[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; yAel4b/}
} 0b,{4DOD
int i1=l; {`L,F
int i2=mid+1; !:g\Fe]
for(int cur=l;cur<=r;cur++){ 9B3}LVg\
if(i1==mid+1) *(*XNd||
data[cur]=temp[i2++]; E@="n<uS
else if(i2>r) (%M:=zm
data[cur]=temp[i1++]; 9 &Od7Cn
else if(temp[i1] data[cur]=temp[i1++]; k}{K7,DM
else n^epC>a"b
data[cur]=temp[i2++]; d k|X&)xTJ
} [vCZD8"Y8
} _j_c&
:Sk<0VVd7
} 1;MUemnx`
qRZLv7X*j
改进后的归并排序: y=}a55:qE
mO\=#Q>
package org.rut.util.algorithm.support; jin?;v
r3Ih]|FK#
import org.rut.util.algorithm.SortUtil; E|B1h!!\c
{y:+rh&
/** !{oP'8Ax$
* @author treeroot ou&7v<)x4
* @since 2006-2-2 kca Y
* @version 1.0 y {Mh ?H
*/ $4TawFf"nc
public class ImprovedMergeSort implements SortUtil.Sort { 2 BwpxV8
X@B,w_b
private static final int THRESHOLD = 10; @j4~`~8
eJ$ {`&J
/* /lvH p
* (non-Javadoc) UC9w T
* SRk-3:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X_I.f6v{
*/ #+P)X_i`
public void sort(int[] data) { zhde1JE
int[] temp=new int[data.length]; 4\8k~#
mergeSort(data,temp,0,data.length-1); -Ar 3>d
} nHL(v
7Rom#Kl:
private void mergeSort(int[] data, int[] temp, int l, int r) { _$4vk
int i, j, k; /E6Tt
int mid = (l + r) / 2; DfP vi1
if (l == r) +f?xVW<h
return; 3gmu-tv
if ((mid - l) >= THRESHOLD) ps?B;P
mergeSort(data, temp, l, mid); .gHL(*1P
else ;0\
insertSort(data, l, mid - l + 1); b;sjw5cm_
if ((r - mid) > THRESHOLD) v~HfA)#JK
mergeSort(data, temp, mid + 1, r); -U_<:
else YJrZ
insertSort(data, mid + 1, r - mid); X?.LA7)CK
FY]z*=
for (i = l; i <= mid; i++) { 1Xu^pc
temp = data; %(wa~:m+S-
} qdVExO&
for (j = 1; j <= r - mid; j++) { L~(`zO3f
temp[r - j + 1] = data[j + mid]; )u'("
} &+t,fwlM
int a = temp[l]; >@d=\Kyu
int b = temp[r]; *gzX=*;x+?
for (i = l, j = r, k = l; k <= r; k++) { 7":0CU%%
if (a < b) { 7J2i /m
data[k] = temp[i++]; g8w5X!Z
a = temp; b$)XS
} else { yq>3IS4O
data[k] = temp[j--]; MA:8gD
b = temp[j]; +#y[sKa
} E>?T<!r~j
} Tp/+{|~
} )zVD!eG_9
tpi63<N
/** "n@=.x
* @param data iPJZ%
* @param l 8[;U|SR"
* @param i -xf=dzm)
*/ G%K<YyAP
private void insertSort(int[] data, int start, int len) { } Pc6_#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &wZ:$lK#o
} '4qi^$|\
} ~?{@0,$
} dKyX70Zy9
} e]{X62]
aKC3T-
堆排序： b9([)8
S\jN:o#b
package org.rut.util.algorithm.support; scUWI"
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import org.rut.util.algorithm.SortUtil; "U&
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/** x_\e&"x
* @author treeroot @[S\ FjI
* @since 2006-2-2 %-:6#bz
* @version 1.0 8P'>%G<m
*/ Piz/vH6M}
public class HeapSort implements SortUtil.Sort{ d+fig{<b
_D(F[p|
/* (non-Javadoc) iffRGnN^e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "ND 7,rQ
*/ p_QL{gn
public void sort(int[] data) { DY{JA *N
MaxHeap h=new MaxHeap(); @&2bLJJ+
h.init(data); j=d@Ih*
for(int i=0;i h.remove(); 3&-BO%i
System.arraycopy(h.queue,1,data,0,data.length); p9 |r y+t
} Rj%q)aw'
}o?@
private static class MaxHeap{ DP*[t8
8\t~*@"
void init(int[] data){ mY3x (#I
this.queue=new int[data.length+1]; m`-{ V<(M
for(int i=0;i queue[++size]=data; H6*d#!
fixUp(size); $3%EKi
} I/MYS5}
} Zl.}J,0F
/'}O-h
private int size=0; )fR'1_
O&irgc!
private int[] queue; %Ow,.+m
1NT@}j~/
public int get() { z/N~HSh!d
return queue[1]; <$HP"f+<S5
} /'p(X~X:l
'LR5s[$j
public void remove() { }dE0WJcO
SortUtil.swap(queue,1,size--); FbHk6(/)
fixDown(1); UMw1&"0:
} ? S>"yAoe
file://fixdown %Sfew/"R0
private void fixDown(int k) { hHdH#-O:4"
int j; <D pi M`
while ((j = k << 1) <= size) { qV.*sdS>
if (j < size %26amp;%26amp; queue[j] j++; +X0?bVT
if (queue[k]>queue[j]) file://不用交换 i}+K;,Da:8
break; sL XQ)Ce
SortUtil.swap(queue,j,k); 4jj@"*^a
k = j; k|nv[xY0
} c ++tk4
} do%6P^qA
private void fixUp(int k) { 2|Hq[c=~
while (k > 1) { RpR;1ktF>
int j = k >> 1; QkwBw^'_5
if (queue[j]>queue[k]) ED @9,W0
break; Dw?nf
SortUtil.swap(queue,j,k); 7 rOziKZ"
k = j; <`b)56v:+
} U*=ebZno
} uG2Hzav
J(VJMS;_
} c:4M|t=
*K'(t
} soXeHjNl
x\GCsVy
SortUtil： f 6Bx>lh
InMF$pw
package org.rut.util.algorithm; +hRAU@RA
*obBo6!zM
import org.rut.util.algorithm.support.BubbleSort; gyJ$Jp
import org.rut.util.algorithm.support.HeapSort; !iA0u
import org.rut.util.algorithm.support.ImprovedMergeSort; Q\Fgc ;.U
import org.rut.util.algorithm.support.ImprovedQuickSort; \;}F6g
import org.rut.util.algorithm.support.InsertSort; )&<BQIv9/
import org.rut.util.algorithm.support.MergeSort; me#VCkr#
import org.rut.util.algorithm.support.QuickSort; kf>oZ*/
import org.rut.util.algorithm.support.SelectionSort; a8FC#kfq
import org.rut.util.algorithm.support.ShellSort; xf?*fm?m
Y'`w.+9
/** ne4hR]:
* @author treeroot _K3?0<=4
* @since 2006-2-2 S v$%-x^t
* @version 1.0 *f=H#
*/ a1_7plg
public class SortUtil { OW\r }
public final static int INSERT = 1; gh|TlvnA
public final static int BUBBLE = 2; m@R!o
public final static int SELECTION = 3; )Y+n4UL3NK
public final static int SHELL = 4; X<m#:0iD
public final static int QUICK = 5; [*Nuw_l
public final static int IMPROVED_QUICK = 6; VChNDHiH
public final static int MERGE = 7; +;tXk
public final static int IMPROVED_MERGE = 8; U@!e&QPn
public final static int HEAP = 9; +LCpE$H
F??})YX
public static void sort(int[] data) { o nt8q8
sort(data, IMPROVED_QUICK); D$+9`
} T$)&8"Xya
private static String[] name={ +6-c<m|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nxkbI:+t
}; H[UV]qO,
-uXf?sTV
private static Sort[] impl=new Sort[]{ (;;%B=
new InsertSort(), *Fb]lM7D
new BubbleSort(), +hI:5(_
new SelectionSort(), Va"Q1 *"
new ShellSort(), fgK1+sW
new QuickSort(), Pk!RgoWF
new ImprovedQuickSort(), Tz[ck'k
new MergeSort(), [QEV6S]
new ImprovedMergeSort(), \wEHYz
new HeapSort() w5w,jD[
}; OOn{Wp
t<wjS|4
public static String toString(int algorithm){ (-viP
return name[algorithm-1]; W+d=BnOa8
} U1}-]^\
+Kw:z?
public static void sort(int[] data, int algorithm) { ?55t0
impl[algorithm-1].sort(data); :sAb'6u1EU
} gQMcQV]C$
1t wC-rC
public static interface Sort { Jd?N5.
public void sort(int[] data); kVR_?ch{
} k!l\|~
tBC`(7E}
public static void swap(int[] data, int i, int j) { v1h\ 6r'
int temp = data; r==d^
data = data[j]; IcRA[ g
data[j] = temp; d$qivct
} f]%:.N~1w
} 5]pvHc