[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; :q ti
} ub7zA!%
int i1=l; A;5n:Sd
int i2=mid+1; :1 (p.q=
for(int cur=l;cur<=r;cur++){ @)-sTgn
if(i1==mid+1) Bt1p'g(V|
data[cur]=temp[i2++]; D,;\o7V
else if(i2>r) ygeDcnvR]
data[cur]=temp[i1++]; :`E8Z:-R
else if(temp[i1] data[cur]=temp[i1++]; uMut=ja(U
else ]E_h
data[cur]=temp[i2++]; xBUya4w
} ]BtbWKJBqe
} ak->ML
\=+b}mKV m
} wUiys/OVM
!iH-#B-
改进后的归并排序: _2k]3z?
d}LRl"_n
package org.rut.util.algorithm.support; RG3l.jL
8%%f%y
import org.rut.util.algorithm.SortUtil; {g2@6ct
g8Q5m=O*
/** ebS0qo[oLH
* @author treeroot '; =f
* @since 2006-2-2 uHH/rMV
* @version 1.0 tniDF>Rb
*/ pWPIJ>2G:
public class ImprovedMergeSort implements SortUtil.Sort { X/z6"*(|/
AX?fuDLs
private static final int THRESHOLD = 10; T21ky>8E
D'L'#/hK
/* } X^|$
* (non-Javadoc) )+6v
* 3uZJ.Fb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1z&Ly3
*/ B=>RH!&
public void sort(int[] data) { 0dA7pY9
int[] temp=new int[data.length]; @HRC\OG
mergeSort(data,temp,0,data.length-1); hty0Rb[dH
} 5Xl/L
oq4}3bQ
private void mergeSort(int[] data, int[] temp, int l, int r) { HDda@Jy
int i, j, k; MZTx:EN!
int mid = (l + r) / 2; u)ev{)$TM
if (l == r) /;7y{(o
return; 1"pI^Ddt
if ((mid - l) >= THRESHOLD) %V1Z~HC
mergeSort(data, temp, l, mid); q}/WQ]p} <
else 2RqbrY n
insertSort(data, l, mid - l + 1); ot`%*
if ((r - mid) > THRESHOLD) lqowG!3H
mergeSort(data, temp, mid + 1, r); oEx\j+}@n
else j:}J}P
insertSort(data, mid + 1, r - mid); _(d.!qGz
\S*$UE]uG
for (i = l; i <= mid; i++) { b{d4xU8'
temp = data; :U d
} SG?Nsp^%`B
for (j = 1; j <= r - mid; j++) { 1VF
temp[r - j + 1] = data[j + mid]; BnCKSg7V
} [97KBoSU
int a = temp[l]; 9U {y1}
int b = temp[r]; RbGJ)K!
for (i = l, j = r, k = l; k <= r; k++) { 7R3fqU.Rq
if (a < b) { 8>7RxSF
data[k] = temp[i++]; l"{Sm6:;-
a = temp; CvPioi
} else { K*IxUz(
data[k] = temp[j--]; xy8#2
b = temp[j]; \XF}?*8
} cO\-
} =?])['VaA
} Uz608u
{/LZcz[
/** afV P-m4L
* @param data 6BR\iZ
* @param l M@5KoMsB9
* @param i O'@m4@L
*/ @>gD1Q7v b
private void insertSort(int[] data, int start, int len) { gRw.AXRa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g8rp|MOH
} mC%%)F'Zf
} S]5VEn;pV
} IMw "eV
} CF,8f$:2
=]WW'~
堆排序： ;!^ +N
d"LoK,p#
package org.rut.util.algorithm.support; A-X
ef^Cc)S-Q
import org.rut.util.algorithm.SortUtil; mQmBf|Rl
e!.7no
/** |K'Gw}fX/
* @author treeroot l@~1CMyN
* @since 2006-2-2 :,urb*
* @version 1.0 0>I]=M]@
*/ M" xZz
public class HeapSort implements SortUtil.Sort{ wxH(&CB-{
9k(*?!\;
/* (non-Javadoc) cZCGnzy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XhQw+j~1.
*/ bnAT,v{
public void sort(int[] data) { Jslk
MaxHeap h=new MaxHeap(); j` [#Ij
h.init(data); aW52.X z%8
for(int i=0;i h.remove(); R>/QARX
System.arraycopy(h.queue,1,data,0,data.length); 5HWwl.D
} ?|%\<h@;
{m?K2]](
private static class MaxHeap{ D[?k ,*
2rPcNh9
void init(int[] data){ Sb@{f<3E
this.queue=new int[data.length+1]; oG4w8+N
for(int i=0;i queue[++size]=data; yYxeNE"
fixUp(size); gaLEhf^
} d,GtH)(s
} aF;]7i@
[dSDg2]
private int size=0; ]7XkijNb
dv1x78xG>
private int[] queue; ,7n;|1`
4yJ*85e]
public int get() { Q:-%3)g<<
return queue[1]; v!pj v%
} Lo$Z>u4(c
fg>B
public void remove() { ~x4{P;y
SortUtil.swap(queue,1,size--); []2$rJZD9
fixDown(1); :_{{PY0PK
} =sUl`L+w,L
file://fixdown $'J6#Vs
private void fixDown(int k) { ?$)x$nS`
int j; d'lr:=GQ
while ((j = k << 1) <= size) { L5V'Sr
if (j < size %26amp;%26amp; queue[j] j++; A4 A6F<
if (queue[k]>queue[j]) file://不用交换 5vUz
break; z^a6%N
SortUtil.swap(queue,j,k); ^hl]s?"3
k = j; yKe*<\
} ]]h:#A2
} 6h0U
private void fixUp(int k) { epGX.
while (k > 1) { OW63^wA`s
int j = k >> 1; m>*A0&??[
if (queue[j]>queue[k]) &0th1-OP_
break; I\Gp9w0f
SortUtil.swap(queue,j,k); ;mo\ yW1
k = j; z 1#0
} ]JqkC4|
} @sgT[P*ut
tz0Ttu=xH
} )D"G3g.
xM'S ;Sg
} d=4f`q0k
}!Diai*C
SortUtil： }n2-*{)x
;}>g1&q
package org.rut.util.algorithm; |0%4Gk);
pw<q?q%
import org.rut.util.algorithm.support.BubbleSort; Rbj+P;t&
import org.rut.util.algorithm.support.HeapSort; lM|WOmD
import org.rut.util.algorithm.support.ImprovedMergeSort; @aiLGwh
import org.rut.util.algorithm.support.ImprovedQuickSort; G2yUuyAZ
import org.rut.util.algorithm.support.InsertSort; io+7{B=u$
import org.rut.util.algorithm.support.MergeSort; s68_o[[E
import org.rut.util.algorithm.support.QuickSort; ~0^,L3M
import org.rut.util.algorithm.support.SelectionSort; "$E!_
import org.rut.util.algorithm.support.ShellSort; Fzld0p9=
/c$Ht
/** U38wGSG
* @author treeroot 0Yzb=QMD
* @since 2006-2-2 Er/5 ,
* @version 1.0 @+CSY-g$
*/ z$BnEd.y=:
public class SortUtil { )[M<72
public final static int INSERT = 1; |YGiATD4DG
public final static int BUBBLE = 2; :{xN33@6\X
public final static int SELECTION = 3; DCt:EhC
public final static int SHELL = 4; @aD~YtL"n
public final static int QUICK = 5; b gc<)=
public final static int IMPROVED_QUICK = 6; #c)Ou!Ldb
public final static int MERGE = 7; P7x?!71?L
public final static int IMPROVED_MERGE = 8; >ya-
public final static int HEAP = 9; )p^jsv.
7SY->-H8
public static void sort(int[] data) { x"wM_hl5L
sort(data, IMPROVED_QUICK); wpdEI(
} q'V{vFfY%
private static String[] name={ -L'K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g1*H|nh2
}; XX[Wwt
W7[S7kd
private static Sort[] impl=new Sort[]{ oJ@PJvmR&a
new InsertSort(), PKM$*_LcGI
new BubbleSort(), XsN#<"f;i
new SelectionSort(), .sR&9FH
new ShellSort(), S,tVOxs^
new QuickSort(), Dw ;vDK
new ImprovedQuickSort(), DF[b?
new MergeSort(), W>|b98NPu
new ImprovedMergeSort(), g+/U^JIc4l
new HeapSort() 6dy4{i
}; FHcqu_;J
z57papo
public static String toString(int algorithm){ -Us% g
return name[algorithm-1]; _>m*`:Wb
} y{?jr$js<
WAa1H60VkS
public static void sort(int[] data, int algorithm) { Mh.eAM8_
impl[algorithm-1].sort(data); s]%!
} ulSTR f
8oH54bFp
public static interface Sort { i8):0
public void sort(int[] data); LXF%~^^@d
} }Z?[Ut
<({eOh5N
public static void swap(int[] data, int i, int j) { %1 ^jd\
int temp = data; }R5&[hxh4t
data = data[j]; @Be:+01z
data[j] = temp; *g41"Cl
} wP':B AQ4U
} *-LU'yM6Yh