如何将记录器注入样例Spring Boot应用程序中的字段？

Question

我想要的是让spring autowire成为伐木工人。所以，换句话说，我想让这个工作：

import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class MainController {

    @Autowired
    private Logger logger;
    
    @RequestMapping("/")
    public String enterSite(HttpServletResponse response) {
        logger.info("site entered");
        return "welcome";
    }
}

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.2.0.M1</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>

        <dependency>
            <groupId>postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>9.1-901.jdbc4</version>
        </dependency>
        <!-- <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> 
            </dependency> -->
    </dependencies>

它说，如果您使用其中一个初始POM（我有），则使用Logback--但用于内部日志记录。它能在我的课上被autowired吗？

Answer 1

如果这里的目标是减少代码，那么尝试Project Lombok。然后您甚至不需要声明记录器-只需添加一个注释并使用log而不是logger

所以上面的代码现在看起来如下所示：

import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
// import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import lombok.extern.slf4j.Slf4j;

@Slf4j
@Controller
public class MainController {

    @RequestMapping("/")
    public String enterSite(HttpServletResponse response) {
        log.info("site entered");
        return "welcome";
    }
}