[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; S?BG_J6A7
} 26x[X.C:
int i1=l; 1 I",L&S1
int i2=mid+1; Ef13Q]9|
for(int cur=l;cur<=r;cur++){ 0Z]!/AsC
if(i1==mid+1) YkQd
data[cur]=temp[i2++]; 1]/.` ]1
else if(i2>r) (0kK_k'T
data[cur]=temp[i1++]; @2v_pJy^
else if(temp[i1] data[cur]=temp[i1++]; =rX>1
else 2SR:FUV/
data[cur]=temp[i2++]; d4z/5Oa
} Hl |z</*+
} 3%=~)7cF
G'aDb/
} tcog'nAz
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改进后的归并排序: Z>#i**
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package org.rut.util.algorithm.support; ^&Y#)II
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import org.rut.util.algorithm.SortUtil; ^@NU}S):yN
@>H75
/** ,UdVNA
* @author treeroot 4x[S\,20
* @since 2006-2-2 07=mj%yV
* @version 1.0 t}/( b/VD
*/ 2P{Gxz<#
public class ImprovedMergeSort implements SortUtil.Sort { [Cv/{f3]u{
,L'zRyP
private static final int THRESHOLD = 10; YQA,f#
P\)iZiGc
/* l_%6
* (non-Javadoc) fw{gx
* Q6I:"2u1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :tv,]05t
*/ C'}KTXiRW
public void sort(int[] data) { W#3Q ^Z?
int[] temp=new int[data.length]; HT1!5
mergeSort(data,temp,0,data.length-1); A1zjPG&]
} x{WD;$J
]~hk6kS8Q
private void mergeSort(int[] data, int[] temp, int l, int r) { !0mI;~q|F
int i, j, k; U}j0D2
int mid = (l + r) / 2; -_eLf#3
if (l == r) $5Ff1{
return; ))'<_nD
if ((mid - l) >= THRESHOLD) ~zNAbaC+>t
mergeSort(data, temp, l, mid); _b;{_g
else y7Df_|Z
insertSort(data, l, mid - l + 1); N_[*H
if ((r - mid) > THRESHOLD) xe&i^+i
mergeSort(data, temp, mid + 1, r); m$T-s|SY
else tT?cBg{
insertSort(data, mid + 1, r - mid); Bh]P{H%
fMyti$1~
for (i = l; i <= mid; i++) { _/5H l`
temp = data; QWHug:c
} 7g}w+p>
for (j = 1; j <= r - mid; j++) { gQ1;],_
temp[r - j + 1] = data[j + mid]; t" Z6[XG
} _MX>#!l
int a = temp[l]; .];=Pu^
int b = temp[r]; (n9gkO&8"
for (i = l, j = r, k = l; k <= r; k++) { `~CQU
if (a < b) { HJYScwjQ;`
data[k] = temp[i++]; HBx=\%;n
a = temp; Z^MNf
} else { !^Y(^RS@
data[k] = temp[j--]; 6MdiY1Lr!K
b = temp[j]; 0T5L_%c
} UH/\
} ,f;}|d:r
} IG9VdDj
~|xA4u5LG
/** yhA6i
* @param data M%;hB*9
* @param l L.0mk_&
* @param i 3]3|
*/ v9O~@v{=
private void insertSort(int[] data, int start, int len) { Q%mB|i|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ':m,)G5&
} ly3\e_z:G
} HcSXsF
} tr}Loq\y
} *CTlOy
(|1A?@sJ#h
堆排序： { W{]L:
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package org.rut.util.algorithm.support; hJ~Uf5Q
7X'u6$i
import org.rut.util.algorithm.SortUtil; k%QpegN
l u%}h7ng
/** 9kS^Abtk
* @author treeroot h/hmlnOQl
* @since 2006-2-2 [>5-$YOT
* @version 1.0 d;9FB[MmOJ
*/ ls:w8&`*
public class HeapSort implements SortUtil.Sort{ ~d*(=G
p/@smke
/* (non-Javadoc) 74k dsgQf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p\aaJ
*/ o;<Xo&
public void sort(int[] data) { mg.kr:
MaxHeap h=new MaxHeap(); 3/W'V,5G6
h.init(data); 3c6b6
for(int i=0;i h.remove(); oij}'|/Jc
System.arraycopy(h.queue,1,data,0,data.length); .qZ~_xkd
} '|p$)yx2
9b"=9y,
private static class MaxHeap{ 9=h'9Wo
^)*-Bo)I
void init(int[] data){ ^J)mH[
this.queue=new int[data.length+1]; !"/n/jz
for(int i=0;i queue[++size]=data; @wo(tf=@P
fixUp(size); 8jo p_PG'
} 90*5 5\>{
} YU5(g^<
J!pygn O
private int size=0; rb+j*5Es
)@Yf]qx+Y<
private int[] queue; mtmjZP(w
Y^}Z>
public int get() { 3L}!RB
return queue[1]; p &"`RS#Z
} W~9tKT4
qjdMqoOCjl
public void remove() { v~V!ayn)wQ
SortUtil.swap(queue,1,size--); [)zP6\I
fixDown(1); ah0`KxO]
} # ,_u_'C*!
file://fixdown ,-d0b0
private void fixDown(int k) { /-+xQn]
int j; MUREiL9L|
while ((j = k << 1) <= size) { _zn.K&I-*k
if (j < size %26amp;%26amp; queue[j] j++; 6vNrBB
if (queue[k]>queue[j]) file://不用交换 J1sv[$9
break; ,J^b0@S
SortUtil.swap(queue,j,k); "haL
k = j; ^!ZC?h!rG
} YS@ypzc/
} J1I ;Jgql(
private void fixUp(int k) { ERE)A-8
while (k > 1) { ^N;.cY
int j = k >> 1; dP<=BcH>f
if (queue[j]>queue[k]) s ;oQS5Y
break; 1o;J,dYu
SortUtil.swap(queue,j,k); xLWwYK
k = j; !1DKLQ
} =JbRu|/
} dq&yf7
s!&#c`=
} 9c#+qH
pU%n]]qF
} p~^D\jR.
'H&2HXw&2
SortUtil： XJ` ]ga
Z/0fXn})
package org.rut.util.algorithm; %gyLCTw
{/(D$"j(S
import org.rut.util.algorithm.support.BubbleSort; 7- ] as$
import org.rut.util.algorithm.support.HeapSort; bg&zo;Ck8T
import org.rut.util.algorithm.support.ImprovedMergeSort; w2Jf^pR
import org.rut.util.algorithm.support.ImprovedQuickSort; sRx63{
import org.rut.util.algorithm.support.InsertSort; y7 3VFb
import org.rut.util.algorithm.support.MergeSort; %]DP#~7[|
import org.rut.util.algorithm.support.QuickSort; ")dH,:#S
import org.rut.util.algorithm.support.SelectionSort; Ax?y
import org.rut.util.algorithm.support.ShellSort; O%(fx!c`
_w/EP
/** D!NQ~'.a=2
* @author treeroot mdmvT~`
* @since 2006-2-2 I^UC&5dC
* @version 1.0 ^~@U]
*/ l(u.I2^o
public class SortUtil { *`\Pr
public final static int INSERT = 1; XY)&}u.
public final static int BUBBLE = 2; Vq5k+3W+
public final static int SELECTION = 3; s(%oTKjt
public final static int SHELL = 4; t.&Od;\[/
public final static int QUICK = 5; !QHFg-=7
public final static int IMPROVED_QUICK = 6; q<[_T
public final static int MERGE = 7; FsV'Cu@!U
public final static int IMPROVED_MERGE = 8; WD2]&g
public final static int HEAP = 9; pP?MWe Eg
cc&axc7I
public static void sort(int[] data) { Xg SxN!I
sort(data, IMPROVED_QUICK); v'qG26
} Co9QW/'i
private static String[] name={ hMUs" <.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GCX G/k?w:
}; E4W -hq~
8a="/J
private static Sort[] impl=new Sort[]{ XKttZOiGT
new InsertSort(), i;jw\ed
new BubbleSort(), u7[ykyV
new SelectionSort(), 9:,\gw>F
new ShellSort(), %Nhx;{
new QuickSort(), ,TPISs
new ImprovedQuickSort(), g[Ib,la_a
new MergeSort(), L%K\C
new ImprovedMergeSort(), c^u"I'#Q
new HeapSort() /X(t1+
}; 8X`tU<Ab
{u\Mj
public static String toString(int algorithm){ e7(ucE
return name[algorithm-1]; TUDr\' @/f
} ? glSC$b
IOoz^/'
public static void sort(int[] data, int algorithm) { \"^w'ng
impl[algorithm-1].sort(data); =fve/_Q~
} sqJSSNt
\ 3?LqJ
public static interface Sort { U,gti,IX^
public void sort(int[] data); ]dk8lZ;bo
} YZ7|K<
8` @G;o
public static void swap(int[] data, int i, int j) { W4e5Rb4~f"
int temp = data; ryCI>vJz
data = data[j]; AvSM^
data[j] = temp; .J.-Mm`.
} I1\a[Xe8E
} T ;vF(