[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; UNYqft4
} #e"[^_C@!
int i1=l; "sTRS*
int i2=mid+1; )8AXm
for(int cur=l;cur<=r;cur++){ @]j1:PN-
if(i1==mid+1) A"]YM'.
data[cur]=temp[i2++]; rp$'L7lrX
else if(i2>r) V`- 9m$
data[cur]=temp[i1++]; !g[Zfo2r"
else if(temp[i1] data[cur]=temp[i1++]; >7|VR:U?B
else c)J%`i$
data[cur]=temp[i2++]; TbU#96"~.
} *wearCPeJ
} &~CI<\o P
By|4m
} 7#Ft|5$~q
!0+JbZ<%r|
改进后的归并排序: 'L'R9&o<X
5! {D!
package org.rut.util.algorithm.support; 6Mf0`K
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import org.rut.util.algorithm.SortUtil; sRs>"zAg
dV_G1'
/** ?`s8 pPc4
* @author treeroot e6*8K@LHB
* @since 2006-2-2 _>+Ld6.T6
* @version 1.0 lxx2H1([
*/ RZLq]8pM
public class ImprovedMergeSort implements SortUtil.Sort { FrS]|=LJhX
Ui~>SN>s
private static final int THRESHOLD = 10; @"A4$`Xi3
oR'm2d^
/* [,Gg^*umS
* (non-Javadoc) (QEG4&9
* +7Gwg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pBHRa?Y5
*/ 01]f2.5
public void sort(int[] data) { K-v#.e4
int[] temp=new int[data.length]; D*jM1w_`
mergeSort(data,temp,0,data.length-1); t.<i:#rj>l
} 4?kcv59
y[;>#j$
private void mergeSort(int[] data, int[] temp, int l, int r) { l?e.9o2-
int i, j, k; I7onX,U+
int mid = (l + r) / 2; ="+#W6bZT
if (l == r) z/-=%g >HA
return; d]9z@Pd
if ((mid - l) >= THRESHOLD) 2/?|&[
mergeSort(data, temp, l, mid); ch]IzdD
else #a#F,ZT
insertSort(data, l, mid - l + 1); KlEpzJ98
if ((r - mid) > THRESHOLD) 2y4bwi
mergeSort(data, temp, mid + 1, r); *dQSw)R
else 5pX6t
insertSort(data, mid + 1, r - mid); 9up3[F$
=_CzH(=f#
for (i = l; i <= mid; i++) { 00(\ZUj
temp = data; VY-EmbkG-t
} 6ujWNf
for (j = 1; j <= r - mid; j++) { I9^x,F"E]
temp[r - j + 1] = data[j + mid]; &oNAv-m^GD
} Z,gk|M3.
int a = temp[l]; F9^S"qv$
int b = temp[r]; wYea\^co
for (i = l, j = r, k = l; k <= r; k++) { mh%VrAq
if (a < b) { z{q`GwW
data[k] = temp[i++]; U{mYTN*:j$
a = temp; $nb[GV
} else { UMi~14& ;
data[k] = temp[j--]; W?&%x(6M
b = temp[j]; tQVVhXQ7
} ^iA9%zp
} 7V>M]
} Xw1*(ffk
*~`(RV
/** h[ ZN+M
* @param data i8p6Xht
* @param l jXJyc'm7
* @param i 6BlXLQ,8q
*/ JF]JOI6.e
private void insertSort(int[] data, int start, int len) { sOY:e/_F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +@UV?"d
} _c07}aQ ],
} (FV >m
} (7Qo
} hH.G#-JO
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堆排序： sW$XH1Uf#
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package org.rut.util.algorithm.support; *8q.YuZ
>_} I.\X
import org.rut.util.algorithm.SortUtil; !-bB559Nv
2wn2.\v M
/** `cO:<^%
* @author treeroot 4i bc
* @since 2006-2-2 xw%0>K[
* @version 1.0 7)m9"InDI
*/ 1C.VnzRnJ
public class HeapSort implements SortUtil.Sort{ :UdF
d9ihhqq3}
/* (non-Javadoc) Bvj0^fSm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2%1hdA<
*/ rqq1TRg
public void sort(int[] data) { :k"]5>(^
MaxHeap h=new MaxHeap(); *hrd5na
h.init(data); +\'tE~V
for(int i=0;i h.remove(); L];b<*d
System.arraycopy(h.queue,1,data,0,data.length); rQXzR
} |ZBw<f
*:1ey{w:
private static class MaxHeap{ YIE<pX4Q7)
9uY'E'm*
void init(int[] data){ Tw% 3p=
this.queue=new int[data.length+1]; 13PS2
for(int i=0;i queue[++size]=data; k9R9Nz|J
fixUp(size); a.'*G6~Qgw
} ^.tg7%dJ
} b6[j%(
qR.Q,(b|
private int size=0; N!32 wJ
^8tEach
private int[] queue; C~[,z.FvO
lr?;*f^3
public int get() { SuznN L=/$
return queue[1]; Cw%{G'O
} c,22*.V/
zi:BF60]=
public void remove() { ax2B ]L2
SortUtil.swap(queue,1,size--); ]Dzlp7Y}
fixDown(1); =sFTxd_"iQ
} mmsPLv6
file://fixdown wBzC5T%,
private void fixDown(int k) { 67TwPvh
int j; fVwUe _Y
while ((j = k << 1) <= size) { f::Dx1VcX
if (j < size %26amp;%26amp; queue[j] j++; 'yth'[
if (queue[k]>queue[j]) file://不用交换 B *vM0
break; H]!"Zq k
SortUtil.swap(queue,j,k); >p/`;Kq@
k = j; 51u0]Qx;fm
} Bt#N4m[X*|
} ^{{qV
private void fixUp(int k) { \9d$@V
while (k > 1) { yVc(`,tZ(
int j = k >> 1; "KlwA.7/
if (queue[j]>queue[k]) _m>b2I?
break; ]k(]qZ
SortUtil.swap(queue,j,k); d3Rw!slIq
k = j; ^.G$Q#y,
} Je@v8{][|
} tDo"K3
fnY.ao1-s[
} +#By*;BJ
vy/-wP|1
} ]9XDS[<2`
SaCh 7 ^
SortUtil： :EH=_"
/bEAK-
package org.rut.util.algorithm; G:JR7N$
k8Xm n6X
import org.rut.util.algorithm.support.BubbleSort; C?Ucu]cW
import org.rut.util.algorithm.support.HeapSort; :LTN!jj
import org.rut.util.algorithm.support.ImprovedMergeSort; nm+s{
import org.rut.util.algorithm.support.ImprovedQuickSort; -hV*EPQ/
import org.rut.util.algorithm.support.InsertSort; ]?)TdJ`
import org.rut.util.algorithm.support.MergeSort; <Qq*p
import org.rut.util.algorithm.support.QuickSort; C>~TI,5a3
import org.rut.util.algorithm.support.SelectionSort; />Nt[o[r
import org.rut.util.algorithm.support.ShellSort; xpI wrJO
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/** ^(<f/C)i
* @author treeroot @KA4N`
* @since 2006-2-2 V:27)]q
* @version 1.0 S$k&vc(0
*/ +{>=^9%X
public class SortUtil { $|@ r!/W
public final static int INSERT = 1; PX99uWx5]
public final static int BUBBLE = 2; 9Ee'Cm
public final static int SELECTION = 3; l]cFqLp
public final static int SHELL = 4; a6H%5N
public final static int QUICK = 5; 9akH
public final static int IMPROVED_QUICK = 6; x:7IIvP
public final static int MERGE = 7; {|\.i
public final static int IMPROVED_MERGE = 8; _wOt39e&
public final static int HEAP = 9; iOdpM{~*
fQ98(+6
public static void sort(int[] data) { +O5hH8<&b
sort(data, IMPROVED_QUICK); V+~Nalm O
} +>9Q/E
private static String[] name={ ap~^Ty<>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ewm9\qmg
}; GF WA>5n'
p#[.{
private static Sort[] impl=new Sort[]{ {PmZ9
new InsertSort(), aoTP[Bp
new BubbleSort(), f-2c0Bi
new SelectionSort(), 1U\z5$V
new ShellSort(), "mNq&$
new QuickSort(), ^t"'rD-I
new ImprovedQuickSort(), FN;^"H
new MergeSort(), {e5= &A
new ImprovedMergeSort(), ??T#QQ
new HeapSort() ETLD$=iS
}; oRzi>rr
c|1&lYal;
public static String toString(int algorithm){ |)81Lz
return name[algorithm-1]; {iLT/i%
} s{" 2L{,$
VD:/PL
public static void sort(int[] data, int algorithm) { X7wKy(g
impl[algorithm-1].sort(data); O~QB!<Q+
} `XB 9Mi=
g1o8._f.
public static interface Sort { 3,=6@U
public void sort(int[] data); $g7<Y*t[
} !a<ng&H^U
+MLVbK
public static void swap(int[] data, int i, int j) { gNhQD*+>{
int temp = data; *#Wdc O`-
data = data[j]; @A5?3(e
data[j] = temp; T^v}mWCZ
} >*n0n!vF
} yWya&|D9