unit test
Steps:
1: Import the jar package. //hamcrest-core-1.3.jar junit-4.12.
2: Add a comment on the corresponding method
Annotation:
@Test //Indicates that the method is
tested @Before // Run before the tested method
@After //Run after the tested method
Note: The
test method must be " public, without return value, and without parameters ".
example:
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class TestDemo {
@Before
public void aa(){
System.out.println("first");
}
@Test
public void add(){
int sum = 0;
for (int i = 0; i < 10; i++) {
sum += i;
}
System.out.println(sum);
}
@After
public void bb(){
System.out.println("最后");
}
}
/*
first
45
最后*/
Log:
Steps:
1: Import the log4j jar package
2: Import the configuration file
3: Create a log object
Logger log = LoggerFactory.getLogger (current class.class);
4: Output log.
log.debug("debug Level log-detailed information");
log.info("info level log-general information");
log.warn("warn level log-warning information");
log.error("error level Log-error information");
Configuration:
### 设置日志的
log4j.rootLogger=info,my,fileAppender
log4j.appender.my=org.apache.log4j.ConsoleAppender
log4j.appender.my.ImmediateFlush = true
log4j.appender.my.Target=System.out
log4j.appender.my.layout=org.apache.log4j.PatternLayout
log4j.appender.my.layout.ConversionPattern=%d %t %5p %c{
1}:%L - %m%n
# fileAppender演示
log4j.appender.fileAppender=org.apache.log4j.FileAppender
log4j.appender.fileAppender.ImmediateFlush = true
log4j.appender.fileAppender.Append=true
log4j.appender.fileAppender.File=D:/log4j-log.log
log4j.appender.fileAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.fileAppender.layout.ConversionPattern=%d %5p %c{
1}:%L - %m%n
example:
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Test02slf4j {
//创建对象
private static final Logger LOGGER = LoggerFactory.getLogger(Test02slf4j.class);
@Test
public void run(){
System.out.println("hello");
LOGGER.debug("hello");
LOGGER.info("hello");
LOGGER.warn("hello");
LOGGER.error("hello");
try {
System.out.println(10/0);
} catch (Exception e) {
LOGGER.info("",e);
}
}
}
//输出在控制台
//输出信息会添加到指定文件中