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Utils.java
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128 lines (111 loc) · 2.69 KB
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package src.utils;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Random;
public class Utils {
public static int[] arr = {1,8,4,3,4,6,8,9,33,5,6,2,5,753};
public static <T> T[] swap(T t1, T t2){
return null;
}
/*
角标
*/
public static void swap(int[] arr,int t1, int t2){
int temp = arr[t2];
arr[t2] = arr[t1];
arr[t1] = temp;
}
/**
* 产生一个size大小的、数组分布范围为0-range的数组
* @param size
* @param range
* @return
*/
public static int[] createRandomArr(int size,int range,boolean hasFeed){
Random r;
if (hasFeed) {
r = new Random(100l);
}else{
r = new Random();
}
int[] arr = new int[size];
for(int j =0; j<size;j++){
arr[j] = r.nextInt(range);
}
return arr;
}
public static int[] createRandomArr(int size,int range){
return createRandomArr(size,range,false);
}
public static int[] createNearlyOrderArr(int size,int range,boolean flag){
int[] arr = new int[size];
for(int j =0; j<size;j++){
arr[j] = j;
}
return arr;
}
public static int[] createNearlyOrderArr(int size,int range){
return createNearlyOrderArr(size,range,false);
}
public static String printIntSZ(int[] i){
StringBuffer sb = new StringBuffer();
for (int j = 0; j < i.length; j++) {
sb.append(i[j]).append(",");
}
sb.delete(sb.lastIndexOf(","), sb.length());
return sb.toString();
}
//字符串写到文件中
public static void writeToFile(String filePath,String fileName,Object something){
if (!filePath.endsWith("/")) {
filePath = filePath+"/";
}
FileOutputStream out = null;
PrintWriter pw = null;
try {
File file = new File(filePath);
if (!file.exists() ||!file.isDirectory()) {
file.mkdirs();
}
File file2 = new File(filePath+fileName);
/* out = new FileOutputStream(file2);
out.write(something.getBytes());
System.out.println("写入成功："+filePath+fileName);*/
FileWriter fileWriter = new FileWriter(file2, true);
pw = new PrintWriter(fileWriter);
pw.println(something);
//pw.println("\n");
pw.flush();
} catch (Exception e) {
e.printStackTrace();
}finally{
if (out != null) {
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (pw != null) {
try {
pw.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
public static void main(String[] args) {
writeToFile("D:\\immoc.test", "sunfa.txt", "6666666666666");
}
public static int[] copyArr(int[] arr) {
int[] n = new int[arr.length];
for (int i = 0; i < arr.length; i++) {
n[i]=arr[i];
}
return n;
}
}