[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; Ri?\m!o
} e-D4'lu
int i1=l; 6*1$8G`$8,
int i2=mid+1; _py2kjA6
for(int cur=l;cur<=r;cur++){ &A50'8B2A
if(i1==mid+1) #GqTqHNE<
data[cur]=temp[i2++]; XKLF8~y8A
else if(i2>r) 4?]oV%aP)
data[cur]=temp[i1++]; T<jfAE
else if(temp[i1] data[cur]=temp[i1++]; wFlV=!>,
else iH)Nk^
data[cur]=temp[i2++]; P6?0r_Y
} !eD+GDgE]
} xNdIDj@
$T dC/#7
} -a) T6:e
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改进后的归并排序: %]Cjhs"v
V;9 }7mw
package org.rut.util.algorithm.support; <lFY7'aY
m7 XjP2
import org.rut.util.algorithm.SortUtil; CD?&<NV
(M% ;~y\
/** RLKj u;u
* @author treeroot ~oi_r8K
* @since 2006-2-2 C*wdtEGq
* @version 1.0 rpU/s@%L
*/ v}il(w;O
public class ImprovedMergeSort implements SortUtil.Sort { Da,&+fZI!
B/YcSEY;
private static final int THRESHOLD = 10; VbxAd 2')
jL4>A$
/* By)3*<5a_
* (non-Javadoc) ]O@"\_}
* Xm[Czd]%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hql5oA
*/ `facFt[\
public void sort(int[] data) { {fG|_+tl3o
int[] temp=new int[data.length]; aV|k}H{wt
mergeSort(data,temp,0,data.length-1); Ku%6$C!,
} |>sv8/!
R#6H'TVE
private void mergeSort(int[] data, int[] temp, int l, int r) { Y-&|VE2
int i, j, k; 2lz {_9
int mid = (l + r) / 2; NV!4(_~
if (l == r) Hhf72IX
return; ^HFo3V }h
if ((mid - l) >= THRESHOLD) iK x+6v
mergeSort(data, temp, l, mid); DPPS?~Pq
else dM|g`rr E
insertSort(data, l, mid - l + 1); B82,.?
if ((r - mid) > THRESHOLD) uZ[/%GTX{)
mergeSort(data, temp, mid + 1, r); Oc-u=K,B
else <qn,
insertSort(data, mid + 1, r - mid); H'Iq~Ft1
HU[oR4E
for (i = l; i <= mid; i++) { i=da,W=0
temp = data; 5^|"_Q#:
} LkaG[^tfN
for (j = 1; j <= r - mid; j++) { rUFFF'm\*a
temp[r - j + 1] = data[j + mid]; "#XtDpGk
} y"R("j $
int a = temp[l]; ?cBO6^
int b = temp[r]; QeK{MF
for (i = l, j = r, k = l; k <= r; k++) { T 'i~_R6
if (a < b) { o4'v> b
data[k] = temp[i++]; $n*%v85
a = temp; &l!$Sw-u;
} else { "z/V%ZK~f
data[k] = temp[j--]; ;vUxO<cKFq
b = temp[j]; {h^c
} <[8@5?&&
} " ~n3iNkP
} :C}Hy
yam}x*O\xn
/** BA`:miH<
* @param data UG=I~{L
* @param l <rMv0y+r
* @param i FAd``9kRT
*/ x)\V lR
private void insertSort(int[] data, int start, int len) { '8Qw:fh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5\?3$<1I
} g$gS7!u,
} ^teaJy%
} gD5P!}s[u0
} 9i[4"&K
fn?VNZ`J
堆排序： Okoo(dfM
n>T:2PQ3
package org.rut.util.algorithm.support; ioWJj.%
NE[y|/
import org.rut.util.algorithm.SortUtil; 0&B:\
YME[%c2x
/** y*(_\\
* @author treeroot Q(blW
* @since 2006-2-2 -=>U =|
* @version 1.0 () <`t}FQ
*/ @4@PuWI0-
public class HeapSort implements SortUtil.Sort{ <hMtE/05B
Z{#"-UG
/* (non-Javadoc) NJ>,'s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Za9$Hh/X
*/ :r^klJ(m
public void sort(int[] data) { 9^p32G
MaxHeap h=new MaxHeap(); @jKDj]\
h.init(data); ,N0uR@GN
for(int i=0;i h.remove(); )8bFGX7|
System.arraycopy(h.queue,1,data,0,data.length); !3QRzkJX~
} 'FqEB]gu
km}MqBQl
private static class MaxHeap{ fK);!Hh
w=5
void init(int[] data){ 4y1>
this.queue=new int[data.length+1]; e|~C?Ow'J
for(int i=0;i queue[++size]=data; QK'`=MU
fixUp(size); "]w!`^'_
} +>u>`|
} h$|3dz N
ki`8(u6l
private int size=0; >6k}HrS1V
/'mrDb_ip
private int[] queue; n{L:MT9TD
SF"#\{cjj
public int get() { k=ts&9\
return queue[1]; ;Na^]32
} PaxK^*
AzxL%,_
public void remove() { UDVf@[[hN
SortUtil.swap(queue,1,size--); )7k&`?Mh
fixDown(1); 76$*1jB
} u7n[f@Eg,%
file://fixdown q;ZLaX\bFl
private void fixDown(int k) { d&5c_6oW
int j; >6IXuq
while ((j = k << 1) <= size) { /MhS=gVxM
if (j < size %26amp;%26amp; queue[j] j++; HLM;EZ
if (queue[k]>queue[j]) file://不用交换 _/ct=
break; 5cgo)/3M@}
SortUtil.swap(queue,j,k); )tScc*=8
k = j; ' *}^@[&
} M5F(<,n;
} gA{'Q\
private void fixUp(int k) { ka!Bmv)
while (k > 1) { -}E)M}W
int j = k >> 1; Ri;=aZ5m
if (queue[j]>queue[k]) l 4!kxXf-<
break; [7'#~[a~
SortUtil.swap(queue,j,k); @81-kdTx
k = j; sRi?]9JIl
} 6$;L]<$W>
} (*MNox?w
B>sCP"/uV
} 8W;xi:CC
c%ZeX%p
} E(% XVr0W
AfUZO^<
SortUtil： qQL.c+%L
5dqQws-,?1
package org.rut.util.algorithm; 8^8>qSD1
qw|JJ
import org.rut.util.algorithm.support.BubbleSort; o>@=N2n
import org.rut.util.algorithm.support.HeapSort; sZ]'DH&_(
import org.rut.util.algorithm.support.ImprovedMergeSort; _2]O^$L
import org.rut.util.algorithm.support.ImprovedQuickSort; ;CA ?eI
import org.rut.util.algorithm.support.InsertSort; #FEa 5
import org.rut.util.algorithm.support.MergeSort; UOw~rK
import org.rut.util.algorithm.support.QuickSort; |3S'8OeCI
import org.rut.util.algorithm.support.SelectionSort; NvUu.
import org.rut.util.algorithm.support.ShellSort; ud yAP>
]{(l;k9=e
/** ~B<97x(X
* @author treeroot 09G9nu;&{
* @since 2006-2-2 XO0>t{G
* @version 1.0 z<n"{%
*/ CdDH1[J
public class SortUtil { ^eT@!N
public final static int INSERT = 1; JOJh,8C)6
public final static int BUBBLE = 2; XpR.rq$]
public final static int SELECTION = 3; "EN98^ Sl
public final static int SHELL = 4; UHr{
public final static int QUICK = 5; {cmo^~[L$
public final static int IMPROVED_QUICK = 6; ok%EqO
public final static int MERGE = 7; ,>&?ty9o
public final static int IMPROVED_MERGE = 8; $[j-C9W
public final static int HEAP = 9; 5LO4P>fq
9!5b2!JL
public static void sort(int[] data) { jaK'W
sort(data, IMPROVED_QUICK); aZI>x^X
} 5woIGO3X
private static String[] name={ KLG6QBkj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4sj9Z:
}; +Y^-e.UO
'uPxEu4 >4
private static Sort[] impl=new Sort[]{ Sc%aJ1
new InsertSort(), /z/hUa
new BubbleSort(), *Hxj_
new SelectionSort(), \nC5 ,Rz
new ShellSort(), uFGv%W
new QuickSort(), ?UxG/]",
new ImprovedQuickSort(), BO8%:/37[4
new MergeSort(), cC b>zI
new ImprovedMergeSort(), ;>inT7?3|
new HeapSort() 9@(O\xr
}; uG2Xkj
ARmu{cL
public static String toString(int algorithm){ BXT80a\
return name[algorithm-1]; n"XdHW0
} $|>6z_3%
?+bTPl;%'
public static void sort(int[] data, int algorithm) { Tf9&,!>V
impl[algorithm-1].sort(data); JCM)N8~i
} UN,<6D3\b
-;sJ25(
public static interface Sort { aw%>YrJ
public void sort(int[] data); "CIpo/ebL
} `DI{wqV9
<FXQxM5"
public static void swap(int[] data, int i, int j) { HT{F$27W
int temp = data; 6>@(/mh*
data = data[j]; J%:WLQo
data[j] = temp; bk/.<Rt
} +<'uw
} NFdJb\