javaobtain的简单介绍
本篇文章给大家谈谈javaobtain，以及对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。
本文目录一览：
- 1、java关于测试Dao层。Could not obtain transaction-synchronized Session for current thread
- 2、JAVA中变量初始化之后, 为什么还要做判空处理？
- 3、求Java大神帮忙解决这三道英文的java题
- 4、普元EOS用java怎么获取项目的路径的吗
java关于测试Dao层。Could not obtain transaction-synchronized Session for current thread
你的spring配置里，事务是只配到service层的，你看看配置里是不是...*.service....
JAVA中变量初始化之后, 为什么还要做判空处理？
你定义了一个变量，那么就要给这个变量赋值。当你赋值时，往往是用其他地方传过来的值进行赋值，所以其他地方的传值你没有判断是否为空，就赋给了变量。那么在你调用这个变量的时候，就要进行非空判断。否则可能会引起一系列异常
求Java大神帮忙解决这三道英文的java题
2. Write a program that uses a scanner object to read a double value that represents a temperature in degrees Celcius.
The program then computes and prints the equivalent temperature in degrees Farenheit.
[Obtain the conversion formula on the web.]
用一个扫描器（在java中呢，就是Scanner对象了)，读取一个表示摄氏度的Double类型的值，然后程序将其转换成华氏度，并打印出来。
Sample output:
输出的样本：
Please type a temperature in degrees Celcius: ..
请输入摄氏度：..
.. C = .. F
(C代表摄氏度 F代表华氏度）
Test the program with three sets of data and include the results in this report. Do not concern yourself with controlling the display of the decimal point.
在这份报告中需要包含三组数据和测试结果。显示的小数位数你不用关心（也就是说可以由你指定)
Solution (program):
解决方案(程序):
Output
输出
3. Write a program that uses a scanner object to read a value in $CA (Canadian Dollars). The program computes the equivalent amount in Euro and the equivalent in US dollars. The program then writes the result in the following form:
写一个程序，用扫描器对象读取加拿大元。然后程序等价转换为欧元和美元。随后程序按照下面的格式写出结果:
Please type a value in $CA: ..
请键入加拿大元:..
.. $CA = .. EUR = .. $US
You need to decide whether the variables should be of type int or double. Test the program with three sets of data and include the results in this report. Do not concern yourself with controlling the display of the decimal point.
你需要决定变量时Int类型还是Double类型。在这份报告中需要包含三组数据和测试结果。显示的小数位数随意。
Solution (program):
解决方案(程序):
Output
输出
4. Write a program that reads the cost of an item in $CA. The program then reads the GST tax rate as a percentage. The program then computes the sales tax on the cost. The program then computes the total amount payable and assigns the value to a variable of that name. The program then prints the tax payable and total amount payable in $CA and Euros. Test the program with three sets of data and include the results in this report. Do not concern yourself with controlling the display of the decimal point.
写一个程序读取用加拿大元表示的项目成本（也就是说，有一个项目花费了多少多少元，但是是按照加拿大元计算的）。然后程序程序读取增值税率。然后程序计算出花了多少税。然后程序计算出总共应付多少钱，把总共花的钱指定给一个变量。然后程序需要按照加拿大元和欧元打印出需要付的税和总金额。在这份报告中需要三组测试数据和测试结果。显示的小数位数随意。
Sample output:
输出示例：
Please type the cost in $CS: ..
请键入花费（按加拿大元):..
Please type the GST rate: ..
请键入增值税率:..
Total Sales Tax payable: ..
需要付的增值税：
Total Amount payable: .. $CA or .. EUR.
需要付的总金额：..（按加拿大元或者美元都行)
Solution (program):
解决方案（程序）:
Output
输出
参考代码：
package cn.stock.entity;
public class Test {
public static void main(String[] args) {
//对于需求一
cTof(32.1);
cTof(30);
cTof(32.2);
//对于需求二
convertDollar(800);
convertDollar(810);
convertDollar(820.88);
//对于需求三
caclAccount(3200.0,0.56);
caclAccount(3100.0,0.56);
caclAccount(3220.3,0.56);
}
//摄氏度转换为华氏度
public static void cTof(double tempC){
//华氏度 = 32 + 摄氏度 × 1.8
double tempF=32+1.8*tempC;
System.out.println(tempF);
}
//加元分别转换为欧元和美元
public static void convertDollar(double CA){
//1欧元=1.4083加元
double europ=1.4083*CA;
//1美元=1.1161加元
double usa=1.1161*CA;
System.out.println("转换为美元是："+europ+"\n转换为欧元是："+usa);
}
public static void caclAccount(double cost,double gstax){
//计算花费的税
double tax=cost*gstax;
//计算总共付的钱
double allCost=cost+tax;
//按照加拿大元输出(直接输出，即可,因为你传入的就是加元)
System.out.println("税："+tax+"\t总共应付："+allCost);
//按照欧元输出，首先要转换，乘以1.4083即可
System.out.println("欧元格式，税："+tax*1.4083+"\t总共应付："+allCost*1.4083);
}
}
普元EOS用java怎么获取项目的路径的吗
EOS项目中获取当前构件包配置目录下文件路径import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import com.eos.foundation.eoscommon.CommonUtil;
public abstract class AbstractConfigurationModelLoader {
public String obtainConfigurationAbsolutePath(String configurationFileName) {
String packageName = CommonUtil.getCurrentContributionName();
final String FORMAT_STR = ".xml";
if(configurationFileName == null || "".equals(configurationFileName)) {
throw new IllegalArgumentException("构件包：" + packageName + " 的配置文件名不能为空！");
} else if(configurationFileName.length() 5 ||
!FORMAT_STR.equals(configurationFileName.substring(configurationFileName.length() - 4, configurationFileName.length()))) {
throw new IllegalArgumentException("配置文件必须是XML格式的文件！");
}
String separator = File.separator;
String classesPath = AbstractConfigurationModelLoader.class.getClassLoader().getResource("").toString();
String classerDealPath = classesPath.substring(0, classesPath.length()-1);
String webInfPath = classerDealPath.substring(6, classerDealPath.lastIndexOf("/"));
String packagePath = webInfPath + separator + "_srv"+separator+"work"+separator+"user" +separator+ packageName;
String configFileAbsolutePath = packagePath + separator + "META-INF" + separator + configurationFileName;
return configFileAbsolutePath;
}
protected FileInputStream obtainConfigurationInputStream(String configurationAbsolutePath) throws FileNotFoundException {
File file = new File(configurationAbsolutePath);
return new FileInputStream(file);
}
}
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