在SSM框架中定义日志信息

Posted 2020-12-15 xie-qi

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一、首先定义一个log的日志（TLog.java）；

package entity;
import java.util.Date;
public class TLog {
  private Integer id;
  private String type;
  private Integer operator;
  private Date createtime;
  private String data;
  private String ip;
  private String content;
  public Integer getId() {
    return id;
  }
  public void setId(Integer id) {
    this.id = id;
  }
  public String getType() {
    return type;
  }
  public void setType(String type) {
    this.type = type;
  }
  public Integer getOperator() {
    return operator;
  }
  public void setOperator(Integer operator) {
    this.operator = operator;
  }
  public Date getCreatetime() {
    return createtime;
  }
  public void setCreatetime(Date createtime) {
    this.createtime = createtime;
  }
  public String getData() {
    return data;
  }
  public void setData(String data) {
    this.data = data;
  }
  public String getIp() {
    return ip;
  }
  public void setIp(String ip) {
    this.ip = ip;
  }
  public String getContent() {
    return content;
  }
  public void setContent(String content) {
    this.content = content;
  }
}

二、用自定义注解来来定义接口（Log.java）；

@Target({ElementType.METHOD})//指定注解添加到method方法上
@Retention(RetentionPolicy.RUNTIME)//指定作用域为运行时
public @interface Log {
    //定义接口方法,使用接口时，会当做注解的属性
    String description() default "";
    //日志操作类型，删除，修改，登录，查询，新增
    LogType logType();
}

三、利用枚举来定义日志的操作（LogType.java）;

/**
 * 枚举类，用来定义有限个的对象
 */
public enum LogType {
    LOGIN("1"),INSERT("2"),DELETE("3")
    ,SELECT("4"),UPDATE("5"),PASSWORD("6");
    //定义类中的属性和方法，跟写其他类一样
    private String type;
    LogType(String type){
        this.type=type;
    }
    public String getType() {
        return type;
    }
}

四、分别在mapper层和service层定义insert方法；

mapper层：
LogMapper.java
public interface LogMapper {
    int insert(TLog tLog);
}
LogMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="mapper.LogMapper">

    <insert id="insert">
        insert into T_LOG(id, type, operator, createtime, data, ip, content)
        values (SEQ_T_LOG.nextval,#{type},#{operator},#{createtime},#{data},#{ip},#{content})
    </insert>
</mapper>

service层：
LogService.java
public interface LogService {
    int insert(TLog tLog);
}
LogServiceImpl.java
@Service
public class LogServiceImpl implements LogService{
    @Autowired
    private LogMapper logMapper;
    @Override
    public int insert(TLog tLog) {
        return logMapper.insert(tLog);
    }
}

五、我们最后写一个切面的类来实现我们的日志（LogAspect.java）；

@Component
@Aspect
public class LogAspect2 {
    @Autowired
    private LogService logService;
    //定义切入点，使用注解的方法
    @Pointcut("@annotation(aop.Log)")
    public void logPointCut(){

    }

    @Before("logPointCut()")
    public void log(JoinPoint joinPoint) throws JsonProcessingException {
        //获取日志信息，封装成日志对象，并保存到数据库
        TLog tLog = new TLog();
        //获取到方法签名对象
        MethodSignature signature= (MethodSignature) joinPoint.getSignature();
        //通过方法签名对象获取方法对象
        Method method = signature.getMethod();
        //获取方法上面的特定注解
        Log logAnnotation = method.getAnnotation(Log.class);
        //描述信息
        String description = logAnnotation.description();
        //日志类型
        LogType logType = logAnnotation.logType();
        //获取到日志类型对应的数字，存入tLog对象中
        tLog.setType(logType.getType());
        //设置操作时间
        tLog.setCreatetime(new Date());
        //获取request对象
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = requestAttributes.getRequest();
        //获取客户端IP地址
        String ip = request.getRemoteUser();
        tLog.setIp(ip);
        //获取请求数据
        Map<String, String[]> parameterMap = request.getParameterMap();
        //创建JackSon的ObjectMapper对象，通过该对象将java对象转换成json
        ObjectMapper objectMapper = new ObjectMapper();
        //将java对象转换成json字符串
        String requestDataJsonStr = objectMapper.writeValueAsString(parameterMap);
        //将json字符串转换成java对象
      //  HashMap map=objectMapper.readValue(s, HashMap,class);
       // String content=description+",请求数据："+requestDataJsonStr;
        tLog.setContent(description);
        //设置请求数据
        tLog.setData(requestDataJsonStr);
        if (!(LogType.LOGIN ==logType)){//如果不是登录操作,获取操作人信息
            Admin admin = (Admin) request.getSession().getAttribute("admin");
            tLog.setOperator(admin.getId());
        }
        //将日志信息保存到数据库
        logService.insert(tLog);
    }
}