我想从 Host.txt 和 Instance.txt 中读取数据，我能够读取数据，但我不知道它是怎么回事联！
以下是主机文件：
Host ID Number of Slots Data Centre
======= =============== ============
2, 4, 0
5, 4, 0
7, 3, 0
9, 3, 1
3, 3, 1
10, 2, 2
6, 4, 2
8, 2, 2
以下是实例文件：
Instance ID Customer Host ID
=========== ========= =======
1, 8, 2
2, 8, 2
3, 8, 2
4, 8, 7
5, 15, 7
6, 16, 9
7, 13, 9
8, 9, 3
9, 13, 3
10, 16, 5
11, 15, 8
12, 8, 6
13, 16, 8
14, 9, 9
15, 9, 7
以下是我用来读取文件的代码：
public class CloudStructure {
public static void main(String[] args) {
readHost("C:\\tmp\\HostState.txt");
readInstance("C:\\tmp\\InstanceState.txt");
}
public static void readHost(String filePath)
{
String line = "";
ArrayList<String> host = new ArrayList<String>();
ArrayList<String> slot = new ArrayList<String>();
ArrayList<String> centre = new ArrayList<String>();
CloudStructureData getHostTxtData = new CloudStructureData();
FileReader fr;
BufferedReader br;
String[] HostID = null;
String[] Slots = null;
String[] DataCentre = null;
try {
fr = new FileReader(filePath);
br = new BufferedReader(fr);
while((line = br.readLine()) != null)
{
HostID = line.split(",");
Slots = line.split(",");
DataCentre = line.split(",");
host.add(HostID[0]);
slot.add(Slots[1]);
centre.add(DataCentre[2]);
}
}
catch(FileNotFoundException fN) {
fN.printStackTrace();
}
catch(IOException e) {
System.out.println(e);
}
getHostTxtData.setHostID(host);
getHostTxtData.setSlot(slot);
getHostTxtData.setCentre(centre);
System.out.println("Host File");
System.out.println("=============");
System.out.println("Hosts: " + getHostTxtData.getHostID());
System.out.println("Slots: " + getHostTxtData.getSlot());
System.out.println("DataCentre: " + getHostTxtData.getCentre());
}
public static void readInstance(String filePath)
{
String line = "";
ArrayList<String> instance = new ArrayList<String>();
ArrayList<String> customer = new ArrayList<String>();
ArrayList<String> host = new ArrayList<String>();
CloudStructureData getHostTxtData = new CloudStructureData();
FileReader fr;
BufferedReader br;
String[] InstanceId = null;
String[] CustId = null;
String[] HostId = null;
try {
fr = new FileReader(filePath);
br = new BufferedReader(fr);
while((line = br.readLine()) != null)
{
InstanceId = line.split(",");
CustId = line.split(",");
HostId = line.split(",");
instance.add(InstanceId[0]);
customer.add(CustId[1]);
host.add(HostId[2]);
}
}
catch(FileNotFoundException fN) {
fN.printStackTrace();
}
catch(IOException e) {
System.out.println(e);
}
getHostTxtData.setInstance(instance);
getHostTxtData.setCust(customer);
getHostTxtData.setHostInst(host);
System.out.println();
System.out.println("Instance File");
System.out.println("=============");
System.out.println("Instance: " + getHostTxtData.getIntstanceID());
System.out.println("Customer: " + getHostTxtData.getCustomer());
System.out.println("Host: " + getHostTxtData.getHostInst());
}
}
我的另一堂课：
package cloud;
import java.util.ArrayList;
public class CloudStructureData {
private ArrayList<String> sHostID;
private ArrayList<String> sSlot;
private ArrayList<String> sCentre;
private ArrayList<String> sInstanceID;
private ArrayList<String> sCust;
private ArrayList<String> sHostInst;
CloudStructureData(){
sHostID = new ArrayList<String>();
sSlot = new ArrayList<String>();
sCentre = new ArrayList<String>();
sInstanceID = new ArrayList<String>();
sCust = new ArrayList<String>();
sHostInst = new ArrayList<String>();
}
// Get Statements Host
public ArrayList<String> getHostID(){
return sHostID;
}
public ArrayList<String> getSlot(){
return sSlot;
}
public ArrayList<String> getCentre(){
return sCentre;
}
// Get Statements Instance
public ArrayList<String> getIntstanceID(){
return sInstanceID;
}
public ArrayList<String> getCustomer(){
return sCust;
}
public ArrayList<String> getHostInst(){
return sHostInst;
}
//Set Statements Host
public void setSlot(ArrayList<String> Slot){
sSlot = Slot;
}
public void setCentre(ArrayList<String> Centre){
sCentre = Centre;
}
public void setHostID(ArrayList<String> HostID) {
sHostID = HostID;
}
//Set Statements Instance
public void setInstance(ArrayList<String> InstanceID){
sInstanceID = InstanceID;
}
public void setCust(ArrayList<String> Cust){
sCust = Cust;
}
public void setHostInst(ArrayList<String> HostInst) {
sHostInst = HostInst;
}
}
这是我的程序的输出：
Host File
=============
Hosts: [2, 5, 7, 9, 3, 10, 6, 8]
Slots: [4, 4, 3, 3, 3, 2, 4, 2]
DataCentre: [0 , 0 , 0 , 1, 1, 2, 2, 2]
Instance File
=============
Instance: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
Customer: [8, 8, 8, 8, 15, 16, 13, 9, 13, 16, 15, 8, 16, 9, 9]
Host: [2, 2, 2, 7, 7, 9, 9, 3, 3, 5, 8, 6, 8, 9, 7]
HostState.txt输入列出了不同的主机及其位置。 InstanceState.txt输入列出正在运行的实例以及它们正在运行的主机。
答案 0 :(得分：0)
我建议你为Host创建一个类，为Instance创建一个类。 Instance类将引用Host对象。您还可以使用内置Map来帮助搜索主机和实例。以下是对代码的更改，以说明上述想法。虽然我不完全同意您的设计，但我尽量使用原始代码保持一致。 无论如何，下面的内容应该让您了解如何实现您的要求：
Host.java
package cloud;
public class Host {
private String hostId;
private String numberOfSlots;
private String dataCentre;
public Host(String hostId, String numberOfSlots, String dataCentre) {
this.hostId = hostId;
this.numberOfSlots = numberOfSlots;
this.dataCentre = dataCentre;
}
// valid getters and setters follow...
}
Instance.java
package cloud;
public class Instance {
private String instanceId;
private String customer;
private Host host; // this will be a reference to the related host object
public Instance(String instanceId, String customer, Host host) {
this.instanceId = instanceId;
this.customer = customer;
this.host = host;
}
// valid getters and setters follow...
}
CloudStructureData.java
package cloud;
import java.util.HashMap;
import java.util.Map;
public class CloudStructureData {
private Map<String, Host> hosts;
private Map<String, Instance> instances;
public CloudStructureData(){
hosts = new HashMap<String, Host>(); // the key will be HostId
instances = new HashMap<String, Instance>(); // the key will be InstanceId
}
public Map<String, Host> getHosts() {
return hosts;
}
public Map<String, Instance> getInstances() {
return instances;
}
}
CloudStructure.java
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Map;
import cloud.CloudStructureData;
import cloud.Host;
import cloud.Instance;
public class CloudStructure {
public static CloudStructureData readHost(String filePath)
{
String line = "";
CloudStructureData cloudData = new CloudStructureData();
FileReader fr;
BufferedReader br;
String[] HostID = null;
String[] Slots = null;
String[] DataCentre = null;
try {
fr = new FileReader(filePath);
br = new BufferedReader(fr);
while((line = br.readLine()) != null)
{
HostID = line.split(",");
Slots = line.split(",");
DataCentre = line.split(",");
Host host = new Host(HostID[0], Slots[1], DataCentre[2]);
cloudData.getHosts().put(HostID[0], host);
}
}
catch(FileNotFoundException fN) {
fN.printStackTrace();
}
catch(IOException e) {
System.out.println(e);
}
// output data the way you want...
return cloudData;
}
public static CloudStructureData readInstance(String filePath, CloudStructureData cloudData)
{
String line = "";
FileReader fr;
BufferedReader br;
String[] InstanceId = null;
String[] CustId = null;
String[] HostId = null;
try {
fr = new FileReader(filePath);
br = new BufferedReader(fr);
while((line = br.readLine()) != null)
{
InstanceId = line.split(",");
CustId = line.split(",");
HostId = line.split(",");
Host hostObject = cloudData.getHosts().get(HostId[2]); // Host object or null if not found
Instance instanceObject = new Instance(InstanceId[0], CustId[1], hostObject);
cloudData.getInstances().put(InstanceId[0], instanceObject);
}
}
catch(FileNotFoundException fN) {
fN.printStackTrace();
}
catch(IOException e) {
System.out.println(e);
}
// output instances the way you want
return cloudData;
}
public static void main(String[] args) {
CloudStructureData cloudData = readHost("C:\\tmp\\HostState.txt");
cloudData = readInstance("C:\\tmp\\InstanceState.txt", cloudData);
/*
* All Instances are now linked with Host.
* You can loop and do whatever you want.
*/
for (Map.Entry<String, Instance> currentEntry
: cloudData.getInstances().entrySet()) {
Instance currentInstance = currentEntry.getValue();
Host currentHost = currentInstance.getHost();
// Now you have the current instance and its related host...
}
}
}
这是你需要的吗？