java web项目获取项目路径

1.方法一，获取项目运行时的真实类路径

/* private static Logger logger = Logger.getLogger(BookController.class); */
    @RequestMapping("/index")
    public String bookHandle(HttpServletRequest servlet) {
        
        //项目路径
        String filePath3 = request.getServletContext().getRealPath("/");
        System.out.println(filePath3);
        
        return "book";
    }

2.方法 二，获取项目运行时的真实类路径

/* private static Logger logger = Logger.getLogger(BookController.class); */
    @RequestMapping("/index")
    public String bookHandle(HttpServletRequest servlet) {
        
        String filePath4 = BookController.class.getClassLoader().getResource("static/json/book_nav.json").getPath();
        System.out.println(filePath4);
        
        return "book";
    }

 3.用spring 获取运行时类路径路径

String filePath = ClassUtils.getDefaultClassLoader().getResource("").getPath();

4.其它方法

package com.demo;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
 
import java.io.File;
 
 
@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class})
@RestController
public class Application {
     
    public static void main(String[] args) {
        SpringApplication.run(Application.class,args);
    }
     
    @GetMapping("/lujing")
    public void getLujing() throws Exception{
        //当前项目下路径
        File file = new File("");
        String filePath = file.getCanonicalPath();
        System.out.println(filePath);
 
        //当前项目下xml文件夹
        File file1 = new File("");
        String filePath1 = file1.getCanonicalPath()+File.separator+"xml\";
        System.out.println(filePath1);
 
        //获取类加载的根路径
        File file3 = new File(this.getClass().getResource("/").getPath());
        System.out.println(file3);
 
        //获取当前类的所在工程路径
        File file4 = new File(this.getClass().getResource("").getPath());
        System.out.println(file4);
 
        //获取所有的类路径 包括jar包的路径
        System.out.println(System.getProperty("java.class.path"));
    }
}

转： https://www.cnblogs.com/jiangfeilong/p/11106129.html