[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; #0#6eT{-
} lfwBUb
int i1=l; eR3MU]zF
int i2=mid+1; `@:k*d
for(int cur=l;cur<=r;cur++){ Q2@yUDd!
if(i1==mid+1) [E}pU8.t6
data[cur]=temp[i2++]; I;P!
else if(i2>r) (t,|FkVLV
data[cur]=temp[i1++]; dGR #l)
else if(temp[i1] data[cur]=temp[i1++]; Aj>
else @Hp=xC9V
data[cur]=temp[i2++]; j2n 4; m
} B|;?#okx
} 4%TmW/yd
;b, bHL
} 'sI @es
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改进后的归并排序: V]A*' ke/
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package org.rut.util.algorithm.support; o^&nkR
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import org.rut.util.algorithm.SortUtil; HpTX6}^
nM&UdKf3
/** 6I$:mHEhd
* @author treeroot GF awmNZ
* @since 2006-2-2 ALnE[}N6,
* @version 1.0 ;CdxKr-d
*/ \jThbCb
public class ImprovedMergeSort implements SortUtil.Sort { BvV!?DY4
RiM!LX
private static final int THRESHOLD = 10; 3k?|-js
@)p?!3{"
/* 8n)3'ok
* (non-Javadoc) cvl1X"
* /2e,,)4g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LuW^Ga"E
*/ ?>o|H-R~5Z
public void sort(int[] data) { rA#Ji~
int[] temp=new int[data.length]; K_E- Hgg_
mergeSort(data,temp,0,data.length-1); Z:s:NvFX
} #R$[?fW
x$\w^h\F
private void mergeSort(int[] data, int[] temp, int l, int r) { _q dLA
int i, j, k; :*{\oqFn~$
int mid = (l + r) / 2; &C7HG^;W9
if (l == r) y153ax
return; A4^+p0@
if ((mid - l) >= THRESHOLD) v3NaX.
mergeSort(data, temp, l, mid); j{PX ~/
else o?3R HP47
insertSort(data, l, mid - l + 1); g[$B90
if ((r - mid) > THRESHOLD) `#]\Wnp~y
mergeSort(data, temp, mid + 1, r); t&xx-4
else @K/Ia!Lw
insertSort(data, mid + 1, r - mid); 40<&0nn
3%} Ma,
for (i = l; i <= mid; i++) { \x!>5Z Y
temp = data; ,jn?s^X6Dj
} 1mX*0>
for (j = 1; j <= r - mid; j++) { DHAWUS6
temp[r - j + 1] = data[j + mid]; W)#`4a^xj7
} qkIU>b,B
int a = temp[l]; u!i5Q
int b = temp[r]; nqBuC
for (i = l, j = r, k = l; k <= r; k++) { (Ka#6
if (a < b) { e-VLU;
data[k] = temp[i++]; +6=!ve}
a = temp; ^6+x0[13
} else { .bE,Q9:
data[k] = temp[j--]; .*j+?
b = temp[j]; FMVmH!E
} H[D/Sz5`
} a%dx\&K
} `9ox?|iJ
L,6Y=?
/** |6>_L6t
* @param data o$O,#^
* @param l `y`xk<q
* @param i `y}d)"!
*/ jO55<s94
private void insertSort(int[] data, int start, int len) { W(aRO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); RY{tX`
} MxRU6+a
} q3F5\6aN
} MbfzGYA2~
} H#inr^Xa
spJ(1F{|V
堆排序： vgj^-
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package org.rut.util.algorithm.support; j;)g+9`
^{:jY, ?]
import org.rut.util.algorithm.SortUtil; F-^HN%
%7msAvbk
/** 0>iFXw:fn
* @author treeroot &._!)al
* @since 2006-2-2 }&DB5M
* @version 1.0 %v[Kk-d
*/ {ah=i8$
public class HeapSort implements SortUtil.Sort{ n#Roz5/U
Nb~dw;t
/* (non-Javadoc) #[y<h3f]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5vft}f
*/ jJZsBOW[8
public void sort(int[] data) { m>ycN
MaxHeap h=new MaxHeap(); N@6OQ:,[F
h.init(data); oDP((I2-
for(int i=0;i h.remove(); m> (h_j
System.arraycopy(h.queue,1,data,0,data.length); ^,lZ58 2
} _-]!;0EIV
z,FTsR$x
private static class MaxHeap{ q9Sz7_K
hF"g91P
void init(int[] data){ y?n2`l7f
this.queue=new int[data.length+1]; lt6;*z[
for(int i=0;i queue[++size]=data; [fi'=Cb
fixUp(size); QaWHz
} -I-Uh{)j
} ,6;xr'[o*
1/ pA/UVO
private int size=0; pXh~#o6V
99"[b
private int[] queue; 3;MjO*-
P%sO(_PuT
public int get() { rLh9`0|D
return queue[1]; eQFb$C]R}y
} /;&+< }
ggI=I<7M
public void remove() { ^2^|AXNES
SortUtil.swap(queue,1,size--); ,p!B"# ot
fixDown(1); a4(?]ND~6
} x8?x/xE
file://fixdown "6N~2q,SW
private void fixDown(int k) { eh:}X}c=J]
int j; r1oku0o
while ((j = k << 1) <= size) { ?96-" l
if (j < size %26amp;%26amp; queue[j] j++; dA1 C)gLi
if (queue[k]>queue[j]) file://不用交换 U2V^T'Y[
break; pAil]f6
SortUtil.swap(queue,j,k); P$18Xno{
k = j; |Vwc/9`t]>
} ZP6x
} 5U{4TeUH
private void fixUp(int k) { wfDp,T3w7
while (k > 1) { 'sRg4?PT
int j = k >> 1; "65||[=8
if (queue[j]>queue[k]) mT6q}``vtG
break; :YqQlr\
SortUtil.swap(queue,j,k); >AQ)x
k = j; Qq T/1^imS
} x^)g'16`
} [O7w =
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} f4'El2>-86
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} K[uY+!'1
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SortUtil： "mPSA Z
V)0[`zJ
package org.rut.util.algorithm; 9DOkQnnc
Cs:+93w
import org.rut.util.algorithm.support.BubbleSort; D[89*@v
import org.rut.util.algorithm.support.HeapSort; E3S%s
import org.rut.util.algorithm.support.ImprovedMergeSort; _BG8/"h32
import org.rut.util.algorithm.support.ImprovedQuickSort; [x!i* rW3
import org.rut.util.algorithm.support.InsertSort; Z}8k[*.
import org.rut.util.algorithm.support.MergeSort; .[T'yc:=
import org.rut.util.algorithm.support.QuickSort; ?}'N_n ys
import org.rut.util.algorithm.support.SelectionSort; q.=^iz&m
import org.rut.util.algorithm.support.ShellSort; I %|@3=Yc
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/** (9mbF%b
* @author treeroot fav5e'[$
* @since 2006-2-2 J| SwQE~
* @version 1.0 3ty4D2y
*/ {TyCj?3B
public class SortUtil { )v%l0_z{
public final static int INSERT = 1; w4\BD&7V
public final static int BUBBLE = 2; gtD
public final static int SELECTION = 3; N'I(P9@
public final static int SHELL = 4; X*pZNz&E
public final static int QUICK = 5; zlH28V
public final static int IMPROVED_QUICK = 6; 3A-*vaySV
public final static int MERGE = 7; Q |
public final static int IMPROVED_MERGE = 8; [6AHaOhR'
public final static int HEAP = 9; _ XE;-weE
-=>sTMWpr
public static void sort(int[] data) { C<_Urnmn
sort(data, IMPROVED_QUICK); -i#J[>=w{C
} ?4^};wDb2
private static String[] name={ Le*`r2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xEjx]w/&
}; ~gP7s_qr{
:^n*V6.4
private static Sort[] impl=new Sort[]{ 6`acg'sk>
new InsertSort(), K[kds`
new BubbleSort(), jz*0`9&_
new SelectionSort(), {$;2HbM(
new ShellSort(), p"2m90IO
new QuickSort(), _=pWG^a
new ImprovedQuickSort(), >w9sE8i
new MergeSort(), 4Rx~s7l
new ImprovedMergeSort(), 6 jmrD
new HeapSort() $]C=qM28-
}; {@3z\wMK$
I?B,sl_w
public static String toString(int algorithm){ )i;un.
return name[algorithm-1]; @K\o4\
} dPsLZ"I
Xx_tpC?
public static void sort(int[] data, int algorithm) { n+2%tW
impl[algorithm-1].sort(data); yNBv-oe5
} 3A_G=WaED
S<"oUdkz
public static interface Sort { HmMO*k<6@
public void sort(int[] data); *Ddi(`
} :5J_5,?;`
h h"h j
public static void swap(int[] data, int i, int j) { /'ZKST4
int temp = data; 8] `Ru5nd
data = data[j]; zEj#arSE4
data[j] = temp; lbTV$A
} c;9.KCpwx
} -jB3L: