[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; &sJ6k/l
} ?:7$c
int i1=l; OHH\sA
int i2=mid+1; Ma ]*Pled
for(int cur=l;cur<=r;cur++){ YgQb(umK
if(i1==mid+1) y@ c[S;
data[cur]=temp[i2++]; {@tO9pc`8
else if(i2>r) t+Qx-sW
data[cur]=temp[i1++]; ;"NW=P&
else if(temp[i1] data[cur]=temp[i1++]; * YLpC^&
else d(,M
data[cur]=temp[i2++]; cfc=a
} ypTH=]y
} hz-^9U
U@LIw6B!KL
} }l5Q0'
87R$Y> V
改进后的归并排序: {w v{"*Q9Q
i~{0>"9
package org.rut.util.algorithm.support; ERfSJ
-Y>QKS
import org.rut.util.algorithm.SortUtil; ;jmT5XzL
#*"I?B/fd8
/** 8HWEObRY
* @author treeroot fQf5%
* @since 2006-2-2 3AcDW6x|
* @version 1.0 Et;Ubj"+
*/ j__l'?s
public class ImprovedMergeSort implements SortUtil.Sort { [-nPHmZV[
G;J!3A;TE
private static final int THRESHOLD = 10; kM76?M
@CA{uP;
/* ]QF*\2b-I2
* (non-Javadoc) VB=jKMi
* 8y]{I^z}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Lv-M.
*/ ~W_T3@
public void sort(int[] data) { Tqx
int[] temp=new int[data.length]; <,&t}7M/:
mergeSort(data,temp,0,data.length-1); 2bOFH6g
} d.y-R#F_]
YcM0A~<
private void mergeSort(int[] data, int[] temp, int l, int r) { m3`J9f,c/
int i, j, k; 9#\oGzDN
int mid = (l + r) / 2; ~@D{&7@
if (l == r) iMF-TR
return; z+j3j2
if ((mid - l) >= THRESHOLD) 7C~g?1
mergeSort(data, temp, l, mid); $T*g@]
else 8HDI]
insertSort(data, l, mid - l + 1); is{H >#+"
if ((r - mid) > THRESHOLD) YF)c.Q0
mergeSort(data, temp, mid + 1, r); oox;8d4}y
else ezhK[/E=
insertSort(data, mid + 1, r - mid); }t1J`+x%
Qt=OiKZ
for (i = l; i <= mid; i++) { Ka8Bed3
temp = data; 9gETWz(3I
} A3Vj3em
for (j = 1; j <= r - mid; j++) { ^{64b
temp[r - j + 1] = data[j + mid]; gzp]hh@4
} GAlM:>
int a = temp[l]; @[O|n)7
int b = temp[r]; P2 z~U
for (i = l, j = r, k = l; k <= r; k++) { `M ~-(,++
if (a < b) { KK/siG~O
data[k] = temp[i++]; 2Jt*s$
a = temp; 0G8zFe*p
} else { H|<Zm:.%$
data[k] = temp[j--]; @zig{b8
b = temp[j]; >8gb/?z
} Q\z9\mMG-
} F?4&qbdD
} i5czm?x
UQJ
/** nOU.=N v`
* @param data @5cY5e*i{
* @param l fh9w5hT={
* @param i k}e~xbh-y
*/ #6 M3BF
private void insertSort(int[] data, int start, int len) { cTdX'5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t0)XdIl8
} 6FEIQ#`{
} xDn#=%~+x
} uiaZ@
} P:m6:F@hO
N[sJ5oF
堆排序： dU|&- .rG
#9q ]jjH E
package org.rut.util.algorithm.support; ]U.*KkQ
p^ )iC&*0
import org.rut.util.algorithm.SortUtil; DP!~WkU~
2h`Tn{&1/
/** --F6n/>
* @author treeroot ZP"Xn/L
* @since 2006-2-2 qyR}|<F8*
* @version 1.0 J|DY /v
*/ _kUtj(re
public class HeapSort implements SortUtil.Sort{ t:tIzFNv
nRheByYm
/* (non-Javadoc) vFi+ExBU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fD2)/5j1
*/ T!t9`I0Zz
public void sort(int[] data) { '~AR|8q?
MaxHeap h=new MaxHeap(); tIo b
h.init(data); ^8 cq qu
for(int i=0;i h.remove(); ulNMqz\.
System.arraycopy(h.queue,1,data,0,data.length); J,t`ilT
} Lwkl*
SF[}suL
private static class MaxHeap{ :[ll$5E.
J{PNB{v
void init(int[] data){ fmv,)UP
this.queue=new int[data.length+1]; =8Gpov1!V~
for(int i=0;i queue[++size]=data; c6MMI]+8
fixUp(size); WL}XD Kx
} x]~&4fp
} =v=u+nO
T}Ve:S
private int size=0; HD>UTX`&mc
>yqFO
private int[] queue; I"HA( +G
X>U _v
public int get() { 0G(|`xG1q
return queue[1]; *fQn!2}=(
} +RyV"&v
a[NR%Xq
public void remove() { z#/"5 l
SortUtil.swap(queue,1,size--); 3?<LWrhV3
fixDown(1); k;l^y%tzp
} LMI7Ih;
file://fixdown 5GDg_9Bz
private void fixDown(int k) { 8Bx58$xRq
int j; b-YmS=*
while ((j = k << 1) <= size) { gm7 [m}
if (j < size %26amp;%26amp; queue[j] j++; $dF$-y<[0
if (queue[k]>queue[j]) file://不用交换 Z~ u3{
break; fY!9i5@'
SortUtil.swap(queue,j,k); nt*K@
k = j; `a9iq>
} il$eO 7
} |P7FPmn
private void fixUp(int k) { %;b]k
while (k > 1) { wnHfjF
int j = k >> 1; aA'of>'ib|
if (queue[j]>queue[k]) ;e6-*
break; __`6 W1
SortUtil.swap(queue,j,k); S%df'bh$
k = j; deCi\n
} EAK[2?CY
} !k!1h%7q
Koc5~qUY]
} Dfy=$:Q
jt3=<&*Bm
} _3q}K
Zhc99L&K
SortUtil： K<MWiB&
=LKf.@]#
package org.rut.util.algorithm; >FqU=Q
B{>x
import org.rut.util.algorithm.support.BubbleSort; 4++pK;I
import org.rut.util.algorithm.support.HeapSort; =-/sB>-C
import org.rut.util.algorithm.support.ImprovedMergeSort; ;3+_aoY
import org.rut.util.algorithm.support.ImprovedQuickSort; hp}JKj@
import org.rut.util.algorithm.support.InsertSort; -!IeP]n#P
import org.rut.util.algorithm.support.MergeSort; t)4]2z)$
import org.rut.util.algorithm.support.QuickSort; =A(Az
import org.rut.util.algorithm.support.SelectionSort; 3e)$<e
import org.rut.util.algorithm.support.ShellSort; {2U3
)oy+-1dE
/** bfI= =
* @author treeroot >{>X.I~
* @since 2006-2-2 SZ~lCdWad
* @version 1.0 ;KT/;I
*/ )C0d*T0i
public class SortUtil { J>1%*Tz
public final static int INSERT = 1; O"J"H2}S
public final static int BUBBLE = 2; ^ LVKXr
public final static int SELECTION = 3; XC4wm#R
public final static int SHELL = 4; huvn_
public final static int QUICK = 5; rTim1<IXR
public final static int IMPROVED_QUICK = 6; H{1'- wB
public final static int MERGE = 7; _}tPtHPa/
public final static int IMPROVED_MERGE = 8; B(Er/\-@U
public final static int HEAP = 9; HJt '@t=Ak
,>Dpt<
public static void sort(int[] data) { }H|'W[Q.
sort(data, IMPROVED_QUICK); F12$BKDH
} |qpFR)l
private static String[] name={ .TNGiUzG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?nZe.z-%6
}; WG +]
~bz$]o-<
private static Sort[] impl=new Sort[]{ 9K-,#a
new InsertSort(), uobQS!
new BubbleSort(), vb3hDy
new SelectionSort(), 8WC_CAP
new ShellSort(), svtqX-Vj"
new QuickSort(), ?%$~Bb _
new ImprovedQuickSort(), yYdh+x
new MergeSort(), d '\^S}
new ImprovedMergeSort(), 0 gR_1~3
new HeapSort() S}qGf%
}; v ,zD52
15d'/f
public static String toString(int algorithm){ -K/c~'%'*
return name[algorithm-1]; f6 s .xQ
} 9U Hh#
hx ^l
public static void sort(int[] data, int algorithm) { 0bOT&Z^
impl[algorithm-1].sort(data); ua,!kyS
} #44}Snz
QwL*A `@
public static interface Sort { 25<qo{
public void sort(int[] data); $GYy[8{:V
} z>)lp$
X$_pDF&\z
public static void swap(int[] data, int i, int j) { S3&n?\CO:
int temp = data; FsS.9 `B
data = data[j]; U65oh8x
data[j] = temp; V!NRBXg
} wLNkXC
} OxUc,%e9P