[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; ^,ZvKA"}+/
} ya*q;D
int i1=l; btB(n<G2#
int i2=mid+1; !)51v {
for(int cur=l;cur<=r;cur++){ W~+!"^<n
if(i1==mid+1) g[D,\
data[cur]=temp[i2++]; zn?a|kt
else if(i2>r) '%eaK_+7
data[cur]=temp[i1++]; LNyL>VHkK
else if(temp[i1] data[cur]=temp[i1++]; ~NxoF
else h!t2H6eyF
data[cur]=temp[i2++]; -67f33
} {_k!!p6
} 7Da^Jv k
Tg{dIh.Q~O
} n)wpxR
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改进后的归并排序: kHo;9j-U
o}AqNw60v
package org.rut.util.algorithm.support; RL]lt0O{
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import org.rut.util.algorithm.SortUtil; ek0;8Ds9
644hQW&W
/** AIRVvW~($
* @author treeroot zvQ^f@lq2
* @since 2006-2-2 +2k|g2
* @version 1.0 D.oS8'
*/ R(7X}*@X
public class ImprovedMergeSort implements SortUtil.Sort { !~$YD*"S
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private static final int THRESHOLD = 10; Yf2+@E
7K5o" "
/* )lngef /D_
* (non-Javadoc) WSpg(\Cs
* (>Q9jNW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'k(~XA}X:
*/ Q+%m+ /Zq
public void sort(int[] data) { aBA#\eV
int[] temp=new int[data.length]; GO:1 Z?^
mergeSort(data,temp,0,data.length-1); J?,!1V=
} ,[K)E
o"+&^
private void mergeSort(int[] data, int[] temp, int l, int r) { 7gR;
int i, j, k; `$x#_-Hn
int mid = (l + r) / 2; |2t7mat
if (l == r) qeO6}A"^|
return; %Cbc@=k
if ((mid - l) >= THRESHOLD) uK&wS#uY
mergeSort(data, temp, l, mid); kvO`]>#;$?
else p6eDd"Y
insertSort(data, l, mid - l + 1); c402pj
if ((r - mid) > THRESHOLD) oe_[h]Hgl
mergeSort(data, temp, mid + 1, r); 5KPPZmO
else ;(iUY/ h[h
insertSort(data, mid + 1, r - mid); ^$s~qQQ}B
Iz$W3#hi
for (i = l; i <= mid; i++) { J'Mgj$T $
temp = data; 5)zh@aJ@
} IkXKt8`YVA
for (j = 1; j <= r - mid; j++) { |EEz>ci
temp[r - j + 1] = data[j + mid]; S bqM=I+
} p~zTRnm
int a = temp[l]; a518N*]j
int b = temp[r]; uL2{v
for (i = l, j = r, k = l; k <= r; k++) { Vwh&^{Eh
if (a < b) { (9[C0eS
data[k] = temp[i++]; G>{:D'#
a = temp; p$!+2=)gY
} else { s"Pk-Dv
data[k] = temp[j--]; i\R\bv[9
b = temp[j]; Ai_|)
} q!h*3mNm
} )b2E/G@X&
} hu*>B
%IH|zSr)EM
/** 9oau_Q#
* @param data )1yUV*6
* @param l ujHzG}2z
* @param i ZtK%b+MBP
*/ .gsu_N_v
private void insertSort(int[] data, int start, int len) { KL\=:iWA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $=g.-F%*=
} rxK[CDM,
} d~f0]O
} 9qO:K79|
} BMsy}08dQ
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堆排序： MVU'GHv
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package org.rut.util.algorithm.support; Ue\oIi
2dJ)4
import org.rut.util.algorithm.SortUtil; `r0 qn'*
n7!Lwq2
/** lJQl$Wx^
* @author treeroot 7)It1i-
* @since 2006-2-2 \U =>
* @version 1.0 28qWC~/9
*/ 8P y_Y>
public class HeapSort implements SortUtil.Sort{ DdZ_2B2
`YU:kj<6
/* (non-Javadoc) &#\7w85$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5}^08Xl
*/ L5|;VH
public void sort(int[] data) { 5N</Z6f'o
MaxHeap h=new MaxHeap(); ScmzbDu
h.init(data); +O:pZz
for(int i=0;i h.remove(); +#"Ic:
System.arraycopy(h.queue,1,data,0,data.length); P##(V!YR
} ?|rw=%
Gg,k
private static class MaxHeap{ T`0gtSS
*E q7r>[
void init(int[] data){ 3K]0sr
this.queue=new int[data.length+1]; WD`{kqc
for(int i=0;i queue[++size]=data; GM56xZ!2T
fixUp(size); ~=gH7V
} szs3x-g
} #Lt+6sa]2@
-hV KPIb
private int size=0; *ww(5 t
FrM~6A_
private int[] queue; cx%9UK*c
-r0\
public int get() { 'Bn_'w~j{
return queue[1]; qBrZg
} y(BLin!O.
l{x#*~ga
public void remove() { BQmafpp`
SortUtil.swap(queue,1,size--); .Eyk?"^
fixDown(1); HSFf&|qqx
} gG>^h1_o~
file://fixdown ?PtRb:RHt
private void fixDown(int k) { !{aA*E{
int j; 3$f5][+U
while ((j = k << 1) <= size) { /'^>-!8_1
if (j < size %26amp;%26amp; queue[j] j++; tl#s:
if (queue[k]>queue[j]) file://不用交换 6y!?xot
break; L. ?dI82c
SortUtil.swap(queue,j,k); gx R|S
k = j; W 9MZ
} m&c(N
} Olh-(u:9+O
private void fixUp(int k) { mK&9p{4#U
while (k > 1) { l'8wPmy%N
int j = k >> 1; i_^NbC
if (queue[j]>queue[k]) I`>%2mP[C
break; D??/=`|8
SortUtil.swap(queue,j,k); dp W%LXM_
k = j; ;XuEMq,Di
} n,LKkOG
} ]KT,s].
[:'?}p
} \`5u@Nzx
J~`%Nj5>
} $F$R4?_
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SortUtil： }r<^]Q*&p
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package org.rut.util.algorithm; !9OgA
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import org.rut.util.algorithm.support.BubbleSort; -{mq\GvGn
import org.rut.util.algorithm.support.HeapSort; nit7|T@^
import org.rut.util.algorithm.support.ImprovedMergeSort; *dgNpJ 9
import org.rut.util.algorithm.support.ImprovedQuickSort; |.W;vc<
import org.rut.util.algorithm.support.InsertSort; l[{}ZKZ
import org.rut.util.algorithm.support.MergeSort; bncFrzp#o
import org.rut.util.algorithm.support.QuickSort; ="E V@H?U
import org.rut.util.algorithm.support.SelectionSort; (ZsR=:9(
import org.rut.util.algorithm.support.ShellSort; HKw4}FC*
a$&6a
/** o:*iT=l
* @author treeroot ixpG[8s
* @since 2006-2-2 Lxrn#Z eM
* @version 1.0 2 -8:qmP(
*/ fbkjK`_q
public class SortUtil { "b7C0NE
public final static int INSERT = 1; IV*$U7~
public final static int BUBBLE = 2; b;ZAz
public final static int SELECTION = 3; nP5fh_/
public final static int SHELL = 4; 1OS3Gv8jc~
public final static int QUICK = 5; POs~xaZ`H
public final static int IMPROVED_QUICK = 6; %W@IB8]Vr
public final static int MERGE = 7; nmrk-#._@9
public final static int IMPROVED_MERGE = 8; 8iA(:Tb
public final static int HEAP = 9; 9hpM*wt
YJsi5
public static void sort(int[] data) { RjHpC7b*%
sort(data, IMPROVED_QUICK); Jx?>1q=M
} #C}(7{Vt
private static String[] name={ 7?#32B Gr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 54%}JA][
}; JFdzA
hKYPH?b%
private static Sort[] impl=new Sort[]{ I%xJ)fIK
new InsertSort(), IBsn>*ja<
new BubbleSort(), C =U4|h~W
new SelectionSort(), KHiJOeLc
new ShellSort(), CgE5;O
new QuickSort(), zf u78
new ImprovedQuickSort(), Gjr2]t;E
new MergeSort(), Z8UM0B=i
new ImprovedMergeSort(), -C<aB750O)
new HeapSort() Wno5B/V
}; 5!*a,$S
q>X2=&1
public static String toString(int algorithm){ Y.#+Yh[
return name[algorithm-1]; E3.s8}}
} 2_v>8B
:"]ei@
public static void sort(int[] data, int algorithm) { LcF3P 4
impl[algorithm-1].sort(data); :LG%8Z{R
} !CKUkoX
h65j,v6B
public static interface Sort { rg.if"o
public void sort(int[] data); pXa? Q@6
} N3) v,S-
k*^W lCZ3
public static void swap(int[] data, int i, int j) { #w6CL
int temp = data; "-%H</
data = data[j]; :B~c>:
data[j] = temp; '"^JNb^I
} O!tD1^O!1}
} _TF>c:m3