时间:2022-11-17 10:14:50 | 栏目:JAVA代码 | 点击:次
在之前的日志记录的写法中,我们大多是写一个工具类,在这个类里面定义日志保存的方法,然后再controller中执行请求的时候调用即可,虽然调用仅仅一行代码,但是不够友好;所有可以写一个类似于@Controller等的注解,在需要保存日志的方法上面加上一个注解,这样不用在每个都写一端代码;话不多说上代码
package com.sysmg.system.domain; import java.io.Serializable; import java.util.Date; import javax.persistence.Column; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.Table; import javax.persistence.Transient; import com.sysmg.common.annotation.ExportConfig; @Table(name = "t_log") public class SysLog implements Serializable { private static final long serialVersionUID = -8878596941954995444L; @Id @GeneratedValue(generator = "JDBC") @Column(name = "ID") private Long id; @Column(name = "USERNAME") @ExportConfig(value = "操作用户") private String username; @Column(name = "OPERATION") @ExportConfig(value = "描述") private String operation; @Column(name = "TIME") @ExportConfig(value = "耗时(毫秒)") private Long time; @Column(name = "METHOD") @ExportConfig(value = "操作方法") private String method; @Column(name = "PARAMS") @ExportConfig(value = "参数") private String params; @Column(name = "IP") @ExportConfig(value = "IP地址") private String ip; @Column(name = "CREATE_TIME") @ExportConfig(value = "操作时间", convert = "c:com.sysmg.common.util.poi.convert.TimeConvert") private Date createTime; @Column(name = "LOCATION") @ExportConfig(value = "地点") private String location; // 用于搜索条件中的时间字段 @Transient private String timeField; /** * @return ID */ public Long getId() { return id; } /** * @param id */ public void setId(Long id) { this.id = id; } /** * @return USERNAME */ public String getUsername() { return username; } /** * @param username */ public void setUsername(String username) { this.username = username == null ? null : username.trim(); } /** * @return OPERATION */ public String getOperation() { return operation; } /** * @param operation */ public void setOperation(String operation) { this.operation = operation == null ? null : operation.trim(); } /** * @return TIME */ public Long getTime() { return time; } /** * @param time */ public void setTime(Long time) { this.time = time; } /** * @return METHOD */ public String getMethod() { return method; } /** * @param method */ public void setMethod(String method) { this.method = method == null ? null : method.trim(); } /** * @return PARAMS */ public String getParams() { return params; } /** * @param params */ public void setParams(String params) { this.params = params == null ? null : params.trim(); } /** * @return IP */ public String getIp() { return ip; } /** * @param ip */ public void setIp(String ip) { this.ip = ip == null ? null : ip.trim(); } /** * @return CREATE_TIME */ public Date getCreateTime() { return createTime; } /** * @param createTime */ public void setCreateTime(Date createTime) { this.createTime = createTime; } public String getLocation() { return location; } public void setLocation(String location) { this.location = location; } public String getTimeField() { return timeField; } public void setTimeField(String timeField) { this.timeField = timeField; } }
package com.sysmg.common.annotation; 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 Log { String value() default ""; }
@Target(ElementType.METHOD)代表是方法上的注解,当然也可以是类注解,字段注解等
@Target(ElementType.TYPE) //接口、类、枚举、注解
@Target(ElementType.FIELD) //字段、枚举的常量
@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
@Retention(RetentionPolicy.RUNTIME)代表注解会被jvm保留,这个参数有三种
RetentionPolicy.SOURCE —— 这种类型的Annotations只在源代码级别保留,编译时就会被忽略
RetentionPolicy.CLASS —— 这种类型的Annotations编译时被保留,在class文件中存在,但JVM将会忽略
RetentionPolicy.RUNTIME —— 这种类型的Annotations将被JVM保留,所以他们能在运行时被JVM或其他使用反射机制的代码所读取和使用。
一般默认第三种
当然也可以写
@Documented和@Order(优先级 数字越小优先级越高)
@Documented 注解表明这个注解应该被 javadoc工具记录. 默认情况下,javadoc是不包括注解的. 但如果声明注解时指定了 @Documented,则它会被 javadoc 之类的工具处理, 所以注解类型信息也会被包括在生成的文档中。
@Order标记定义了组件的加载顺序,这个标记包含一个value属性。属性接受整形值。如:1,2 等等。值越小拥有越高的优先级。Ordered.HIGHEST_PRECEDENCE这个属性值是最高优先级的属性,它的值是-2147483648,对应的最低属性值是Ordered.LOWEST_PRECEDENCE,它的值是2147483647。
String value() default ""
这个代表是要传递的参数,类似
@Autowired(required=true) public @interface Autowired { /** * Declares whether the annotated dependency is required. * <p>Defaults to {@code true}. */ boolean required() default true; }
springmvc项目还需要开启切面编程
<aop:aspectj-autoproxy proxy-target-class="true"/>
springboot默认是开启的
package com.sysmg.common.aspect; import java.lang.reflect.Method; import java.util.Date; import javax.servlet.http.HttpServletRequest; import org.apache.shiro.SecurityUtils; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Pointcut; import org.aspectj.lang.reflect.MethodSignature; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.core.LocalVariableTableParameterNameDiscoverer; import org.springframework.stereotype.Component; import com.fasterxml.jackson.databind.ObjectMapper; import com.sysmg.common.annotation.Log; import com.sysmg.common.util.AddressUtilsBak; import com.sysmg.common.util.HttpContextUtils; import com.sysmg.common.util.IPUtils; import com.sysmg.system.domain.SysLog; import com.sysmg.system.domain.User; import com.sysmg.system.service.LogService; @Aspect @Component public class LogAspect { @Autowired private LogService logService; @Autowired ObjectMapper mapper; @Pointcut("@annotation(com.sysmg.common.annotation.Log)") public void pointcut() { } @Around("pointcut()") public Object around(ProceedingJoinPoint point) { Object result = null; long beginTime = System.currentTimeMillis(); try { result = point.proceed(); } catch (Throwable e) { e.printStackTrace(); } long time = System.currentTimeMillis() - beginTime; saveLog(point, time); return result; } private void saveLog(ProceedingJoinPoint joinPoint, long time) { User user = (User) SecurityUtils.getSubject().getPrincipal(); MethodSignature signature = (MethodSignature) joinPoint.getSignature(); Method method = signature.getMethod(); SysLog log = new SysLog(); Log logAnnotation = method.getAnnotation(Log.class); if (logAnnotation != null) { log.setOperation(logAnnotation.value()); } String className = joinPoint.getTarget().getClass().getName(); String methodName = signature.getName(); log.setMethod(className + "." + methodName + "()"); Object[] args = joinPoint.getArgs(); LocalVariableTableParameterNameDiscoverer u = new LocalVariableTableParameterNameDiscoverer(); String[] paramNames = u.getParameterNames(method); if (args != null && paramNames != null) { String params = ""; for (int i = 0; i < args.length; i++) { params += " " + paramNames[i] + ": " + args[i]; } log.setParams(params); } HttpServletRequest request = HttpContextUtils.getHttpServletRequest(); log.setIp(IPUtils.getIpAddr(request)); log.setUsername(user.getUsername()); log.setTime(time); log.setCreateTime(new Date()); log.setLocation(AddressUtilsBak.getRealAddressByIP(log.getIp(), mapper)); this.logService.save(log); } }
这里的实现类中日志添加的方法中使用的淘宝的获取ip服务,后续会加上去,其实这里面可以随便写一个实现方法,因为我是留工具备份,所以记录的较多
具体的@Aspect、@Pointcut、@Around、@Before、@After等aop相关的注解和参数需要自己去巩固一下知识
package com.sysmg.controller; import java.util.List; import java.util.Map; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import com.sysmg.common.annotation.Log; import com.sysmg.common.domain.QueryRequest; import com.sysmg.common.domain.ResponseBo; import com.sysmg.common.util.FileUtils; @Controller public class TestController{ @Log("规则") @RequestMapping("test") public String index() { return "test"; } }
大概这样就可以使用了,目前里面缺少aop相关知识的介绍以及获取访问ip的工具类,不过跟本课题关系不大,后续会更上去