[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; RNcHU
} Wxb/|?,
int i1=l; .cQwjL
int i2=mid+1; s=~r. x
for(int cur=l;cur<=r;cur++){ wjoxfPnf
if(i1==mid+1) rxIfatp^
data[cur]=temp[i2++]; m$*dPje
else if(i2>r) KSqWq:W+
data[cur]=temp[i1++]; /JtKn*?}:>
else if(temp[i1] data[cur]=temp[i1++]; /0!6;PC<
else ~7 C` a$
data[cur]=temp[i2++]; +MGEO+
} 6jRF[N8
} q,^^c1f
$?(fiFC
} tE9%;8;H
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改进后的归并排序: Ca*^U-
FX+Ra@I!
package org.rut.util.algorithm.support; fE|([` !
Y=x]'3}^
import org.rut.util.algorithm.SortUtil; $a(wM1S4
+<"sC+2
/** hCc_+/j|
* @author treeroot C*/d%eHD
* @since 2006-2-2 1 BAnf9
* @version 1.0 xx#;)]WT
*/ X[(u]h`
public class ImprovedMergeSort implements SortUtil.Sort { 1$q SbQ
ds4ERe /
private static final int THRESHOLD = 10; iU~oPp[e
Zc{at}{
/* {O]Cj~}
* (non-Javadoc) zo7Hm]W`
* L@ql)Lc);
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H--(zxK
*/ ,-vbR&
public void sort(int[] data) { ZxwI< T:&
int[] temp=new int[data.length]; &`Z>zT}
mergeSort(data,temp,0,data.length-1); w6qx
} 4@4$kro
2Af1-z^^K
private void mergeSort(int[] data, int[] temp, int l, int r) { -$QzbRF5R
int i, j, k; ?r'rvu'/
int mid = (l + r) / 2; R}#?A%,*
if (l == r) 3(}W=oI
return; `(q+@#)
if ((mid - l) >= THRESHOLD) wZ0$ylEX
mergeSort(data, temp, l, mid); #:v|/2
else (m|p|rL
insertSort(data, l, mid - l + 1); "/(J*)%{
if ((r - mid) > THRESHOLD) |/Ggsfmby
mergeSort(data, temp, mid + 1, r); (VI4kRj
else *A@~!@XE4
insertSort(data, mid + 1, r - mid); }{n[_:[7
<JuP+\JAm
for (i = l; i <= mid; i++) { ,l_"%xYx
temp = data; nkG1&wiX
} ) 'j7Ra
for (j = 1; j <= r - mid; j++) { Z7V1e<E
temp[r - j + 1] = data[j + mid]; >j4;{r+eQw
} ^{DXin 1O`
int a = temp[l]; Ev,>_1#Xm
int b = temp[r]; x<>#G~-
for (i = l, j = r, k = l; k <= r; k++) { %|I~8>m
if (a < b) { >KNiMW^V
data[k] = temp[i++]; }:])1!a
a = temp; z|Q)^
} else { 5*/~) wN\U
data[k] = temp[j--]; rUc2'Ct
b = temp[j]; P6!c-\
} N<zD<q
} FMc$?mm
} Tv_KdOv8
1aP3oXLL
/** % r`hW\4{
* @param data <~X4&E]rT_
* @param l tda#9i[pkH
* @param i ve49m%NQ
*/ :XC~G&HuF6
private void insertSort(int[] data, int start, int len) { *39Y1+=)$$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3+%a
} S1p4.qJ
} [_Fj2nb*
} <U%4$83$
} 8oK*NB29
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堆排序： j^;f {0f
oCg|* c|+
package org.rut.util.algorithm.support; JfGU3d*c
-GJ~xcf0
import org.rut.util.algorithm.SortUtil; ~2PD%+e7]
s;Q0
/** `|)V]<
* @author treeroot RZoSP(6
* @since 2006-2-2 aZn]8jC%
* @version 1.0 K~$A2b95
*/ hfE5[
public class HeapSort implements SortUtil.Sort{ 8s16yuM
BpBMFEiP
/* (non-Javadoc) ~_6~Fi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cc- liY"
*/ />Kd w
public void sort(int[] data) { 6hp>w{+
MaxHeap h=new MaxHeap(); O_OgTa
h.init(data); p{X?_F
for(int i=0;i h.remove(); # 2;6!_
System.arraycopy(h.queue,1,data,0,data.length); )lg>'O
} +txFdc
2n+tc
private static class MaxHeap{ UR?biq
QiC}hj$
void init(int[] data){ ]s_,;PGU
this.queue=new int[data.length+1]; iga.B
for(int i=0;i queue[++size]=data; ~ES6Qw`Oe
fixUp(size); ywQ[>itMa
} S9RH&/^H
} yhm6%
znnnqR0us
private int size=0; 0h/bC)z
=\~<##sRJ
private int[] queue; u#!QIQW
tf[)Q:|
public int get() { a;bmZh
return queue[1]; ZDny=&>#
} K93L-K^J
%4'<0
public void remove() { eFKF9m
SortUtil.swap(queue,1,size--); ;$,b w5
fixDown(1); n=Ze p{^
} JOwm|%>3a
file://fixdown D[/h7Ha
private void fixDown(int k) { X'FDQoH
int j; ,/2&HZd
while ((j = k << 1) <= size) { 9`y@2/!Y
if (j < size %26amp;%26amp; queue[j] j++; v}\4/u
if (queue[k]>queue[j]) file://不用交换 3qf?n5"8
break; 41uiW,
SortUtil.swap(queue,j,k); K}|zKTh:?
k = j; ES,T[
} w3Lr~_j
} {,aX|*1Ku~
private void fixUp(int k) { ~(*2:9*0
while (k > 1) { \MqOHM.[
int j = k >> 1; Jlp nR#@
if (queue[j]>queue[k]) Sf*1Z~P|
break; V#X#rDfJZ
SortUtil.swap(queue,j,k); .n[;H;
k = j; bT>MZK8b
} aAKwC01?
} 6|uv+$
6}l[%8
} s!<RWy+
z@I'Ryalyc
} tNoPpIu
CiWz>HWH
SortUtil： 9*Q6/?v
%(&$CmS@
package org.rut.util.algorithm; OEw#;l4 C
{ty)2
import org.rut.util.algorithm.support.BubbleSort; y>^FKN/
import org.rut.util.algorithm.support.HeapSort; 8Sxk[`qx\K
import org.rut.util.algorithm.support.ImprovedMergeSort; bT7+$^NHf
import org.rut.util.algorithm.support.ImprovedQuickSort; 36e
import org.rut.util.algorithm.support.InsertSort; r[g
import org.rut.util.algorithm.support.MergeSort; xO[V>Ud
import org.rut.util.algorithm.support.QuickSort; T<oDLJA\
import org.rut.util.algorithm.support.SelectionSort; S-'R84M,F
import org.rut.util.algorithm.support.ShellSort; &NKb},~
=U7P\sw2
/** %u}#|+8}
* @author treeroot -*A1[Z ?
* @since 2006-2-2 -w"$[XP
* @version 1.0 4mjlat(d
*/ UpaF>,kM
public class SortUtil { 71n3d~!O>
public final static int INSERT = 1; kx?f,^-
public final static int BUBBLE = 2; 12VIP-ABK
public final static int SELECTION = 3; r=-b@U.fk>
public final static int SHELL = 4; Ptm=c6H('
public final static int QUICK = 5; iD*21c<kd
public final static int IMPROVED_QUICK = 6; .(RZ&*4
public final static int MERGE = 7; .0YcB
public final static int IMPROVED_MERGE = 8; H-rxn
public final static int HEAP = 9; 3{)!T;Wd
OUq%d8W
public static void sort(int[] data) { A(_HMqA]
sort(data, IMPROVED_QUICK); nz|6CP
} e@Mg9VwDc
private static String[] name={ Yt[LIn-v:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cO$xT;kK
}; |k$6"dXSO
P!Brw72
private static Sort[] impl=new Sort[]{ Q5c3C&$6
new InsertSort(), /!?b&N/d)
new BubbleSort(), EHy15RL
new SelectionSort(), r]@T9\9
new ShellSort(), !(Ymc_s
new QuickSort(), IR:GoD+
new ImprovedQuickSort(), 7Kf
new MergeSort(), jW]"Um-]
new ImprovedMergeSort(), >AFQm
new HeapSort() <Drm#2x!E
}; yg.o?eML
~&?57Sw*m
public static String toString(int algorithm){ X J`*dgJ
return name[algorithm-1]; Xdi<V_!BC-
} $l2`@ia"
9a[1s|>w-
public static void sort(int[] data, int algorithm) { 0W0GSDx
impl[algorithm-1].sort(data); 3! #|hI>f
} ;A4qE W
|a#=o}R_
public static interface Sort { P3.
public void sort(int[] data); o}DRp4;Ka
} ClY`2
Iprt ZqiL
public static void swap(int[] data, int i, int j) { T+^Sa J
int temp = data; ic5af"/(\
data = data[j]; v%$l(
data[j] = temp; ht*N[Pi4;
} ,m[XeI
} &?@[bD'T