[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; .U!EA0B
} =Z\q``RBy
int i1=l; *k{Llq
int i2=mid+1; w2s`9
for(int cur=l;cur<=r;cur++){ gP%<<yl
if(i1==mid+1) C'JI%HnQ
data[cur]=temp[i2++]; yKML{N1D
else if(i2>r) QVT0.GzR
data[cur]=temp[i1++]; D!`[fjs6A
else if(temp[i1] data[cur]=temp[i1++]; imM!Me 0TE
else [k7(t|Q{
data[cur]=temp[i2++]; *~PB
} k79OMf<v
} q[U pP`Z%
!VD$uT
} ygz2bHpD~
{!I`EN]
改进后的归并排序: ?NoNg^Of
Ku[q#_7
package org.rut.util.algorithm.support; O60T.MM`
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import org.rut.util.algorithm.SortUtil; =oSD)z1c?x
ToHx!,tDS
/** <aPZE6z
* @author treeroot AF:_&gF
* @since 2006-2-2 L` [iI
* @version 1.0 4rhHvp
*/ !!.@F;]W
public class ImprovedMergeSort implements SortUtil.Sort { R~=c1bpdq
94!} Z>
private static final int THRESHOLD = 10; 3cJ'tRsp<
zTue(Kr
/* gbdzS6XW~
* (non-Javadoc) pW[TufTa
* \(??Ytc<B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "/R?XCBZsb
*/ e/4C` J-
public void sort(int[] data) { Ktk?(49
int[] temp=new int[data.length]; ZKI8x1>Iq
mergeSort(data,temp,0,data.length-1); @0@WklAJA
} 3uw3[ SR1
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private void mergeSort(int[] data, int[] temp, int l, int r) { U>n[R/~]
int i, j, k; c6b51)sQ"
int mid = (l + r) / 2; hrX/,D -c
if (l == r) @CM5e!
return; 7jw+o*;
if ((mid - l) >= THRESHOLD) <mJ8~
mergeSort(data, temp, l, mid); }>iNT.Lvd
else gR/?MJ(v
insertSort(data, l, mid - l + 1); ?* +>T@MH
if ((r - mid) > THRESHOLD) ;QVTb3Th
mergeSort(data, temp, mid + 1, r); eSZ':p
else [$} \Gv
insertSort(data, mid + 1, r - mid); w.rcYywI
`j3 OFC{7E
for (i = l; i <= mid; i++) { # a4OtRiI
temp = data; F^.]g@g.|
} uju'Bs7
for (j = 1; j <= r - mid; j++) { me@`;Q3
temp[r - j + 1] = data[j + mid]; E#d~.#uH
} ;0|:.q
int a = temp[l]; 8@doKOA~T
int b = temp[r]; CY=lN5!J
for (i = l, j = r, k = l; k <= r; k++) { tW!*W?
if (a < b) { p/eaO{6 6
data[k] = temp[i++]; 3;jxIo$,
a = temp; !5'4FUlJ
} else { ld"rL6
data[k] = temp[j--]; J3'q.Pc
b = temp[j]; Y9-F\t=~
} 3zmbx~| =\
} s-IM
} VL5VYv=:
!ni 1 qM
/** d=D#cs;\
* @param data W8x&:5Fc)3
* @param l tZx}/&m-
* @param i Af@\g-<W_
*/ HNc/p4z
private void insertSort(int[] data, int start, int len) { BK)<~I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Xe:rPxZf~
} [jCYj0Qf8
} T#6g5Jnsp
} Z0v?3v}9^
} >S0kiGDV{
i`<L#6RBT
堆排序： QrFKjmD<
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package org.rut.util.algorithm.support; |Vlx:
"1XTgCu\
import org.rut.util.algorithm.SortUtil; SmvMjZ+7Y
O3T7O`H[
/** \ntUxPox.
* @author treeroot +Q"~2_q5/;
* @since 2006-2-2 _cC!rq U1
* @version 1.0 R i,_x
*/ WrRY3X
public class HeapSort implements SortUtil.Sort{ FG!hb?_1
3G<4rH]
/* (non-Javadoc) Qv'x+GVW]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V?0IMc
*/ g]N'6La
public void sort(int[] data) { VpB)5>
MaxHeap h=new MaxHeap(); K0B<9Wi|
h.init(data); ?*xH HI/
for(int i=0;i h.remove(); 01&E.A
System.arraycopy(h.queue,1,data,0,data.length); |N)),/R_
} _Yp~Oj
gs/ocu
private static class MaxHeap{ .}Xf<G&
%{3q=9ii
void init(int[] data){ _emW#*V
this.queue=new int[data.length+1]; f)a0!U 44
for(int i=0;i queue[++size]=data; ZQ*Us*9I
fixUp(size); 8HZ+r/j
} WcM\4q@
} Wi!"Vcn
$)X8'1%6
private int size=0; GP %hf{
34N~<-9AY
private int[] queue; dkDPze9l
[.Kp/,JY
public int get() { &dK!+
return queue[1]; 79d(UG'O
} nfGI4ZE
nP*%N|0
public void remove() { gVR]z9
SortUtil.swap(queue,1,size--); +w?R4Sxjn
fixDown(1); mK"s*tD
} y@LiUe5
file://fixdown &(32s!qH
private void fixDown(int k) { idX''%"
int j; RB%y($
while ((j = k << 1) <= size) { uZJfIC<>
if (j < size %26amp;%26amp; queue[j] j++; d(ypFd9z
if (queue[k]>queue[j]) file://不用交换 NIbK3`1
break; t:vBVDkD
SortUtil.swap(queue,j,k); 0{8L^ jB/
k = j; rvd%z7Z1o
} CAs:>s '8
} {Y Y,{H
private void fixUp(int k) { r@Jy*2[-Jq
while (k > 1) { 2ag8?#
int j = k >> 1; ~) w4Tq
if (queue[j]>queue[k]) -rm[.
break; /"u37f?[^
SortUtil.swap(queue,j,k); h"0)spF"d
k = j; &g^*ep~|#
} +FqE fY4j
} zhFm2
(?JdiY/
} Km%L1Cd]
*tEqu%N1'
} :Ez,GAk
X|eZpIA45
SortUtil： xLOQu.
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package org.rut.util.algorithm; 1nskf*Z
sTlel&
import org.rut.util.algorithm.support.BubbleSort; \'*M }G
import org.rut.util.algorithm.support.HeapSort; }shxEsq
import org.rut.util.algorithm.support.ImprovedMergeSort; KbvMp1'9P
import org.rut.util.algorithm.support.ImprovedQuickSort; eJHh}
import org.rut.util.algorithm.support.InsertSort; G`>]ng
import org.rut.util.algorithm.support.MergeSort; Im/tU6ybV
import org.rut.util.algorithm.support.QuickSort; _J W|3q
import org.rut.util.algorithm.support.SelectionSort; 'OziP
import org.rut.util.algorithm.support.ShellSort; oYStf5
RK|*yt"f"
/** p.=9[`
* @author treeroot }>0>OqvF
* @since 2006-2-2 V\<2oG
* @version 1.0 CYW@Km{e
*/ bP9ly9FH
public class SortUtil { NSB6 2
public final static int INSERT = 1; tn5
public final static int BUBBLE = 2; G!r)N0?_f
public final static int SELECTION = 3; !ou#g5Q@z
public final static int SHELL = 4; .=#jdc/
public final static int QUICK = 5; mSxn7LG
public final static int IMPROVED_QUICK = 6; U-u?oU-.'
public final static int MERGE = 7; +)jll#}?
public final static int IMPROVED_MERGE = 8; UlE%\L0GD&
public final static int HEAP = 9; rXX>I;`&
!`Rh2g*o9
public static void sort(int[] data) { @9gZH_ur>E
sort(data, IMPROVED_QUICK); vv @m{,7#Y
} E s5:S#
private static String[] name={ [fa4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :/;/mHG]
}; `NsjtT'_
`R[ZY!=+
private static Sort[] impl=new Sort[]{ G-Tmk7m
new InsertSort(), |/*Pimk
new BubbleSort(), }6c>BU}DF
new SelectionSort(), H0Pxw P>q
new ShellSort(), LSJ?;Zg(=z
new QuickSort(), tF0jH+7J-
new ImprovedQuickSort(), lS.Adl^k
new MergeSort(), u#E'k KGO
new ImprovedMergeSort(), }9'`3vsJ
new HeapSort() RwWg:4
}; 8vY-bm,e
'jtC#:ePK
public static String toString(int algorithm){ Ic#xz;elM
return name[algorithm-1]; bV_nYpo
} kz"uTJK
rVYoxXv
public static void sort(int[] data, int algorithm) { %fqR
impl[algorithm-1].sort(data); /~[Lr
} N4!`iS Y
C9n%!()>
public static interface Sort { Wy}I"q[~So
public void sort(int[] data); iQwQ5m!d &
} Sjpx G@k
>gk_klLh
public static void swap(int[] data, int i, int j) { :S+K\
int temp = data; |cPHl+$nh.
data = data[j]; y>^^.
data[j] = temp; )h!cOEt
} '$K E=Jy
} "F<CGSo