# DefaultRuntimeException

默认的运行时异常

### 支持 `{}` 占位符,

示例:

```java
throw new DefaultRuntimeException("dataName:[{}],keys:[{}] can't be null/empty!", dataName, beans.keySet());
```

此外主要作用,是在异常message 中追加 cause exception信息,方便查看排查问题

### 示例1:

如下代码,使用原生RuntimeException

```java
  
  public void testRuntimeException(){
      try{
          int i = 1 / 0;
      }catch (Exception e){
          throw new RuntimeException("", e);
      }
  }
```

抛出的异常情况在控制台是这样的:

```java

java.lang.RuntimeException: 
    at com.feilong.core.DefaultRuntimeExceptionTest.testRuntimeException(DefaultRuntimeExceptionTest.java:63)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:606)
Caused by: java.lang.ArithmeticException: / by zero
    at com.feilong.core.DefaultRuntimeExceptionTest.testRuntimeException(DefaultRuntimeExceptionTest.java:61)
    ... 23 more
```

而如果使用 `DefaultRuntimeException`

```java
  
  public void testDefaultRuntimeException(){
      try{
          int i = 1 / 0;
      }catch (Exception e){
          throw new DefaultRuntimeException("", e);
      }
  }
  
```

抛出来的信息是这样的 :

```java
com.feilong.core.DefaultRuntimeException: <span style="color:red">java.lang.ArithmeticException: / by zero</span>
    at com.feilong.core.DefaultRuntimeExceptionTest.testDefaultRuntimeException(DefaultRuntimeExceptionTest.java:53)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)

Caused by: java.lang.ArithmeticException: / by zero
    at com.feilong.core.DefaultRuntimeExceptionTest.testDefaultRuntimeException(DefaultRuntimeExceptionTest.java:51)
    ... 23 more
```

### 示例2:

如下代码

```java
  
  public void testRuntimeExceptionMessage(){
      try{
          int i = 1 / 0;
      }catch (Exception e){
          throw new RuntimeException("exception", e);
      }
  }
  
```

抛出的异常情况在控制台是这样的:

```java
java.lang.RuntimeException: exception
    at com.feilong.core.DefaultRuntimeExceptionTest.testRuntimeExceptionMessage(DefaultRuntimeExceptionTest.java:105)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)
Caused by: java.lang.ArithmeticException: / by zero
    at com.feilong.core.DefaultRuntimeExceptionTest.testRuntimeExceptionMessage(DefaultRuntimeExceptionTest.java:103)
    ... 23 more
```

而如果使用 DefaultRuntimeException

```java
  public void testDefaultRuntimeExceptionMessageAppend(){
      try{
          int i = 1 / 0;
      }catch (Exception e){
          throw new DefaultRuntimeException("exception", e);
      }
  }
```

抛出来的信息是这样的 :

```java
com.feilong.core.DefaultRuntimeException: <span style="color:red">exception,cause by:[java.lang.ArithmeticException: / by zero]</span>
    at com.feilong.core.DefaultRuntimeExceptionTest.testDefaultRuntimeExceptionMessageAppend(DefaultRuntimeExceptionTest.java:95)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)
Caused by: java.lang.ArithmeticException: / by zero
    at com.feilong.core.DefaultRuntimeExceptionTest.testDefaultRuntimeExceptionMessageAppend(DefaultRuntimeExceptionTest.java:93)
    ... 23 more
  </pre>
```


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