[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; #;yZ
} #;e:A8IQ
int i1=l; vk^xT
int i2=mid+1; _`T_">9r
for(int cur=l;cur<=r;cur++){ ?fSG'\h>
if(i1==mid+1) S,UDezxg
data[cur]=temp[i2++]; v!5 `|\
else if(i2>r) a1lh-2xX
data[cur]=temp[i1++]; T8$y[W-c
else if(temp[i1] data[cur]=temp[i1++]; kDxFloK
else u6JM]kR
data[cur]=temp[i2++]; *GPiOA a
} }Sv:`9=
} Y$_B1_
wc4=VC"y
} 0GeTSFj
WOap+
改进后的归并排序: TC*g|d @b
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package org.rut.util.algorithm.support; 4!?eRY
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import org.rut.util.algorithm.SortUtil; YS0<qSN
^ Ze=uP
/** Q;rX;p^W
* @author treeroot NBGH_6DROw
* @since 2006-2-2 kuP(r
* @version 1.0 sXPe/fWo
*/ )SGq[B6@I
public class ImprovedMergeSort implements SortUtil.Sort { ?UoBV$
|CyE5i0
private static final int THRESHOLD = 10; 5.GR1kl6
'H;*W|:-]
/* iH@UTE;
* (non-Javadoc) =Xr.'(U
* gcT%c|.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gPPkT"
*/ WNtW|IV
public void sort(int[] data) { ww1[rCh\+
int[] temp=new int[data.length]; lThB2/tV\
mergeSort(data,temp,0,data.length-1); [7y]n;Fy
} 8":Q)9;%
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private void mergeSort(int[] data, int[] temp, int l, int r) { y:uE3Apm
int i, j, k; gB33?
int mid = (l + r) / 2; +NUG
if (l == r) X&H"51
return; eHUOU>&P]
if ((mid - l) >= THRESHOLD) |[8Th4*n
mergeSort(data, temp, l, mid); Ny/MJ#Lq
else *vMn$,^0h9
insertSort(data, l, mid - l + 1); )^hbsMhO
if ((r - mid) > THRESHOLD) #RLt^$!H
mergeSort(data, temp, mid + 1, r); J{G?-+`
else C0Z=~Q%
insertSort(data, mid + 1, r - mid); seJ^s@H5l
{'H(g[k
for (i = l; i <= mid; i++) { mt.))#1
temp = data; aN3;`~{9
} e\/w'
for (j = 1; j <= r - mid; j++) { J'r^/
temp[r - j + 1] = data[j + mid]; GQ ;;bcj&
} B9S@(/"7
int a = temp[l]; lyhiFkO iH
int b = temp[r]; _aeBauD
for (i = l, j = r, k = l; k <= r; k++) { COlaD"Y
if (a < b) { 'J|_2*
data[k] = temp[i++]; MolgwVd
a = temp; 6Kz,{F@
} else { x,'!gT:j
data[k] = temp[j--]; \~wMfP8
b = temp[j]; d0> zS
} G3v5KmT
} [2cD:JL
} \fe]c :
q5S9C%b
/** dAj$1Ke
* @param data ]]yO1x$Kk
* @param l I%Z
* @param i 3Zh)]^
*/ lu/ (4ED
private void insertSort(int[] data, int start, int len) { w4Z'K&d=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); poFg1
} Ek}A]zC
} > Nr#O
} TL#3;l^
} Oow2>F%_#
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堆排序： 3;Fhg!ZO
a[TMDU;(/4
package org.rut.util.algorithm.support; ml$o5&sN
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import org.rut.util.algorithm.SortUtil; L/^I*p,
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/** Rx}Gz$
* @author treeroot vr^qWn
* @since 2006-2-2 Lj;2\]
* @version 1.0 PFK '$
*/ OZ!^ak
public class HeapSort implements SortUtil.Sort{ 1aABzB ^
wlmRe`R
/* (non-Javadoc) pD]OT-8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) POR\e|hRT]
*/ e?f IXk~b
public void sort(int[] data) { G*v,GR
MaxHeap h=new MaxHeap(); jF*j0PkNdb
h.init(data); 29q _BR *:
for(int i=0;i h.remove(); -|\ZrE_h
System.arraycopy(h.queue,1,data,0,data.length); ^sg,\zD 'X
} sn>~O4"
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private static class MaxHeap{ WMP,\=6k0
,6W>can
void init(int[] data){ HUOj0T
this.queue=new int[data.length+1]; ]M'=^32
for(int i=0;i queue[++size]=data; L&OwPd
fixUp(size); 61 ~upQaR
} t&Og$@
} jlg(drTo
dAe')N:KPI
private int size=0; H 7 ^/q7
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private int[] queue; y18Y:)DkL
&G$Ucc `
public int get() { KCDE{za
return queue[1]; P L+sR3bR
} 1g~R/*Jo
j1HW._G
public void remove() { /|#fejPh
SortUtil.swap(queue,1,size--); W|(1Y D
fixDown(1); kz7(Z'pw
} 4I5Y,g{6+
file://fixdown Ld-_,-n
private void fixDown(int k) { IdxzE_@
int j; W'TaBuCb
while ((j = k << 1) <= size) { pcI uN
if (j < size %26amp;%26amp; queue[j] j++; ]"1DGg \A
if (queue[k]>queue[j]) file://不用交换 9JKEw
break; bK-N:8Z
SortUtil.swap(queue,j,k); maR"t+
k = j; cPc</[x[W
} _n\GNUA
} 5QO9Q]I#_\
private void fixUp(int k) { Jqi%|,/]N
while (k > 1) { -C&P%tt Y
int j = k >> 1; vgN&K@hJ
if (queue[j]>queue[k]) 0'o:#-
break; w"&n?L
SortUtil.swap(queue,j,k); 1ZB"EQ
k = j; FN) $0
} "G9xMffW
} ?#Q #u|~
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} *siFj CN<
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} ges J/I
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SortUtil： Lbb0_-']
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package org.rut.util.algorithm; %C_HXr@
',5ky{
import org.rut.util.algorithm.support.BubbleSort; =zs`#-^8
import org.rut.util.algorithm.support.HeapSort; ]L}dzA?:
import org.rut.util.algorithm.support.ImprovedMergeSort; j^2j&Ta
import org.rut.util.algorithm.support.ImprovedQuickSort; v1,oilL
import org.rut.util.algorithm.support.InsertSort; gr-OHeid
import org.rut.util.algorithm.support.MergeSort; @49S`
import org.rut.util.algorithm.support.QuickSort; KRKCD4
import org.rut.util.algorithm.support.SelectionSort; d9|<@A
import org.rut.util.algorithm.support.ShellSort; .Rf_Cl
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/** }?v )N).kW
* @author treeroot Z>#i**
* @since 2006-2-2 2Q:+_v
* @version 1.0 4tmAzD
*/ 0%I=d
public class SortUtil { pIKPXqA
public final static int INSERT = 1; ,UdVNA
public final static int BUBBLE = 2; x.R4%Z
public final static int SELECTION = 3; Y% 5eZ=z
public final static int SHELL = 4; ZO$%[ftb
public final static int QUICK = 5; jsi!fx2Rm
public final static int IMPROVED_QUICK = 6; T:W4$P
public final static int MERGE = 7; )p%E%6p
public final static int IMPROVED_MERGE = 8; w$-6-rE]d
public final static int HEAP = 9; S#} KIy
)q3p-)@kQ
public static void sort(int[] data) { 6<(.4a?
sort(data, IMPROVED_QUICK); n#_$\ p>Yd
} W#3Q ^Z?
private static String[] name={ v^+Sh|z/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "AGLVp.zT
}; WX6&oy>
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private static Sort[] impl=new Sort[]{ !0mI;~q|F
new InsertSort(), U}j0D2
new BubbleSort(), 'F#KM1s
new SelectionSort(), B~Xw[q
new ShellSort(), ))'<_nD
new QuickSort(), ~zNAbaC+>t
new ImprovedQuickSort(), XAL1|]S
new MergeSort(), iTU5l5Uz
new ImprovedMergeSort(), N_[*H
new HeapSort() xe&i^+i
}; ;q6Ki.D
G{%LB}2
public static String toString(int algorithm){ fNZ__gO!%
return name[algorithm-1]; y;@:ulv[
} [RTs[3E^
@@%.t|=
public static void sort(int[] data, int algorithm) { QWHug:c
impl[algorithm-1].sort(data); 3"KCh\\b
} nt7.?$
"vE4E|
public static interface Sort { E\pL!c
public void sort(int[] data); )gy!GK
} QbpFE)TYJ|
D]Xsvv #
public static void swap(int[] data, int i, int j) { ) M BQuiL
int temp = data; q;>7*Y&
data = data[j]; (+y
data[j] = temp; .z}~4BY
} K~ehP[^
} P;]F(in=