[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; ^_<pc|1
} />n0&~k[h
int i1=l; ,*C^ixNE
int i2=mid+1; M{(Y|3W
for(int cur=l;cur<=r;cur++){ P-vA.7
if(i1==mid+1) 1L$u8P^<
data[cur]=temp[i2++]; }f({03$
else if(i2>r) ]=_BK!O
data[cur]=temp[i1++]; !C/`"JeYL
else if(temp[i1] data[cur]=temp[i1++]; f0hi70\(X
else -<<!eH
data[cur]=temp[i2++]; B3yn:=80
} "= %-
} %Z}dY~:
n_c0=YH
} Lnj5EY er
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改进后的归并排序: m+vwp\0
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package org.rut.util.algorithm.support; B1p9pr
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import org.rut.util.algorithm.SortUtil; Q!|71{5U
/ Sp+MB9
/** S"_vD<q
* @author treeroot r+Z+x{
* @since 2006-2-2 1}'Jbj"/
* @version 1.0 QeQbO
*/ $/d~bk@=l
public class ImprovedMergeSort implements SortUtil.Sort { w]%r]PwU+
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private static final int THRESHOLD = 10; g.9MPN
pF8'S{y
/* vJcvyz#%1
* (non-Javadoc) :Mt/6}
* 1yE~#KpH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PH=wPft
*/ zd;xbH//)b
public void sort(int[] data) { ~#j`+
int[] temp=new int[data.length]; Y#N'bvE|%
mergeSort(data,temp,0,data.length-1); |Z"hq
} lX7#3ti:
~MQN&
private void mergeSort(int[] data, int[] temp, int l, int r) { ?Ts Z_
int i, j, k; as\V, {<
int mid = (l + r) / 2; ~ 01]VA
if (l == r) 82w<q(
return; ___+5r21\
if ((mid - l) >= THRESHOLD) XBeHyQp
mergeSort(data, temp, l, mid); mV'd9(s?
else km3-Hp1
insertSort(data, l, mid - l + 1); xbmOch}j6
if ((r - mid) > THRESHOLD) 2OZdj
mergeSort(data, temp, mid + 1, r); ;j52a8uE'}
else p4el9O&-tV
insertSort(data, mid + 1, r - mid); 2<J82(4j
&!_Ko`b8K
for (i = l; i <= mid; i++) { ?dTz?C.w
temp = data; .}0Cg2W
} "5YsBih
for (j = 1; j <= r - mid; j++) { )<~b*^kl\
temp[r - j + 1] = data[j + mid]; +)F8YMg e
} w}2yi#E[
int a = temp[l]; dvxH:,
int b = temp[r]; 7"S|GEs:
for (i = l, j = r, k = l; k <= r; k++) { kPxrI=
if (a < b) { {fS/ZG"5<t
data[k] = temp[i++]; Dbtw>:=
a = temp; QVFa<>8/md
} else { JEAqSZak#
data[k] = temp[j--]; y[$e]N
b = temp[j]; RSkpf94`
} "%Rx;xw|
} P|6m%y
} _mO\Nw0
mqE&phF,
/** Y- w5S|!
* @param data 2Nj0 Hqjq
* @param l `bxgg'V
* @param i S5uV\Y/A
*/ zU}0AVlIL:
private void insertSort(int[] data, int start, int len) { I015)vFc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2[:`w),.
} h<QXr'4+
} $B(B
} MW&;{m?2(
} ~o8$/%Oeb/
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堆排序： JY_' d,O
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package org.rut.util.algorithm.support; M`5^v0,C
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import org.rut.util.algorithm.SortUtil; eH6#'M4+\
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/** 4sva%Up
* @author treeroot WIbU^WJ0
* @since 2006-2-2 7sFjO/a*
* @version 1.0 )X7ZX#ttH
*/ mM95BUB
public class HeapSort implements SortUtil.Sort{ 1 8&^k|
S]9xqiJW
/* (non-Javadoc) 7zNyH(.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yX)2 hj:s
*/ x2nNkd0h
public void sort(int[] data) { 1ITa6vjS
MaxHeap h=new MaxHeap(); AFY;;_Xks
h.init(data); au#IA
for(int i=0;i h.remove(); M9iu#6P
System.arraycopy(h.queue,1,data,0,data.length); Ml)WY#7
} q_I''L
"%sW/ph
private static class MaxHeap{ #q=?Zu^Da
cy? EX~s4
void init(int[] data){ !!P)r1=g
this.queue=new int[data.length+1]; 3L;)asF
for(int i=0;i queue[++size]=data; S3n$
fixUp(size); |M+ !O93
} K~Xt`
} q,m6$\g4
l~\'Z2op
private int size=0; rv\<Q-uQ8
<vPIC G)
private int[] queue; i|2Q}$3t2
YoahqXR`
public int get() { 5jbd!t@L
return queue[1]; |D<~a(0
} xvW+;3;
'\\J95*`
public void remove() { 0Uybh.dC
SortUtil.swap(queue,1,size--); ty"k
fixDown(1); {=&pnu\
} ^6obxwVG
file://fixdown 0t<TZa]V
private void fixDown(int k) { x2tx{Z
int j; bhFzu[B
while ((j = k << 1) <= size) { iHR?]]RF
if (j < size %26amp;%26amp; queue[j] j++; WSh+5](:
if (queue[k]>queue[j]) file://不用交换 qf'uXH
break; J%%nv5y
SortUtil.swap(queue,j,k); 6W$k^<S
k = j; F+}MW/ra@
} 2"2b\b}my
} =>ignoeI
private void fixUp(int k) { NBLOcRSh
while (k > 1) { (h2bxfV~+
int j = k >> 1; UW40Y3W0
if (queue[j]>queue[k]) "&>$/b$
break; fv}h;?C
SortUtil.swap(queue,j,k); Wb^YqqE
k = j; p6>3 p
} qex.}[
} "Z#&A
I]zCsT.
} )|*HkdF`
QQ pe.oF
} ;K`qSX;;c(
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SortUtil： yfi.<G)S
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package org.rut.util.algorithm; TTBl5X
e)GFJ3sW_
import org.rut.util.algorithm.support.BubbleSort; nIdvff
import org.rut.util.algorithm.support.HeapSort; #knpZ'
import org.rut.util.algorithm.support.ImprovedMergeSort; 6 Rg{^ERf
import org.rut.util.algorithm.support.ImprovedQuickSort; vJK0>":G
import org.rut.util.algorithm.support.InsertSort; J6=*F;x6E
import org.rut.util.algorithm.support.MergeSort; N^:)U"9*e
import org.rut.util.algorithm.support.QuickSort; bW[Y:}Hk~
import org.rut.util.algorithm.support.SelectionSort; !,|yrB&`S
import org.rut.util.algorithm.support.ShellSort; 8NA2C.gOZ
qm8[ ^jO&
/** \_0nH`
* @author treeroot t13wQt
* @since 2006-2-2 ax,%07hJ
* @version 1.0 ^ WidA-
*/ CH!Lf,G
public class SortUtil { YY'46
public final static int INSERT = 1; O57 eq.aT
public final static int BUBBLE = 2; He~)i)co
public final static int SELECTION = 3; 3/oVl 6
public final static int SHELL = 4; ^jqQG+`?
public final static int QUICK = 5; jDOB(fE
public final static int IMPROVED_QUICK = 6; XWH~o:0<2
public final static int MERGE = 7; m)g:@^$
public final static int IMPROVED_MERGE = 8; ^vfp;
public final static int HEAP = 9; ?/5WM%
3~%9;.I3!
public static void sort(int[] data) { 1s/t}J~zZ
sort(data, IMPROVED_QUICK); 6|~N5E~SX
} 4h|sbB"t
private static String[] name={ w%KU@$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wtIXZUx
}; AEp|#H' >
)jm}h7,
private static Sort[] impl=new Sort[]{ !S$LRm\'
new InsertSort(), <"X\~
new BubbleSort(), tg.[.vKs
new SelectionSort(), Fzt{^%\`
new ShellSort(), p0>W}+8fF
new QuickSort(), <$qe2FtUq
new ImprovedQuickSort(), A )tGB&
new MergeSort(), 1 cvoI
new ImprovedMergeSort(), J7c(qGJI2
new HeapSort() .T#h5[S2x
}; bM+}j+0
0X!A'
public static String toString(int algorithm){ |eU{cK~e^
return name[algorithm-1]; au1uFu-
} *@^9]$*$
L9W'TvTwo
public static void sort(int[] data, int algorithm) { 4|ML#aRz
impl[algorithm-1].sort(data); _H}8eU
} PuYAoKG
$~W=)f9
public static interface Sort { W+k SL{0
public void sort(int[] data); #R-l2OO^]
} A]c'`Nf
U["'>&B
public static void swap(int[] data, int i, int j) { (kCzz-_\
int temp = data; w&8N6gA14
data = data[j]; .hPk}B/KV
data[j] = temp; =ss(~[
} Bi:%}8STH
} r01Z 0>