[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; L@{5:#-
} 'J`%[,@V
int i1=l; v&EHp{8Qd
int i2=mid+1; 3Yd)Fm
for(int cur=l;cur<=r;cur++){ G*|2qX"o
if(i1==mid+1) ?N|B,F
data[cur]=temp[i2++]; i}5 #n
else if(i2>r) f}'E|:Z 7k
data[cur]=temp[i1++]; n2+eC9I
else if(temp[i1] data[cur]=temp[i1++]; :h&*<!O2B`
else {]}}rx'|P
data[cur]=temp[i2++]; l%^'K%'b
} c!BiGw,;
} /L1qdkG
.hCOi<wB
} :B<lDcFKJ
5"[Qs|VjA6
改进后的归并排序: &OiJJl[9
l}?'U
package org.rut.util.algorithm.support; UUx0#D/U0C
,z?Re)qm
import org.rut.util.algorithm.SortUtil; 'lU9*e9
@,-xaZ[
/** $e! i4pM
* @author treeroot l\yFx
* @since 2006-2-2 U&6!2s-
* @version 1.0 * SG0-_S
*/ 7ST[XLwt%}
public class ImprovedMergeSort implements SortUtil.Sort { TCSm#?[B
u=I>DEe@c
private static final int THRESHOLD = 10; ]~z2s;J{/
ESZ6<!S
/* b "4W` A
* (non-Javadoc) SLc6]?
* xcz1(R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iaq0\d.[7
*/ 1e;^MzB"
public void sort(int[] data) { -,~n|ceI
int[] temp=new int[data.length]; (d[)U<
mergeSort(data,temp,0,data.length-1); ^z$-NSlI
} LmLV2f
oUm"qt_
private void mergeSort(int[] data, int[] temp, int l, int r) { WZ'3
int i, j, k; $+sNjwv^F
int mid = (l + r) / 2; N"b>]Ab] ;
if (l == r) `?Wak=]g
return; NwmO[pt+
if ((mid - l) >= THRESHOLD) gUCv#:
mergeSort(data, temp, l, mid); ,c6ID|\
else oSt-w{!
insertSort(data, l, mid - l + 1); EeKEw Sg
if ((r - mid) > THRESHOLD) r}P{opn$t
mergeSort(data, temp, mid + 1, r); f;6a4<bz
else J%3%l5/
insertSort(data, mid + 1, r - mid); Z^AACKME
i`Es7 }
for (i = l; i <= mid; i++) { }`yIO"{8n
temp = data; MOyQ4<_
} un[Z$moN"
for (j = 1; j <= r - mid; j++) { #5T+P8
temp[r - j + 1] = data[j + mid]; +"a .,-f!
} ~)}npS;
int a = temp[l]; DL2gui3
int b = temp[r]; ;KmSz 1A
for (i = l, j = r, k = l; k <= r; k++) { POc< G^
if (a < b) { ~l-Q0wg
data[k] = temp[i++]; "}|n;:r
a = temp; ^zQ;8)ng
} else { U]fE(mpI9
data[k] = temp[j--]; pHY~_^B4&
b = temp[j]; R{3f5**0
} jGEUl=W
} )5Kzq6.
} JPgV7+{b[
'1=t{Rw
/** MZE8Cvq0
* @param data X#(?V[F]
* @param l x<"e} Oo
* @param i &@A(8(%
*/ dapQ5JT/
private void insertSort(int[] data, int start, int len) { 5A/G?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8|?$KLz?F>
} G7`7e@{
} \<~[uv'
} Q5iuK#/
} `w]=xe
&M~*w~w`
堆排序： jGd{*4{3+
w@4q D
package org.rut.util.algorithm.support; uA:|#mO
iU{F\>
import org.rut.util.algorithm.SortUtil; c0u!V+V%
f>5{SoM
/** qr(SAIX"
* @author treeroot <O>r e3s
* @since 2006-2-2 9>qR6k?
* @version 1.0 waW2$9O
*/ A5+vzu^
public class HeapSort implements SortUtil.Sort{ PV>-"2n
OR4!73[I
/* (non-Javadoc) J \1&3r|R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eM+]KG)}
*/ xe2Ap[Y'M
public void sort(int[] data) { _;{n+i[
MaxHeap h=new MaxHeap(); (D{Fln\
h.init(data); k#ED#']N
for(int i=0;i h.remove(); Q! ]
System.arraycopy(h.queue,1,data,0,data.length); v-X1if1%
} (H<S&5[
sn/^#Aa=N
private static class MaxHeap{ _{KQQ5k\
91r#lDR
void init(int[] data){ R|ViLty
this.queue=new int[data.length+1]; Tv3Bej
for(int i=0;i queue[++size]=data; F>)u<f,C
fixUp(size); !Z,h5u\.w
} b-@VR
} ?Il$f_"B:
]6p?mBuQ
private int size=0; kp[+Iun?
I2qC,Nkk
private int[] queue; I)]wi%
2md1GWyP
public int get() { \q(RqD
return queue[1]; N0sf V
} 4_8%ZaQ\.?
E:f0NV3"1
public void remove() { t*<.^+Vd
SortUtil.swap(queue,1,size--); *n N;!*J
fixDown(1); oJUVW"X6
} "44VvpQC
file://fixdown *;(LKRV
private void fixDown(int k) { B[!wo
int j; ATv.3cy
while ((j = k << 1) <= size) { UW<V(6P
if (j < size %26amp;%26amp; queue[j] j++; ?7'uo$
if (queue[k]>queue[j]) file://不用交换 /fWVgyW>6
break; k;R*mg*K
SortUtil.swap(queue,j,k); Ti!j
k = j; D!ToCVos
} /);cl;"
} f:GZb?Wyd
private void fixUp(int k) { dOqn0Z
while (k > 1) { "Git@%80
int j = k >> 1; [P]zdw w#
if (queue[j]>queue[k]) Lf&p2p?~c
break; ?0WJB[/
SortUtil.swap(queue,j,k); `B"=\0
k = j; +n%uIv
} m\__Fl
} ZTWbe
;M{ @23?`
} :kfHILi
X5cl'J(j9
} KRf$VbuL
x^qmYX$'1b
SortUtil： ><viJ$i
>;dMumX
package org.rut.util.algorithm; @mW: FVI
aIpDf|~
import org.rut.util.algorithm.support.BubbleSort; D:e9609
import org.rut.util.algorithm.support.HeapSort; t;TMD\BU
import org.rut.util.algorithm.support.ImprovedMergeSort; Xa.Qt.C
import org.rut.util.algorithm.support.ImprovedQuickSort; p\wE})mu
import org.rut.util.algorithm.support.InsertSort; # nwEF QA
import org.rut.util.algorithm.support.MergeSort; n|Iy
import org.rut.util.algorithm.support.QuickSort; $U<so{xn%
import org.rut.util.algorithm.support.SelectionSort; b-'41d}Hn
import org.rut.util.algorithm.support.ShellSort; R)"Ds}1G
v9(->X'
/** 4*g`!~)
* @author treeroot H2l/9+
* @since 2006-2-2 ~z$vF
* @version 1.0 57Q^"sl
*/ IExo#\0'6
public class SortUtil { $(H%|Oyn
public final static int INSERT = 1; Ra}%:
public final static int BUBBLE = 2; \C5YVl#
public final static int SELECTION = 3; k)UF.=$d
public final static int SHELL = 4; +N:K V}K
public final static int QUICK = 5; rP>iPDf
public final static int IMPROVED_QUICK = 6; 5m!FtHvm1
public final static int MERGE = 7; Cb7f-Eag
public final static int IMPROVED_MERGE = 8; >t&Frw/Bl
public final static int HEAP = 9; `$\g8Mo
4pq@o
public static void sort(int[] data) { X(U CN0#
sort(data, IMPROVED_QUICK); ?~$0;5)QC
} /L'r L
private static String[] name={ TYGUB%A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V.vA~a
}; t&T0E.kh*X
&[f.;1+C
private static Sort[] impl=new Sort[]{ ~0,Utqy
new InsertSort(), dElOy?v
new BubbleSort(), -@X?~4Idz
new SelectionSort(), XZYpU\K
new ShellSort(), H'Bor\;[>
new QuickSort(), r t@Jw]az
new ImprovedQuickSort(), fpJM)HU
new MergeSort(), 5:6as^i:b
new ImprovedMergeSort(), AC@WhL
new HeapSort() o7)<pfif
}; S#Tc{@e
l)m\i_r:
public static String toString(int algorithm){ lG/M%i
return name[algorithm-1]; G.OAzA13!t
} 1{i)7:Y
CpNnywDRwU
public static void sort(int[] data, int algorithm) { ,f8<s-y4Sg
impl[algorithm-1].sort(data); YQ9@Dk0R
} ?Y7'OlO
q(4W/y
public static interface Sort { Z{s&myd
public void sort(int[] data); Y u\<
} la:i!qAH
D7H,49#1Q
public static void swap(int[] data, int i, int j) { &4Q(>"iL4
int temp = data; sgp5b$2T.
data = data[j]; $_CE!_G&)
data[j] = temp; S C7Tp4
} rVgz+'rFD[
} aT1T.3 a