[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; ^N}~U5
} <+1w'-
int i1=l; ZD] '$
int i2=mid+1; q$2taG}
for(int cur=l;cur<=r;cur++){ *,*:6^t
if(i1==mid+1) !)*T
data[cur]=temp[i2++]; fz?Wr: I
else if(i2>r) *y\tnsU
data[cur]=temp[i1++]; JjO/u>A3;7
else if(temp[i1] data[cur]=temp[i1++]; @Q1F#IU
else $O</akn;
data[cur]=temp[i2++]; \,IDLXqp
} HgBEV
} qx<zX\qI6n
N+@@EOmH
} nF[eb{GR`
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改进后的归并排序: qA_DQ):
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package org.rut.util.algorithm.support; Kmf-l*7}
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import org.rut.util.algorithm.SortUtil; =<W[dV=W
hB<z]sl
/** C00*X[p
* @author treeroot kC#B7*[RM
* @since 2006-2-2 Ex&RR< 5
* @version 1.0 (i~%4w=
*/ D '_#?%3^
public class ImprovedMergeSort implements SortUtil.Sort { Yiw^@T\H`
[x()^{;2
private static final int THRESHOLD = 10; 6!=9V0G~
|0pBBDw
/* UY& W]
* (non-Javadoc) {$eZF_}Y^
* >v4~:n2D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W)P_t"'@L
*/ #7:9XID /
public void sort(int[] data) { rW>'2m6HU
int[] temp=new int[data.length]; >0okb3+
mergeSort(data,temp,0,data.length-1); gwjv&.T6^
} )Zr0_b"V:e
R =c
private void mergeSort(int[] data, int[] temp, int l, int r) { #^[N4uV
int i, j, k; 6h*bcb#C
int mid = (l + r) / 2; J3JRWy@?P
if (l == r) iQj{J1V
return; E|}Nj}(*
if ((mid - l) >= THRESHOLD) j%<@uiu
mergeSort(data, temp, l, mid); 3~09)0"!d
else lxJ.h&"P
insertSort(data, l, mid - l + 1); wDTV /"Y
if ((r - mid) > THRESHOLD) ~SUl,Cs
mergeSort(data, temp, mid + 1, r); ^?0,G>I%-
else F(n))`(
insertSort(data, mid + 1, r - mid); ",@g
v%e"4:K}?
for (i = l; i <= mid; i++) { 8@#Y <{
temp = data; 8[p6C Jl)
} !8M'ms>s=
for (j = 1; j <= r - mid; j++) { 'WgwLE_
temp[r - j + 1] = data[j + mid]; o|im
} o) ?1`7^BA
int a = temp[l]; @8d})X33
int b = temp[r]; _C#()#
for (i = l, j = r, k = l; k <= r; k++) { H~K2`Cr)4
if (a < b) { <NsT[r~C
data[k] = temp[i++]; Nfvg[c
a = temp; 6$;)CO!h
} else { 7i8qB462
data[k] = temp[j--]; Yx/~8K_%M?
b = temp[j]; .`=PE&xq
} JEkVj']?
} 9r*T3=u.S
} a8U2c;
F!t13%yeu?
/** laJ%fBWmbi
* @param data w~-d4MNM
* @param l 9!C?2*>A P
* @param i Z'kYf
*/ WU@,1.F:
private void insertSort(int[] data, int start, int len) { PiQs><FK8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Nr+1N83S}
} |*a>6y
} ^%@.Vvz<
} R;ug+N
} IbQ~f+y&2
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堆排序： m$: a|'mS
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package org.rut.util.algorithm.support; o~>go_Y
7FFYSv,[:
import org.rut.util.algorithm.SortUtil; }7v2GfEkM
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/** jX,~iZ_B
* @author treeroot fs12<~+z
* @since 2006-2-2 A1;t60z+q>
* @version 1.0 Q;M\P/f
*/ m"}G-#
public class HeapSort implements SortUtil.Sort{ C5 !n{
R>q'Ymu~
/* (non-Javadoc) ".Ug A\0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wQ.zj`?$(
*/ Zt=X %M|aw
public void sort(int[] data) { 9q{dRS[A
MaxHeap h=new MaxHeap(); Cu7iHhY5
h.init(data); 5xKR ]u
for(int i=0;i h.remove(); Yl= |P`
System.arraycopy(h.queue,1,data,0,data.length); y}`%I&]n
} !7DS
nQ6'yd"
private static class MaxHeap{ ugP R)tDfM
?A>-_B
void init(int[] data){ *k$&Hcr$
this.queue=new int[data.length+1]; i9"1
for(int i=0;i queue[++size]=data; \_'pUp22
fixUp(size); 9-SXu lgu
} &YMj\KmlSg
} uuB\~ #?T
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private int size=0; fok#D>q
K-5)Y+| >
private int[] queue; &x #5-O'
>?KyPp
public int get() { KS_d5NvYl
return queue[1]; Q0-~&e_'
} 2{N0. |5
0qd`Pf
public void remove() { `^[ra%a
SortUtil.swap(queue,1,size--); yhmW-#+^e
fixDown(1); 'r CR8>k
} h,g~J-x`|
file://fixdown ZAwl,N){
private void fixDown(int k) { w@We,FUJN
int j; j!dklQh0
while ((j = k << 1) <= size) { \ZH=$c*W
if (j < size %26amp;%26amp; queue[j] j++; ,sK-gw
if (queue[k]>queue[j]) file://不用交换 }S4Fy3)
break; UHWunI S
SortUtil.swap(queue,j,k); d8po`J#nb
k = j; ZW"J]"A
} $mlcaH
} #'P&L>6 ;
private void fixUp(int k) { &s5*akG
while (k > 1) { Y*f<\z(4
int j = k >> 1; LTHS&3%2
if (queue[j]>queue[k]) S;~_9i]upe
break; Jt"Wtr
SortUtil.swap(queue,j,k); V96BtVsB
k = j; W0k_"uI
} 2~ a4ib
} ly2R8$Y`y`
f63q
} KtE`L4tW6
/~:ztv\$M"
} 78wcMQNX9
BlCKJp{m$
SortUtil： s0SB!-Vjm
A6VkVJZx
package org.rut.util.algorithm; >e%Po,Fg$
<V{BRRx
import org.rut.util.algorithm.support.BubbleSort; X+iULr.^`~
import org.rut.util.algorithm.support.HeapSort; t<tBOesQ
import org.rut.util.algorithm.support.ImprovedMergeSort; y5I7pbe
import org.rut.util.algorithm.support.ImprovedQuickSort; ~7v^7;tT
import org.rut.util.algorithm.support.InsertSort; whshjl?a
import org.rut.util.algorithm.support.MergeSort; 2Xosj(H
import org.rut.util.algorithm.support.QuickSort; Rk<:m+V=
import org.rut.util.algorithm.support.SelectionSort; BKk*<WMD
import org.rut.util.algorithm.support.ShellSort; tq[C"| dH
#@G2n@Hj
/** }V{, kK
* @author treeroot iVRz
* @since 2006-2-2 'J}lnt[V
* @version 1.0 9 +6"<r!
*/ H;8(y4;
public class SortUtil { :L,]<n
public final static int INSERT = 1; & CgLF]
public final static int BUBBLE = 2; /e}k7U,^
public final static int SELECTION = 3; 2B#WWb
public final static int SHELL = 4; w}iflAnjq
public final static int QUICK = 5; s*;~CH-[
public final static int IMPROVED_QUICK = 6; UOyP6ej
public final static int MERGE = 7; U4gZW]F
public final static int IMPROVED_MERGE = 8; `#hy'S:e
public final static int HEAP = 9; 2mRso.Ah
B(~D*H2T[
public static void sort(int[] data) { 9I9)5`d|Jn
sort(data, IMPROVED_QUICK); +_<#8v
} 4dO>L"
private static String[] name={ u4Sa4o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9iUw7-)
}; Uvp?HZ\Z
`&o|=
private static Sort[] impl=new Sort[]{ GC~::m~
new InsertSort(), h W-[omr0
new BubbleSort(), P VPwYmte
new SelectionSort(), ;Zw28!#Rt
new ShellSort(), EpiagCS
new QuickSort(), xnArYm
new ImprovedQuickSort(), /cg!Ap5
new MergeSort(), /Wa+mp
new ImprovedMergeSort(), ],LOkAX
new HeapSort() 2:]Sy4K{
}; 0o#lB^e;l
5v]xk?Eb
public static String toString(int algorithm){ 6-oQs?
return name[algorithm-1]; C]k\GlhB
} [4gv_g
Gfvz%%>l
public static void sort(int[] data, int algorithm) { +1rJ;G
impl[algorithm-1].sort(data); 8w\&QX
} :c\NBKHv*
',.Xn`c
public static interface Sort { `bi5#xR
public void sort(int[] data); /w|YNDA]j
} =<<\Uo
?lTQjw{
public static void swap(int[] data, int i, int j) { U|>Js!$
int temp = data; :F_U^pyG
data = data[j]; te`4*t
data[j] = temp; It4F;Ah
} TnC'<zm9!
} x@/!H<y