[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; $YFn$.70\
} GT`:3L
int i1=l; /SSl$
int i2=mid+1; Hz28L$
for(int cur=l;cur<=r;cur++){ UtY<R
if(i1==mid+1) Ktg6*L/
data[cur]=temp[i2++]; XVE(p3-
else if(i2>r) z9E*Mh(NE
data[cur]=temp[i1++]; E}yl@8g:#
else if(temp[i1] data[cur]=temp[i1++]; 5q@o,d
else ix,5-j
data[cur]=temp[i2++]; :QB Wy
} ig3uY#
} 1NA>W
e>X&[\T
} y1FS?hSD0
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改进后的归并排序: 4,UvTw*2z
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package org.rut.util.algorithm.support; JoIffI?{(D
-k")#1
import org.rut.util.algorithm.SortUtil; cl)%qIXj}H
enE8T3
/** L~CwL
* @author treeroot |Kh#\d
* @since 2006-2-2 e*=N\$
* @version 1.0 ps^Z)x`GV
*/ sYgpK92
public class ImprovedMergeSort implements SortUtil.Sort { PudwcP{
,\xeNUZd
private static final int THRESHOLD = 10; 6E85mfFS
' !ZFK}
/* HS>Z6|uLY
* (non-Javadoc) 2wpLP^9Vr<
* vaS/WEY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) szGp<xv_p
*/ e\tcP
public void sort(int[] data) { mi6<;N2w|
int[] temp=new int[data.length]; cea%M3
mergeSort(data,temp,0,data.length-1); 8?J\
} yIOoVi\m
rt^<=|Z
private void mergeSort(int[] data, int[] temp, int l, int r) { c5nl!0XX
int i, j, k; >a5CW~Z]
int mid = (l + r) / 2; _/]4:("
if (l == r) 4F^(3RKZ|
return; +'x|VPY.PG
if ((mid - l) >= THRESHOLD) ZQZ>{K
mergeSort(data, temp, l, mid); xOp8[6Ga'
else rs`H':a/
insertSort(data, l, mid - l + 1); q!t_qX7u
if ((r - mid) > THRESHOLD) XSkx<"U*
mergeSort(data, temp, mid + 1, r); t,)`Zu$
else ,=.&
insertSort(data, mid + 1, r - mid); R*VJe+5w
m?`U;R[
for (i = l; i <= mid; i++) { ?L|m:A`
temp = data; $i7iv
} gk1I1)p
for (j = 1; j <= r - mid; j++) { YP5V~-O/
temp[r - j + 1] = data[j + mid]; .r[kNh@ b%
} 8fY1~\G:\
int a = temp[l]; [f!sBJ!
int b = temp[r]; \,+act"v
for (i = l, j = r, k = l; k <= r; k++) { Dh*Uv,
if (a < b) { tl !o;`W
data[k] = temp[i++]; ^/h,C^/;
a = temp; 8F9sKRq|rO
} else { c!d>6:\
data[k] = temp[j--]; ]_G!(`Udh
b = temp[j]; TGlIt<&
} rd vq(\A
} lb{<}1YR0o
} M[g9D
cNZuwS~,
/** y 4j0nF
* @param data mQ*:?\@
* @param l /r^J8B*
* @param i A(S=
*/ 7Y"CeU-S
private void insertSort(int[] data, int start, int len) { dj3}Tjt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _3i.o$GO
} xlg6cO
} k z"F4?,
} B{hP#bYK
} ?ey!wcv~
*G"L]Nq#
堆排序： +] s"*'V$
hN=YC\l
package org.rut.util.algorithm.support; 0pYO-@E
2m7Z:b
import org.rut.util.algorithm.SortUtil; .'.#bH9K
cy%JJ)sf
/** _ +q.R
* @author treeroot ;nW#Dn9
* @since 2006-2-2 (U#4j 6Q
* @version 1.0 A%qlB[!:
*/ Dl_y[9
public class HeapSort implements SortUtil.Sort{ )u)]#z
jq#uBU%
/* (non-Javadoc) i"V2=jTeBv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @F%H 1
*/ X458%)G!(K
public void sort(int[] data) { w 4-E@>%
MaxHeap h=new MaxHeap(); G$kspN*"A
h.init(data); 2Z!%Q}Do
for(int i=0;i h.remove(); ,1J+3ugp&
System.arraycopy(h.queue,1,data,0,data.length); vN'Y);$
} ?0QoYA@.$
Z#0hh%E"|y
private static class MaxHeap{ ^LO=&Cq
;j|T#-.
void init(int[] data){ O{:_-eI&d
this.queue=new int[data.length+1]; #z$FxZT<b
for(int i=0;i queue[++size]=data; k<x %
fixUp(size); x=7hOI5u
} >*rH Nf
} [}-CXB
oNH&VHjU
private int size=0; !#s1'x{o
BiI?eT+
private int[] queue; RKB--$ibj
K89 AZxH
public int get() { i]oSVXx4WC
return queue[1]; DG1C_hu i
} & c a-
ozv:$>v@"
public void remove() { vF,\{sgW
SortUtil.swap(queue,1,size--); g|L" |Q
fixDown(1); J}a 8N.S
} 46^LPC"x
file://fixdown DWT4D)C,U
private void fixDown(int k) { OJ0Dw*K<
int j; KFd !wZ@e
while ((j = k << 1) <= size) { 7[aSP5e>T
if (j < size %26amp;%26amp; queue[j] j++; k=L(C^VP
if (queue[k]>queue[j]) file://不用交换 :y#KR\T1
break; 'oNY4.[
SortUtil.swap(queue,j,k); rBG8.E36J
k = j; "uK`!{
} N]qX^RSb
} E{_$C!.
private void fixUp(int k) { &aD]_+b
while (k > 1) { svki=GD_(.
int j = k >> 1; 9nIBs{`/Ac
if (queue[j]>queue[k]) Q(Uj5aX
break; Q?]307g7
SortUtil.swap(queue,j,k); :{2exu
k = j; bj)dYjf
} m E<n=g=
} m<]b]FQ
^}nz^+R
} 96M?tTa
^3`CP4DT
} m#y?k1GY
7/^`y')
SortUtil： %*d(1?\o
z=q
package org.rut.util.algorithm; ODE9@]a
@#sBom+K`
import org.rut.util.algorithm.support.BubbleSort; Sg$14B
import org.rut.util.algorithm.support.HeapSort; ?Uz7($}
import org.rut.util.algorithm.support.ImprovedMergeSort; pC9Ed9uRK
import org.rut.util.algorithm.support.ImprovedQuickSort; %) A-zzj
import org.rut.util.algorithm.support.InsertSort; '&_<!Nv3
import org.rut.util.algorithm.support.MergeSort; \g|u|Y.2[
import org.rut.util.algorithm.support.QuickSort; MN|8(f5Gs
import org.rut.util.algorithm.support.SelectionSort; 8GC(?#Kb
import org.rut.util.algorithm.support.ShellSort; ("HT0&#a
f#9DU}2m
/** %DJxUuh
* @author treeroot TMsEHd
* @since 2006-2-2 $O|J8;"v
* @version 1.0 ~4p@m>>
*/ \A-w,]9^V
public class SortUtil { Mq7d*Bgb
public final static int INSERT = 1; "+^d.13+]
public final static int BUBBLE = 2; C`|'+
public final static int SELECTION = 3; Gx75EQ2
public final static int SHELL = 4; ;dq AmBG{8
public final static int QUICK = 5; )KvQaC
public final static int IMPROVED_QUICK = 6; "DV.%7*^
public final static int MERGE = 7; r{~K8!=oU]
public final static int IMPROVED_MERGE = 8; ^s'ozCk 0
public final static int HEAP = 9; XWo=?(iA
%dXfC!
public static void sort(int[] data) { wg?:jK
sort(data, IMPROVED_QUICK); .F=15A
} WZ"g:Khw
private static String[] name={ aOYRenqu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IyE9G:fY
}; $;<h<#_n;
; *G[3kk
private static Sort[] impl=new Sort[]{ m4:b?[
new InsertSort(), F8 4LMk?U
new BubbleSort(), :z=/z!5:j
new SelectionSort(), c9e }P
new ShellSort(), dOY+| P\
new QuickSort(), h[d|y_)f
new ImprovedQuickSort(), IQK__)
new MergeSort(), D_E^%Ea&`
new ImprovedMergeSort(), 64s9Dy@%F
new HeapSort() NJ-cP m
}; uQ9/7"S
}-{l(8-
public static String toString(int algorithm){ =dbLA ,z9
return name[algorithm-1]; 9\W~5J<7
} 45`Gv
5gq3 >qo
public static void sort(int[] data, int algorithm) { {rr ED
impl[algorithm-1].sort(data); 7M:0%n$
} \$J!B&i
VHsNz WI
public static interface Sort { %^RlE@l9
public void sort(int[] data); r]1|I6:&)
} (bo{vX
hB:R8Y^?H
public static void swap(int[] data, int i, int j) { Fs:l"5~>1
int temp = data; ff"Clp
data = data[j]; zqAK|jbL
data[j] = temp; ;2RCgX!'%
} Nzc1)t=
} n?@o:c5,r