[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; <kXV1@>
} &Pg-|Ql
int i1=l; K&IrTA j}
int i2=mid+1; jw(>@SXz
for(int cur=l;cur<=r;cur++){ 26#Jhb E+
if(i1==mid+1) /.kna4k
data[cur]=temp[i2++]; QJIItx4hE
else if(i2>r) y(3c{y@~X
data[cur]=temp[i1++]; Ma=6kX]
else if(temp[i1] data[cur]=temp[i1++]; }vUlTH
else M?~<w)L}
data[cur]=temp[i2++]; `KJYm|@i
} {[t"O u
} n]C%(v!u3
=Q8H]F
} 8Z4?X%
P-OPv%jyi
改进后的归并排序: S|q!? /jqj
U|Z>SE<k
package org.rut.util.algorithm.support; ')u5l
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import org.rut.util.algorithm.SortUtil; 4$zFR}f
V)1:LLRW
/** zdjM%l);
* @author treeroot {~p7*j^0
* @since 2006-2-2 "?eH=!
* @version 1.0 :m++ iR
*/ TcKvSdr'
public class ImprovedMergeSort implements SortUtil.Sort { `zzKD2y
FSU%?PxO
private static final int THRESHOLD = 10; "h;;.Y8e
( ztim
/* =2nn "YVP
* (non-Javadoc) wsJ%* eYf
* #mRFUA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,bVS.A'o
*/ [UJEU~XC
public void sort(int[] data) { TXJY2J*24
int[] temp=new int[data.length]; c.8((h/
mergeSort(data,temp,0,data.length-1); iIGI=EwZ
} A`x -L
@k+%y'Y?
private void mergeSort(int[] data, int[] temp, int l, int r) { q M_/
int i, j, k; ne"?90~
int mid = (l + r) / 2; x!C8?K=|
if (l == r) W%>i$:Qq
return; ,5\2C{
if ((mid - l) >= THRESHOLD) KZrMf77=
mergeSort(data, temp, l, mid); +=6RmId+X
else CP]S-o}yd
insertSort(data, l, mid - l + 1); =CjNtD2]
if ((r - mid) > THRESHOLD) ljYpMv.>xG
mergeSort(data, temp, mid + 1, r); aVppOxA
else -3G 4vRIo
insertSort(data, mid + 1, r - mid); 97(Xu=tX
S$jV|xKB
for (i = l; i <= mid; i++) { <}EV*`w4
temp = data; B?;' lDz*
} -Wlp=#9
for (j = 1; j <= r - mid; j++) { ]>)u+|
temp[r - j + 1] = data[j + mid]; C(V[wvL
} ~[|V3h4v
int a = temp[l]; L$29L:
int b = temp[r]; $(@o$%d
for (i = l, j = r, k = l; k <= r; k++) { "?.'{,Q
if (a < b) { Q%& _On
data[k] = temp[i++]; WxVn&c\
a = temp; ':4}O#
} else { +}7Ea:K
data[k] = temp[j--]; &c!j`86y*
b = temp[j]; j\`EUC
} [lNqT1%]
} PTbA1.B
} Pt6hGSo.
EjR_-8@FK
/** CxbSj,
* @param data *GbVMW[A>
* @param l RgB6:f,
* @param i 'yPCZ`5H(
*/ .3lGX`d{
private void insertSort(int[] data, int start, int len) { Mw"xm9(Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V#'26@@
} $J QWfGwR
} U1,~bO9
} 0?lp/|K
} ~L%Pz0Gg
oA4D\rn8"
堆排序： `Yx-~y5X
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package org.rut.util.algorithm.support; ,vPe}OKj
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import org.rut.util.algorithm.SortUtil; 4S,.R
nu&_gF,{
/** b8J@K"
* @author treeroot Y{B9`Z
* @since 2006-2-2 RAIVdQ}.Z
* @version 1.0 0a"igH}
*/ D JLiZS
public class HeapSort implements SortUtil.Sort{ vkd[:CC
B4]AFRI
/* (non-Javadoc) ,CJAzGBS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )W&o?VRfO
*/ GWF/[%
public void sort(int[] data) { qbS'|--wH
MaxHeap h=new MaxHeap(); &/Eg2
h.init(data); TZ?Os4+
for(int i=0;i h.remove(); uYFMv=>j
System.arraycopy(h.queue,1,data,0,data.length); Y,k(#=wg
} wYZT D*A2h
u~s Sk
private static class MaxHeap{ iO!27y
tIq>Oojdx
void init(int[] data){ *)limqe3"$
this.queue=new int[data.length+1]; ?h/xAl
for(int i=0;i queue[++size]=data; e8$l0gzaD
fixUp(size); 3`8dii
} yGU .AM
} MaZM%W8Z
exfmq
private int size=0; 86 *;z-G
`AWy!}8
private int[] queue; y Wpi|
Lj}>Xy(7<
public int get() { ;W]D ~X&
return queue[1]; &!ED# gs
} ?2{bKIV_
_|N}4a
public void remove() { 3pvYi<<D'
SortUtil.swap(queue,1,size--); !X^Hi=aV
fixDown(1); :6XguU
} /\na;GI$
file://fixdown 6gXIt9B.h$
private void fixDown(int k) { l0I}&,+
int j; vt//)*(.$
while ((j = k << 1) <= size) { ujU=JlJ7dl
if (j < size %26amp;%26amp; queue[j] j++; g %f*ofb
if (queue[k]>queue[j]) file://不用交换 &J_Z~^
break; vu=me?m?(
SortUtil.swap(queue,j,k); 7 _`L$<-n
k = j; J , V
} pgT9hle/
} [`d$X^<y;
private void fixUp(int k) { p8Iw!HE
while (k > 1) { 7_-w_"X
int j = k >> 1; 3P1&;
if (queue[j]>queue[k]) ~ |6dH
break; :M06 ;:e
SortUtil.swap(queue,j,k); (ab{F5
k = j; !BDUv(
} 2K;#Evn'j
} Z1M>-[j)
Frk cO
} F!JJ6d53y
BPqk"HG]T
} cB#nsu>
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SortUtil： []|;qHhC~(
D3`}4 A
package org.rut.util.algorithm; Br}h/!NU/
\i!Son.<
import org.rut.util.algorithm.support.BubbleSort; ,|+Gls
import org.rut.util.algorithm.support.HeapSort; vv6?V#{
import org.rut.util.algorithm.support.ImprovedMergeSort; j Fma|y
import org.rut.util.algorithm.support.ImprovedQuickSort; EM@;3.IO
import org.rut.util.algorithm.support.InsertSort; ibJHU@l
import org.rut.util.algorithm.support.MergeSort; -T7xK/
import org.rut.util.algorithm.support.QuickSort; v!H:^!z
import org.rut.util.algorithm.support.SelectionSort; 7{f_fkbs
import org.rut.util.algorithm.support.ShellSort; [*)Z!)
ZU^IH9
/** I^D0<lHl~
* @author treeroot w1r$='*I
* @since 2006-2-2 'CXRG$D
* @version 1.0 %K(0W8&
*/ LvJGvj
public class SortUtil { K^zDNIQU
public final static int INSERT = 1; 6"U8V?E
public final static int BUBBLE = 2; -I":Z2.fR
public final static int SELECTION = 3; C9qJP^F
public final static int SHELL = 4; 3NIUW!gr
public final static int QUICK = 5; +R6a}d/K
public final static int IMPROVED_QUICK = 6; n-o3
public final static int MERGE = 7; DdSSd@,x*
public final static int IMPROVED_MERGE = 8; |9Yi7.
public final static int HEAP = 9; `Gd$:qV
!g>.i`
public static void sort(int[] data) { ]u#JuX
sort(data, IMPROVED_QUICK); &.Q8Mi aT
} ymWgf6r<
private static String[] name={ ;;Ds
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {fV}gR2
}; :m'+tGs
vMla'5|l
private static Sort[] impl=new Sort[]{ NOt@M
new InsertSort(), iWE)<h
new BubbleSort(), -Xz&}QA
new SelectionSort(), 5l DFp9
new ShellSort(), ]XeO0Y
new QuickSort(), C5W>W4EM
new ImprovedQuickSort(), b.F^vv"]]
new MergeSort(), :?Y$bX}a
new ImprovedMergeSort(), 5\Fz!
new HeapSort() {_#yz\j
}; hXn3,3f3oZ
YE}s
public static String toString(int algorithm){ 4=Gph
return name[algorithm-1]; uS+k^ #
} J:j<"uPm
F7MzCZvu
public static void sort(int[] data, int algorithm) { ]XA4;7
impl[algorithm-1].sort(data); ,FZT~?
} 06*rWu9P3
`zpbnxOL$T
public static interface Sort { ^YvB9XN
public void sort(int[] data); g~S)aU\:,
} %."@Q$lA
N^w'Hw0
public static void swap(int[] data, int i, int j) { 1tMQqI`N
int temp = data; !k&Q 5s:
data = data[j]; @}s$]i$|-
data[j] = temp; 6rN(_Oi-
} B[5r|d'
} xJZ@DR,#