? ? ? ? //构造函数
@Target(ElementType.LOCAL_VARIABLE) ? ? ? ? ? ?//局部变量
@Target(ElementType.ANNOTATION_TYPE) ? ? ? ? ? //注解
@Target(ElementType.PACKAGE) ? ? ? ? ? ? ? ? ? //包
注：可以指定多个位置
例如：
@Target({ElementType.METHOD, ElementType.TYPE})，也就是此注解可以在方法和类上面使用
@Inherited：指定被修饰的Annotation将具有继承性
@Documented：指定被修饰的该Annotation可以被javadoc工具提取成文档.2.自定义注解
注解分类（根据Annotation是否包含成员变量,可以把Annotation分为两类）:
标记Annotation:
没有成员变量的Annotation; 这种Annotation仅利用自身的存在与否来提供信息元数据Annotation:
包含成员变量的Annotation; 它们可以接受(和提供)更多的元数据;
如何自定义注解？
使用@interface关键字, 其定义过程与定义接口非常类似, 需要注意的是:
? ?Annotation的成员变量在Annotation定义中是以无参的方法形式来声明的, 其方法名和返回值类型定义了该成员变量的名字和类型,而且我们还可以使用default关键字为这个成员变量设定默认值；
代码演示
案例一（获取类与方法上的注解值）
package com.dengxiyan.annotation.pi;
public enum TranscationModel {
Read, Write, ReadWrite
}package com.dengxiyan.annotation.pi;
import java.lang.annotation.*;
/**
* TestAnnotation1注解可以用在类、接口、属性、方法上
* 注解运行期也保留
* 不可继承
*/
@Target({ElementType.TYPE, ElementType.FIELD,ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface TestAnnotation1 {
String name();
}package com.dengxiyan.annotation.pi;
import java.lang.annotation.*;
/**
* TestAnnotation2注解可以用在方法上
* 注解运行期也保留
* 不可继承
*/
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface TestAnnotation2{
TranscationModel model() default TranscationModel.ReadWrite;
}package com.dengxiyan.annotation.pi;
import java.lang.annotation.*;
/**
* TestAnnotation3注解可以用在方法上
* 注解运行期也保留
* 可继承
*/
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface TestAnnotation3 {
TranscationModel[] models() default TranscationModel.ReadWrite;
}测试
package com.dengxiyan.annotation.pi;
/**
* 获取类与方法上的注解值
*/
@TestAnnotation1(name = "aaa")
public class Demo1 {
@TestAnnotation1(name = "dxy")
private Integer age;
@TestAnnotation2(model = TranscationModel.Read)
public void list() {
System.out.println("list");
}
@TestAnnotation3(models = {TranscationModel.Read, TranscationModel.Write})
public void edit() {
System.out.println("edit");
}
}package com.dengxiyan.annotation.pi;
import org.junit.Test;
public class Demo1Test {
@Test
public void list() throws Exception {
// 获取类上的注解
TestAnnotation1 annotation1 = Demo1.class.getAnnotation(TestAnnotation1.class);
System.out.println(annotation1.name());
// 获取方法上的注解
TestAnnotation2 testAnnotation2 = Demo1.class.getMethod("list").getAnnotation(TestAnnotation2 .class);
System.out.println(testAnnotation2 .model());
// 获取属性上的注解
TestAnnotation1 testAnnotation1 = Demo1.class.getDeclaredField("age").getAnnotation(testAnnotation1 .class);
System.out.println(testAnnotation1 .name());
}
@Test
public void edit() throws Exception {
TestAnnotation3 testAnnotation3 = Demo1.class.getMethod("edit").getAnnotation(TestAnnotation3.class);
for (TranscationModel model : testAnnotation3 .models()) {
System.out.println(model);//Read,Write
}
}
}案例二（获取类属性上的注解属性值）
package com.dengxiyan.annotation.p2;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
//@Retention(RetentionPolicy.SOURCE)
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface TestAnnotation {
String value() default "默认value值";
String what() default "这里是默认的what属性对应的值";
}package com.dengxiyan.annotation.p2;
/**
* 获取类属性上的注解属性值
*/
public class Demo2 {
@TestAnnotation(value = "这就是value对应的值_msg1", what = "这就是what对应的值_msg1")
private static String msg1;
@TestAnnotation("这就是value对应的值1")
private static String msg2;
@TestAnnotation(value = "这就是value对应的值2")
private static String msg3;
@TestAnnotation(what = "这就是what对应的值")
private static String msg4;
}测试代码
package com.dengxiyan.annotation.p2;
import org.junit.Test;
public class Demo2Test {
@Test
public void test1() throws Exception {
TestAnnotation msg1 = Demo2.class.getDeclaredField("msg1").getAnnotation(TestAnnotation.class);
System.out.println(msg1.value());
System.out.println(msg1.what());
}
@Test
public void test2() throws Exception{
TestAnnotation msg2 = Demo2.class.getDeclaredField("msg2").getAnnotation(TestAnnotation.class);
System.out.println(msg2.value());
System.out.println(msg2.what());
}
@Test
public void test3() throws Exception{
TestAnnotation msg3 = Demo2.class.getDeclaredField("msg3").getAnnotation(TestAnnotation.class);
System.out.println(msg3.value());
System.out.println(msg3.what());
}
@Test
public void test4() throws Exception{
TestAnnotation msg4 = Demo2.class.getDeclaredField("msg4").getAnnotation(TestAnnotation.class);
System.out.println(msg4.value());
System.out.println(msg4.what());
}
}?3.Aop自定义注解的应用
代码演示
pom.xml依赖
<?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.zking</groupId>
<artifactId>selenium280</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>selenium280 Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<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>
<maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version>
<!--添加jar包依赖-->
<!--1.spring 5.0.2.RELEASE相关-->
<spring.version>5.0.2.RELEASE</spring.version>
<!--2.mybatis相关-->
<mybatis.version>3.4.5</mybatis.version>
<!--mysql-->
<mysql.version>5.1.44</mysql.version>
<!--pagehelper分页jar依赖-->
<pagehelper.version>5.1.2</pagehelper.version>
<!--mybatis与spring集成jar依赖-->
<mybatis.spring.version>1.3.1</mybatis.spring.version>
<!--3.dbcp2连接池相关 druid-->
<commons.dbcp2.version>2.1.1</commons.dbcp2.version>
<commons.pool2.version>2.4.3</commons.pool2.version>
<!--4.log日志相关-->
<log4j2.version>2.9.1</log4j2.version>
<log4j2.disruptor.version>3.2.0</log4j2.disruptor.version>
<slf4j.version>1.7.13</slf4j.version>
<!--5.其他-->
<junit.version>4.12</junit.version>
<servlet.version>4.0.0</servlet.version>
<lombok.version>1.18.2</lombok.version>
</properties>
<dependencies>
<!--1.spring相关-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!--2.mybatis相关-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!--pagehelper分页插件jar包依赖-->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>${pagehelper.version}</version>
</dependency>
<!--mybatis与spring集成jar包依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!--3.dbcp2连接池相关-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>${commons.dbcp2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>${commons.pool2.version}</version>
</dependency>
<!--4.log日志相关依赖-->
<!-- log4j2日志相关依赖 -->
<!-- log配置：Log4j2 + Slf4j -->
<!-- slf4j核心包-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${slf4j.version}</version>
<scope>runtime</scope>
</dependency>
<!--核心log4j2jar包-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--用于与slf4j保持桥接-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--web工程需要包含log4j-web，非web工程不需要-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>${log4j2.version}</version>
<scope>runtime</scope>
</dependency>
<!--需要使用log4j2的AsyncLogger需要包含disruptor-->
<dependency>
<groupId>com.lmax</groupId>
<artifactId>disruptor</artifactId>
<version>${log4j2.disruptor.version}</version>
</dependency>
<!--5.其他-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${servlet.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- jsp文件中c标签的使用-->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>3.141.59</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>RELEASE</version>
<scope>compile</scope>
</dependency>
</dependencies>
<build>
<finalName>selenium280</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>8</source>
<target>8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!--1. 注解式开发 -->
<!-- 注解驱动 -->
<context:annotation-config/>
<!-- 用注解方式注入bean，并指定查找范围：com.javaxl.ssh2及子子孙孙包-->
<context:component-scan base-package="com.zking"/>
<!--开启动态代理-->
<aop:aspectj-autoproxy />
</beans>自定义注解?
package com.dengxiyan.annotation.aop;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface MyLog {
String desc();
}?应用注解
package com.dengxiyan.annotation.aop;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
@Component
@Aspect
public class MyLogAspect {
private static final Logger logger = LoggerFactory.getLogger(MyLogAspect.class);
/**
* 只要用到了com.dnegxiyan.p2.annotation.springAop.MyLog这个注解的，就是目标类
*/
@Pointcut("@annotation(com.dengxiyan.annotation.aop.MyLog)")
private void MyValid() {
}
@Before("MyValid()")
public void before(JoinPoint joinPoint) {
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
logger.debug("[" + signature.getName() + " : start.....]");
System.out.println("[" + signature.getName() + " : start.....]");
MyLog myLog = signature.getMethod().getAnnotation(MyLog.class);
logger.debug("【目标对象方法被调用时候产生的日志，记录到日志表中】："+myLog.desc());
System.out.println("【目标对象方法被调用时候产生的日志，记录到日志表中】：" + myLog.desc());
}
}package com.dengxiyan.annotation.aop;
import org.springframework.stereotype.Component;
@Component
public class LogController {
@MyLog(desc = "这是结合spring aop知识，讲解自定义注解应用的一个案例")
public void testLogAspect(){
System.out.println("这里随便来点啥");
}
}二，Springboot入门
1.简介
springboot是什么？
Spring Boot它本身并不提供Spring框架的核心特性以及扩展功能，只是用于快速、敏捷地开发新一代基于Spring框架的应用程序。
也就是说，它并不是用来替代Spring的解决方案，而是和Spring框架紧密结合用于提升Spring开发者体验的工具同时它集成了大量常用的第三方库配置（例如Jackson, JDBC, Mongo, Redis, Mail等等），
Spring Boot应用中这些第三方库几乎可以零配置的开箱即用（out-of-the-box），大部分的Spring Boot应用都
只需要非常少量的配置代码，开发者能够更加专注于业务逻辑
特点：一站式解决方案 不是框架 ?敏捷式开发；开箱即用；?
2.入门
创建项目步骤
①依靠start.spring.io的网站进行项目构建
②构建Springboot项目尽可能依靠阿里的镜像网站进项构建，能够在一定程度上加快Springboot项目的构建
可以换源
http://start.aliyun.com?
?
点击下一步默认勾选web、lombok、Mybatis组件
?
项目结构（简单描述）
?项目结构：
src
????????main?? ??? ?java
????????????????resource
????????????????????????static 放静态资源
????????????????????????????????template ?存放页面，相当于以前jsp的maven项目中的webAPP目录
????????????????????????????????????????application.yml Springboot项目中唯一的一个配置文件
代码演示?
默认配置不加载数据源
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
public class Testspringboot02Application {
public static void main(String[] args) {
SpringApplication.run(Testspringboot02Application.class, args);
}
}安装 Convert YAML and Properties File 的插件
?application.propertie
# 应用名称
spring.application.name=testspringboot02
# 应用服务 WEB 访问端口
server.port=8081
#下面这些内容是为了让MyBatis映射
#指定Mybatis的Mapper文件
mybatis.mapper-locations=classpath:mappers/*xml
#指定Mybatis的实体目录
mybatis.type-aliases-package=com.zking.testspringboot02.mybatis.entity选中application.properties右键点击 Convert YAML and Properties File?
?
?application.yml（格式发生改变）
mybatis:
mapper-locations: classpath:mappers/**/*.xml
type-aliases-package: com.dengxiyan.springbootptmp.book.model
server:
port: 8082
spring:
application:
name: springbootptmp
datasource:
driver-class-name: com.mysql.jdbc.Driver
name: defaultDataSource
password: 123456
url: jdbc:mysql://localhost:3306/db_zsgc?useUni code=true&characterEncoding=UTF-8
username: root
测试结果访问你所写的port端口号即可。
3.响应封装类配置
?Result.java（响应封装类）
package com.dengxiyan.testspringboot02.result;
public class Result<T> {
private int code;
private String msg;
//因为返回的数据不知道是什么类型，所以定义一个泛型
private T data;
private long total;
public long getTotal() {
return total;
}
public void setTotal(long total) {
this.total = total;
}
/**
* 成功的时候调用
*/
public static <T> Result<T> ok(T data) {
return new Result<T>(data);
}
public static <T> Result<T> ok(int code,String msg) {
return new Result<>(code,msg);
}
public static <T> Result<T> ok(int code,String msg,T data) {
Result<T> success = ok(data);
success.setCode(code);
success.setMsg(msg);
return success;
}
public static <T> Result<T> ok(int code,String msg,T data,long total) {
Result<T> success = ok(code,msg,data);
success.setTotal(total);
return success;
}
/**
* 失败的时候调用
*/
public static <T> Result<T> error(CodeMsg codeMsg) {
return new Result<T>(codeMsg);
}
private Result(T data) {
this.data = data;
}
private Result(int code, String msg) {
this.code = code;
this.msg = msg;
}
private Result(CodeMsg codeMsg) {
if (codeMsg != null) {
this.code = codeMsg.getCode();
this.msg = codeMsg.getMsg();
}
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public T getData() {
return data;
}
public void setData(T data) {
this.data = data;
}
}CodeMsg.java(相关的错误通用码)
package com.dengxiyan.testspringboot02.result;
public class CodeMsg {
private int code;
private String msg;
//通用的错误码
public static CodeMsg SUCCESS = new CodeMsg(200, "success");
public static CodeMsg SERVER_ERROR = new CodeMsg(500, "服务端异常");
public static CodeMsg BIND_ERROR = new CodeMsg(500101, "参数校验异常：%s");
public static CodeMsg REQUEST_ILLEGAL = new CodeMsg(500102, "请求非法");
public static CodeMsg ACCESS_LIMIT_REACHED = new CodeMsg(500104, "访问太频繁！");
//登录模块5002XX
public static CodeMsg SESSION_ERROR = new CodeMsg(500210, "Session不存在或者已经失效");
public static CodeMsg PASSWORD_EMPTY = new CodeMsg(500211, "登录密码不能为空");
public static CodeMsg MOBILE_EMPTY = new CodeMsg(500212, "手机号不能为空");
public static CodeMsg MOBILE_ERROR = new CodeMsg(500213, "手机号格式错误");
public static CodeMsg MOBILE_NOT_EXIST = new CodeMsg(500214, "手机号不存在");
public static CodeMsg PASSWORD_ERROR = new CodeMsg(500215, "密码错误");
//商品模块5003XX
//订单模块5004XX
public static CodeMsg ORDER_NOT_EXIST = new CodeMsg(500400, "订单不存在");
//秒杀模块5005XX
public static CodeMsg MIAO_SHA_OVER = new CodeMsg(500500, "商品已经秒杀完毕");
public static CodeMsg REPEATE_MIAOSHA = new CodeMsg(500501, "不能重复秒杀");
public static CodeMsg MIAOSHA_FAIL = new CodeMsg(500502, "秒杀失败");
private CodeMsg() {
}
private CodeMsg(int code, String msg) {
this.code = code;
this.msg = msg;
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public CodeMsg fillArgs(Object... args) {
int code = this.code;
String message = String.format(this.msg, args);
return new CodeMsg(code, message);
}
@Override
public String toString() {
return "CodeMsg [code=" + code + ", msg=" + msg + "]";
}
}使用响应封装类之后
package com.dengxiyan.testspringboot02.web;
import com.dengxiyan.testspringboot02.result.CodeMsg;
import com.dengxiyan.testspringboot02.result.Result;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.Arrays;
@RestController
@RequestMapping("/demo2")
public class DemoController2 {
@RequestMapping("/list")
public Result list(){
return Result.ok(200,"查询成功",
Arrays.asList(
new Demo(1,"足球"),
new Demo(2,"篮球"),
new Demo(3,"排球"),
new Demo(4,"羽毛球"),
new Demo(5,"台球")
),168);
}
@RequestMapping("/add")
public Result add(){
return Result.ok(200,"新增成功");
}
@RequestMapping("/load")
public Result load(){
return Result.ok(200,"加载成功",new Demo(3,"排球"));
}
@RequestMapping("/edit")
public Result edit(){
return Result.ok(200,"修改成功");
}
@RequestMapping("/delete")
public Result delete(){
return Result.ok(200,"删除成功");
}
@RequestMapping("/queryByUser")
public Result queryByUser(){
return Result.error(CodeMsg.BIND_ERROR.fillArgs("密码等级太低"));
}
}结论：
访问的两个链接查询结果是一样的，明显使用响应封装类配置后代码更加简介了