[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; 13aj fH
} =berCV
int i1=l; {?RVw`g&f
int i2=mid+1; %U?1Gf e
for(int cur=l;cur<=r;cur++){ <! Z06
if(i1==mid+1) B&rw R/d
data[cur]=temp[i2++]; jxqKPMf>@%
else if(i2>r) 11YpC;[o
data[cur]=temp[i1++]; d}^G790
else if(temp[i1] data[cur]=temp[i1++]; h/pm$9A
else %4,v2K
data[cur]=temp[i2++]; GV0-"9uwX~
} N%Uk/ c'
} ]114\JE
rsn^YC
} +x]3 -s
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改进后的归并排序: 0Zh]n;S3m
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package org.rut.util.algorithm.support; 4A)@,t9+
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import org.rut.util.algorithm.SortUtil; /i)>|U 4
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/** 2(AuhZ>
* @author treeroot G\(cnqHk
* @since 2006-2-2 Xv<K>i>k
* @version 1.0 ib-H jJ8
*/ VT [TE
public class ImprovedMergeSort implements SortUtil.Sort { H>]A|-rG#
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private static final int THRESHOLD = 10; mqK}yK^P]
YY4q99^K
/* 8Z!Mad
* (non-Javadoc) p(!d,YSE
* Q 6n!u;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5m2f\^U
*/ } 89-U
public void sort(int[] data) { Zo<j"FG
int[] temp=new int[data.length]; Ay0.D FL
mergeSort(data,temp,0,data.length-1); ^X;p8uBo
} [H@71+_Q
TPVB{ 107
private void mergeSort(int[] data, int[] temp, int l, int r) { 5x"eM=
int i, j, k; ckYT69U
int mid = (l + r) / 2; E NrcIZ
if (l == r) VWK%6Ye0
return; ?$#P =VK
if ((mid - l) >= THRESHOLD) d:pGdr& .
mergeSort(data, temp, l, mid); m5v IS
else $!$,cKPl5
insertSort(data, l, mid - l + 1); e}+Zj'5
if ((r - mid) > THRESHOLD) ]0XlI;ah
mergeSort(data, temp, mid + 1, r); r+k g$+%b
else jG{OLF6 !
insertSort(data, mid + 1, r - mid); :(iBLO<x
2ck0k,WP
for (i = l; i <= mid; i++) { 20# V?hX3
temp = data; 55FRPNx-x
} SBI*[
for (j = 1; j <= r - mid; j++) { x\oSD1t,
temp[r - j + 1] = data[j + mid]; Zs4NN2~
} On|b-
int a = temp[l]; oFGWI#]ts>
int b = temp[r]; G6dUm_iB
for (i = l, j = r, k = l; k <= r; k++) { qOy0QZ#0
if (a < b) { oL~?^`cGZ
data[k] = temp[i++]; XZ@|(_Z
a = temp; f]_'icP
} else { Y]tbwOle
data[k] = temp[j--]; KP&xk13)
b = temp[j]; >}:
} FGzKx9I9
} mV^~
} g^^pPVK_
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/** 4xH/a1&p=
* @param data *%Fu/
* @param l _N=f&~T
* @param i 6bPl(.(3
*/ |Sm/s;&c6
private void insertSort(int[] data, int start, int len) { )N*Jc @Y@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :yRv:`r3Lt
} D*j^f7ab
} skBD2V4
} tcO{CI
} k<5g
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堆排序： i4]oE&G
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package org.rut.util.algorithm.support; XMiu}w!
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import org.rut.util.algorithm.SortUtil; Rw|'LaW
S8Y\@C?5
/** gq"d$Xh$x7
* @author treeroot :.r_4$F:
* @since 2006-2-2 /M+Du,
* @version 1.0 !?v_.
*/ 9?8PMh.
public class HeapSort implements SortUtil.Sort{ Mc<u?H
=#v? }JG
/* (non-Javadoc) ![sXR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *yaS^k\
*/ zh|9\lf
public void sort(int[] data) { DzQ
MaxHeap h=new MaxHeap(); XbqMWQN*
h.init(data); tc<uS%XT4^
for(int i=0;i h.remove(); "VZXi_P
System.arraycopy(h.queue,1,data,0,data.length); 4l+!Z,b
} Pc_aEBq
p[(I5p:L
private static class MaxHeap{ _'LZf=V0
! 5NuFLOf
void init(int[] data){ =E5bM_P<K
this.queue=new int[data.length+1]; i'7+ ?YL
for(int i=0;i queue[++size]=data; 2ozh!8aL
fixUp(size); Ps74SoD-
} W*t] d
} ;4[[T%&v
fEX=csZ86
private int size=0; l6y}>]
z -!w/Bv@
private int[] queue; 3f] ;y<Km
^J5{quV
public int get() { iN[x *A|h
return queue[1]; !R"W2Z4h
} $[A\i<#
mAtqF %V
public void remove() { DK\XC%~m
SortUtil.swap(queue,1,size--); y=Kqv^
fixDown(1); Z*ip=FYR
} pA6KiY&
file://fixdown Y @p<f5[c
private void fixDown(int k) { MQQm3VaKS
int j; mK[Z#obc=
while ((j = k << 1) <= size) { m{/( 3
if (j < size %26amp;%26amp; queue[j] j++; ch8a
if (queue[k]>queue[j]) file://不用交换 G{3|d/;Bt
break; G aV&y
SortUtil.swap(queue,j,k); ;:fW]5"R
k = j; S^eem_C
} }/F$73Xd
} n^Ca?|} ,
private void fixUp(int k) { UX@%1W!8
while (k > 1) { #wI}93E
int j = k >> 1; D\AVZ76F1
if (queue[j]>queue[k]) "XR=P> xk
break; ;!MQ@Fi^
SortUtil.swap(queue,j,k); _&uJE&xl}
k = j; +;?mg(:
} K*SgEkb'l
} mGjB{Q+
:A8}x=K
} 5#,H&ui\
*nCA6i
} >fH0>W+!
p~ b4TRvA6
SortUtil： {^WK#$]
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package org.rut.util.algorithm; _MBhwNBxZ
h2ROQKL"B
import org.rut.util.algorithm.support.BubbleSort; Q":_\inF
import org.rut.util.algorithm.support.HeapSort; R2,9%!iiX
import org.rut.util.algorithm.support.ImprovedMergeSort; )`DVPudiy
import org.rut.util.algorithm.support.ImprovedQuickSort; T/_u;My;
import org.rut.util.algorithm.support.InsertSort; 7q?ZieR
import org.rut.util.algorithm.support.MergeSort; Vu:ZG*^
import org.rut.util.algorithm.support.QuickSort; c/|{yp$Ga>
import org.rut.util.algorithm.support.SelectionSort; x>yqEdR=o
import org.rut.util.algorithm.support.ShellSort; g8<ODU0[g
~#r>@C
/** Qr.{_M
* @author treeroot (Q*q#U
* @since 2006-2-2 Ew/MSl6}
* @version 1.0 y, l[v39
*/ ;6G]~}>o
public class SortUtil { #a e@VedM
public final static int INSERT = 1; @t%da^-HS"
public final static int BUBBLE = 2; /5NWV#-
public final static int SELECTION = 3; \p4*Q}t
public final static int SHELL = 4; Dvg'
public final static int QUICK = 5; Kxsd@^E
public final static int IMPROVED_QUICK = 6; T3wTMbZ!VK
public final static int MERGE = 7; )Te\6qM
public final static int IMPROVED_MERGE = 8; =XfvPBA
public final static int HEAP = 9; 9xQ|Uad+%
D!`[fjs6A
public static void sort(int[] data) { E`)e ;^
sort(data, IMPROVED_QUICK); Xf4QLw/r
} +^AdD8U
private static String[] name={ LIDi0jbrq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $u<;X^
}; v;(cJ,l
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private static Sort[] impl=new Sort[]{ 8-;.Ejz!\A
new InsertSort(), ;]LQ}^MP(
new BubbleSort(), `wi+/^);
new SelectionSort(), 6()Jx%
new ShellSort(), zA#pgX[#
new QuickSort(), D <iG*I
new ImprovedQuickSort(), C. .|O
new MergeSort(), Es[3Ppz
new ImprovedMergeSort(), D1RQkAZS
new HeapSort() !XTzsN
}; upMs yLp(
>)4~,-;k
public static String toString(int algorithm){ b'O/u."O
return name[algorithm-1]; nAQ[ -NbW,
} fHaF9o+/b
#'/rFT4{v
public static void sort(int[] data, int algorithm) { ,zjz "7'
impl[algorithm-1].sort(data); ndQw>
} pW[TufTa
\(??Ytc<B
public static interface Sort { 5%TSUU+<I
public void sort(int[] data); (\qf>l+*
} `C4(C4u
gPn0-)<
public static void swap(int[] data, int i, int j) { X}GX6qAdt
int temp = data; >_Tyzl>z
data = data[j]; 56Lxr{+X
data[j] = temp; B}7j20:Z
} xZ'C(~t
} oyiG04H&