[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; `mw@"
} /J{P8=x}_:
int i1=l; uHz D
int i2=mid+1; f(D?g
for(int cur=l;cur<=r;cur++){ U <4<8'
if(i1==mid+1) M/d!&Bk
data[cur]=temp[i2++]; 9]NsWd^^
else if(i2>r) zCO5`%14
data[cur]=temp[i1++]; *PL+)2ob
else if(temp[i1] data[cur]=temp[i1++]; DKIDLf
else 3p!R4f)GN
data[cur]=temp[i2++]; _3A$zA
} J[LGa:``
} axU!o /m>
aeSy,:
} p4{?Rhb6
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改进后的归并排序: (jY.S|%
HaB=nLAT
package org.rut.util.algorithm.support; n{4&('NRFP
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import org.rut.util.algorithm.SortUtil; ;1{S"UY
N@Slc 0
/** %l:%c
* @author treeroot a^Zn }R r
* @since 2006-2-2 4pA<s-
* @version 1.0 #J2856bzS
*/ ?/dz!{JC
public class ImprovedMergeSort implements SortUtil.Sort { `mCcD
>Cd%tIie*
private static final int THRESHOLD = 10; 7 hnTHL
F;q I^{m2
/* .^JID~<?#
* (non-Javadoc) #"i}wS
* -fUz$Df/R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zpu>T2Tp
*/ ml?+JbLg0
public void sort(int[] data) { 1grrb&K
int[] temp=new int[data.length]; =N7N=xY
mergeSort(data,temp,0,data.length-1); puXJ:yo(
} 1RRvNZW
d9Rj-e1x
private void mergeSort(int[] data, int[] temp, int l, int r) { vNE91
int i, j, k; / d6mlQS
int mid = (l + r) / 2; i7 p#%2
if (l == r) zac>tXU;
return; i9.52
if ((mid - l) >= THRESHOLD) db#y]>^l
mergeSort(data, temp, l, mid); LgUaX
else !\|&E>Gy
insertSort(data, l, mid - l + 1); |":^3
if ((r - mid) > THRESHOLD) b.Y[:R_9&
mergeSort(data, temp, mid + 1, r); =9pFb!KX
else ;PS[VdV
insertSort(data, mid + 1, r - mid); dC,F?^
uu#ALB Jm
for (i = l; i <= mid; i++) { zKiKda%)
temp = data; {Qw,L;R
} IUu[`\b=
for (j = 1; j <= r - mid; j++) { qQpR gzw
temp[r - j + 1] = data[j + mid]; $)7-wCl</
} p(0!TCBs
int a = temp[l]; 7z%zXDe~T[
int b = temp[r]; `]tXQqD
for (i = l, j = r, k = l; k <= r; k++) { AFMAgf{bD
if (a < b) { ,C=Fgxw(
data[k] = temp[i++]; -QZped;?*
a = temp; 4s"8e]q=
} else { ?c>j^}A/N
data[k] = temp[j--]; d>vGx
b = temp[j]; H,H'bd/
} 2@e<II2ha8
} Itz_;+I.Mp
} NaVZ)
L}:u9$w
/** Yj0Ss{Ep
* @param data H3a}`3}U
* @param l {Ja#pt
* @param i d(v )SS
*/ NsJUruN
private void insertSort(int[] data, int start, int len) { !Rsx)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zD)2af
} b,318R8+G
} n$b/@hp$z
} m! p'nP
} |(S=G'AtU
GhpH7%s
堆排序： /ebYk-c
Xv:<sX
package org.rut.util.algorithm.support; UTs0=:+,t
Mw+]*
import org.rut.util.algorithm.SortUtil; YO-O-NEP
.`,YUr$.
/** 26\1tOj Np
* @author treeroot <[a9"G7
* @since 2006-2-2 &p4q# p7,
* @version 1.0 z),l&7
*/ ] YQ*mvI]
public class HeapSort implements SortUtil.Sort{ :_H$*Q=1
Wb*d`hzQ}
/* (non-Javadoc) pQEHWq"Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rcQ?E=V2O
*/ @+xkd(RfN
public void sort(int[] data) { WVwNjQ2PM
MaxHeap h=new MaxHeap(); L"('gc!W
h.init(data); gL}K84T$S
for(int i=0;i h.remove(); LClPAbr
System.arraycopy(h.queue,1,data,0,data.length); ?}lCS7&
} ]qv/+~Qs>
zo]7#
private static class MaxHeap{ /{qr~7k,oQ
NTVG'3o
void init(int[] data){ ^(&:=r.PC
this.queue=new int[data.length+1]; o.k#|q
for(int i=0;i queue[++size]=data; g<{~f
fixUp(size); 0Y"==g+>f
} pK$^@~DE
} teM&[U
0BVMLRB
private int size=0; 5IMh$!/uc
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private int[] queue; Jnv91*>h8
bJ/~UEZw
public int get() { jkPXkysm
return queue[1]; e1+ %c9UQ
} q:nYUW o
Lw!@[;2
public void remove() { 1>|p1YZ"
SortUtil.swap(queue,1,size--); ,P9B8oIq
fixDown(1); !})+WSs'"s
} \ &_ -
file://fixdown >#>YoA@S
private void fixDown(int k) { wmT3 >
int j; BJlF@F#
while ((j = k << 1) <= size) { 9 -TFyZYU
if (j < size %26amp;%26amp; queue[j] j++; J.O;c5wL
if (queue[k]>queue[j]) file://不用交换 7dU X(D,?
break; B`KpaE]
SortUtil.swap(queue,j,k); 8qBw;A)
k = j; _;0:wXib=
} rtUdL,Hx
} G-} zkax
private void fixUp(int k) { !)&-\!M>
while (k > 1) { 6NZf!7,B
int j = k >> 1; &G'R{s&"
if (queue[j]>queue[k]) =@ON>SmPs
break; ^{Mx?]z
SortUtil.swap(queue,j,k); @];Xbbw+c
k = j; Y @K9Hl
} 0e/~H^,SQ
} uHwuw_eK`
}*0%wP
} :!aFfb["
FiFZM
} E>7%/TIl
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SortUtil： i&?~QQP`
Y4b"(ZhM_
package org.rut.util.algorithm; sQt@B#;
2f~s$I&l#
import org.rut.util.algorithm.support.BubbleSort; Ie+z"&0
import org.rut.util.algorithm.support.HeapSort; {~d4;ht1Y
import org.rut.util.algorithm.support.ImprovedMergeSort; bg 7b!t1F
import org.rut.util.algorithm.support.ImprovedQuickSort; g[Yok`e[
import org.rut.util.algorithm.support.InsertSort; zM)o^Fn2
import org.rut.util.algorithm.support.MergeSort; vguqk!eo4
import org.rut.util.algorithm.support.QuickSort; |r3eq4$Am
import org.rut.util.algorithm.support.SelectionSort; ,@>B#%Nz
import org.rut.util.algorithm.support.ShellSort; !X#=Pt[,
y6G[-?"/Q
/** R4qS,2E
* @author treeroot *9*I:Uh57
* @since 2006-2-2 B|!YGfL
* @version 1.0 E7j]"\~i
*/ |pJ.73
public class SortUtil { [.6uw=;o
public final static int INSERT = 1; jPbL3"0A&
public final static int BUBBLE = 2; [9$>N
public final static int SELECTION = 3; KL -8Aj~
public final static int SHELL = 4; wGbD%=
public final static int QUICK = 5; ]bX.w/=
public final static int IMPROVED_QUICK = 6; v'Lckw@G4
public final static int MERGE = 7; W]reQ&<Z
public final static int IMPROVED_MERGE = 8; eBBh/=Zc
public final static int HEAP = 9; lYq R6^
"_5av!;A g
public static void sort(int[] data) { BeplS
sort(data, IMPROVED_QUICK); )~!Gs/w6
} <hS >L1ZSr
private static String[] name={ 9BHl2<&V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @3b0hi4
}; uT;9xV%ch
\N;s@j W
private static Sort[] impl=new Sort[]{ TrHBbyqk
new InsertSort(), PRf2@0ZV
new BubbleSort(), \d v9:X$
new SelectionSort(), 4?d2#Xhs8
new ShellSort(), k.0$~juu
new QuickSort(), |n* I}w^
new ImprovedQuickSort(), b/<n:*$
new MergeSort(), #mtlgK'
new ImprovedMergeSort(), vY.p~3q :)
new HeapSort() ~/gqXT">
}; ;.m"y-
5)EnOT"'
public static String toString(int algorithm){ JkpA \<
return name[algorithm-1]; ];(w8l
} [j:%O|h
=SLJkw&w6
public static void sort(int[] data, int algorithm) { *y.KD4@{
impl[algorithm-1].sort(data); r)h+pga5^E
} zJtYy4jI)
u,/PJg-(!
public static interface Sort { Q%KS$nP9
public void sort(int[] data); N)&3(A@
} _L&C4 <e'
Q2iu}~
public static void swap(int[] data, int i, int j) { Rrk3EL
int temp = data; uv._N6mj
data = data[j]; ][#]4_
data[j] = temp; B;_M52-B
} .K:>`~<)
} G$`/86A)