[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; c,so`I3rI
} u$%t)2+$4
int i1=l; U<XSj#&8|
int i2=mid+1; *vgl*k?)
for(int cur=l;cur<=r;cur++){ R(.}C)q3
if(i1==mid+1) +[\eFj|=
data[cur]=temp[i2++]; 9[!,c`pw
else if(i2>r) u&G.4QQF
data[cur]=temp[i1++]; (>J4^``x=
else if(temp[i1] data[cur]=temp[i1++]; $VAx:Y|
else jR=s#Xz
data[cur]=temp[i2++]; >56>*BHD
} x@mL $
} f)]%.>
GdB.4s^
} _'4A|-9
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改进后的归并排序: wB'zuPAK6
6nhMP$h
package org.rut.util.algorithm.support; U$oduY#
\ w3]5gJZ
import org.rut.util.algorithm.SortUtil; %B.D^]S1:
nEzf.[+9/
/** mw_Ew]&
* @author treeroot *5bLe'^\|K
* @since 2006-2-2 Y_`-9'&
* @version 1.0 <Q|d&vDVfV
*/ 5J8r8` t
public class ImprovedMergeSort implements SortUtil.Sort { '`'GK&)
=b;>?dP
private static final int THRESHOLD = 10; IH$0)g;s
y@CHR
/* B?VhIP e
* (non-Javadoc) sLE#q+W
* 2r$#m*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IwGqf.!.>
*/ NM)k/?fA
public void sort(int[] data) { **69rN
int[] temp=new int[data.length]; {M,,npl
mergeSort(data,temp,0,data.length-1); </uOe.l>Q
} !lo/xQ<
.^J2.>.
private void mergeSort(int[] data, int[] temp, int l, int r) { MX>[^}n
int i, j, k; `1:{0p2q
int mid = (l + r) / 2; *<1r3!
if (l == r) @aJ!PV'ms
return; EpQ8a[<-3
if ((mid - l) >= THRESHOLD) `3p~m,
mergeSort(data, temp, l, mid); c8Z wr]DF
else vb9OonE2
insertSort(data, l, mid - l + 1); E2)h?cs
if ((r - mid) > THRESHOLD) x8GJY~:SW
mergeSort(data, temp, mid + 1, r); -OSa>-bzNx
else !8`3GX:B_
insertSort(data, mid + 1, r - mid); SkU9ON
0M\D[mg
for (i = l; i <= mid; i++) { j,]Y$B
temp = data; RK w$-7O
} UGK*Gy
for (j = 1; j <= r - mid; j++) { %`Z!4L
temp[r - j + 1] = data[j + mid]; NnVnUgx
} (sWLhUgRX
int a = temp[l]; @{Gncy|
int b = temp[r]; #c^^=Z
for (i = l, j = r, k = l; k <= r; k++) { YBh'EL}P
if (a < b) { r'gOVi4t1*
data[k] = temp[i++]; {v3P9s(
a = temp; yDNOtC|
} else { 1}~(Yj@f%
data[k] = temp[j--]; 4Qn$9D+?
b = temp[j]; K98i[,rP
} YKQr, Now
} uwlr9nB
} iiK]l
Sna4wkbS
/** }1IpON
* @param data `({T]@]V
* @param l LdJYE;k Ju
* @param i ! VjFW5'{
*/ Sp@-p9#
private void insertSort(int[] data, int start, int len) { V59(Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kQ]$%Lk[
} ,@5I:X!rR
} v+99 -.
} F2X0%te
} m.,U:>
I!^O)4QRx
堆排序： fFQ|T:vm
p,"g+ MwP
package org.rut.util.algorithm.support; 6AocmR0D'
4`,j=3
import org.rut.util.algorithm.SortUtil; Dc)dE2
s.8{5jVG
/** :6%Z]tt
* @author treeroot B7imV@<
* @since 2006-2-2 s&j-\bOic9
* @version 1.0 =hl}.p
*/ v$^Z6>vVI
public class HeapSort implements SortUtil.Sort{ NO :a;
rx}r~0i
/* (non-Javadoc) GgKEP,O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )p*}e8L
*/ ;| 1$Q!4
public void sort(int[] data) { <tioJG{OT
MaxHeap h=new MaxHeap(); O#I1V K
h.init(data); Sfdu`MQR
for(int i=0;i h.remove(); *g^x*|f6
System.arraycopy(h.queue,1,data,0,data.length); ,i@X'<;y
} +@r*}
<F04GO\
private static class MaxHeap{ "jw<V,,
T1H"\+
void init(int[] data){ OrK&RC
this.queue=new int[data.length+1]; P9 Z}H(?C
for(int i=0;i queue[++size]=data; )2M>3C6>f
fixUp(size); ~y7jCcd`
} W5R\Q,x6
} K<>sOWZ'S
@e{^`\l=<
private int size=0; =G]@+e
Dih3}X&jn$
private int[] queue; {AQ=<RDRF
#Qkroji qw
public int get() { fum0>tff
return queue[1]; Tgl}
} A<ynIs<
G$sA`<<
public void remove() { 71l%MH
SortUtil.swap(queue,1,size--); !kC*g
fixDown(1); 4ni3kmvX
} k?7 X3/O
file://fixdown )rixMl &[
private void fixDown(int k) { edPUG N
int j; IY*EA4>
while ((j = k << 1) <= size) { B-r0"MX&
if (j < size %26amp;%26amp; queue[j] j++; M>/Zbnq
if (queue[k]>queue[j]) file://不用交换 aCL!]4K84$
break; &y#r;L<9
SortUtil.swap(queue,j,k); VJS8)oI~
k = j; +$Rt+S BD
} )(@Hd
} 7hcNf,
private void fixUp(int k) { e#k<d-sf6
while (k > 1) { dh $bfAb
int j = k >> 1; h?pkE
if (queue[j]>queue[k]) D:K4H+ch
break; nWHa.H#
SortUtil.swap(queue,j,k); =lpQnj"
k = j; @K!&qw
} !Ta>U^7
} ?C/Te)
JwXT%op9RP
} `[n("7,
%$DI^yS
} =yy5D$\
9`9R!=NM
SortUtil： h*<P$t
CJ++?hB]X
package org.rut.util.algorithm; 28=O03q
=J~ x
import org.rut.util.algorithm.support.BubbleSort; &>Vfa
import org.rut.util.algorithm.support.HeapSort; &e8s65`
import org.rut.util.algorithm.support.ImprovedMergeSort; t N2Md}@e
import org.rut.util.algorithm.support.ImprovedQuickSort; wT{nu[=GH*
import org.rut.util.algorithm.support.InsertSort; R,Vd.-5M
import org.rut.util.algorithm.support.MergeSort; /Js7`r=Rx
import org.rut.util.algorithm.support.QuickSort; CH<E,Z C1T
import org.rut.util.algorithm.support.SelectionSort; b?'yAXk
import org.rut.util.algorithm.support.ShellSort; +j4"!:N}B
'f?$"U JF
/** {.?/)
* @author treeroot h3;bxq!q
* @since 2006-2-2 RG4sQ0
* @version 1.0 /7YF mI/0
*/ YSe.t_K2C
public class SortUtil { 9tqF8pb7v
public final static int INSERT = 1; PV=5UyjW
public final static int BUBBLE = 2; Gmz6$^D
public final static int SELECTION = 3; ?pzaG{
public final static int SHELL = 4; 5;{H&O9Q
public final static int QUICK = 5; @n": w2^B
public final static int IMPROVED_QUICK = 6; "T- `$'9
public final static int MERGE = 7; EEW_gFn
public final static int IMPROVED_MERGE = 8; jNC4_q&
public final static int HEAP = 9; eD#hpl
0xXC^jx:
public static void sort(int[] data) { ;I!MLI
sort(data, IMPROVED_QUICK); jXMyPNTK
} xagBORg+Bd
private static String[] name={ Dmu/RD5X:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *~x/=.}
}; 0/oyf]HR
9,"L^W8"k
private static Sort[] impl=new Sort[]{ Kc^;vT>3
new InsertSort(), LoGVwRmoC
new BubbleSort(), Y(cGk#0
new SelectionSort(), W}]%X4<#rN
new ShellSort(), aT$9;
new QuickSort(), Xqm::1(-(
new ImprovedQuickSort(), .>IhN 5
new MergeSort(), MHC^8VL
new ImprovedMergeSort(), wg]j+r@
new HeapSort() yYH0v7vx+
}; |x-S&-
Mwr"~?\\
public static String toString(int algorithm){ ,9o"43D:a|
return name[algorithm-1]; dB5b@9*
} >#y^;/bb
bAm(8nT7w
public static void sort(int[] data, int algorithm) { EB8\_]6XJ
impl[algorithm-1].sort(data); : 7`[$<~E
} h|"9LU4a
Bb"Bg\le,^
public static interface Sort { [ra_ 2R
public void sort(int[] data); G-.^O,%
} A,LuD.8
i?F >+
public static void swap(int[] data, int i, int j) { 2j[&=R/.
int temp = data; DY?Kfvef
data = data[j]; Z7?~S2{c
data[j] = temp; 6 jn3`D
} LmnymcH
} & J2M1z%