[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; ZuvPDW%
} NOr <,
int i1=l; qmA2bw]
int i2=mid+1; 8A^jD(|
for(int cur=l;cur<=r;cur++){ 0sDwTb"
if(i1==mid+1) !I5~))E
data[cur]=temp[i2++]; 1N9<d,
else if(i2>r) ouVjZF@kS
data[cur]=temp[i1++]; a4(?]ND~6
else if(temp[i1] data[cur]=temp[i1++]; :e]9T3Q
else Y/,$Y]%g
data[cur]=temp[i2++]; OR\DTLIl
} 4r[pMJiq
} /.)[9bQ<
(X(1kj3
} 7q!yCU
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改进后的归并排序: N3gNOq&
P$18Xno{
package org.rut.util.algorithm.support; 'DzBp
!ml_S)
import org.rut.util.algorithm.SortUtil; )W]>\=@Y
nFe` <Al$N
/** _t|G@D{
* @author treeroot hA*Z'.[
* @since 2006-2-2 N(:nF5>_
* @version 1.0 e(~'pk"mZ
*/ .3a:n\tY
public class ImprovedMergeSort implements SortUtil.Sort { ^+*GbY$'
@1v3-n=
private static final int THRESHOLD = 10; \ I^nx+l
]Y4q'KH
/* q*[!>\Z8
* (non-Javadoc) X_u@D;$
* U['JFLF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4L=$K2R2r
*/ 4YDT%_h0
public void sort(int[] data) { LAv:+o(m/
int[] temp=new int[data.length]; BFMS*t`
mergeSort(data,temp,0,data.length-1); wfBuU>
} (@)2PO/
D[89*@v
private void mergeSort(int[] data, int[] temp, int l, int r) { 1mHwYT+
int i, j, k; -(\1r2 Y
int mid = (l + r) / 2; x0\e<x9s
if (l == r) 3s`V)aXP
return; ]By0Xifew
if ((mid - l) >= THRESHOLD) `]`=]*d
mergeSort(data, temp, l, mid); }_{y|NW
else =oE_.ux\
insertSort(data, l, mid - l + 1); .P)s4rQ\
if ((r - mid) > THRESHOLD) WI1T?.Gc
mergeSort(data, temp, mid + 1, r); Hp btj
else 5vD3K!\u
insertSort(data, mid + 1, r - mid); 59{;VY81
lSH ZV Fd
for (i = l; i <= mid; i++) { I&L.;~
temp = data; (n=9c%w
} "^;#f+0
for (j = 1; j <= r - mid; j++) { j4;Du>obQ
temp[r - j + 1] = data[j + mid]; \U/v;Ijf
} _*s~`jn{H
int a = temp[l]; [IiwNqZ[~
int b = temp[r]; h&lyxYZ+T$
for (i = l, j = r, k = l; k <= r; k++) { >M?H79fF2s
if (a < b) { {7vgHutp
data[k] = temp[i++]; 8h2D+1,PZC
a = temp; f:]u`ziM
} else { w6vLNX
data[k] = temp[j--]; L-#e?Y}$J
b = temp[j]; HHz;0V4w?
} }@d>,1DU
} 9%sFJ
} }FrEF\}]_7
*kP;{Cb`
/** qQ^d9EK'?~
* @param data 'X9AG6K1
* @param l HLVQ7
* @param i K[kds`
*/ Q4RpK(N
private void insertSort(int[] data, int start, int len) { 'e F%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |2O')3p"9
} tl|ijR
} 4S tjj!ew
} Q|?'(J+
} 13H;p[$
oz LH]*
堆排序： H nK!aa
rWA6XDM7
package org.rut.util.algorithm.support; H( vx/q
kVd5,Qd
import org.rut.util.algorithm.SortUtil; vm8$:W2 }
8) HBh7/
/** }MP>]8Aq
* @author treeroot }`9jH:q-Z
* @since 2006-2-2 9TC) w|
* @version 1.0 yNBv-oe5
*/ ,]ga[
public class HeapSort implements SortUtil.Sort{ )>V?+L5M
@OzMiN
/* (non-Javadoc) V@[rf<,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `{[RjM`
*/ {?Od{d9
public void sort(int[] data) { vwmBUix
MaxHeap h=new MaxHeap(); eeM?]J-
h.init(data); 8f|98T"
for(int i=0;i h.remove(); l-<`m#/v
System.arraycopy(h.queue,1,data,0,data.length); M diwRi
} Lkn4<'un
sef]>q
private static class MaxHeap{ ];1R&:t
`rlk|&T1
void init(int[] data){ c+g@Z"es
this.queue=new int[data.length+1]; k=$AhT=e}n
for(int i=0;i queue[++size]=data; 3@_Elu
fixUp(size); b5<okICD
} y\D=Z N@
} .1#kDM
Xh F_]
private int size=0; i7w(S3a
`:p1&OS
private int[] queue; (5a1P;_Y
?2 f_aY ;
public int get() { _[t8rl
return queue[1]; X:|8vS+0gU
} $,ikv?"L
BhkoSkr
public void remove() { v+xB7w
SortUtil.swap(queue,1,size--); uOd&XW
fixDown(1); Jxa4hM0
} -DjJ",h( $
file://fixdown 0^3+P%(o@
private void fixDown(int k) { Dvc&RG
int j; ]{GDS! )
while ((j = k << 1) <= size) { ;wHCj$q
if (j < size %26amp;%26amp; queue[j] j++; 'V (,.'
if (queue[k]>queue[j]) file://不用交换 ]PR#W_&q
break; b?T
SortUtil.swap(queue,j,k); H43MoC
k = j; \)/yC74r7(
} }ptq )p
} !RH.|}
private void fixUp(int k) { 2VoKr)
while (k > 1) { @7<uMasfp
int j = k >> 1; [{ ~TcT
if (queue[j]>queue[k]) \r{W
break; ~ G6"3"
SortUtil.swap(queue,j,k); k[kju%i4
k = j; j Ux z
} ?LK2g
} @~ETj26U'
i'#Gy,R
} 6"f}O<M5H
E3aDDFDH
} )B$;Vs]@i
,|kDsR!
SortUtil： =]C]=
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package org.rut.util.algorithm; Sa1l=^
tjT>VwqH
import org.rut.util.algorithm.support.BubbleSort; %9oYw9H!
import org.rut.util.algorithm.support.HeapSort; ACq7dLys,B
import org.rut.util.algorithm.support.ImprovedMergeSort; Tr0B[QF
import org.rut.util.algorithm.support.ImprovedQuickSort; v<Kmq-b
import org.rut.util.algorithm.support.InsertSort; Av'GB
import org.rut.util.algorithm.support.MergeSort; VVP:w%yW
import org.rut.util.algorithm.support.QuickSort; }g7]?Ee
import org.rut.util.algorithm.support.SelectionSort; @&|l^ 1
import org.rut.util.algorithm.support.ShellSort; ,#?uJTLH
f"1>bW>R+
/** X;v$5UKU
* @author treeroot 6GPp>X
* @since 2006-2-2 6Htg5o|W
* @version 1.0 9o*,P,j'}
*/ D,qu-k[jMI
public class SortUtil { rE9I>|tX
public final static int INSERT = 1; 1K,1X(0rL8
public final static int BUBBLE = 2; }v:jncp
public final static int SELECTION = 3; W6H,6v
public final static int SHELL = 4; R218(8S
public final static int QUICK = 5; *}k;L74|
public final static int IMPROVED_QUICK = 6; \.YS%"Vz
public final static int MERGE = 7; LI2&&Mw
public final static int IMPROVED_MERGE = 8; Urr#N
public final static int HEAP = 9; om?-WJI
6`vC1PK^
public static void sort(int[] data) { 26T"XW'_
sort(data, IMPROVED_QUICK); MUfG?r\t
} bwiPS1+);
private static String[] name={ B#/Q'V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9z)5Mdf1j
}; -46C!6a
otggN:^Qw
private static Sort[] impl=new Sort[]{ V,rq0xW
new InsertSort(), T^J>ZDA
new BubbleSort(), a:QDBS2Llv
new SelectionSort(), u#}[ZoI
new ShellSort(), s(X;Eha
new QuickSort(), (Jz;W<E
new ImprovedQuickSort(), #9K-7je;j
new MergeSort(), Sb~MQ_
new ImprovedMergeSort(), RV@*c4KvO+
new HeapSort() @E:,lA
}; mZd , 9
(?nCyHC%g
public static String toString(int algorithm){ kbM3
return name[algorithm-1]; /0Ax*919j
} jH_JmYd
Q7W>qe%4
public static void sort(int[] data, int algorithm) { ai0XL}!+
impl[algorithm-1].sort(data); O)vp~@|
} / X1 x
,\NFt`]j
public static interface Sort { D9M:^
public void sort(int[] data); nqLA}u4IM
} "I(xgx*
JH7<
public static void swap(int[] data, int i, int j) { G37U6PuZi
int temp = data; e=.]F*:J
data = data[j]; wiiCd
data[j] = temp; R=jI?p
} i-6Z"b{
} 1YH+d0UGn