[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; 'mTY56Yq
} o?Cc
int i1=l; 2N]8@a
int i2=mid+1; .Dl ?a>I
for(int cur=l;cur<=r;cur++){ -3azA7tzz
if(i1==mid+1) WVKAA.
data[cur]=temp[i2++]; 23`salLclG
else if(i2>r) r<Cr)%z!
data[cur]=temp[i1++]; j(]O$""
else if(temp[i1] data[cur]=temp[i1++]; `wU['{=
else 1#Hr{&2
data[cur]=temp[i2++]; !E_|Zp]up
} qSG0TWD!pq
} )pT5"{
;aX?K/
} \%.oi@A
jYFmL_{
改进后的归并排序: t u{~:Z(
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package org.rut.util.algorithm.support; 3 H5
_)!*,\*`{
import org.rut.util.algorithm.SortUtil; GKSF(Tnj
KG9-ac
/** _~ei1 G.R
* @author treeroot O!XSU,
* @since 2006-2-2 W*#5Sk
* @version 1.0 -C}"1|P!
*/ ?A_+G 5
public class ImprovedMergeSort implements SortUtil.Sort { JX[]u<h?
(xVx|:R[<H
private static final int THRESHOLD = 10; o$Nhx_F
e*PUs
/* $Cfp1#
* (non-Javadoc) JMo r[*
* (w5cp!qW9J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %N&W_.F6
*/ ID!S}D
public void sort(int[] data) { <)T~_s
int[] temp=new int[data.length]; _@[W[=|H
mergeSort(data,temp,0,data.length-1); 6 R})KIG
} U`HY eJ
[u2t1^#Ol
private void mergeSort(int[] data, int[] temp, int l, int r) { {=mGXd`x?l
int i, j, k; {6:*c
int mid = (l + r) / 2; #OM)71kB8
if (l == r) X;GU#8W
return; 4;CI<&S
if ((mid - l) >= THRESHOLD) SJMbYjn0J
mergeSort(data, temp, l, mid); 3W_7xLA
else cSV&p|
insertSort(data, l, mid - l + 1); uL1lB@G@
if ((r - mid) > THRESHOLD) K<`Z@f3'w
mergeSort(data, temp, mid + 1, r); l"nS+z
else ~D4l64
insertSort(data, mid + 1, r - mid); Yk|.UuXT
m*N8!1Ot
for (i = l; i <= mid; i++) { ~n%Lo3RiP
temp = data; ) 5$?e
} ~+Pe=~a[
for (j = 1; j <= r - mid; j++) { eL(<p]
temp[r - j + 1] = data[j + mid]; r hucBm
} Og1vD5a
int a = temp[l]; $ B&ZnZ?
int b = temp[r]; EA8plQ~GtE
for (i = l, j = r, k = l; k <= r; k++) { RtHai[j
if (a < b) { "0#(<zb|
data[k] = temp[i++]; !bYVLFp=\_
a = temp; Ry]9n.y
} else { g0U?`;n$
data[k] = temp[j--]; #G F.M,O/h
b = temp[j]; 0D '^:
} _80L/92
} bEQ-?X%7
} c!7WRHJE_a
oe 6-F)+
/** QkD ~
* @param data 0!0e$!8l
* @param l /(hTk&
* @param i ,f:K)^yD
*/ !3k-' ),z&
private void insertSort(int[] data, int start, int len) { {4Kvr4)4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .<z7$lz\
} 2(l0Lq*
} ?#(LH\$l_
} ]k7%p>c=B
} 37a1O>A
z+6PVQ
堆排序： A-=hvJ5T
Xnjl {`
package org.rut.util.algorithm.support; [w@S/K[_|
GU2TQx{V
import org.rut.util.algorithm.SortUtil; MQN~I^v3
J@_^]
/** _",(!(
* @author treeroot L@6]~[JvP
* @since 2006-2-2 KhB775
* @version 1.0 eUB!sR%
*/ "49dsKIOH
public class HeapSort implements SortUtil.Sort{ {%9@{Q'T.s
vCJa%}
/* (non-Javadoc) !'F1Ht
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YF-E1`+?<
*/ sfn^R+x4,9
public void sort(int[] data) { O(8CrKYY
MaxHeap h=new MaxHeap(); u_9c>
h.init(data); ui#nN
for(int i=0;i h.remove(); .Hqq!&
System.arraycopy(h.queue,1,data,0,data.length); 5= &2=
} Y8v[kuo7
=wDXlAQ
private static class MaxHeap{ r.zgLZ}3&V
}Cw,m0KV/
void init(int[] data){ f*Q9u>1p
this.queue=new int[data.length+1]; i^.eX VV/
for(int i=0;i queue[++size]=data; `Tyd1!~
fixUp(size); nTr]NBR
} M3@qhEf?vk
} s<!G2~T
w[gt9]}N
private int size=0; ;iKtv+"
fv8x7l7
private int[] queue; @XzfuuE]
k@|px#kq
public int get() { SQ[D2v
return queue[1]; bRm;d_9zC
} lD[@D9
@U5gxK*
public void remove() { 9]IZ3 fQX
SortUtil.swap(queue,1,size--); z!bT^_Cc0
fixDown(1); hwXsfh |
} dB4ifeT]
file://fixdown -A w]b} #v
private void fixDown(int k) { 7JQ4*RM
int j; B?8*-0a'[
while ((j = k << 1) <= size) { 8Z\q)T
if (j < size %26amp;%26amp; queue[j] j++; c8uw_6#r(D
if (queue[k]>queue[j]) file://不用交换 1[Yl8W%pj
break; ?|W3RK;
SortUtil.swap(queue,j,k); Bt@?l]Y
k = j; zc)nDyn
} _p0Yhju?
} Evm3Sm!S
private void fixUp(int k) { [=jZP,b&),
while (k > 1) { Sj(>G;
int j = k >> 1; 9 CZ@IFS
if (queue[j]>queue[k]) _^GBfM.
break; MjC<N[WO>N
SortUtil.swap(queue,j,k); TCyev[(
k = j; o<!H/PN
} T2w4D!
} ZOV,yuD{8{
zi6J|u
} 6z U
wQy~5+LE
} ,%IP27bPW
dR\yRC]I
SortUtil： T]&?^QGAZ
eUNaq&M
package org.rut.util.algorithm; :3Q:pKg
` wEX;
import org.rut.util.algorithm.support.BubbleSort; o;Z"I&
import org.rut.util.algorithm.support.HeapSort; 1K@ieVc
import org.rut.util.algorithm.support.ImprovedMergeSort; \os"w "
import org.rut.util.algorithm.support.ImprovedQuickSort; 3<$Ek3X
import org.rut.util.algorithm.support.InsertSort; o}KVT%}
import org.rut.util.algorithm.support.MergeSort; w@,p`
import org.rut.util.algorithm.support.QuickSort; ?B ,<gen
import org.rut.util.algorithm.support.SelectionSort; #!O)-dyF
import org.rut.util.algorithm.support.ShellSort; Jaw1bUP!oK
!|4]V}JQ
/** 06AgY0\
* @author treeroot gw,K*ph}q
* @since 2006-2-2 >^g2Tg:
* @version 1.0 \a;xJzc9
*/ (jU_lsG
public class SortUtil { UwS7B~
public final static int INSERT = 1; ]h`*w
public final static int BUBBLE = 2; 18F}3t??
public final static int SELECTION = 3; q9ra
public final static int SHELL = 4; 5"57F88Y1
public final static int QUICK = 5; +5|k#'%5
public final static int IMPROVED_QUICK = 6; PV~D;
public final static int MERGE = 7; cb)7$S
public final static int IMPROVED_MERGE = 8; ,iao56`E
public final static int HEAP = 9; |-S!)iG1V
*> nOL
public static void sort(int[] data) { bskoi;)u
sort(data, IMPROVED_QUICK); p#P<V%
} QjSWl,{ $D
private static String[] name={ P<&bAsje
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LhAW|];
}; 3h.,7,T
eJ45:]_%I@
private static Sort[] impl=new Sort[]{ N(4y}-w$
new InsertSort(), }gXhN"
new BubbleSort(), JGvhw,g
new SelectionSort(), 3;Yd"
new ShellSort(), qdpi-*2
new QuickSort(), 3)W_^6>bM
new ImprovedQuickSort(), HJg&fkHn1
new MergeSort(), |^5"-3Q
new ImprovedMergeSort(), F5x*#/af
new HeapSort() (kY0<
}; S"G(_%
uQ_C<ii"W
public static String toString(int algorithm){ xf;>o$oN0P
return name[algorithm-1]; UJqh~s
} IowXVdm@6
+=9iq3<yfS
public static void sort(int[] data, int algorithm) { <\$"U5"`
impl[algorithm-1].sort(data); 1K/ :
} 1HNP@9ga
F!hjtIkPj
public static interface Sort { #3_g8ni5X
public void sort(int[] data); *Lz'<=DLoW
} 8f~x\.
w`8H=Hf
public static void swap(int[] data, int i, int j) { -V4{tIQY
int temp = data; qVfn(rZ
data = data[j]; HM)D/CO,?
data[j] = temp; |z3!3?%R
} ,|yscp8
} ;Z0&sFm