[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; ,f: jioY
} ]#<
int i1=l; J fcMca
int i2=mid+1; T`$KeuL
for(int cur=l;cur<=r;cur++){ v\ZBv zd
if(i1==mid+1) p-GT`D
data[cur]=temp[i2++]; rdj@u47
else if(i2>r) %B EC] h
data[cur]=temp[i1++]; ][Y^-Ak1
else if(temp[i1] data[cur]=temp[i1++]; ke/_k/
else W'_/6_c$!
data[cur]=temp[i2++]; r@T| e
} EaS~`
} f|xLKcOP
=hw^P%Zn
} 9u wL{P&
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改进后的归并排序: SZVV40w
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package org.rut.util.algorithm.support; }sMW3'V
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import org.rut.util.algorithm.SortUtil; rbk<z\pc
!Y;<:zx5
/** )-&nxOP
* @author treeroot >,h1N$A+
* @since 2006-2-2 SNvb1&
* @version 1.0 =LZ>su
*/ 2/tb6' =
public class ImprovedMergeSort implements SortUtil.Sort { ,VD6s!(
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private static final int THRESHOLD = 10; 2ALj}
p q-!WQ
/* lSc,AOXp
* (non-Javadoc) |l90g|isJ
* Sa]mm/G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &]nd!N
*/ 6MrKi|'X@
public void sort(int[] data) { |}qjqtZ
int[] temp=new int[data.length]; E_[ONm=,
mergeSort(data,temp,0,data.length-1); R@r{
} g'G8 3F
r`]7S_t5T
private void mergeSort(int[] data, int[] temp, int l, int r) { XUsy.l/
int i, j, k; ~eo^`4O{{
int mid = (l + r) / 2; @ t@|q
if (l == r) ZBj6KqfST%
return; Js}tZ\+P75
if ((mid - l) >= THRESHOLD) 0|2%# E
mergeSort(data, temp, l, mid); J1-):3A
else PN\V[#nS
insertSort(data, l, mid - l + 1); \:sk9k
if ((r - mid) > THRESHOLD) ?@a$!_
mergeSort(data, temp, mid + 1, r); {v+a!#{c7
else ^\YQ_/\~L
insertSort(data, mid + 1, r - mid); ~t9$IB
P,1exgq9
for (i = l; i <= mid; i++) { o5#,\Y[ g
temp = data; 9kd.j@C
} ChIoR:y>
for (j = 1; j <= r - mid; j++) { e<'U8|}hc{
temp[r - j + 1] = data[j + mid]; *?Wtj
} }'jV/
int a = temp[l]; Kcn\g.
int b = temp[r]; EW5]!%
for (i = l, j = r, k = l; k <= r; k++) { v,\93mNp[
if (a < b) { SY6r 8RK
data[k] = temp[i++]; J%4HNW*p
a = temp; 70<K.T<b
} else { /s-d?
data[k] = temp[j--]; luF#OPC
b = temp[j]; $f(agG]
} G4yUC<TqBP
} 5TET<f6R
} &V;x 4
sUda
/** B_@7IbB
* @param data 6ZHv,e`?
* @param l |Y4q+sDW
* @param i dKe@JQ+-z
*/ x=3I)}J(kn
private void insertSort(int[] data, int start, int len) { u.&|CF-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NlFo$Y
} a&:>Ped"
} rHo6iJj
} 9<qx!-s2rr
} ZX]A )5G
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堆排序： tnRJ#[Io
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package org.rut.util.algorithm.support; tz8t9lb[
Ey= 4 b
import org.rut.util.algorithm.SortUtil; 8a!2zwUBV
tAt;bYjb\
/** Eb7}$Ji\
* @author treeroot d:3= 1x
* @since 2006-2-2 .ftUhg
* @version 1.0 A xR\ned
*/ &u4Ve8#
public class HeapSort implements SortUtil.Sort{ }JJ::*W2n
DzmqR0)
/* (non-Javadoc) 9>zDJx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8"pA9Mr
*/ "{6KZ!+0
public void sort(int[] data) { +TWJNI
MaxHeap h=new MaxHeap(); 5YLho2h38!
h.init(data); 5z[6rT=a
for(int i=0;i h.remove(); 7\ZL
System.arraycopy(h.queue,1,data,0,data.length); .n=xbx:=
} ~{Ua92zV9
(77Dif0)'
private static class MaxHeap{ X?_v+'G
P ]_Vz
void init(int[] data){ mlmnkgl ]
this.queue=new int[data.length+1]; X{|k<^:
for(int i=0;i queue[++size]=data; SFOQM*H
fixUp(size); x6~Fb~aP
} kz|[*%10
} t3M0La&
KD9Ca $-
private int size=0; td`wNy\
cG5$lB
private int[] queue; ]:Wb1
R=QM;
public int get() { 0YHYxn
return queue[1]; 3dY6;/s
} p\)h",RkA
rcpvH}N:
public void remove() { 6.vNe
SortUtil.swap(queue,1,size--); r6<ArX$Yl
fixDown(1); DvU~%%(0^
} 2voNgY
file://fixdown Z^C!RSQ
private void fixDown(int k) { cRPr9LfD@
int j; <,#rtVO$
while ((j = k << 1) <= size) { 5@""_n&FV
if (j < size %26amp;%26amp; queue[j] j++; d?E4[7<t$1
if (queue[k]>queue[j]) file://不用交换 EywZIw?mjX
break; rHR5,N:
SortUtil.swap(queue,j,k); EsS!07fAM:
k = j; rjt O`Mt`
} Y}*Ctdrl
} M~#5/eRX
private void fixUp(int k) { x%ZiE5#
while (k > 1) { `~sf}S :
int j = k >> 1; KF*B
if (queue[j]>queue[k]) d9ZDpzxB
break; 7=AO^:=bx
SortUtil.swap(queue,j,k); C[^a/P`i
k = j; <`^>bv9
} )vxVg*.Ee
} 30e(4@!4vW
vBV"i9n
} mq>*W'M
6k@[O@)
} YL_!#<k@
5Xla_@WLW
SortUtil： oM m/!Dc
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package org.rut.util.algorithm; Ebmqq#SHjX
InTKdr^ P
import org.rut.util.algorithm.support.BubbleSort; 6S` ,j
import org.rut.util.algorithm.support.HeapSort; R?i-"JhW
import org.rut.util.algorithm.support.ImprovedMergeSort; bkJn}Al;
import org.rut.util.algorithm.support.ImprovedQuickSort; =r=^bNO
import org.rut.util.algorithm.support.InsertSort; hnlU,p&y3
import org.rut.util.algorithm.support.MergeSort; "Vs Nyy
import org.rut.util.algorithm.support.QuickSort; |J@|
import org.rut.util.algorithm.support.SelectionSort; )3d:S*ly
import org.rut.util.algorithm.support.ShellSort; _AA`R`p;
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/** c'>8pd
* @author treeroot 0^_)OsFA
* @since 2006-2-2 a .B\=3xn
* @version 1.0 PLlx~A
*/ #nt<j2}m
public class SortUtil { <L[ *hp
public final static int INSERT = 1; ZzwZ,(
public final static int BUBBLE = 2; m|g$'vjk
public final static int SELECTION = 3; %DHP
public final static int SHELL = 4; $Ykp8u,(
public final static int QUICK = 5; 4p0IBfVG
public final static int IMPROVED_QUICK = 6; xX[{E x
public final static int MERGE = 7; V_ avaE
public final static int IMPROVED_MERGE = 8; C:TuC5Sr
public final static int HEAP = 9; xNkwTDN5
u:p:*u_^I
public static void sort(int[] data) { +Uc&%Px
sort(data, IMPROVED_QUICK); \ltErd-
} L.R\]+$U2
private static String[] name={ k,o=1I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6-Vl#Lyb
}; Ra*k
INeWi=1
private static Sort[] impl=new Sort[]{ 4l#T_y
new InsertSort(), SvCK;$:
new BubbleSort(), w2RESpi
new SelectionSort(), 9^=t@
new ShellSort(), gGceK^#
new QuickSort(), 1yY'hb,0
new ImprovedQuickSort(), jtlDSf#
new MergeSort(), Z\oAE<$
new ImprovedMergeSort(), J/H#d')c
new HeapSort() co(fGp#!
}; r[i~4N=
V9);kD
public static String toString(int algorithm){ rA&#>R`
return name[algorithm-1]; kKI!B`j=
} 6='_+{
z;Gbqr?{{
public static void sort(int[] data, int algorithm) { 7m@^=w
impl[algorithm-1].sort(data); Z"PDOwj5
} |M0,%~Kt
h)aWerzL
public static interface Sort { OQX{<pQ6
public void sort(int[] data); 9#.NPfMF
} eo}S01bt
^me}k{x
public static void swap(int[] data, int i, int j) { OM#OPB rB
int temp = data; !ktA"Jx
data = data[j]; UO7a}Tz<
data[j] = temp; Iu)(Huv
} 2e D\_IW
} S{r)/~/