項目中一般是這樣處理異常的:
import com.tellme.utils.ExceptionUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.exception.ExceptionUtils;
@Slf4j
public class TestExceptionUtils {
//處理異常的方式
private static void say() {
try {
int i = 1 / 0;
} catch (Exception e) {
//將e傳入,即保持了異常鏈的信息。否則的話,異常鏈便斷了。
throw new RuntimeException("xx", e);
}
}
}
org.apache.commons.lang3.exception.ExceptionUtils
工具類的用法:
import com.tellme.utils.ExceptionUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.exception.ExceptionUtils;
@Slf4j
public class TestExceptionUtils {
public static void main(String[] args) {
try {
say();
} catch (Exception e) {
log.error("", e);
System.out.println("----------");
//RuntimeException:xx (打印的是直接異常)
System.out.println("ExceptionUtils.getMessage(e):" + ExceptionUtils.getMessage(e));
//ArithmeticException: / by zero (打印的是根異常,但是若是拋出異常時,沒將跟異常向外拋出,那麼捕獲到的依舊是RuntimeException:xx)
System.out.println("ExceptionUtils.getRootCauseMessage(e):" + ExceptionUtils.getRootCauseMessage(e));
//打印的是異常堆棧信息
System.out.println("ExceptionUtils.getStackTrace(e):" + ExceptionUtils.getStackTrace(e));
//java.lang.ArithmeticException: / by zero (打印的是根異常,但是若是拋出異常時,沒將跟異常向外拋出,那麼返回null)
System.out.println("ExceptionUtils.getRootCause(e):" + ExceptionUtils.getRootCause(e));
//異常鏈中異常的數量:2
System.out.println("ExceptionUtils.getThrowableCount(e):" + ExceptionUtils.getThrowableCount(e));
//java.lang.ArithmeticException: / by zero 數組,第一位的的是根異常信息
System.out.println("ExceptionUtils.getRootCauseStackTrace(e)[0]:" + ExceptionUtils.getRootCauseStackTrace(e)[0]);
//java.lang.RuntimeException: xx 數組,第一位的是直接異常信息
System.out.println("ExceptionUtils.getStackFrames(e)[0]:" + ExceptionUtils.getStackFrames(e)[0]);
//異常鏈的數組:[java.lang.RuntimeException: xx, java.lang.ArithmeticException: / by zero]
System.out.println("ExceptionUtils.getThrowableList(e):" + ExceptionUtils.getThrowableList(e));
//自定義的異常鏈信息(打印直接異常的詳細信息):ExceptionUtil.getLogErrorMessage(e):xx||RuntimeException||com.tellme.test.TestExceptionUtils.say(TestExceptionUtils.java:38)
System.out.println("ExceptionUtil.getLogErrorMessage(e):" + ExceptionUtil.getLogErrorMessage(e));
}
}
private static void say() {
try {
int i = 1 / 0;
} catch (Exception e) {
//將e傳入,即保持了異常鏈的信息。否則的話,異常鏈便斷了。
throw new RuntimeException("xx", e);
}
}
}
自定義的異常類:
/**
* 獲取到異常描述
*
* @param e 異常信息
* @return "異常信息||異常類名||異常位置"
*/
public static String getLogErrorMessage(Exception e) {
return e.getMessage() + "||" + e.getClass().getSimpleName() + "||" + e.getStackTrace()[0];
}
可以將異常信息入庫,這樣便可以快速定位到問題原因。
通用的異常類
自定義異常可以這樣設置,將異常對象傳遞下來
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class BusinessException extends RuntimeException {
private static final Logger logger = LoggerFactory.getLogger(BusinessException.class);
private static final long serialVersionUID = 1L;
private String code = "";
private String msg = "";
//使用super(msg, cause)將異常對象組裝成鏈存儲起來
public BusinessException(String code, String msg, Throwable cause) {
super(msg, cause);
this.setCode(code);
this.setMsg(msg);
}
/**
*
*/
public BusinessException() {
super();
}
public BusinessException(String message) {
super(message);
}
/**
*
* @param message
* 消息
* @param cause
* 原因
*/
public BusinessException(String message, Throwable cause) {
super(message, cause);
this.setMsg(msg);
}
/**
*
* @param code
* @param msg
*/
public BusinessException(String code, String msg) {
super(msg);
this.setCode(code);
this.setMsg(msg);
}
/**
*
* @param cause
* 原因
*/
public BusinessException(Throwable cause) {
super(cause);
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
}