[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; O '#FVZ.g
} ,%/F,O+#
int i1=l; e 0$m<5
int i2=mid+1; B;Z _'.i,d
for(int cur=l;cur<=r;cur++){ 1HSt}
if(i1==mid+1) xK[[b
data[cur]=temp[i2++]; :1t&>x=T
else if(i2>r) 3k_\xQ
data[cur]=temp[i1++]; RF<f
else if(temp[i1] data[cur]=temp[i1++]; oVUsI,8
else qe1>UfY
data[cur]=temp[i2++]; NV{= tAR
} [xfg6
} p `oB._ R
,lCFe0>k!=
} +c]D2@ctG
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改进后的归并排序: Y -BZV |
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package org.rut.util.algorithm.support; H^B,b!5i
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import org.rut.util.algorithm.SortUtil; hms Aim9i
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/** *.$ov<E.
* @author treeroot hn6'$P
* @since 2006-2-2 ~ c~j
* @version 1.0 P-^-~/>n
*/ Lo[;{A$u
public class ImprovedMergeSort implements SortUtil.Sort { ='Oxy
.d#Hh&jj
private static final int THRESHOLD = 10; 92,@tNQQ}
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/* ga1b%5]v.
* (non-Javadoc) ZS3T1 <z
* o+^e+ptc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]t17= Lr?
*/ 1G(wESe
public void sort(int[] data) { \ X6y".|-
int[] temp=new int[data.length]; zuJ` 704
mergeSort(data,temp,0,data.length-1); GXv2B%i8
} h52+f
Iw$T'I+4W
private void mergeSort(int[] data, int[] temp, int l, int r) { w3fD6$
int i, j, k; Uq%|v
int mid = (l + r) / 2; ,pZz`B#
if (l == r) ](ztb)
return; guy!/zQ>A
if ((mid - l) >= THRESHOLD) )i-`AJK-'v
mergeSort(data, temp, l, mid); YSZ[~?+
else u91
insertSort(data, l, mid - l + 1); &$qIJvMiK
if ((r - mid) > THRESHOLD) "1P2`Ep;
mergeSort(data, temp, mid + 1, r); ,:81DA
else $Ixd;`l*
insertSort(data, mid + 1, r - mid); da8 R.1o
~Ty6]A
for (i = l; i <= mid; i++) { 4g.S!-H@R
temp = data; %z @T /
} "VsS-b^P
for (j = 1; j <= r - mid; j++) { HqOnZ>D
temp[r - j + 1] = data[j + mid]; Oh}@c~7;
} <(qdxdUp
int a = temp[l]; e [F33%
int b = temp[r]; Uzn
for (i = l, j = r, k = l; k <= r; k++) { eLyIQoW
if (a < b) { 6|Rj YX
data[k] = temp[i++]; !<-+}X+o8$
a = temp; x||b:2
} else { lnxA/[`a
data[k] = temp[j--]; Oo\~'I
b = temp[j]; sg]g;U
} $- Z/UHT
} >R/^[([;]
} r^\Wo7q
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/** 8,m:
* @param data 8HSGOs =8
* @param l F|WH=s3
* @param i okW'}@jD
*/ Pb :6nH=
private void insertSort(int[] data, int start, int len) { =gB{(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0g@*N4
} RQn3y-N]
} )T^aJ-Uf
} 0ENqK2
} AkqGk5e ^
afcyAzIB&
堆排序： AqrK==0N
TF,a`?c`
package org.rut.util.algorithm.support; JnH5v(/
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import org.rut.util.algorithm.SortUtil; .aIFm5N3?
]<O-
/** A5dH*< }
* @author treeroot gm&O-N"=U
* @since 2006-2-2 iB'g7&,L
* @version 1.0 O{G $]FtF
*/ k1WyV_3
public class HeapSort implements SortUtil.Sort{ ]0p*EB=C*
>LB x\/
/* (non-Javadoc) h6Hop mWVx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) odq3@ ziO
*/ VzFzVeJ
public void sort(int[] data) { xm<sH!,j
MaxHeap h=new MaxHeap(); uFi[50
h.init(data); y\[GS2nTX
for(int i=0;i h.remove(); 5z:/d`P[
System.arraycopy(h.queue,1,data,0,data.length); %gx>|
} tgm(tDL
Yf^/YLLS
private static class MaxHeap{ Z@:R'u2Lk
hB*3Py27L
void init(int[] data){ e-o$bf%
this.queue=new int[data.length+1]; !]WC~#|{B
for(int i=0;i queue[++size]=data; 4>[tjz.?k
fixUp(size); B.[5N;c
} ["?WVXCF8|
} < 'qtqUL\
kI$p~
private int size=0; M7IQJFra
DWJkN4}o
private int[] queue; /K#J63 ,
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public int get() { t~]oJ5%
return queue[1]; e?b<-rL
} $L$GI~w/
p/uOCQ|1l
public void remove() { QWxl$%`89<
SortUtil.swap(queue,1,size--); u&Dd9kMz
fixDown(1); iJK rNRj
} 4K*DEVS
file://fixdown ]z/
private void fixDown(int k) { 'Xzi$}E D
int j; qS+Ilg
while ((j = k << 1) <= size) { l{x?i00tAS
if (j < size %26amp;%26amp; queue[j] j++; m4@w M?
if (queue[k]>queue[j]) file://不用交换 &($Zs'X
break; 32V,25 (`5
SortUtil.swap(queue,j,k); gbRdng7(}
k = j; [Z?vC
} ./;*LD
} -Qco4>Z8
private void fixUp(int k) { a'|Dm7'4t
while (k > 1) { $JXQn
int j = k >> 1; mJ5LRpXN
if (queue[j]>queue[k]) OKq={l
break; Y_Lsmq2!
SortUtil.swap(queue,j,k); 7QkAr
k = j; ,s1n!@9
} ui6B
} r\66]u[
YPq`su7m9
} *:A)j?(
`Lu\zR%<
} KBFAV&
DWH)<\?
SortUtil： Uyyw'Ni
k||DcwO
package org.rut.util.algorithm; +#<"o#gZ
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import org.rut.util.algorithm.support.BubbleSort; =<[ZFO~v
import org.rut.util.algorithm.support.HeapSort; &^YY>]1Py
import org.rut.util.algorithm.support.ImprovedMergeSort; ,/>~J]:\;
import org.rut.util.algorithm.support.ImprovedQuickSort; MXhRnVz"W
import org.rut.util.algorithm.support.InsertSort; B1Iq:5nmoS
import org.rut.util.algorithm.support.MergeSort; {N,w5!cP
import org.rut.util.algorithm.support.QuickSort; uy;3s=03^
import org.rut.util.algorithm.support.SelectionSort; D r$N{d
import org.rut.util.algorithm.support.ShellSort; 5OUe|mS
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/** g)iSC?H
* @author treeroot !f\6=Z?>3
* @since 2006-2-2 DEC,oX!bI1
* @version 1.0 yMa5?]J
*/ 3?uP$(l
public class SortUtil { , 0rC_)&B
public final static int INSERT = 1; :+,qvu!M7
public final static int BUBBLE = 2; }a_: oR
public final static int SELECTION = 3; m"vV=6m|\
public final static int SHELL = 4; [@/[#p
public final static int QUICK = 5; Va/p
public final static int IMPROVED_QUICK = 6; ~+$l9~`{
public final static int MERGE = 7; 6dmTv9e
public final static int IMPROVED_MERGE = 8; Z@8amT;Y
public final static int HEAP = 9; /qL&)24
qQ6NxhQo
public static void sort(int[] data) { 9aC>gye!
sort(data, IMPROVED_QUICK); HF\L`dJX?
} tIC_/ 6
private static String[] name={ q& Vt*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E|Grk
}; `czXjZE
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private static Sort[] impl=new Sort[]{ 2s6Hr;^w.1
new InsertSort(), {_/6,22j(V
new BubbleSort(), I>-jKSkwc
new SelectionSort(), tZXtt=M w
new ShellSort(), MOmp{@
new QuickSort(), aTs_5q
new ImprovedQuickSort(), ^HL#)fK2I
new MergeSort(), XfsCu>
new ImprovedMergeSort(), X>|.BvY|
new HeapSort() ]3QQ"HLcp
}; _L!"3
gi@+27;
public static String toString(int algorithm){ Z9aDE@A
return name[algorithm-1]; >8tE`2[i*
} &:jE+l
nw5#/5xw
public static void sort(int[] data, int algorithm) { oaBfq8,;
impl[algorithm-1].sort(data); 8a)EL*LH`
} Vq'&t<K#
m9xu$z|e
public static interface Sort { }}(~'
public void sort(int[] data); \^-3)*r
} ?\#4`9
4'rk3nT8
public static void swap(int[] data, int i, int j) { Y!*,G]7
int temp = data; xG}eiUbM`
data = data[j]; c*1x*'j.
data[j] = temp; ?I/,r2ODLh
} c@q>5fR/c
} l2`8]Qr