[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; _BJ:GDz>
} A>upT'
int i1=l; XE<5(
int i2=mid+1; <ml?DXT
for(int cur=l;cur<=r;cur++){ N~CQh=<
if(i1==mid+1) 3))R91I
data[cur]=temp[i2++]; Ua 6O~,\
else if(i2>r) H,w8+vZ4\
data[cur]=temp[i1++]; wZ\93W-}
else if(temp[i1] data[cur]=temp[i1++]; 9=]HOUn
else [qRww]g;P|
data[cur]=temp[i2++]; H7&y79mB
} .*njgAq7
} \-6y#R-B
!h7:rv/
} OhCdBO
m)pHCS
改进后的归并排序: !]g[u3O
U+B"$yBR
package org.rut.util.algorithm.support; 1) 2-UT
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import org.rut.util.algorithm.SortUtil; f['lY1#V1
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/** hOZTD0
* @author treeroot \M@IKE
* @since 2006-2-2 2SD Z
* @version 1.0 &R4?]I
*/ Aqf91 [c
public class ImprovedMergeSort implements SortUtil.Sort { 8WP"~Js!
YQd($
private static final int THRESHOLD = 10; fcF|m5
NdLe|L?c
/* R"O%##Ws
* (non-Javadoc) ]f&]E ~i
* y< dBF[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x zF
*/ 2INpo
public void sort(int[] data) { ,pTZ/#vP#
int[] temp=new int[data.length]; 9ETdO,L)f
mergeSort(data,temp,0,data.length-1); Ji!i}UjD7!
} i_AD3Jrs
5ILKYUg,
private void mergeSort(int[] data, int[] temp, int l, int r) { r5hkxk'
int i, j, k; DeF`#a0E
int mid = (l + r) / 2; FO_}9<s
if (l == r) z5iCQ4C<
return; 7ixG{yu
if ((mid - l) >= THRESHOLD) kDmuj>D
mergeSort(data, temp, l, mid); !\%JOf}
else H'YKj'
insertSort(data, l, mid - l + 1); dZ(Z]`L,B
if ((r - mid) > THRESHOLD) F1$XUos9
mergeSort(data, temp, mid + 1, r); +<xQF
else .@nfqv7{
insertSort(data, mid + 1, r - mid); H9TeMY
yY UAH-
for (i = l; i <= mid; i++) { _^b\#Jz4U3
temp = data; ]O:8o<0
} ]rY9t@
for (j = 1; j <= r - mid; j++) { |-\anby<
temp[r - j + 1] = data[j + mid]; 2RNee@!JJP
} L9Zz-Dr s
int a = temp[l]; [O_5`X9|
int b = temp[r]; ATc!c +
for (i = l, j = r, k = l; k <= r; k++) { y,&[OrCm^\
if (a < b) { [&&#~gz
data[k] = temp[i++]; oP56f"BE(
a = temp; b1IAp>*2l
} else { [olSgq!3
data[k] = temp[j--]; MH'%E^n `
b = temp[j]; _7:Bxx4B
} ojBdUG\
} _$IWr)8f
} DUu:et&c1
?F[_5ls|]
/** u?SwGXi~8
* @param data 8(K:2
* @param l {e2ZW]
* @param i ET9tn1
*/ BRu}"29
private void insertSort(int[] data, int start, int len) { .bp#YU,m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v ))`U,Gm
} Fng
} qlPIxd
} gfAWN
} #| gh
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堆排序： DcaKGjp
4pXY7+e2'
package org.rut.util.algorithm.support; V!]|u ^4I
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import org.rut.util.algorithm.SortUtil; AtHkz|sl
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/** 4|\M`T
* @author treeroot u|$HA>F[
* @since 2006-2-2 Lhg
* @version 1.0 X{!,j}
*/ Q-R?y+| x
public class HeapSort implements SortUtil.Sort{ rBL2A
CHqi5Z/+
/* (non-Javadoc) ?rt[ aK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z)*{bz]
*/ PEjd
public void sort(int[] data) { l> H'PP~
MaxHeap h=new MaxHeap(); k-^^Ao*@
h.init(data); SbL7e#!!
for(int i=0;i h.remove(); TK'y-5W
System.arraycopy(h.queue,1,data,0,data.length); V:5aq.o!
} :f7!?^;y>
{*hGe_^
private static class MaxHeap{ d<OdQvW.
GK11fZpO:i
void init(int[] data){ {GT5
this.queue=new int[data.length+1]; jYAm}_?No
for(int i=0;i queue[++size]=data; ZWuNl!l>
fixUp(size); INk|NEX
} h'G
} ;IPk+,hpmi
3''Kg<k,I
private int size=0; d?YSVmG
751Qi
private int[] queue; $1s>efP-
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public int get() { ^zqQ8{oV
return queue[1]; NhYUSk ~u
} QjpJIw
DTi^* Wj
public void remove() { G^L9[c= ,
SortUtil.swap(queue,1,size--); 8?<J,zu@AV
fixDown(1); 6yYd~|T.Fl
} 9$[MM*r
file://fixdown o(v7&m;
private void fixDown(int k) { 6=Q6J
int j; Jz&dC
while ((j = k << 1) <= size) { 4C:dkaDq]
if (j < size %26amp;%26amp; queue[j] j++; %t9Kc9u3p
if (queue[k]>queue[j]) file://不用交换 Mt{cX,DS
break; Ha ZV7
SortUtil.swap(queue,j,k); (A}c22qe
k = j; ,_7m<(/f
} &DtI+)[|
} D"fjk1
private void fixUp(int k) { -g9CW[
while (k > 1) { 6+s&%io4
int j = k >> 1; U/v)6:j)4R
if (queue[j]>queue[k]) 8QKu
break; NX;{L#lQ
SortUtil.swap(queue,j,k); u0[O /G
k = j; wax^iL!
} @LU[po1I
} Zcc7 7dRA
4RQ38%> >j
} :=q9ay
#t# S(A9)
} 0T$`;~
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SortUtil： d|UH AX
b-c6.aKf|
package org.rut.util.algorithm; <A\g*ld
f e^s`dsG
import org.rut.util.algorithm.support.BubbleSort; /<O9^hA|
import org.rut.util.algorithm.support.HeapSort; [P)](8nR[
import org.rut.util.algorithm.support.ImprovedMergeSort; R iLqMSq
import org.rut.util.algorithm.support.ImprovedQuickSort; x<d ew
import org.rut.util.algorithm.support.InsertSort; Ia^/^>
import org.rut.util.algorithm.support.MergeSort; % 1<@p%y/
import org.rut.util.algorithm.support.QuickSort; McdK!V
import org.rut.util.algorithm.support.SelectionSort; rg%m
import org.rut.util.algorithm.support.ShellSort; <X97W\
4h}\Kl
/** 'P&r^V\~(/
* @author treeroot q7rX4-G$
* @since 2006-2-2 geqx":gpx9
* @version 1.0 #fyY37-
*/ j_zy"8Y{
public class SortUtil { A>:31C
public final static int INSERT = 1; bX%4[BKP
public final static int BUBBLE = 2; N=8CVI
public final static int SELECTION = 3; TQ {8 ee{
public final static int SHELL = 4; RC/&dB
public final static int QUICK = 5; d;r,?/C
public final static int IMPROVED_QUICK = 6; *Hh*!ePp
public final static int MERGE = 7; 1_n5:
public final static int IMPROVED_MERGE = 8; MAc/ T.[
public final static int HEAP = 9; q| *nd!y'
U!nNT==
public static void sort(int[] data) { UyNP:q:
sort(data, IMPROVED_QUICK); qNkX:|j
} {N-*eV9#
private static String[] name={ TjctK [db@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <(~geN
}; H[r64~Sth
Z>'hNj)ju
private static Sort[] impl=new Sort[]{ <S@2%%W
new InsertSort(), kw1Lm1C
new BubbleSort(), Lg6>\Z4
new SelectionSort(), 7H[.o~\
new ShellSort(), ]RW*3X
new QuickSort(), <|a9r: [
new ImprovedQuickSort(), I]d?F:cdX
new MergeSort(), /-3)^R2H
new ImprovedMergeSort(), Nn5sD3z#
new HeapSort() Oo%%f+
}; Sa6YqOel@
@y# u!}
public static String toString(int algorithm){ Fi+,omB&
return name[algorithm-1]; k0DX|O8mXV
} fhQ N;7
vRO`hGH
public static void sort(int[] data, int algorithm) { mgEZiAV?
impl[algorithm-1].sort(data); Cz4l
} T!5g:;~y >
072`i46
public static interface Sort { (Z>vbi%
public void sort(int[] data); PF;`mdi-,
} !=+hU/e
4f,%@s)zn
public static void swap(int[] data, int i, int j) { ,<CzS,(
int temp = data; }/.b@`Dh;
data = data[j]; SjU0Xb)[
data[j] = temp; FBI^}^#_
} \OF"hPq
} qIgb;=V