[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; \>=YxB q
} 4_.k Q"'DH
int i1=l; G0s:Dum
int i2=mid+1; IPxfjBC+J
for(int cur=l;cur<=r;cur++){ ^/n[5@6H
if(i1==mid+1) ^YIOS]d>8#
data[cur]=temp[i2++]; Bhq(bV
else if(i2>r) ,t+ATaOF
data[cur]=temp[i1++]; peqFa._W
else if(temp[i1] data[cur]=temp[i1++]; pO+1?c43
else ^LU[{HZV
data[cur]=temp[i2++]; *VlYl"
} (Z"Xp{u
} :s'%IGy>:
Na~_=3+a
} Fcr@Un'
j=AJs<
改进后的归并排序: G>RYQ{O
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package org.rut.util.algorithm.support; Awh"SUOh0
\~)573'
import org.rut.util.algorithm.SortUtil; Ez$5wY^J
<@vE3v;
/** #wjBMR%
* @author treeroot Ys_YjlMIbl
* @since 2006-2-2 Gj^bz'2
* @version 1.0 _uu:)%
*/ $Tur"_`I;
public class ImprovedMergeSort implements SortUtil.Sort { VDPN1+1*
*(scSC>
private static final int THRESHOLD = 10; v4zd x)
ZkIQ-;wx
/* m5p~>]}fYF
* (non-Javadoc) ;Pa(nUE@
* OWjZ)f/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $"FdS,*qKl
*/ W^N"y&
public void sort(int[] data) { YiCDV(prT
int[] temp=new int[data.length]; 1%@~J\qF
mergeSort(data,temp,0,data.length-1); LXfiSM{o
} JgB# EoF
l =yHx\
private void mergeSort(int[] data, int[] temp, int l, int r) { %KA/
int i, j, k; C#~MR+;
int mid = (l + r) / 2; (6BCFl:/Q<
if (l == r) g=C<E2'i*
return; Xu_<4
if ((mid - l) >= THRESHOLD) 6\3k0z
mergeSort(data, temp, l, mid); K*Jtyy}r
else QRlzGRueR&
insertSort(data, l, mid - l + 1); 2f!oA~|2
if ((r - mid) > THRESHOLD) lz(,;I'x
mergeSort(data, temp, mid + 1, r); re!8nuBsA
else DH !Br
insertSort(data, mid + 1, r - mid); >u)ZT
^JtHTLHL=
for (i = l; i <= mid; i++) { I{zE73
temp = data; 'u[o`31.
} ?i~/gjp
for (j = 1; j <= r - mid; j++) { f4S@lyYF
temp[r - j + 1] = data[j + mid]; uC(S`Q[Bg
} 2]9<%-=S
int a = temp[l]; *?D2gaCta
int b = temp[r]; 5uo(z,WLR
for (i = l, j = r, k = l; k <= r; k++) { y.:-
if (a < b) { h!K2F~i{P
data[k] = temp[i++]; AfN
a = temp; ]7t\%_
} else { qm=F6*@}
data[k] = temp[j--]; -^H5z+"^
b = temp[j]; z8|9WZ:
} f*vk1dS:*3
} _CJr6Evs
} A9UaLSe
{H;|G0tR
/** /JeqoM"x
* @param data -Y=c g;
* @param l 9!HMQ
* @param i +Nbk\%
*/ 0^.4eX:E_
private void insertSort(int[] data, int start, int len) { zXPJ;^Xxa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'lsq3!d.
} $a*Q).^
} ^Pg YP
} pt%~,M _
} 7]xz8t
sq(Ar(L<
堆排序： >?W;>EUH
_K}_h\e.
package org.rut.util.algorithm.support; OO\biYh o
p5;,/ |Ft
import org.rut.util.algorithm.SortUtil; RrU~"P1C
y8*@dRrq
/** K'5sn|)
* @author treeroot @VC9gdO/
* @since 2006-2-2 B%rr}Ro1e
* @version 1.0 8pL>wL &C
*/ hW!@$Ph
public class HeapSort implements SortUtil.Sort{ @z$pPo0fW
&Wv`AoV
/* (non-Javadoc) 4R*<WdT(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kYA'PW/[)
*/ YNgR1:l
public void sort(int[] data) { _ U8OIXN
MaxHeap h=new MaxHeap(); `k{ff
h.init(data); @t;O"q'|
for(int i=0;i h.remove(); {uwk[f{z
System.arraycopy(h.queue,1,data,0,data.length); J'&B:PZObB
} t`8e#n 9
=O3I[
private static class MaxHeap{ ^I'Lw
AYPf)K;%
void init(int[] data){ 'tV"^KQHI
this.queue=new int[data.length+1]; $-fjrQ
for(int i=0;i queue[++size]=data; M~z(a3@[V
fixUp(size); 4-d99|mv
} ,LW(mdIe(
} HzG~I8o(d
DNm7z[t{
private int size=0; Yn$>QS 4
iUxDEt[t*
private int[] queue; lN)Y
VO @ 4A6
public int get() { C:s^s
return queue[1]; Wp7@
} :@QK}qFP
anz9lGG#
public void remove() { M\y~0uZ
SortUtil.swap(queue,1,size--); *fQ?A|l!x
fixDown(1); a_ 9|xI
} 3lLW'g&=
file://fixdown GLaZN4`
private void fixDown(int k) { \~z?PA.$
int j; %2Xus9;k#
while ((j = k << 1) <= size) { 0gv3v@QO
if (j < size %26amp;%26amp; queue[j] j++; c#\ah}]Vo
if (queue[k]>queue[j]) file://不用交换 M!&_qj&N,
break; eN<>#:`
SortUtil.swap(queue,j,k); XQ0#0<
k = j; kwDh|K
} 'B:Z=0{>N
} r&%gjqt
private void fixUp(int k) { teq^xTUF[
while (k > 1) { _XY`UZ
int j = k >> 1; 0$xK
if (queue[j]>queue[k]) 5T$9'5V7
break; xUiWiOihr6
SortUtil.swap(queue,j,k); #sz]PZ\
k = j; 9atjK4+o
} g{g`YvLu^
} + AcKB82
QQ^Gd8nQ
} G8^0^@o
K;<NBnH
} ShL1'Z}^{
3iu!6lC
SortUtil： m%e^&N#%6r
A0cM(w{7_
package org.rut.util.algorithm; ffmG~$Yh_
XPHQAo[(s
import org.rut.util.algorithm.support.BubbleSort; @!z$Sp=
import org.rut.util.algorithm.support.HeapSort; +8LM~voB
import org.rut.util.algorithm.support.ImprovedMergeSort; Nk lz_]
import org.rut.util.algorithm.support.ImprovedQuickSort; #d}0}7ue
import org.rut.util.algorithm.support.InsertSort; nwa\Lrh
import org.rut.util.algorithm.support.MergeSort; c[(yU#@
import org.rut.util.algorithm.support.QuickSort; &ui:DZAxj|
import org.rut.util.algorithm.support.SelectionSort; MxM](ew~7
import org.rut.util.algorithm.support.ShellSort; 8yHq7=
:[y]p7;{f
/** :`:xP
* @author treeroot #5'c\\?Q
* @since 2006-2-2 ,bB( 24LD
* @version 1.0 (\Rwf}gyR
*/ *0=fT}&!
public class SortUtil { >]>0KQfO
public final static int INSERT = 1; *hv=~A $q
public final static int BUBBLE = 2; 2-B6IPeI
public final static int SELECTION = 3; Oq #o1>
public final static int SHELL = 4; 5Z* b(R
public final static int QUICK = 5; jK3giT
public final static int IMPROVED_QUICK = 6; Qy4X#wgD
public final static int MERGE = 7; Wr]O
public final static int IMPROVED_MERGE = 8; Na\3.:]z
public final static int HEAP = 9; X}3P1.n:
_L$)2sl1R
public static void sort(int[] data) { 2~vo+ng
sort(data, IMPROVED_QUICK); eeZIa`.sX
} i?ZA x4D
private static String[] name={ 6{5q@9F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W\HLal
}; ^$e0t;W=
+2- qlU
private static Sort[] impl=new Sort[]{ v2IEJ
new InsertSort(), ?g5iok {
new BubbleSort(), V]r hr
new SelectionSort(), P;j&kuW|zL
new ShellSort(), pNP_f:A|
new QuickSort(), EY So=
new ImprovedQuickSort(), r])Z9bbi
new MergeSort(), 3 t/ R2M
new ImprovedMergeSort(), x:p}w[WM
new HeapSort() DYc.to-
}; OWqrD@
NPS.6qY
public static String toString(int algorithm){ iOl%-Y
return name[algorithm-1]; D)y{{g*Lnm
} g8KY`MBnC&
>J.Qm0TY(
public static void sort(int[] data, int algorithm) { Dh2#$[/@1
impl[algorithm-1].sort(data); nHnk#SAAu
} Y=9qJ`q
hXNH"0VCV
public static interface Sort { itw{;j
public void sort(int[] data); `Uv)Sf{
} ;8BA~,4l
]\7lbLv
public static void swap(int[] data, int i, int j) { #hpIyy%n
int temp = data; `N$!s7M
data = data[j]; z*RSMfRW
data[j] = temp; AfN&n= d K
} :VJV5f{
} 8[oYZrg