[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; f^$\+H"W
} \s~W;m
int i1=l; 3J(STIxg
int i2=mid+1; kY_UY~E
for(int cur=l;cur<=r;cur++){ qZ1fQN1yG
if(i1==mid+1) 0 ?2#SM
data[cur]=temp[i2++]; YLFTf1G9
else if(i2>r) c#Y9L+O
data[cur]=temp[i1++]; $mlsFBd
else if(temp[i1] data[cur]=temp[i1++]; X='4N<
else 2ZE4^j|
data[cur]=temp[i2++]; .Bi7~*N
} m|f|u3'z$
} \[>Rt
{|rwIRe
} Q|xPm:
n"dT^ g
改进后的归并排序: c!841~p(Q
/,:32H
package org.rut.util.algorithm.support; 0f-gQD
E* lqCh
import org.rut.util.algorithm.SortUtil; @l;f';+
O]~p)E
/** x`o_&09;CG
* @author treeroot hOwVm;:
* @since 2006-2-2 [6/%ynlP
* @version 1.0 ;$%+TN
*/ Pt1Htt:BE
public class ImprovedMergeSort implements SortUtil.Sort { aqyXxJS8
P,>#
private static final int THRESHOLD = 10; Wg$MKc9Vy[
pkxW19h*0
/* #D>8\#53V/
* (non-Javadoc) |J6CH87>
* T 7 hC]R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F`38sq
*/ }NYsKu_cM
public void sort(int[] data) { M~"K@g=Wr
int[] temp=new int[data.length]; `q5*VqIhs
mergeSort(data,temp,0,data.length-1); HX=`kkX
} _C*}14 "3
c^=,@#
private void mergeSort(int[] data, int[] temp, int l, int r) { Zd5frc$
int i, j, k; GQ[\R&]q<
int mid = (l + r) / 2; /#Xz+#SqY
if (l == r) 9wI1/>
return; z{%G
if ((mid - l) >= THRESHOLD) c3Mql+@
mergeSort(data, temp, l, mid); s\KV\5\o
else VTV-$Du[}
insertSort(data, l, mid - l + 1); H~$a6T"&
if ((r - mid) > THRESHOLD) XGO_n{x
mergeSort(data, temp, mid + 1, r); n\P{Mc
else ~5JXY5*o
insertSort(data, mid + 1, r - mid); i4uUvZf
IB?5y~+h
for (i = l; i <= mid; i++) { 9pk<=F
temp = data; )9PQj
} VvPTL8Z
for (j = 1; j <= r - mid; j++) { Z-/ E$j
temp[r - j + 1] = data[j + mid]; 43(+3$VM7
} N}^\$sVu_
int a = temp[l]; fYH%vr)
int b = temp[r]; fo5!d@Nv
for (i = l, j = r, k = l; k <= r; k++) { ikofJl]9
if (a < b) { z}pdcQl#
data[k] = temp[i++]; G_X'd
a = temp; ci*Z9&eS+
} else { X"[c[YT!%[
data[k] = temp[j--]; >Ks|yNJ
b = temp[j]; #|gt(p]C
} 0mCrA|A.
} yTmoEy. q
} yuhSP{pv'
Jj([O2Eq$
/** .ipYZg'V
* @param data fc&4e:Ve
* @param l g8B@M*JA
* @param i lJ}lO,g
*/ ;zp0,[r
private void insertSort(int[] data, int start, int len) { !qy/'v4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )WBTqML[
} C9*'.~
} VV?KJz=,W=
} #Ok*Or
} *xt3mv/<z
OHH wcJ7N
堆排序： -,p(PK
^OYar(
package org.rut.util.algorithm.support; Qs*g)Yr
4INO .
import org.rut.util.algorithm.SortUtil; #,$d!l @
jtN2%w;
/** RELLQpz3
* @author treeroot 0h$23.
* @since 2006-2-2 mNs&*h}
* @version 1.0 7zy6`OP
*/ bl:.D~@
public class HeapSort implements SortUtil.Sort{ qf+I2kyS
` 8.d
/* (non-Javadoc) mO]>(^c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?mrG^TV^+r
*/ {6A3?q
public void sort(int[] data) { &s\w: 9In
MaxHeap h=new MaxHeap(); Lymy/9
h.init(data); Ga$+x++'*
for(int i=0;i h.remove(); KLlW\MF1
System.arraycopy(h.queue,1,data,0,data.length); *qGxQ?/
} j@Z4(XL
$\{@wL
private static class MaxHeap{ mVW:]|!s
%5a>@K]
void init(int[] data){ Ean@GDLz8
this.queue=new int[data.length+1]; %?R}sUo
for(int i=0;i queue[++size]=data; ZOfyy E
fixUp(size); nIKh<ws4z
} ^P$IDJCo
} ?r#e
X8p-VCkV
private int size=0; De\&r~bTW9
Ll%[}C?~]?
private int[] queue; $^}?98m
}"%tlU!}
public int get() { i,Yv
return queue[1]; ^q7 fN0"6
} \h?C G_|]
g!cTG-bh>J
public void remove() { TDk'
SortUtil.swap(queue,1,size--); iIA&\'|;i
fixDown(1); '$;S?6$eW
} 5c!~WckbJ
file://fixdown -T`rk~A9A
private void fixDown(int k) { vG69z&
int j; pjWqI6,
while ((j = k << 1) <= size) { LZ}C{M{=5A
if (j < size %26amp;%26amp; queue[j] j++; 6Jrh'6o@
if (queue[k]>queue[j]) file://不用交换 gI<TfcC
break; 5fA<I _ D
SortUtil.swap(queue,j,k); h /@G[5E
k = j; zT*EpIa+LS
} W{Ine> a'
} DHd9yP9-
private void fixUp(int k) { C/$-^
while (k > 1) { iE!\)7y
int j = k >> 1; -:dUD1
if (queue[j]>queue[k]) ^[uA^
break; bBn4m:
SortUtil.swap(queue,j,k); VE6 V^6SL
k = j; f3[gAY
} $&I##od
} S{zi8Oc6
:4;ZO~eq!
} F/IXqj
B{PI&a9~s%
} M6[&od
&2d^=fih
SortUtil： K}L-$B*i
4%0eX]
package org.rut.util.algorithm; #ih(I7prH
pPuE-EDk
import org.rut.util.algorithm.support.BubbleSort; cLEBcTx
import org.rut.util.algorithm.support.HeapSort; Oca_1dlx
import org.rut.util.algorithm.support.ImprovedMergeSort; /ZUKt
import org.rut.util.algorithm.support.ImprovedQuickSort; 9,sj,A1
import org.rut.util.algorithm.support.InsertSort; (i^{\zv
import org.rut.util.algorithm.support.MergeSort; xlZ"F
import org.rut.util.algorithm.support.QuickSort; ?4P*,c
import org.rut.util.algorithm.support.SelectionSort; ryg1o=1v/
import org.rut.util.algorithm.support.ShellSort; bx_`S#*N
NiQ`,Q$B
/** !ZJ"lm
* @author treeroot B\G?dmo
* @since 2006-2-2 }_vE lBh6$
* @version 1.0 BxS\"W
*/ F#*vJb)
public class SortUtil { *$1M=$
public final static int INSERT = 1; 6sJN@dFA
public final static int BUBBLE = 2; 4Z12Z@A#7
public final static int SELECTION = 3; M_<O'Ii3
public final static int SHELL = 4; !`LaX!bmp
public final static int QUICK = 5; ouL/tt_~
public final static int IMPROVED_QUICK = 6; L}T:Y).
public final static int MERGE = 7; f 0A0uU8y
public final static int IMPROVED_MERGE = 8; -,C">T%\
public final static int HEAP = 9; D6=Z%h\*
L0H;y6&
public static void sort(int[] data) { F[BJhN*]a
sort(data, IMPROVED_QUICK); 4|9M8ocR
} '/trM%<
private static String[] name={ B"rnSui
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yV,ki^^
}; D~E1hr&Vd>
a|Io)Qhr
private static Sort[] impl=new Sort[]{ eKPxSN Z
new InsertSort(), z-$bce9*
new BubbleSort(), ~8L*N>Y
new SelectionSort(), osPJ%I`^
new ShellSort(), qpjtF'
new QuickSort(), r~&"D#)sy
new ImprovedQuickSort(), #; CC"
new MergeSort(), >>oR@
new ImprovedMergeSort(), #9M6 q
new HeapSort() ^x-vOGlR
}; Cgq/#2BM
3z';Zwz &X
public static String toString(int algorithm){ {>PN}fk2QP
return name[algorithm-1]; 6A&e2K>A
} /`McKYIP
K<TVp;N
public static void sort(int[] data, int algorithm) { $<cio X
impl[algorithm-1].sort(data); G5a PjP
} (ZH5/VKp
|:BKexjHL
public static interface Sort { Fr_esx
public void sort(int[] data); 5G"LuA
} +RWP;rk
HI)MBrj;r
public static void swap(int[] data, int i, int j) { 4+2XPaIm
int temp = data; -e0C Bp
data = data[j]; &D0suK#
data[j] = temp; ?0 93'lA
} [!1z; /
} b~dm+5W7