[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; sG\=_-"v(
} X=DJOepH'
int i1=l; .M_;mhRI
int i2=mid+1; o77HRX
for(int cur=l;cur<=r;cur++){ ~:JKXa?
if(i1==mid+1) "e_ED*
data[cur]=temp[i2++]; \TKv3N
else if(i2>r) p1 o?^A&
data[cur]=temp[i1++]; {!=IGFe
else if(temp[i1] data[cur]=temp[i1++]; V-jo2+Y5=
else D$j`+`
data[cur]=temp[i2++]; #Q;#A |EZ
} E P<U:F
} 2)U3/TNe
6z/8nf +u
} (+4=A k
/1O6;'8He
改进后的归并排序: K<V(h#(.@
6H3_qx
package org.rut.util.algorithm.support; q6osRK*20
|R+=Yk&u
import org.rut.util.algorithm.SortUtil; 6k^vF~
&jj\-;=~Ho
/** M>0~Ek%3
* @author treeroot RRV&!<l@$
* @since 2006-2-2 hzPpw.
* @version 1.0 'dBzv>ngD
*/ | WDX@Q
public class ImprovedMergeSort implements SortUtil.Sort { &qo'ge8p
$bMeL7CN
private static final int THRESHOLD = 10; /Fk0j_b
~>{<r{H"S
/* \Ud2]^D=
* (non-Javadoc) +[z(N
* {Q4=GrS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dAga(<K
*/ ==IL63
public void sort(int[] data) { "i#!
int[] temp=new int[data.length]; 6.ap^9AD
mergeSort(data,temp,0,data.length-1); r"rEVx#1=
} L!{^^7
Ef7Kx49I
private void mergeSort(int[] data, int[] temp, int l, int r) { W[YcYa_tQ
int i, j, k; az`5{hK
int mid = (l + r) / 2; c5U1N&k5&
if (l == r) }P^n /
return; 4u:{PN
if ((mid - l) >= THRESHOLD) )L_jR%2j
mergeSort(data, temp, l, mid); f0:)
else ~-.q<8
insertSort(data, l, mid - l + 1); Gew0Y#/
if ((r - mid) > THRESHOLD) Xf#uK\f
mergeSort(data, temp, mid + 1, r); .p0;y3so4
else yQ&;#`!'
insertSort(data, mid + 1, r - mid); 0k3^+#J
>O~xu^N?
for (i = l; i <= mid; i++) { -[+FVvS
temp = data; aIkxN&
} p%j@2U
for (j = 1; j <= r - mid; j++) { LV9\
temp[r - j + 1] = data[j + mid]; tMupX-V
} =niU6Q}
int a = temp[l]; f *)t<1f
int b = temp[r]; qf ]ax!bK
for (i = l, j = r, k = l; k <= r; k++) { {'{ssCL
if (a < b) { ysvn*9h+&
data[k] = temp[i++]; >2N`l
a = temp; 6~D:O?2
} else { C10A$=!
data[k] = temp[j--]; \7W {/v4^
b = temp[j]; y<B "
} R[oKhU
} ' Bdvqq
} '\ 6.GP
/GCSC8T
/** Qa"R?dfr
* @param data pQW^lqwZ:6
* @param l hu6)GOZbv
* @param i |[xi"E\
*/ MJ>(HJY6?%
private void insertSort(int[] data, int start, int len) { X~W5Z(w(O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6I 2`m(5
} k%uRG_
} g,x$z~zU{
} w6Ue5Ix,!
} VRMlr.T+
WqwD"WX+w
堆排序： 5MiWM2"X\
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package org.rut.util.algorithm.support; Jb_/c``
!07$aQYcd
import org.rut.util.algorithm.SortUtil; e3',? 5j
"BEU%,w
/** 4yjAi@ /2
* @author treeroot _3ZZ-=J:=*
* @since 2006-2-2 'L=g(
* @version 1.0 E-n!3RQ(w
*/ l1!i3m'x
public class HeapSort implements SortUtil.Sort{ 7dxY07yu
b/WVWDyob/
/* (non-Javadoc) .bew,92
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &XN*T.Y`
*/ [NC^v.[1[
public void sort(int[] data) { \5X34'7
MaxHeap h=new MaxHeap(); <w08p*?
h.init(data); At.WBa3j%{
for(int i=0;i h.remove(); CYG'WFvZZ
System.arraycopy(h.queue,1,data,0,data.length); I%pQ2T$;
} ?c(f6p?%
&a1agi7M
private static class MaxHeap{ A@&+!sO
+Hv%m8'0|
void init(int[] data){ IzkZ^;(N
this.queue=new int[data.length+1]; OB5(4TY
for(int i=0;i queue[++size]=data; Jtc?p{
fixUp(size); h]G}E9\l
} vFy/
} R"K{@8b
;`@DQvVZ:
private int size=0; W@/D2K(
wG19NX(
private int[] queue; 4W$53LP8
@$Z5Ag!
public int get() { yBq4~b~[
return queue[1]; p5>TL!4M
} 0d.lF:
Cl i k
public void remove() { '[:].?M
SortUtil.swap(queue,1,size--); {.eC"
fixDown(1); )Z"7^i
} k' pu%nWN
file://fixdown h&.9Q{D
private void fixDown(int k) { vk.Y2 :
int j; #P18vK5
while ((j = k << 1) <= size) { =yfr{5}R
if (j < size %26amp;%26amp; queue[j] j++; 7zpwP
if (queue[k]>queue[j]) file://不用交换 &#`d8}3D
break; EGU?54
SortUtil.swap(queue,j,k); V?5QpBKI
k = j; gXs@FhR0
} u=k\]W-
} a]$KI$)e
private void fixUp(int k) { d.2
while (k > 1) { o y}(
int j = k >> 1; 7{/qQGL
if (queue[j]>queue[k]) Z A7u66
break; r'w5i1C+
SortUtil.swap(queue,j,k); *Cj]j-
k = j; ml\7JW6Rx
} U#@:"v|
} Qy$8!(
>aN@)=h}
} eGtIVY/D
{ZN{$Ad3/
} 6WI_JbT~
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SortUtil： KiH#*u S
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package org.rut.util.algorithm; R0-ARq#0<
fJC)>doM
import org.rut.util.algorithm.support.BubbleSort; Mp"] =
import org.rut.util.algorithm.support.HeapSort; _/P"ulNb
import org.rut.util.algorithm.support.ImprovedMergeSort; ^J\)cw
import org.rut.util.algorithm.support.ImprovedQuickSort; xLq+njH E
import org.rut.util.algorithm.support.InsertSort; {Yv |C)O
import org.rut.util.algorithm.support.MergeSort; cidS/OH
import org.rut.util.algorithm.support.QuickSort; -&@[]/
import org.rut.util.algorithm.support.SelectionSort; 29x "E$e
import org.rut.util.algorithm.support.ShellSort; [uZU p*.V
/>.&
/** 7u o4F=%
* @author treeroot mpK|I|-
* @since 2006-2-2 t[)z/[m
* @version 1.0 x8tRa0-q
*/ )<IbQH|_
public class SortUtil { ]N2'L!4|;
public final static int INSERT = 1; `[57U,v
public final static int BUBBLE = 2; ;,@3bu>r
public final static int SELECTION = 3; Ba!`x<wa
public final static int SHELL = 4; 2ggW4`"c
public final static int QUICK = 5; /.7x[Yc
public final static int IMPROVED_QUICK = 6; pl|<g9
public final static int MERGE = 7; G@ed2T
public final static int IMPROVED_MERGE = 8; ;bkS0Vmg
public final static int HEAP = 9; E(8O3*=
=]U[
public static void sort(int[] data) { V4/eGh_T
sort(data, IMPROVED_QUICK); ,Sghi&Ky
} g)u2
private static String[] name={ Tb:n6a@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @b-?KH
}; 'xr\\Cd9s
:mL\KQ
private static Sort[] impl=new Sort[]{ ft:/-$&H
new InsertSort(), WNlWigwYl
new BubbleSort(), LPewoAXO
new SelectionSort(), hFylQfd
new ShellSort(), 3l5q?"$
new QuickSort(), 2Xe2%{
new ImprovedQuickSort(), d=N5cCqq
new MergeSort(), u&2uQ-T0
new ImprovedMergeSort(), [C P V5\2
new HeapSort() =xai 7iM
}; khc5h^0
x\I9J4Q
public static String toString(int algorithm){ h, +2Mc<
return name[algorithm-1]; mY dU`j
} G4=%<+
HPtaW:J
public static void sort(int[] data, int algorithm) { h#;fBQ]
impl[algorithm-1].sort(data); \AkeC6[D
} E2!;W8M
}^)M)8zS
public static interface Sort { !\+SE"ml
public void sort(int[] data); gHYYxhW$
} B6OggJ9Iq
;y4 "wBX
public static void swap(int[] data, int i, int j) { [4PG_k[uTJ
int temp = data; sN^R Z0!>
data = data[j]; w}oH]jVKL6
data[j] = temp; l&;#`\s!V
} z}u
} c>=[|F{{e