[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; nEzf.[+9/
} mw_Ew]&
int i1=l; *5bLe'^\|K
int i2=mid+1; Y_`-9'&
for(int cur=l;cur<=r;cur++){ N@B9 @8h
if(i1==mid+1) R.7:3h
data[cur]=temp[i2++]; [m^+,%m5]
else if(i2>r) Cg*H.f%Mr
data[cur]=temp[i1++]; y@CHR
else if(temp[i1] data[cur]=temp[i1++]; B?VhIP e
else sLE#q+W
data[cur]=temp[i2++]; 2r$#m*
} IwGqf.!.>
} NM)k/?fA
H>r!i4l
} 3_JCU05H}
^Rm
改进后的归并排序: No2b"G@
!lo/xQ<
package org.rut.util.algorithm.support; 6c0>gUQx-
CJ}5T]WZ
import org.rut.util.algorithm.SortUtil; @FdSFQ/9
#plY\0E@
/** ~>9_(L
* @author treeroot q2HYiH^L
* @since 2006-2-2 4k./(f2+
* @version 1.0 RN=` -*E1
*/ U%0Ty|$Y
public class ImprovedMergeSort implements SortUtil.Sort { gGfoO[B
8Sz})UZ
private static final int THRESHOLD = 10; Spt?>sm
Y8flrM2CwG
/* J>d.dq>r
* (non-Javadoc) O-)-YVU
* " RxP^l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0!v->Dk
*/ 1;<R#>&,*
public void sort(int[] data) { x@8a''
int[] temp=new int[data.length]; KZ~*Nz+H2
mergeSort(data,temp,0,data.length-1); R$zH]
} 6q 2_WX
-G6U$
private void mergeSort(int[] data, int[] temp, int l, int r) { hy|b6wF&
int i, j, k; `est|C '+
int mid = (l + r) / 2; }i!J/tJ)b
if (l == r) Z|}G6]h
return; $XoQ]}"O
if ((mid - l) >= THRESHOLD) o M Zq+>
mergeSort(data, temp, l, mid); U`hY{E;
else !?Wp+e6
insertSort(data, l, mid - l + 1); }@.|?2b +
if ((r - mid) > THRESHOLD) FLEo*9u>b
mergeSort(data, temp, mid + 1, r); Sna4wkbS
else }1IpON
insertSort(data, mid + 1, r - mid); `({T]@]V
LR"9D
for (i = l; i <= mid; i++) { YuB+k^
temp = data; S*yjee<@
} BT}&Y6
for (j = 1; j <= r - mid; j++) { qWw\_S
temp[r - j + 1] = data[j + mid]; $AHQmyg<
} EqI(|bFwy
int a = temp[l]; =-p$jXVW%
int b = temp[r]; 7g_]mG[6
for (i = l, j = r, k = l; k <= r; k++) { 'uy/o)L
if (a < b) { w&ak"GgV
data[k] = temp[i++]; O*#*%RL|
a = temp; vTn}*d.K=
} else { iYC9eEF
data[k] = temp[j--]; \l~*PG2
b = temp[j]; 47J5oPT2'
} $\9~)Rq6
} 8V~vXnkM
} T Q,?>6n
4*$G & TX
/** e1P"[|9>R
* @param data 7g3>jh
* @param l ;J7F J3n
* @param i {z|;Xi::"
*/ .`&F>o(A
private void insertSort(int[] data, int start, int len) { 5ZBKRu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H/}]FmjN
} NVRLrJWpp
} *?MGMhE
} fDLG>rXPT
} =FD;~
Ha)ANAD
堆排序： :,)lm.}]t
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package org.rut.util.algorithm.support; "jw<V,,
4bgqg0z>
import org.rut.util.algorithm.SortUtil; G}p\8Q}'
={u0_j W
/** 6^DR0sO
* @author treeroot q:g2Zc'Y~W
* @since 2006-2-2 i&n'N8D@
* @version 1.0 /t(C>$ }p
*/ mx=BD'
public class HeapSort implements SortUtil.Sort{ vhhC> 7
h yv2SxP*
/* (non-Javadoc) %Rsp;1Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sf8{h|71
*/ `jOX6_z?I
public void sort(int[] data) { 71l%MH
MaxHeap h=new MaxHeap(); TiH)5
h.init(data); `/_G$_
for(int i=0;i h.remove(); 4ni3kmvX
System.arraycopy(h.queue,1,data,0,data.length); A%^ILyU6c
} x,'!eCKN
z<5m fAm
private static class MaxHeap{ =Qn ;_+Ct
aCL!]4K84$
void init(int[] data){ jq!tT%o*B
this.queue=new int[data.length+1]; SCTA=l.
for(int i=0;i queue[++size]=data; K^R,Iu/M
fixUp(size); @$z<i `4
} 'PP#^aI,
} ^4o;$u4R
(IPY^>h
private int size=0; PsZ >P|e1
O]m+u
private int[] queue; 'g{9@PkGn
Ox-|JJ=
public int get() { jQ)T67
return queue[1]; Mec5h}^
} /:FOPPs
.c$316
public void remove() { }-@`9(o`)
SortUtil.swap(queue,1,size--); iya"ky~H
fixDown(1); =yy5D$\
} 9`9R!=NM
file://fixdown h*<P$t
private void fixDown(int k) { wKsT7c'
int j; C/-63O_
while ((j = k << 1) <= size) { [VWUqlNt>
if (j < size %26amp;%26amp; queue[j] j++; uDZT_c'Y
if (queue[k]>queue[j]) file://不用交换 y TDNNK
break; Kde9 $
SortUtil.swap(queue,j,k); RH|XxH*
k = j; 3Gip<\$v
} b2FO$Os
} _H/8_[xk
private void fixUp(int k) { ?)#5X_V-q
while (k > 1) { mbueP.q[?
int j = k >> 1; >&U,co$>
if (queue[j]>queue[k]) H8On<C=
break; Z@$8I{}G
SortUtil.swap(queue,j,k); l(#)WWr+
k = j; dYgXtl=#j
} fX|Y;S-@+
} >_LDMs[-p
Tq4-wE+
} W='>:H
%x} O1yV
} &kpwo )
STaA]i}P
SortUtil： J:\|Nc?
[r[=W!
package org.rut.util.algorithm; 0xXC^jx:
;I!MLI
import org.rut.util.algorithm.support.BubbleSort; eET}r24
import org.rut.util.algorithm.support.HeapSort; >MvDVPi~+
import org.rut.util.algorithm.support.ImprovedMergeSort; v 7x:dcV
import org.rut.util.algorithm.support.ImprovedQuickSort; N~xLu8,
import org.rut.util.algorithm.support.InsertSort; $81*^
import org.rut.util.algorithm.support.MergeSort; )d>!"JB-
import org.rut.util.algorithm.support.QuickSort; L:'J Bhg
import org.rut.util.algorithm.support.SelectionSort; 5hy""i
import org.rut.util.algorithm.support.ShellSort; J`^I./
,xxR\}
/** D N*t~Z3[
* @author treeroot eh5gjSqx
* @since 2006-2-2 _Wa.JUbv
* @version 1.0 (/j); oSK
*/ ^R@j=_8}
public class SortUtil { !U~WK$BP
public final static int INSERT = 1; 2]ape !(
public final static int BUBBLE = 2; >cCR2j,r
public final static int SELECTION = 3; go<W( ,O
public final static int SHELL = 4; ]]wA[c~G
public final static int QUICK = 5; }B.H|*uO
public final static int IMPROVED_QUICK = 6; |a!fhl+
public final static int MERGE = 7; v*[.a#1^
public final static int IMPROVED_MERGE = 8; AD<q%pu&H?
public final static int HEAP = 9; X<%Q"2hW
x HhN
public static void sort(int[] data) { ;{%\9nS
sort(data, IMPROVED_QUICK); {b
} _\GC(
private static String[] name={ =Fr(9(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E0?iXSJ
}; ])!o5`ltZ
ut I"\1hQ
private static Sort[] impl=new Sort[]{ Aj4T"^fv
new InsertSort(), gE?|_x#
new BubbleSort(), ?n ZY)
new SelectionSort(), d|yAs5@
new ShellSort(), jE/AA!DC#
new QuickSort(), }-sdov<<
new ImprovedQuickSort(), jYhB +|
new MergeSort(), jWE:ek*
new ImprovedMergeSort(), TTTPxO,
new HeapSort() & J2M1z%
}; cu/5$m?xx
9BuSN*4
public static String toString(int algorithm){ /Dj=iBO
return name[algorithm-1]; 8!Ww J Oe
} 7F{3*`/6
'5|h)Q5
public static void sort(int[] data, int algorithm) { `p;I}
impl[algorithm-1].sort(data); 9Q+'n$s0^
} jyZWVL:_
9AJ7h9L
public static interface Sort { >\Ww;1yV
public void sort(int[] data); c>)Yt^q&K
} d>t<_}
D 'Zt
public static void swap(int[] data, int i, int j) { AQ[GO6$,%H
int temp = data; G8Y<1%`<
data = data[j]; % V8U(z
data[j] = temp; #Ibp(
} lH6OcD:kj
} +P`*kj-P\