Spring 常用技巧

Spring md5加密工具

String md5Result = org.springframework.util.DigestUtils.md5DigestAsHex("待加密字符串".getBytes());

从Spring容器中随时获取request

import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();

spring 允许跨域访问

//在controller方法中添加@CrossOrigin注解即可
@CrossOrigin
@RequestMapping("/hello")
public String hello(){
  return "hello";
}

使用spring注解读取配置文件内容

@Vaule("${XXXConfig}")
private String XXXConfig ;

解决迭代过程中springboot打包jar文件过大

1. 首先将依赖导出:mvn dependency:copy-dependencies 
2.运行：mvn dependency:tree 分析项目依赖树
3.用正则查找复制出所有依赖包的groupId
4.将groupId列表粘贴到excel中去重（数据-去除重复项）
5.修改maven打包配置如下：
<plugins>
    <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
        <configuration>
            <layout>ZIP</layout>
            <excludeGroupIds>
                org.springframework.boot,
                ...
            </excludeGroupIds>
        </configuration>
    </plugin>
</plugins>
6.运行：nohup java -Dloader.path=lib/ -Dspring.profiles.active=prod -jar xxx.jar &
备注：win系统可能无法正常运行，linux测试正常