[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; dPtQ Sa
} nbhzLUK
int i1=l; RhPEda2
int i2=mid+1; (X(296<;
for(int cur=l;cur<=r;cur++){ TlA*~HG<Q
if(i1==mid+1) i=ztWKwKf
data[cur]=temp[i2++]; _Cd_i[K[
else if(i2>r) 3SU:Xd(\o
data[cur]=temp[i1++]; <.N337!
else if(temp[i1] data[cur]=temp[i1++]; *GMs>"C
else O6Gg?j
data[cur]=temp[i2++]; H)Kt!v8
} |fd}B5!c
} 4YmN3i
.0eHP
} 49;2tl;F
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改进后的归并排序: I {o\d'/
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package org.rut.util.algorithm.support; Mb2rHUr
vA(')"DDT
import org.rut.util.algorithm.SortUtil; Du*O|
] SErM#$*
/** R\+O.vX
* @author treeroot 5ZPe=SQ{
* @since 2006-2-2 u{/!BCKE
* @version 1.0 [p%OIqC`pB
*/ UhX`BGpM{
public class ImprovedMergeSort implements SortUtil.Sort { yU"'h[^
+EnJyli
private static final int THRESHOLD = 10; 3XeCaq'N
6kc/
/* f7Dx.-
* (non-Javadoc) LhM{d
* ,iUYsY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lYz$~/sd
*/ OcBn1k.
public void sort(int[] data) { z+J4XpX0,
int[] temp=new int[data.length]; sT^^#$ub
mergeSort(data,temp,0,data.length-1); -i}@o1o\
} 1Xv- e8M
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private void mergeSort(int[] data, int[] temp, int l, int r) { L'>t:^QTh
int i, j, k; cE*Gd^
int mid = (l + r) / 2; 3j2% '$>E^
if (l == r) kdWk{ZT^
return; 05<MsxB"w
if ((mid - l) >= THRESHOLD) #hBDOXHPf
mergeSort(data, temp, l, mid); fRTQ5V
else Ve4!MM@ti
insertSort(data, l, mid - l + 1); }tIIA"dZ
if ((r - mid) > THRESHOLD) 7@.UkBOx
mergeSort(data, temp, mid + 1, r); Mb I';Mq
else ijYSYX@
insertSort(data, mid + 1, r - mid); wHQyMq^
FafOd9>AO
for (i = l; i <= mid; i++) { ~D4%7U"dv
temp = data; :EK.&%2
} mn=G6h T}W
for (j = 1; j <= r - mid; j++) { ]hBp elKJ
temp[r - j + 1] = data[j + mid]; crJyk#_
} BO b#9r
int a = temp[l]; a9ab>2G?FR
int b = temp[r]; `]^JOw5o
for (i = l, j = r, k = l; k <= r; k++) { o0>z6Ya<
if (a < b) { e1dT~l
data[k] = temp[i++]; ,qgph^C
a = temp; ,$,6%"'"
} else { 1)aB']K%
data[k] = temp[j--]; 9:bC{n
b = temp[j]; nQc]f*
} C?bq7kD:H
} 05zBB
} ,y[wS5li
Q'] _3
/** TR8<=
* @param data JDi|]JY
* @param l 2$^n@<uZ@
* @param i _MfB,CS
*/ 'AX/?Srd
private void insertSort(int[] data, int start, int len) { ,C88%k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uL^Qtmm>M
} Y!LcS48X
} 3_W1)vd{
} yz}Agc4.I
} ZqQJFyV*
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堆排序： 0/d+26lR
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package org.rut.util.algorithm.support; }vkrWy^
YFD'&N,sx
import org.rut.util.algorithm.SortUtil; /sf:.TpVh
+(iM]L$Fw%
/** s+>VqyHgf
* @author treeroot , ;L
* @since 2006-2-2 MP\$_;&xB
* @version 1.0 jN:!V t
*/ &Avd
public class HeapSort implements SortUtil.Sort{ <o^_il$W
Y,OSQBgk
/* (non-Javadoc) 9^Q:l0|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cg$@x\fJ
*/ PR=:3-#R
public void sort(int[] data) { %j%}iM/(<
MaxHeap h=new MaxHeap(); /238pg~Cw5
h.init(data); RwMK%^b
for(int i=0;i h.remove(); [6Y6{.%~
System.arraycopy(h.queue,1,data,0,data.length); :B?XNo
} FN5*pVD;<
<>`+"O}
private static class MaxHeap{ kVk^?F
JX,&im*BG
void init(int[] data){ @e#eAJhU
this.queue=new int[data.length+1]; _Z'j%/-4@D
for(int i=0;i queue[++size]=data; d?(#NP#;
fixUp(size); a<l(zJptG
} @EH:4~
} '+1<7jl&I
{7&(2Z]z
private int size=0; kRs(A~ngc
y*A#}b*0
private int[] queue; [OBj2=
z5-vx`
public int get() { :IDD(<^9
return queue[1]; rD)yEuYX
} kD:O$8[J8
2%"2~d7
public void remove() { 9,=3D2x&
SortUtil.swap(queue,1,size--); Z-;<R$
fixDown(1); @K/}Ob4
} _hyboQi
file://fixdown BsiHVr
private void fixDown(int k) { j(mbUB*
int j; `9rwu:3i
while ((j = k << 1) <= size) { @O9.~6
if (j < size %26amp;%26amp; queue[j] j++; tjc3;9
if (queue[k]>queue[j]) file://不用交换 :U!knb"/>
break; @.ebQR-:H
SortUtil.swap(queue,j,k); p@]\N
k = j; )p'ZSXb
} -o*IJQ_
} uc9t0]o=h
private void fixUp(int k) { 57IAH$n8o
while (k > 1) { xWlj.Tjt}
int j = k >> 1; =jIB5".
if (queue[j]>queue[k]) 3a #2 }
break; 4d3]L` f
SortUtil.swap(queue,j,k); 2='gC|&s6
k = j; j+AAhn
} R{GOlxKs C
} \xG>>A%
d:*,HzG
} Br.$:g#
xrDHXqH
} OW1i{
!Kr|04Qp#x
SortUtil： (hej 3;W
wYy=Tl-N
package org.rut.util.algorithm; ||3%REliC
4b]/2H
import org.rut.util.algorithm.support.BubbleSort; d2sY.L
import org.rut.util.algorithm.support.HeapSort; 7YT%.ID
import org.rut.util.algorithm.support.ImprovedMergeSort; Qa@b-v'by
import org.rut.util.algorithm.support.ImprovedQuickSort; $qG;^1$
import org.rut.util.algorithm.support.InsertSort; y<(q<V#0!S
import org.rut.util.algorithm.support.MergeSort; 'fO[f}oa_.
import org.rut.util.algorithm.support.QuickSort; vgY ) L
import org.rut.util.algorithm.support.SelectionSort; nNJU@<|{*
import org.rut.util.algorithm.support.ShellSort; 6L[Yn?;
sy`@q<h(
/** -d]-R?mQ
* @author treeroot !$N^Ak5#
* @since 2006-2-2 #DK@&Gv
* @version 1.0 !J`>;&
*/ D/QSC]"
public class SortUtil { ;hb;%<xqT
public final static int INSERT = 1; <[mT*
public final static int BUBBLE = 2; pw|f4c7AH
public final static int SELECTION = 3; 2"+8NfFl
public final static int SHELL = 4; &#!5I;3EN
public final static int QUICK = 5; 87WIDr
public final static int IMPROVED_QUICK = 6; eV:I :::
public final static int MERGE = 7; zOJ4I^^
public final static int IMPROVED_MERGE = 8; d-/{@
public final static int HEAP = 9; 3z7SK Gy
u#(VR]u\7
public static void sort(int[] data) { k4:$LFw@
sort(data, IMPROVED_QUICK); <q@/Yy32
} QOXG:?v\
private static String[] name={ $yxwB/O(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ILi{5L
}; !p$HS0c
|f5WN&c
private static Sort[] impl=new Sort[]{ kaM=Fk=t
new InsertSort(), ptJ58U$Bb
new BubbleSort(), #dyz
new SelectionSort(), 4 mj\wBp
new ShellSort(), 7#/->Y
new QuickSort(), g7\MFertR^
new ImprovedQuickSort(), 38ac~1HjE
new MergeSort(), P?|F+RoX$
new ImprovedMergeSort(), 9!'qLO
new HeapSort() ]q!,onJ
}; BK>3rjXi>a
wf*G+&b d2
public static String toString(int algorithm){ r~f*aD
return name[algorithm-1]; ^a+W!
} ivTx6-]
w:[1,rRvT
public static void sort(int[] data, int algorithm) { Qm9r>m6p@N
impl[algorithm-1].sort(data); %3p~5jhm1
} 2ed4xhV
LPuc&8lGWf
public static interface Sort { GSlvT:k
public void sort(int[] data); m@(8-_
} wWq(|"
GFA D
public static void swap(int[] data, int i, int j) { _6U=7<f
int temp = data; ^7b[spqE
data = data[j]; 96a2G,c>V
data[j] = temp; op!ft/Yyb
} dP[vXhc
} %w9/gD