[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; LeTOVgjA|
} $(=0J*ND"
int i1=l; xb22:
int i2=mid+1; 8EBy5X}US
for(int cur=l;cur<=r;cur++){ OoqA`%
if(i1==mid+1) zHu w[
data[cur]=temp[i2++]; \zMx~-2oN
else if(i2>r) 5dXDL~/2p
data[cur]=temp[i1++]; j :$Ruy
else if(temp[i1] data[cur]=temp[i1++]; 4!k0
else .s8u?1b
data[cur]=temp[i2++]; &o]ic(74c?
} aSVR+of
} j+6`nN7L
G%#M17
} 8`GN8F
;T,`m^@zf
改进后的归并排序: A/A;'9
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package org.rut.util.algorithm.support; E$1P H)
*MM8\p_PuT
import org.rut.util.algorithm.SortUtil; OS]FGD3a
N6thbH@
/** *Q XUy
* @author treeroot Y-fDYMm
* @since 2006-2-2 XRx^4]c
* @version 1.0 Yj'/ p
*/ iR39lOr
public class ImprovedMergeSort implements SortUtil.Sort { \>N"{T
yZyB.wT
private static final int THRESHOLD = 10; oH>G3n|U^
L+N;mI8
/* 5`QN<4?%
* (non-Javadoc) dc=~EG-_rM
* 4ynGXJmMlR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U6K!FOND
*/ 9tBE=L=
public void sort(int[] data) { (D~NW*,9
int[] temp=new int[data.length]; $s,Az_bs
mergeSort(data,temp,0,data.length-1); W'3~vQF
} 4E 32DG*
|:b!e
private void mergeSort(int[] data, int[] temp, int l, int r) { >uy(N
int i, j, k; ;/s##7qf
int mid = (l + r) / 2; `Dp_c&9]
if (l == r) Zg;%$ kSQ
return; =OR"Bd:O
if ((mid - l) >= THRESHOLD) <S@XK%
mergeSort(data, temp, l, mid); >m'n#=yap
else 0Ma3
insertSort(data, l, mid - l + 1); KnxK9
if ((r - mid) > THRESHOLD) W>cHZ. _
mergeSort(data, temp, mid + 1, r); m$!Ex}2
else <4,LTB]9-
insertSort(data, mid + 1, r - mid); g7@.Fa.u'!
2{oU5e
for (i = l; i <= mid; i++) { M'>8P6O
temp = data; 7rSads
} 6~.{~+Bd
for (j = 1; j <= r - mid; j++) { B82SAV/O
temp[r - j + 1] = data[j + mid]; cj@ar^=`K
} Zy&?.d[z
int a = temp[l]; "R %3v.Z
int b = temp[r]; Q8?:L<A
for (i = l, j = r, k = l; k <= r; k++) { a=&{B'^G
if (a < b) { ;tG@ 6
data[k] = temp[i++]; lSK<LytB
a = temp; r$<4_*
} else { rfHAz
data[k] = temp[j--]; 1|/-Ff"1@
b = temp[j]; F|! ib5
} F7lzc)
} 56 [+;*
} 6H'W]T&
.F^372hH3
/** JGG(mrvR
* @param data 7L !$hk
* @param l ;+(EmD:Q
* @param i .g8db d
*/ r";;Fk#5
private void insertSort(int[] data, int start, int len) { 9D,/SZ-v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rJw Ws
} U])$#/ v
} vHM,_I{
} s~n@|m9k
} ^udl&>
3u@=]0ZN
堆排序： 0$:jZ/._
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package org.rut.util.algorithm.support; r9y(j z
@D+2dT0[M
import org.rut.util.algorithm.SortUtil; gvCQ![
y$`@QRW
/** Y wu > k
* @author treeroot :`<ME/"YE
* @since 2006-2-2 o3,}X@p
* @version 1.0 \SyG#.$
*/ .Hm1ispq
public class HeapSort implements SortUtil.Sort{ (K`@OwD
K(75)/
/* (non-Javadoc) nk.j7tu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FfpP<(4
*/ eiJ~1HX)
public void sort(int[] data) { {jOV8SVL
MaxHeap h=new MaxHeap(); =BroH\
h.init(data); aK5O0`
for(int i=0;i h.remove(); RZbiiMC>
System.arraycopy(h.queue,1,data,0,data.length); *RJiHcII
} gH:+$FA
$q 9dkt
private static class MaxHeap{ $b`~KMO
Kw87 0n<
void init(int[] data){ |h^]`= 3
this.queue=new int[data.length+1]; >eucQ]
for(int i=0;i queue[++size]=data; r O-=):2
fixUp(size); HC(7,3
} <Wa7$hF
} \Y^GA;AMQQ
"a=dx| Z
private int size=0; 6S&OE k
DW>|'w%
private int[] queue; =cWg39$(I
E@CK.-N|
public int get() { JL!:`#\
return queue[1]; (g3@3.Kk)
} 5j>olz=n}
/33m6+
public void remove() { 9?zi
SortUtil.swap(queue,1,size--); 0T.kwZ8
fixDown(1); >^J
} |H&&80I
file://fixdown h%8C_mA
private void fixDown(int k) { o@uZU4MM
int j; n0%5mTUN
while ((j = k << 1) <= size) { X1FKcWv
if (j < size %26amp;%26amp; queue[j] j++; ]:}x 4O#
if (queue[k]>queue[j]) file://不用交换 6oy[0hj
break; /0(c-Dv
SortUtil.swap(queue,j,k); MoC@n+Q+@
k = j; >TG#
} -fT}Nj\
} 7_CX6:
private void fixUp(int k) { 5 [X,?
while (k > 1) { P 9?I]a)G
int j = k >> 1; -muP.h/
if (queue[j]>queue[k]) I/)*pzt8
break; N?><%fra
SortUtil.swap(queue,j,k); ~'VVCtA
k = j; gPcOm b
} gVI T6"/
} ^a?g~G
X]c>clk,
} X6so)1jJ
r:--DKt
} Q9{f'B
.tA=5QY,
SortUtil： rj/1AK
d-'BT(@:
package org.rut.util.algorithm; f[Xsri
:uB(PeAv*
import org.rut.util.algorithm.support.BubbleSort; Nn-EtM0w
import org.rut.util.algorithm.support.HeapSort; _3zJ.%
import org.rut.util.algorithm.support.ImprovedMergeSort; Iwe
import org.rut.util.algorithm.support.ImprovedQuickSort; i0'g$
import org.rut.util.algorithm.support.InsertSort; F!zGk(Pu
import org.rut.util.algorithm.support.MergeSort; =k##*%
import org.rut.util.algorithm.support.QuickSort; 46gDoSS
import org.rut.util.algorithm.support.SelectionSort; u-@;Q<v$
import org.rut.util.algorithm.support.ShellSort; NS){D7T
z C7b
/** 7}puj%JS /
* @author treeroot tu6<>
* @since 2006-2-2 <6.?:Jj
* @version 1.0 hr`,s!0Y
*/ KskPFXxP
public class SortUtil { 3*#$:waGd
public final static int INSERT = 1; "1%\Fil
public final static int BUBBLE = 2; }%`f%/
public final static int SELECTION = 3; V?"1&m&E
public final static int SHELL = 4; TTD#ovo'
public final static int QUICK = 5; w}0rDWuR[
public final static int IMPROVED_QUICK = 6; @YbZ"Jb
public final static int MERGE = 7; _V(FHjY
public final static int IMPROVED_MERGE = 8; zuI7Px
public final static int HEAP = 9; 3 EOuJ
FZtT2Z4&i
public static void sort(int[] data) { L b-xc]
sort(data, IMPROVED_QUICK); wo9`-o6
} S~U5xM^s
private static String[] name={ OlX#1W]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =55V<VI
}; 2hY"bpGW
k_`YVsEYP
private static Sort[] impl=new Sort[]{ lw_@(E]E
new InsertSort(), uoTc c|Kc
new BubbleSort(), A9y@v{txN
new SelectionSort(), ]sJjV A
new ShellSort(), Uj^Y\w-@Z
new QuickSort(), j+[oZfH
new ImprovedQuickSort(), |}Mthj9n
new MergeSort(), ?KG4Z
new ImprovedMergeSort(), ~(]'ah,
new HeapSort() Au"BDP
}; TGuCIc0B{
t(1gJZs>kX
public static String toString(int algorithm){ T'a&
return name[algorithm-1]; `a5,5}7v%`
} 6W9lKD_i
/$^SiE+N
public static void sort(int[] data, int algorithm) { {v*X}`.h
impl[algorithm-1].sort(data); F%$lcQ04%
} F`CDv5
Sobp;OZ5
public static interface Sort { 3:bP>l!
public void sort(int[] data); m@"p#pt(_
} Kh{_BdN
(5kL6d2
public static void swap(int[] data, int i, int j) { ~^>g<YR[
int temp = data; (dP9`Na]
data = data[j]; 2XyC;RWJ%
data[j] = temp; DI[
} !eP0b~$/^J
} ,.AXQ#~&`