[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; d>!p=O`>{q
} yX!#a>d"H
int i1=l; Qra>}e%*
int i2=mid+1; kcS6_l
for(int cur=l;cur<=r;cur++){ f#P_xn&et
if(i1==mid+1) U$'y_}V
data[cur]=temp[i2++]; }V]eg,.BJ
else if(i2>r) l^r' $;<m
data[cur]=temp[i1++]; IN^_BKQt
else if(temp[i1] data[cur]=temp[i1++]; +(mL~td01
else |C D}<r(N
data[cur]=temp[i2++]; % {Q-8w!
} K@r*;T
} JJ5C}`(
2-v\3voN
} cNj*E =~;
kon=il<@
改进后的归并排序: ;+`uER
~lw<799F6
package org.rut.util.algorithm.support; lLCdmxbT
2OalAY6RS
import org.rut.util.algorithm.SortUtil; &+r4
]a/'6GbR
/** >}SRSqJu
* @author treeroot IKcKRw/O$
* @since 2006-2-2 (F8AL6
* @version 1.0 Ror2qDF
*/ mP-2s;q
public class ImprovedMergeSort implements SortUtil.Sort { %;O}FyP
de YyaV
private static final int THRESHOLD = 10; H06Bj(Y!
A}G|Yfn
/* AyTx'u
* (non-Javadoc) jTSOnF}C~+
* SLoo:)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qI2'u%
*/ 6fwY$K\X
public void sort(int[] data) { O3%[dR
int[] temp=new int[data.length]; Np)aS[9W
mergeSort(data,temp,0,data.length-1); I]uhi{\C
} i&Kz*,pt
(ZPXdr
private void mergeSort(int[] data, int[] temp, int l, int r) { <k]qH-v4
int i, j, k; 7GZq|M_:y
int mid = (l + r) / 2; ;V.vfar
if (l == r) U:lv^QPG
return; 509Q0 [k
if ((mid - l) >= THRESHOLD) ;NsO
mergeSort(data, temp, l, mid); k dU! kj
else C6@t
insertSort(data, l, mid - l + 1); ,{{SI
if ((r - mid) > THRESHOLD) XDLEVSly7
mergeSort(data, temp, mid + 1, r); TzM=LvA
else ?~F. /
insertSort(data, mid + 1, r - mid); )U(u>SV(\
T;?+kC3
for (i = l; i <= mid; i++) { N z~"vi(t
temp = data; n33kb/q*
} G)7)]yBL
for (j = 1; j <= r - mid; j++) { D1X{:#|
temp[r - j + 1] = data[j + mid]; @ajM^L!O
} t26ij`V
int a = temp[l]; 0Nr\2|
int b = temp[r]; *fhX*e8y
for (i = l, j = r, k = l; k <= r; k++) { I@./${o
if (a < b) { OFy,B-`A{
data[k] = temp[i++]; =nhzMU9c\y
a = temp; NWKi ()nA%
} else { {ZqQ!!b
data[k] = temp[j--]; pm]fQuq
b = temp[j]; lbkLyp2
} ^ d\SPZ
} xzk}[3P{
} Qpu3(`d<
JR1*|u
/** -JTG?JOd]
* @param data PDC]wZd/
* @param l 7rIlTrG
* @param i 7~vqf3ON4J
*/ >saI+u'o
private void insertSort(int[] data, int start, int len) { pFIecca w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #nEL~&
} )zJ=PF
} .#!mDlY;
} ~B_ D@gV|
} RvW.@#EH0
_4R,Ej}
堆排序： yNva1I
Kbas-</Si
package org.rut.util.algorithm.support; h5-d;RKE
o#e7,O
import org.rut.util.algorithm.SortUtil; treXOC9^B8
rJ(OAKnY
/** OCW+?B;
* @author treeroot O5-;I,)H
* @since 2006-2-2 yWHne~!
* @version 1.0 2Xgx*'t\
*/ tpU D0Z)
public class HeapSort implements SortUtil.Sort{ jG8;]XP
]u=Ca#!'
/* (non-Javadoc) {!=2<-Aq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hsl{rN
*/ E@pFTvo
public void sort(int[] data) { CG9ba|
MaxHeap h=new MaxHeap(); h{/ve`F>@
h.init(data); W)-hU~^OM
for(int i=0;i h.remove(); P<L&c_u
System.arraycopy(h.queue,1,data,0,data.length); bp%S62Dj
} H[BYE
1Z:R,\+L
private static class MaxHeap{ qGa<@ b
J3&Sj{ o
void init(int[] data){ |nm2Uy/0
this.queue=new int[data.length+1]; ifrq
for(int i=0;i queue[++size]=data; (1 yGg==W.
fixUp(size); rfTe
} ^zeL+(@r/
} g7Z9F[d
$8@+j[>
private int size=0; .e$%[)D
o7arxo\
private int[] queue; w `!LFHK
;eh/_hPM
public int get() { } J(1V!EA
return queue[1]; (}0S1)7t
} 6Ahr_{
YFqZe6g0$
public void remove() { Ilef+V^qr
SortUtil.swap(queue,1,size--); bK7.St
fixDown(1); %M6 c0d[9-
} ^j iE9k)
file://fixdown ^4UcTjh
private void fixDown(int k) { 6eo4#/+%
int j; /.v_N%*-v
while ((j = k << 1) <= size) { m&cvU>lC
if (j < size %26amp;%26amp; queue[j] j++; 4k$0CbHx0
if (queue[k]>queue[j]) file://不用交换 H;wR
break; )JX$/- RD-
SortUtil.swap(queue,j,k); +"Ub/[J{G1
k = j; 9A<0zt
} xp=Zd\5W$
} 6KB^w0oA
private void fixUp(int k) { mQ=sNZ-d]
while (k > 1) { u GIr&`S
int j = k >> 1; Y"oDFo,
if (queue[j]>queue[k]) B~rU1Y)
break; f?5A"-NS
SortUtil.swap(queue,j,k); E[*0Bo]
k = j; U1kh-8 :
} 19&)Yd1
} }Az'Zu4 =
p2^)2v
} 9.]kOs_
OF-WUa4t
} `~h0?g
Tplg2p%k
SortUtil： ]7l{g9?ZtV
[x|)}P7%s
package org.rut.util.algorithm; sy=dY@W^
lfRH`u
import org.rut.util.algorithm.support.BubbleSort; ?#i|>MRR>
import org.rut.util.algorithm.support.HeapSort; ExqM1&zpK
import org.rut.util.algorithm.support.ImprovedMergeSort; j^{b^!4~}
import org.rut.util.algorithm.support.ImprovedQuickSort; =tHD 4I
import org.rut.util.algorithm.support.InsertSort; LGXZx}4@;
import org.rut.util.algorithm.support.MergeSort; c`pYc
import org.rut.util.algorithm.support.QuickSort; :-U53}Iy
import org.rut.util.algorithm.support.SelectionSort; :^5>wDu{
import org.rut.util.algorithm.support.ShellSort; -zR.'x%
$-e=tWkgv
/** SNN#$8\
* @author treeroot {F/q{c~]
* @since 2006-2-2 &AJUY()8
* @version 1.0 :k\}Ik
*/ f:&)"
public class SortUtil { Wy!uRzbBv
public final static int INSERT = 1; 0yKhp:^
public final static int BUBBLE = 2; @H6%G>K,
public final static int SELECTION = 3; !L/tLHk+
public final static int SHELL = 4; T"IW Jpc
public final static int QUICK = 5; c|+y9(0|y
public final static int IMPROVED_QUICK = 6; b70AJe=
public final static int MERGE = 7; Pm~,Ky&Hl
public final static int IMPROVED_MERGE = 8; q{[1fE"[K4
public final static int HEAP = 9; ^SgN(-QH
ps"9;4P
public static void sort(int[] data) { yZ?$8r
sort(data, IMPROVED_QUICK); 2G H)iUmc
} aw]8V:)$J
private static String[] name={ qR_SQ VN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3eJ\aVI>pE
}; =I7[L{+~Y
/8:gVXZi
private static Sort[] impl=new Sort[]{ \_?yzgf
new InsertSort(), p?}&)Un
new BubbleSort(), b#e]1Q
new SelectionSort(), p0
new ShellSort(), UC.8DaIPN
new QuickSort(), w~ijD ^g
new ImprovedQuickSort(), x4@MO|C
new MergeSort(), z_'dRw
new ImprovedMergeSort(), f]hBPkZ6
new HeapSort() Sio1Q0
}; gNG.l
\ =S3 L<
public static String toString(int algorithm){ U-ERhm>uk
return name[algorithm-1]; Ca$y819E2
} .[#xQ=9`
`Yg7,{A\J
public static void sort(int[] data, int algorithm) { \m@]G3=]
impl[algorithm-1].sort(data); .V7Y2!4TE
} $#D n4
dvC0 <*V
public static interface Sort { |{zHM23gD
public void sort(int[] data); KsZ@kTs
} X>3iYDe
| pF5`dX
public static void swap(int[] data, int i, int j) { !Jk(&.
int temp = data; i-|/2I9%
data = data[j]; E {I)LdAqK
data[j] = temp; }_Tt1iai*
} ^- u[q- !
} USlF+RY@3L