[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; ~Mxvq9vaD
} VMWf>ZU
int i1=l; 0@oJFJrO
int i2=mid+1; 2JBR)P
for(int cur=l;cur<=r;cur++){ 4,DeHJjAlE
if(i1==mid+1) t b}V5VH
data[cur]=temp[i2++]; /k3:']G,s
else if(i2>r) oCz/HQoBk
data[cur]=temp[i1++]; /7YIn3
else if(temp[i1] data[cur]=temp[i1++]; <RL]
else <)D$51 &0
data[cur]=temp[i2++]; 9\7en%(M
} zTU0HR3A
} Y76gJ[yjn
H4+i.*T#
} N(yzk_~
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改进后的归并排序: eJ-nKkg~a
E7hY8#G
package org.rut.util.algorithm.support; 4o[{>gW
sfl<qD+?
import org.rut.util.algorithm.SortUtil; jmZI7?<z
utV_W&
/** TM%%O :3
* @author treeroot + {'.7#
* @since 2006-2-2 x[e<} 8'$(
* @version 1.0 nqUV
*/ Zj'9rXhrM1
public class ImprovedMergeSort implements SortUtil.Sort { Z *x'+X
j0q&&9/Jj
private static final int THRESHOLD = 10; CpTjJXb
#%O0[kd
/* l.M0`Cn-%
* (non-Javadoc) U 6)#}
* h/Y'<:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LrpM\}t
*/ }Zp,+U*"
public void sort(int[] data) { |2A:eI8 ^
int[] temp=new int[data.length]; SOIN']L|V[
mergeSort(data,temp,0,data.length-1); N8df8=.kw
} $[ *w"iQ
7b+6%fV
private void mergeSort(int[] data, int[] temp, int l, int r) { hM!a_'
int i, j, k; YN5rml'-
int mid = (l + r) / 2; d&>^&>?$zh
if (l == r) cH2K )~
return; -XG@'P_
if ((mid - l) >= THRESHOLD) GTHt'[t@;
mergeSort(data, temp, l, mid); R=\IEqqsi
else ~a2}(]
insertSort(data, l, mid - l + 1); 5[0?g@aO
if ((r - mid) > THRESHOLD) f _:A0
mergeSort(data, temp, mid + 1, r); j1<Yg,_.p
else n `Ac 3A
insertSort(data, mid + 1, r - mid); #KvlYZ+1
uPvEwq* C
for (i = l; i <= mid; i++) { !5!<C,U
temp = data; \Vk:93OH21
} Q+{n-? :
for (j = 1; j <= r - mid; j++) { c &c@M$
temp[r - j + 1] = data[j + mid]; |DwZ{(R"W
} #<xm.
int a = temp[l]; k;Y5BB
int b = temp[r]; kq-) ^,{y
for (i = l, j = r, k = l; k <= r; k++) { (cO:`W6.
if (a < b) { [V`r^
data[k] = temp[i++]; 8{ I|$*nB
a = temp; #\ErY3k6&
} else { @2#lI
data[k] = temp[j--]; 7t3!)a|lI
b = temp[j]; +ZX{>:vo
} # f\rt
} 8zb/xP>
} n=q76W\
0n'_{\yz
/** 5mR 1@
* @param data J .<F"r>
* @param l 1\.pMHv/
* @param i w32y3~
*/ LR3*G7
private void insertSort(int[] data, int start, int len) { ?q [T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y1#1Ne_
} L"aeG
} \{D" !e
} 7j{?aza
} ),!qTjD
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堆排序： |':{lH6+1
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package org.rut.util.algorithm.support; |vC~HJpuv'
{.]7!ISl5
import org.rut.util.algorithm.SortUtil; xYB{;K
;FEqe49
/** `GLx#=Q
* @author treeroot 1.>m@Slr>
* @since 2006-2-2 HbIF^LeY|R
* @version 1.0 Alq(QDs
*/ @}ZVtrz
public class HeapSort implements SortUtil.Sort{ LRF103nw
*NQ/UXE
/* (non-Javadoc) \)Cl%Em
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v` r:=K
*/ ,fRq5"?
public void sort(int[] data) { |l!aB(NW
MaxHeap h=new MaxHeap(); dF2RH)Ud
h.init(data); {c0`Um3&>
for(int i=0;i h.remove(); AOx[
System.arraycopy(h.queue,1,data,0,data.length); yh=N@Z*zP
} *z2s$EZ
@%SQFu@FJ
private static class MaxHeap{ 6H|S;K+
FiU#T.`9'
void init(int[] data){ `F6C-
this.queue=new int[data.length+1]; fc@A0Hf
for(int i=0;i queue[++size]=data; Y9|!+,
fixUp(size); e';_Y>WQy
} B/C,.?Or
} I}Q2Vu<
=\d?'dII:
private int size=0; g,Y/M3>(
u=yOu^={
private int[] queue; GKCroyor
\j.:3Xr
public int get() { QCJM&
return queue[1]; DL.!G
} v8DC21pb
.sA.C]f
public void remove() { BORA(,
SortUtil.swap(queue,1,size--); },[}$m%
fixDown(1); Vz[C=_m
} mcok/,/
file://fixdown &?RQZHtg
private void fixDown(int k) { ~_a-E
int j; ze;KhUPRm
while ((j = k << 1) <= size) { y!%CffF2
if (j < size %26amp;%26amp; queue[j] j++; LIdF 0
if (queue[k]>queue[j]) file://不用交换 h.fq,em+H
break; { "E\Jcjl\
SortUtil.swap(queue,j,k); cGD(.=
k = j; |D.ND%K&
} $wU\Js`/S]
} 07$o;W@
private void fixUp(int k) { L.WljNo
while (k > 1) { RrgGEx
int j = k >> 1; M@ZI\
if (queue[j]>queue[k]) PxE3K-S)G
break; ?'je)F
SortUtil.swap(queue,j,k); E~:x(5'%d
k = j; Q5_o/wk
} FCn_^l)EA
} K4);HJ|=
snikn&
} yiI1x*^
<^uBoKB/f
} RX5dO%
b_):MQ1{
SortUtil： ri.I pRe
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package org.rut.util.algorithm; as_PoCoss
@OHm#`~
import org.rut.util.algorithm.support.BubbleSort; d^6M9lGU
import org.rut.util.algorithm.support.HeapSort; !?gKqx'T$
import org.rut.util.algorithm.support.ImprovedMergeSort; *WT`o>
import org.rut.util.algorithm.support.ImprovedQuickSort; >dG[G>
import org.rut.util.algorithm.support.InsertSort; N.{D$"
import org.rut.util.algorithm.support.MergeSort; 6MkP |vr6
import org.rut.util.algorithm.support.QuickSort; w+{LAS
import org.rut.util.algorithm.support.SelectionSort; \'bzt"f$j
import org.rut.util.algorithm.support.ShellSort; l/awS!Q/nF
?I@W:#>o
/** ?K\axf>F
* @author treeroot mdgi5v
* @since 2006-2-2 nj53G67y
* @version 1.0 #Vha7
*/ {Dmjm{
public class SortUtil { 6i~WcAs
public final static int INSERT = 1; 0_t`%l=
public final static int BUBBLE = 2; &pp|U}
public final static int SELECTION = 3; `^y7f
public final static int SHELL = 4; xK\d4"
public final static int QUICK = 5; y;H-m>*%
public final static int IMPROVED_QUICK = 6; u-5{U-^_
public final static int MERGE = 7; Q)[C?obd v
public final static int IMPROVED_MERGE = 8; <3hRyG@vB
public final static int HEAP = 9; N'`A?&2ru
ilx)*Y
public static void sort(int[] data) { w:Kl6"c
sort(data, IMPROVED_QUICK); #?9;uy<j.q
} ~La>?:g <+
private static String[] name={ P}7'm M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hFl^\$Re
}; v-_e)m^
+&2%+[nBZ
private static Sort[] impl=new Sort[]{ pD#rnp>WWt
new InsertSort(), 1^(ad;BCy
new BubbleSort(), QW(Mz Hg
new SelectionSort(), 3x'|]Ns
new ShellSort(), UQ@L V~6{R
new QuickSort(), xx%j.zDI]
new ImprovedQuickSort(), ` v@m-j6
new MergeSort(), |2n4QBH!
new ImprovedMergeSort(), g~A`N=r;h
new HeapSort() wov\kV
}; BeoDKdAwY
&AbNWtCV+G
public static String toString(int algorithm){ \Et3|Iv
return name[algorithm-1]; [0[i5'K:
} "a>q`RaIQ"
"3"V3w
public static void sort(int[] data, int algorithm) { fZzoAzfv2
impl[algorithm-1].sort(data); E`0?
} <8i//HOE
$Sx'sA2
public static interface Sort { UWJ8amA
public void sort(int[] data); V-2(?auZd
} +wU@ynw
\0I_<
public static void swap(int[] data, int i, int j) { gNrjo=
int temp = data; 8f4b&ah
data = data[j]; \?ZB]*Fu
data[j] = temp; YnS#H"
} Y%aCMP9j~9
} #PW9:_BE