[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; ^^O @ [_
} 5Wyo!pRi
int i1=l; zHEH?xZ6sD
int i2=mid+1; [lmghI!
for(int cur=l;cur<=r;cur++){ WlJ$p$I`
if(i1==mid+1) zFn!>Tqe
data[cur]=temp[i2++]; 5Q9nJC{'NN
else if(i2>r) Tf|?j=f
data[cur]=temp[i1++]; V^
else if(temp[i1] data[cur]=temp[i1++]; Xqz\%&G
else R[%ZyQ_
data[cur]=temp[i2++]; Ep.Q&(D >
} ~eVq Fc
} Ui^~A
=FB[<%
} YEg(QOn3Q
a&?SRC'x
改进后的归并排序: vzr?#FG
Vg>\@ C.s
package org.rut.util.algorithm.support; #%=6DHsK
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import org.rut.util.algorithm.SortUtil; ,k,RXgQ
e?V7<7$
/** re$xeq\1P?
* @author treeroot Al0 i{.V
* @since 2006-2-2 '#;%=+=;
* @version 1.0 ;$\?o
*/ KliMw*5(
public class ImprovedMergeSort implements SortUtil.Sort { "IjCuR;#
0|D^_1W`R
private static final int THRESHOLD = 10; tJ_6dH8Y
pKnM=N1f
/* ,"@Tm01os
* (non-Javadoc) vz[-8m:f
* =}$YZuzmU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?3#W7sF
*/ -$; h+9BO
public void sort(int[] data) { b,k%n_&n
int[] temp=new int[data.length]; e Qz_,vTk
mergeSort(data,temp,0,data.length-1); ? 0}M'L
} !bPsJbIo>
!' D1aea5
private void mergeSort(int[] data, int[] temp, int l, int r) { m$bX;F}T
int i, j, k; v}Gpw6
int mid = (l + r) / 2; 1&Fty'p
if (l == r) 4GiHp7Y&A
return; sp2"c"_+
if ((mid - l) >= THRESHOLD) em@bxyMm
mergeSort(data, temp, l, mid); o)(N*tC
else P?zPb'UVqa
insertSort(data, l, mid - l + 1); iut[?#f^
if ((r - mid) > THRESHOLD) @AvDV$F
mergeSort(data, temp, mid + 1, r); qG=>eRR
else 9L"Z ~CUL
insertSort(data, mid + 1, r - mid); wa#$9p~Q
fpDx)lQ
for (i = l; i <= mid; i++) { #]~l]Eq
temp = data; L,m'/}$
} :3uCW1
for (j = 1; j <= r - mid; j++) { hJkSk;^
temp[r - j + 1] = data[j + mid]; J0 [^hH
} `YK2hr
int a = temp[l]; WeqE9@V
int b = temp[r]; 'T '&OA
for (i = l, j = r, k = l; k <= r; k++) { iEA$`LhO\A
if (a < b) { )YKnFSm
data[k] = temp[i++]; Xf4
a = temp; #dvH0LX?
} else { o|tq&&! <
data[k] = temp[j--]; o!\Q,
b = temp[j]; ')bas#=uP
} HFtl4P
} ed=pRb
} s!vvAD;\
\NiW(!Z}
/** ?^8CD.|
* @param data xbN)z
* @param l zQ&k$l9
* @param i .tg2HKD_lW
*/ .IO_&^
private void insertSort(int[] data, int start, int len) { k2"DFXsv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CJDnHuozc
} >nqDUGnEo>
} @1`!}.Tk
} o~aK[
} ZQ%4]=w
oCCTRLb02
堆排序： #|ppW fZQ
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package org.rut.util.algorithm.support; Y<x;-8)*
#><P28m
import org.rut.util.algorithm.SortUtil; ]uikE2nn
lj U|9|v
/** w,6zbI/
* @author treeroot WN5`zD$
* @since 2006-2-2 b3h3$kIYN
* @version 1.0 p4Wy2.&Q
*/ 8)NQt$lWp
public class HeapSort implements SortUtil.Sort{ ^`HP&V
2"'<Yk9
/* (non-Javadoc) E1=WH-iA0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xw>\6VNt
*/ oHW:s96e
public void sort(int[] data) { *_qW;l7
MaxHeap h=new MaxHeap(); E#0_y4
h.init(data); >Q`\|m}x)Q
for(int i=0;i h.remove(); )jS9p~FS
System.arraycopy(h.queue,1,data,0,data.length); hk +@ngh%
} (i 3=XfZ!C
SY[7<BUZ
private static class MaxHeap{ ;$VQRXq
SZ;Is,VgU4
void init(int[] data){ ".Z1CBM(
this.queue=new int[data.length+1]; <kmH^viX
for(int i=0;i queue[++size]=data; 2!}:h5
fixUp(size); /"f4aF[
} qwERy{]Sp;
} :4&q2-
&e-MOM2&
private int size=0; #Yqj27&
<r8sZrY
private int[] queue; kn^?.^dVX
hB!>*AsG
public int get() { l2&s4ERqSm
return queue[1]; VJ8"Q
} ]1^F
_#SCjFz
public void remove() { M<%g)jn_
SortUtil.swap(queue,1,size--); f4b`*KGf
fixDown(1); snH9@!cG8
} 77]6_
file://fixdown HW@r1[Y
private void fixDown(int k) { )Rlh[Y& r
int j; 1 m>x5Dbk!
while ((j = k << 1) <= size) { 68!W~%?pR
if (j < size %26amp;%26amp; queue[j] j++; &4dh$w]q
if (queue[k]>queue[j]) file://不用交换 kT=KxS{
break; 0tFR. sS?
SortUtil.swap(queue,j,k); jQV.U~25Q
k = j; 5LkpfmR
} zFFip/z\
} ~+HZQv3Y
private void fixUp(int k) { 5C G ,l
while (k > 1) { ~vL`[JiK
int j = k >> 1; 3SeM:OYq]s
if (queue[j]>queue[k]) dw"Tv~
break; TTfU(w%&P
SortUtil.swap(queue,j,k); Yu`KHvur
k = j; Wf}x"*
} FEF $4)ROv
} T1([P!g*
/Cl=;^)
} Gy3t
-Y{=bZS u
} pSPVY2qKX
(H_YYZ3ZX
SortUtil： B=R9K3f
0wA?.~ L
package org.rut.util.algorithm; l_1y#B-k5
]E:P-xTwaI
import org.rut.util.algorithm.support.BubbleSort; ;;Y>7Kn!u
import org.rut.util.algorithm.support.HeapSort; *%(BE*C}
import org.rut.util.algorithm.support.ImprovedMergeSort; zYz0R:@n+
import org.rut.util.algorithm.support.ImprovedQuickSort; mDG=h6y"V
import org.rut.util.algorithm.support.InsertSort; hb,G'IU
import org.rut.util.algorithm.support.MergeSort; #\{j/{VZ
import org.rut.util.algorithm.support.QuickSort; ` &E-
import org.rut.util.algorithm.support.SelectionSort; 1c2zFBl.&
import org.rut.util.algorithm.support.ShellSort; SXJ]()L?[v
(c'kZ9&
/** /&eF,4
* @author treeroot :mI[fQ
* @since 2006-2-2 vz*'1ugaA
* @version 1.0 ^(:Z*+X~>
*/ %"C%pA
public class SortUtil { ;r1.Uz(
public final static int INSERT = 1; NmH:/xU?^
public final static int BUBBLE = 2; oE;SZ"$x
public final static int SELECTION = 3; d$;1%rRj8
public final static int SHELL = 4; v<Ozr:lL
public final static int QUICK = 5; 0c,)T1NG>
public final static int IMPROVED_QUICK = 6; Vi5&%/Y
public final static int MERGE = 7; R|,F C'
public final static int IMPROVED_MERGE = 8; $Rd]eC
public final static int HEAP = 9; /+p]VHP\
m|%L[h1
public static void sort(int[] data) { ,Qw\w,
sort(data, IMPROVED_QUICK); SBbPO5^](
} h=7eOK]
private static String[] name={ W3h{5\d!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P*kKeMl
}; DH*=IzcJf
vp_$Ft-R
private static Sort[] impl=new Sort[]{ R3<2Z0lqy
new InsertSort(), $YPQi.
new BubbleSort(), x392uS$#
new SelectionSort(), \qA^3L~;5
new ShellSort(), G#f(oGn :
new QuickSort(), @8$3Q,fF(
new ImprovedQuickSort(), (e~vrSk+)~
new MergeSort(), o<f#Zi
new ImprovedMergeSort(), ~Bi{k'A9
new HeapSort() MB#KLTwnT
}; A:JWUx
% njcWVP;
public static String toString(int algorithm){ l0sBXs`3b
return name[algorithm-1]; @XSxoUF\
} K]0K/~>8
)h&*b9[B=
public static void sort(int[] data, int algorithm) { 0D=7Mef
impl[algorithm-1].sort(data); a+_F^
} M?FbBJ`sF
`BGU
public static interface Sort { n@e[5f9?x
public void sort(int[] data); oKlOcws}
} NW*qw q
(r!d4
public static void swap(int[] data, int i, int j) { NU#rv%p
int temp = data; ;<~lzfs
data = data[j]; B;6N.X(K
data[j] = temp; @?gN &Z)I
} iJsa;|2/
} ^;xO-;q