[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; )UO:J7K
} FU E/uh
int i1=l; OXK?R\ E+
int i2=mid+1; ZjF$zVk
for(int cur=l;cur<=r;cur++){ ~ucOQVmz@
if(i1==mid+1) .yd{7Te
data[cur]=temp[i2++]; 80x %wCY`
else if(i2>r) 0bVtku K;G
data[cur]=temp[i1++]; FDkRfhK
else if(temp[i1] data[cur]=temp[i1++]; VX2KE@
else 1.4]T, `
data[cur]=temp[i2++]; j]6Z*AxQ
} !LVWggk1
} Eo!1 WRruF
e%afK@c
} tK`sVsm>
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改进后的归并排序: .R#p<"$I
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package org.rut.util.algorithm.support; G29PdmY$<
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import org.rut.util.algorithm.SortUtil; ={o>g'
s=! y%
/** <=l!~~%
* @author treeroot qH: ` O%,
* @since 2006-2-2 snK$? 9vh
* @version 1.0 Zm>Q-7r9
*/ k3da*vwE
public class ImprovedMergeSort implements SortUtil.Sort { \SHYwD}*Pr
<!v^Df
private static final int THRESHOLD = 10; y+)][Wa0
3?|Fn8dQR.
/* T2P0(rEz
* (non-Javadoc) !k)}p_e
* ;XMbjWc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zrr3='^s
*/ ;e_dk4_
public void sort(int[] data) { Ou"QUn|
int[] temp=new int[data.length]; vQ#$.*Cvn
mergeSort(data,temp,0,data.length-1); G|Yw a=
} q.yS j
Qx1ZxJz #
private void mergeSort(int[] data, int[] temp, int l, int r) { Oz#$x
int i, j, k; '>^+_|2
int mid = (l + r) / 2; ?}e8g
if (l == r) Og4 X3QG
return; DN2K4%cM%'
if ((mid - l) >= THRESHOLD) >_!pg<{,
mergeSort(data, temp, l, mid); Ok/~E
else m\(4y Gj
insertSort(data, l, mid - l + 1); B$1e AwT9
if ((r - mid) > THRESHOLD) B.-5$4*s
mergeSort(data, temp, mid + 1, r); 9<I@}w
else >9'G>~P~I=
insertSort(data, mid + 1, r - mid); >eQ;\j
(YVl5}V
for (i = l; i <= mid; i++) { G"T)+!6t
temp = data; TRL4r_
} `C%,Nj
for (j = 1; j <= r - mid; j++) { : ~"^st_[!
temp[r - j + 1] = data[j + mid]; =QHW>v
} <W2}^q7F^
int a = temp[l]; *91iFeKj=
int b = temp[r]; >"q0"zrN,
for (i = l, j = r, k = l; k <= r; k++) { ^hv
if (a < b) { .+t{o[
data[k] = temp[i++]; ^W5rL@h_
a = temp; bo '
} else { a,b;H(em
data[k] = temp[j--]; VO] Jvf
b = temp[j]; Q^$IlzG7i
} y44FejH(v
} "IA[;+_"
} T8h.!Vef
sesr`,m.,
/** :~3sW< PR
* @param data 1k6f|Al-
* @param l Wp/!;
* @param i *[*LtyCQt4
*/ R/R[r> 1)6
private void insertSort(int[] data, int start, int len) { MNzq,/Wf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Vy.A`Hz
} gV1&b (h
} 4-^|e
} .'mmn5E
} $)\%i=
vmK<_xbwd
堆排序： @+h2R
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package org.rut.util.algorithm.support; bAms-cXm
-%*>z'|{
import org.rut.util.algorithm.SortUtil; 8+{WH/}y8
}`&#{>]2
/** U>7"BpC
* @author treeroot hSSF]
* @since 2006-2-2 0kS[`a(}J
* @version 1.0 WY_}D!O
*/ XeX0\L')R
public class HeapSort implements SortUtil.Sort{ xRpL\4cs
!SEHDRp
/* (non-Javadoc) }@=m[Zx#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Un@B D}@\
*/ 4SCb9|/Q
public void sort(int[] data) { yS p]+
MaxHeap h=new MaxHeap(); .",E}3zn
h.init(data); an={h,
for(int i=0;i h.remove(); wvvMesX<L
System.arraycopy(h.queue,1,data,0,data.length); }WS%nQA
} )` -b\8uw
^Crl~~Gk`
private static class MaxHeap{ ,uqSq
AX}l~ sv
void init(int[] data){ zk=5uKcPE
this.queue=new int[data.length+1]; 9#{?*c6
for(int i=0;i queue[++size]=data; gm~Ka%O|F
fixUp(size); NX&mEz
} km,}7^?F0r
} ZfM(%rx
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private int size=0; L3lf28W
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private int[] queue; QE[ETv
mwVH>3{j
public int get() { ?&EPZqI
return queue[1]; XFeHkU`C
} &:`T!n
34_:.QK-
public void remove() { *L7 ZyERs
SortUtil.swap(queue,1,size--); .>DqdtP[
fixDown(1); +C1/02ZJ
} eyBLgJt8P
file://fixdown pqFgi_2m
private void fixDown(int k) { h~{TCK+I
int j; (.4mX t
while ((j = k << 1) <= size) { wG[X*/v
if (j < size %26amp;%26amp; queue[j] j++; EL$l . v
if (queue[k]>queue[j]) file://不用交换 =Y#)c]`
break; +:pjQ1LsJ
SortUtil.swap(queue,j,k); ~f0Bu:A)
k = j; NF&R}7L
} gd^1c}UZX
} >M[wh>
private void fixUp(int k) { M%pxv6?""{
while (k > 1) { {%X /w'|
int j = k >> 1; RX}6H<5R
if (queue[j]>queue[k]) VeeQmR?u-
break; +168!Jw;
SortUtil.swap(queue,j,k); W(a31d
k = j; `VY -3
} bDVz+*bU}
} (Em^qN
0G ^73Z
} |S[Gg
LPX@oha
} {;1Mud
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SortUtil： S]mXfB(mh
/=&HunaxI
package org.rut.util.algorithm; Q laz3X,P
f{MXH&d 1\
import org.rut.util.algorithm.support.BubbleSort; ,<s'/8Ik
import org.rut.util.algorithm.support.HeapSort; [t/7hx"2t
import org.rut.util.algorithm.support.ImprovedMergeSort; AeR3wua
import org.rut.util.algorithm.support.ImprovedQuickSort; ce-5XqzY@
import org.rut.util.algorithm.support.InsertSort; |1C=Ow*"
import org.rut.util.algorithm.support.MergeSort; 'D(|NYY
import org.rut.util.algorithm.support.QuickSort; H+y(W5|2/X
import org.rut.util.algorithm.support.SelectionSort; 2Sbo7e
import org.rut.util.algorithm.support.ShellSort; kaf4GME]
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/** <|9s{z
* @author treeroot `6;%HbP$W+
* @since 2006-2-2 >utm\!Gac
* @version 1.0 INqD(EG
*/ KR4X&d6
public class SortUtil { B|U*2|e
public final static int INSERT = 1; k"X<gA
public final static int BUBBLE = 2; T {Q]
public final static int SELECTION = 3; ew -5VL
public final static int SHELL = 4; Y1?wf.
public final static int QUICK = 5; NF+^
public final static int IMPROVED_QUICK = 6; It>8XKS
public final static int MERGE = 7; F33&A<(,
public final static int IMPROVED_MERGE = 8; ={P
public final static int HEAP = 9; _tDSG]
a<-NB9o~v
public static void sort(int[] data) { " UaUaSg#
sort(data, IMPROVED_QUICK); 7qj<|US
} 21i?$ uU
private static String[] name={ cnJ(Fv_F$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #vCtH2
}; :MPWf4K2s
h^o>9s/|/H
private static Sort[] impl=new Sort[]{ |^p7:)cy
new InsertSort(), L5$r<t<
new BubbleSort(), X:Z4QqT
new SelectionSort(), ^-Ob($(\
new ShellSort(), +|(-7"
new QuickSort(), :k9n 9
new ImprovedQuickSort(), d Bn/_
new MergeSort(), tDn{;ED<
new ImprovedMergeSort(), Ca}T)]//
new HeapSort() $j=c;+W
}; 6\"g,f
9>,$q"M}?
public static String toString(int algorithm){ Y&M}3H>E
return name[algorithm-1]; fui;F"+1
} {jB& e,
40,u(4.m*
public static void sort(int[] data, int algorithm) { k\(LBZ"vR
impl[algorithm-1].sort(data); pJ)PVo\cV
} !9w3/Gthj
8+'9K%'@qX
public static interface Sort { ('k;Ikut
public void sort(int[] data); #mu3`,9V
} 2_i/ F)W
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public static void swap(int[] data, int i, int j) { 'MZX"t
int temp = data; ?Pg{nlJvq
data = data[j]; PNVYW?l
data[j] = temp; anLSD/'4W
} b5WtL+Z
} 4rkj$