[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; 5FKb7
} SHWD@WLE4
int i1=l; +es|0;Z4yP
int i2=mid+1; 9}G.Fr
for(int cur=l;cur<=r;cur++){ AUBZ7*VO
if(i1==mid+1) j S~Wcu
data[cur]=temp[i2++]; DC+p s
else if(i2>r) @'P\c
data[cur]=temp[i1++]; /r2*le (H
else if(temp[i1] data[cur]=temp[i1++]; $I}7EI
else `3GYV|LeQ
data[cur]=temp[i2++]; 3HCH-?U5
} <u`m4w
} Q0l[1;$#
{{N*/E^
} @~1}n/
},#@q_E
改进后的归并排序: l<X8Ooan#{
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package org.rut.util.algorithm.support; d>k)aIYp
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import org.rut.util.algorithm.SortUtil; LlbRr.wL
nz+k ,
/** A43 mX!g\
* @author treeroot 'z\$.L
* @since 2006-2-2 'Sk-L 5
* @version 1.0 ~&{LMf
*/ NW?.Ge.!P
public class ImprovedMergeSort implements SortUtil.Sort { a>6@1liT
u]`ur#_
private static final int THRESHOLD = 10; 5|:t$
[cfKvROG
/* ,;%F\<b
* (non-Javadoc) Z2@_F7cXt
* hsCts@R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7:Cq[u fl
*/ pA?kv]l(
public void sort(int[] data) { nNj<!}HvV
int[] temp=new int[data.length]; ^t0Yh%V7
mergeSort(data,temp,0,data.length-1); jq_E{Dq1
} &[#iM0;)W0
/u&{=nU
private void mergeSort(int[] data, int[] temp, int l, int r) { y*oH"]D
int i, j, k; 25R6>CXsi
int mid = (l + r) / 2; |g)/6jG<-
if (l == r) 5oOF|IYi
return; <4Ev3z*;Z
if ((mid - l) >= THRESHOLD) SOg>0VH)
mergeSort(data, temp, l, mid); BK*Bw,KQ<
else 5yl[#>qt
insertSort(data, l, mid - l + 1); ;:Kd?Tz$
if ((r - mid) > THRESHOLD) x9Oo.[
mergeSort(data, temp, mid + 1, r); fg?4/]*T6
else qi51'@
insertSort(data, mid + 1, r - mid); myq:~^L ;
Ul{{g$
for (i = l; i <= mid; i++) { **KkPjAO?
temp = data; N0mP EF2
} x )w6
for (j = 1; j <= r - mid; j++) { 4).i4]%LH
temp[r - j + 1] = data[j + mid]; SI"y&[iw
} #)BbW40f6
int a = temp[l]; ;)7GdR^K
int b = temp[r]; I 7 B$X=
for (i = l, j = r, k = l; k <= r; k++) { P\k5%
if (a < b) { {3H)c^Q
data[k] = temp[i++]; aK+jpi4?
a = temp; I&Dp~aEM]
} else { rEfo)jod
data[k] = temp[j--]; 7#pu(:T$
b = temp[j]; \2U FJ
} @!np 0#
} K.l7yBm
} [$iKx6\
c7~>uNgJ
/** OA?pBA
* @param data bd& /B&a
* @param l hH3~O`~
* @param i a`t<R
*/ :GBM`f@
private void insertSort(int[] data, int start, int len) { jMUN|(=Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d!z}! :
} (fUpj^E)p
} GUH-$rA
} +[_mSt
} X8uAwHa6F
XUK!1}
堆排序： '2=$pw
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package org.rut.util.algorithm.support; |08'd5
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import org.rut.util.algorithm.SortUtil; "MX9h }7
+J;T= p
/** MUjfqxTT
* @author treeroot HCIS4}lQ
* @since 2006-2-2 K@R * V
* @version 1.0 6aq=h`Y
*/ *^=zQ~
public class HeapSort implements SortUtil.Sort{ DV5K)m&G
WH^^.^(i
/* (non-Javadoc) p?idl`?^3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !QXPn}q^0
*/ M9ACaf@
public void sort(int[] data) { %}/|/=
MaxHeap h=new MaxHeap(); >Y8\I
h.init(data); 29tih{xx
for(int i=0;i h.remove(); 0E^6"nt7N
System.arraycopy(h.queue,1,data,0,data.length); `-)Hot)
} q>5K:5
Q xm:5P
private static class MaxHeap{ eJ3;Sd''
=6H
void init(int[] data){ J]4pPDm
this.queue=new int[data.length+1]; <4%cKW0
for(int i=0;i queue[++size]=data; fMluVND
fixUp(size); ic=tVs
} e?yrx6
} I:=rwnd
8kYI ~
private int size=0; D@?Tq,= [
D\0qlCAs
private int[] queue; 7M,(!*b
<;P40jDL
public int get() { Rn9e#_Az
return queue[1]; ^_5t5>
} 155vY
LCMZw6p
public void remove() { F\Q X=n
SortUtil.swap(queue,1,size--); o~`KOe
fixDown(1); H63?Erh>a
} Cc}3@Nf{/
file://fixdown kK%@cIXS3
private void fixDown(int k) { hq*"S-N
int j; q~6a$8+t
while ((j = k << 1) <= size) { PFI^+';
if (j < size %26amp;%26amp; queue[j] j++; TW~%1G_v
if (queue[k]>queue[j]) file://不用交换 lEXI<b'2
break; a%*W( 4=Y
SortUtil.swap(queue,j,k); x%`tWE|
k = j; BK)3b6L=%
} awU&{<,=g
} oZ\zi> Y,
private void fixUp(int k) { zXaA5rZO
while (k > 1) { DDBf89$\
int j = k >> 1; Nz;f| 2h
if (queue[j]>queue[k]) `dJ?j[P,p
break; ?%ei+
SortUtil.swap(queue,j,k); IylfMwLC
k = j; 0lLg uBW@
} e!N%
} MmH(dp+
<Gj]XAoe%
} fRK=y+gl@
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} 0w!:YB,}
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SortUtil： `N;O6 wZ
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package org.rut.util.algorithm; )^7- qy
3B5 `Y
import org.rut.util.algorithm.support.BubbleSort; S.|%dz
import org.rut.util.algorithm.support.HeapSort; d~;U-
import org.rut.util.algorithm.support.ImprovedMergeSort; GsiT!OP]y
import org.rut.util.algorithm.support.ImprovedQuickSort; ?o`fX wE
import org.rut.util.algorithm.support.InsertSort; >2ny/AK|
import org.rut.util.algorithm.support.MergeSort; Gdv{SCV
import org.rut.util.algorithm.support.QuickSort; `P jS
import org.rut.util.algorithm.support.SelectionSort; plgiQr #
import org.rut.util.algorithm.support.ShellSort; :u|F>e
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/** C^ZDUj`
* @author treeroot Y@MFH>*
* @since 2006-2-2 G5*_
* @version 1.0 6.6x$y3v
*/ +^3 *Y"6Z
public class SortUtil { 9 =D13s(C
public final static int INSERT = 1; e_dsBmTh
public final static int BUBBLE = 2; 'Ooq.jaK;/
public final static int SELECTION = 3; ESi-'R&
public final static int SHELL = 4; G\#dMCk?
public final static int QUICK = 5; (``|5;T\
public final static int IMPROVED_QUICK = 6; LX7<+`aa
public final static int MERGE = 7; ^3ysY24Q
public final static int IMPROVED_MERGE = 8; Bi|-KS.9
public final static int HEAP = 9; vg\fBHzn
ew1bb K>
public static void sort(int[] data) { =po5Q6@i
sort(data, IMPROVED_QUICK); #R#|hw
} hSXZu?/
private static String[] name={ w%eEj.MI|i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zfK3$|
}; cWp5pGIzfp
a]=j
private static Sort[] impl=new Sort[]{ !L@^Zgs|@?
new InsertSort(), fX}dQN~z
new BubbleSort(), g&O!w!T
new SelectionSort(), &W? hCr
new ShellSort(), XT\Q"=FD
new QuickSort(), ,e+S7YX
new ImprovedQuickSort(), /igbn
new MergeSort(), 1VB{dgr
new ImprovedMergeSort(), H~~>ut6`
new HeapSort() +Ec@qP R&
}; s3oQ( wC %
MXynv";<H
public static String toString(int algorithm){ ;\gHFG}
return name[algorithm-1]; Jl{g"N{2u'
} ;{ESo?$*
ef]60OtP
public static void sort(int[] data, int algorithm) { Kr74|W=
impl[algorithm-1].sort(data); OB\jq!"
} ItwJL`
*Zz hN]1
public static interface Sort { zzZK S
public void sort(int[] data); cfUG)-]P~
} Fes/8*-
Schvwlm~i
public static void swap(int[] data, int i, int j) { P~u~`eH*
int temp = data; u;=a=>05IR
data = data[j]; R;F z"J
data[j] = temp; H05U{vR
} A9ru]|?
} 0 A6%!h