[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; &'/PEOu&}G
} 3zfiegY@wm
int i1=l; ~3Qa-s;g
int i2=mid+1; leSBR,C
for(int cur=l;cur<=r;cur++){ /'VuMMJ2
if(i1==mid+1) 1bw$$QXC_
data[cur]=temp[i2++]; =kq<J-:#R
else if(i2>r) beYGP
data[cur]=temp[i1++]; ,=@WE>ip
else if(temp[i1] data[cur]=temp[i1++]; d8 v9[4
else V$$9Rh
data[cur]=temp[i2++]; 1=>b\"P#E
} k'F*uS
} \(^]R,~*!b
VJ&-Z |
} 9.~_swkv
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改进后的归并排序: 0RCp
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package org.rut.util.algorithm.support; &Nr+-$
1p/_U?H:|
import org.rut.util.algorithm.SortUtil; d"3x11|
{=!BzNMj
/** N7 _rVcDe
* @author treeroot SFP?ND+7
* @since 2006-2-2 *fyaAv
* @version 1.0 ,5~C($-t
*/ bFA lC
public class ImprovedMergeSort implements SortUtil.Sort { y~t e!C
"f3mi[
private static final int THRESHOLD = 10; f@Ve,i
h{~GzrL*
/* NN:zQ_RT
* (non-Javadoc) D7thLqA
* ei]Q<vT6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VJr~h "[
*/ wB[ JFy"E
public void sort(int[] data) { "K|':3n|
int[] temp=new int[data.length]; #{)mr [c|
mergeSort(data,temp,0,data.length-1); o {q8An)
} %6V=G5+W
KeyHxU=?
private void mergeSort(int[] data, int[] temp, int l, int r) { D iHj!tZN
int i, j, k; eXLdb-
int mid = (l + r) / 2; 5Tidb$L;Du
if (l == r) fo9V&NE
return; `J{{E,y @
if ((mid - l) >= THRESHOLD) h,fahbH-
mergeSort(data, temp, l, mid); :Xx7':5
else -=u9>S)!c
insertSort(data, l, mid - l + 1); #H8QX5b)
if ((r - mid) > THRESHOLD) YAi@EvzCVy
mergeSort(data, temp, mid + 1, r); JV2[jo}0N
else PI*Z>VE?
insertSort(data, mid + 1, r - mid); MpJ3*$Dr
E%f!SD
for (i = l; i <= mid; i++) { $S/WAw,/
temp = data; b!EqYT
} 0*uJS`se6Z
for (j = 1; j <= r - mid; j++) { M|.ykA<D
temp[r - j + 1] = data[j + mid]; PIsXX#`7;
} 4!M0)Nix
int a = temp[l]; `RqV\ 6G+
int b = temp[r]; 0V2~
for (i = l, j = r, k = l; k <= r; k++) { p+2%LYR u
if (a < b) { z`dnS]q9
data[k] = temp[i++]; :`@W`V?6-
a = temp; W3MH8z
} else { V<n#%!M5gV
data[k] = temp[j--]; JJ_KfnH
b = temp[j]; <V8=*n"mR
} qV$0 ";d
} %we! J%'Y]
} 4J[csU
PXDJ[Oj7(0
/** Qeq=4Nq
* @param data RHt~:D3*
* @param l BJZGQrsz
* @param i eTtiAF=bW
*/ p|)j{nc
private void insertSort(int[] data, int start, int len) { gF~ }
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0}Qd
} fAT M?
} |'L$ogt6
} 'EU|w,GL}
} HhTD/
iSMVV<7
堆排序： B@vup {Kg
!ZN"(0#qz
package org.rut.util.algorithm.support; +ldgT"
3"6-X_
import org.rut.util.algorithm.SortUtil; R <u\ -
Xpmi(~n
/** OZl0I#@A
* @author treeroot !8J%%Ux&M
* @since 2006-2-2 x Sv@K5"8!
* @version 1.0 MWn[]'TpH
*/ =vKSvQP@)
public class HeapSort implements SortUtil.Sort{ ?d)eri8,
YQ}IE[J}v
/* (non-Javadoc) dM5N1$1,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QnH~' k
*/ I9cZZ`vs
public void sort(int[] data) { ~0{F,R.$
MaxHeap h=new MaxHeap(); vqwSOh|P9
h.init(data); #X<s_.7DJ
for(int i=0;i h.remove(); `]l[p+DO
System.arraycopy(h.queue,1,data,0,data.length); {/qq*0wa
} 9q<?xO
pH.&OW%
private static class MaxHeap{ I}/-zyx>=
Zu^J X/um
void init(int[] data){ EMS$?"K
this.queue=new int[data.length+1]; Y&*nj`n
for(int i=0;i queue[++size]=data; ]~m2#g%
fixUp(size); Ktf lbI!
} gG46hO-M%x
} z Q11dLjs
.\AbE*lZ#
private int size=0; H:L<gv(rG
=q*j". <
private int[] queue; v6KF0mqA&
*5S~@
public int get() { nx`I9j\
return queue[1]; q6N6QI8/
} 'Y-Y By :
kT{d pGU9
public void remove() { cpBTi
SortUtil.swap(queue,1,size--); Lc13PTz>>g
fixDown(1); oyo V1jO
} Z|$OPMLX
file://fixdown }JBLzk5|
private void fixDown(int k) { h-RL`X
int j; +# tmsv]2
while ((j = k << 1) <= size) { #ZpR.$`k
if (j < size %26amp;%26amp; queue[j] j++; 7-MkfWH2b6
if (queue[k]>queue[j]) file://不用交换 AU^5N3%j
break; dy2<b+..
SortUtil.swap(queue,j,k); SH M@H93
k = j; $r=tOD4;
} /%T d(
} $"x~p1P
private void fixUp(int k) { =!|=Y@
while (k > 1) { $"]*,=-X
int j = k >> 1; 5KDN8pJN
if (queue[j]>queue[k]) "\M^jO
break; S-KHot ?
SortUtil.swap(queue,j,k); >-Q=o,cl%3
k = j; A"~4|`W
} "~/O>.p
} $23dcC*hI
$|bdeQPr\
} :Z5Twb3h
xc6A&b>jI
} 5\eM3w'd
; )J\k2
SortUtil： ;B!u=_'
YA%0{Tdxz
package org.rut.util.algorithm; Vi_6O;
ww$Ec
import org.rut.util.algorithm.support.BubbleSort; ua>YI
import org.rut.util.algorithm.support.HeapSort; _G=k^f_
import org.rut.util.algorithm.support.ImprovedMergeSort; H^C$2f
import org.rut.util.algorithm.support.ImprovedQuickSort; u~q6?*5
import org.rut.util.algorithm.support.InsertSort; E*X-f"
import org.rut.util.algorithm.support.MergeSort; U/3<p8
import org.rut.util.algorithm.support.QuickSort; El#"vIg(\
import org.rut.util.algorithm.support.SelectionSort; 3Ja1|;(2
import org.rut.util.algorithm.support.ShellSort; zsuXN*
Dk`(Wgk2
/** r:Rk!z*
* @author treeroot }:a:E~5y
* @since 2006-2-2 8[xl3=
* @version 1.0 8xN+LL'T{
*/ @Lf-=9
public class SortUtil { ?."YP[;
public final static int INSERT = 1; %#$K P
public final static int BUBBLE = 2; \RDS~u\d
public final static int SELECTION = 3; j0+l-]F-
public final static int SHELL = 4; 8Xjp5
public final static int QUICK = 5; XdxSi"+
public final static int IMPROVED_QUICK = 6; _?QVc0S!
public final static int MERGE = 7; M=Cl|
public final static int IMPROVED_MERGE = 8; =/SBZLR(9
public final static int HEAP = 9; ]XhX aoqL
wY6m^g$h3
public static void sort(int[] data) { 38l 8n.
sort(data, IMPROVED_QUICK); kx31g,cf]w
} 'sT7t&v~
private static String[] name={ FEwPLViso
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;"Q.c#pA$g
}; oK#UEn
f*46,`x
private static Sort[] impl=new Sort[]{ %UokR"
new InsertSort(), 1E]TH/JK
new BubbleSort(), * faG0le
new SelectionSort(), S5>?jn1
new ShellSort(), ft><Ql3
new QuickSort(), f )Ef-o
new ImprovedQuickSort(), KO3X)D<3
new MergeSort(), urK~]68
new ImprovedMergeSort(), AMf{E
new HeapSort() Z(:q.{"r
}; ]CxDm
-fCR^`UOS
public static String toString(int algorithm){ 6Mh"{N7
return name[algorithm-1]; #Q'j^y7=z
} V18A|]k
f6k=ew
public static void sort(int[] data, int algorithm) { hYB3tT
impl[algorithm-1].sort(data); &.1qixXIr
} N/6!|F
^Cy=L]
public static interface Sort { s@D/.X
public void sort(int[] data); uyDPWnYk
} @P@{%I
:`>bh
public static void swap(int[] data, int i, int j) { BHNEP |=
int temp = data; 7tQ?av
data = data[j]; DA_}pS"
data[j] = temp; c$^~7.~{Qy
} '|J~2rbyr
} *w$3/