[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; o}WB(WsG
} H @_eFlT t
int i1=l; 4$0jz'
int i2=mid+1; A Oby*c
for(int cur=l;cur<=r;cur++){ A8\U CG
if(i1==mid+1) @`w'
data[cur]=temp[i2++]; B.]qrS|
else if(i2>r) -s9Y(>
data[cur]=temp[i1++]; 1;cv-W
else if(temp[i1] data[cur]=temp[i1++]; r{pI-$
else UiJ^~rn
data[cur]=temp[i2++]; *Gg1h@&
} di-O*ug
} Aivu%}_|
l84h%,
} a9yIV5_N
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改进后的归并排序: 2(c<U6#C'l
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package org.rut.util.algorithm.support; @?<N +qdH>
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import org.rut.util.algorithm.SortUtil; 4?9soc
(Wm/$P;
/** d%}crM-KTL
* @author treeroot r4;5b s6wm
* @since 2006-2-2 gGtep*k
* @version 1.0 YH/S2D
*/ !Z#_X@NFc
public class ImprovedMergeSort implements SortUtil.Sort { D__lqboz
anHBySI3
private static final int THRESHOLD = 10; ]I{qp~^#n
n.2E8m/
/* vDu0
* (non-Javadoc) tb-OKZq
* }4bB7,j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p{mxk)A
*/ '#cT4_D^lI
public void sort(int[] data) { uznoyj6g
int[] temp=new int[data.length]; K$MJ#Zx^
mergeSort(data,temp,0,data.length-1); ;whFaQi 4
} #JJp:S~`
/E`l:&89)
private void mergeSort(int[] data, int[] temp, int l, int r) { l%sp[uqcg
int i, j, k; Nw9-pQ
int mid = (l + r) / 2; ,omp F$%
if (l == r) AJ;u&&c4C\
return; rK(x4]I l"
if ((mid - l) >= THRESHOLD) 8w{#R{w
mergeSort(data, temp, l, mid); xm%[}Dt]
else XBfiaj
insertSort(data, l, mid - l + 1); ,W)IVc
if ((r - mid) > THRESHOLD) q|47;bK'
mergeSort(data, temp, mid + 1, r); /RA1d<~$q
else E1Ru)k{B
insertSort(data, mid + 1, r - mid); -V;0_Nx7p
)8 "EI-/.
for (i = l; i <= mid; i++) { 68&6J's;
temp = data; Pe+ 8~0o=R
} U/1[~429
for (j = 1; j <= r - mid; j++) { mV:RmA
temp[r - j + 1] = data[j + mid]; r85Xa'hh
} ,?0-=o
int a = temp[l]; F:*[
int b = temp[r]; L}e"nzTE6I
for (i = l, j = r, k = l; k <= r; k++) { <B]i80.
if (a < b) { Dyouk+08x
data[k] = temp[i++]; 1jUhG2y
a = temp; rZ8Y=) e
} else { (n":]8}
data[k] = temp[j--]; WuP([8
b = temp[j]; X/`#5<x
} :/yr(V{
} [6,]9|~
} J'G`=m"-'
.R$+#_
/** s0XRL1kWr
* @param data .T#y N\S1
* @param l #q~3c;ec
* @param i *!r\GGb
*/ :Fi%Cef|
private void insertSort(int[] data, int start, int len) { IS0HV$OI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h30QCk
} DJ mQZ+{2
} (PsSE:r}+
} jM3Y|}+
} !_XU^A>
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堆排序： #FQm/Q<0
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package org.rut.util.algorithm.support; hSx+{4PZ
0TuOY%+
import org.rut.util.algorithm.SortUtil; 68'-1}
lry&)G=5
/** JGSk4
* @author treeroot }l]3m=)
* @since 2006-2-2 pU:C=hq4
* @version 1.0 x;ICV%g/
*/ K+h9bI/Sf
public class HeapSort implements SortUtil.Sort{ (2O} B.6
[/+dHW|
/* (non-Javadoc) #U!(I#^3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Kbz7
*/ 8CnI%_Su
public void sort(int[] data) { -KIVnV=&m
MaxHeap h=new MaxHeap(); A<YZBR_
h.init(data); U2[3S\@
for(int i=0;i h.remove(); (jo(bbpj
System.arraycopy(h.queue,1,data,0,data.length); 48~m=mI
} l# !@{ <
NDIc?kj~
private static class MaxHeap{ p(x1D]#Z[
^O$[Y9~*
void init(int[] data){ ~P]HG;$?n
this.queue=new int[data.length+1]; r_g\_y7ua
for(int i=0;i queue[++size]=data; 0'q(XB`i=
fixUp(size); H%01&u
} SVg@xu+
} Wy^[4|6
7>#L
private int size=0; ~G{$P'[
WnJLX ^;
private int[] queue; I?>-
#)PGQ)(
public int get() { MOqA$b
return queue[1]; VH7iH|eW
} W3o}.|]
S,"ChR
public void remove() { OO !S w
SortUtil.swap(queue,1,size--); S\v&{
fixDown(1); St3(1mApl
} WkDn
file://fixdown j6R{
private void fixDown(int k) { 0IPhVG~#
int j; t7!>5e)C}
while ((j = k << 1) <= size) { t5jhpPVf
if (j < size %26amp;%26amp; queue[j] j++; ,3@15j
if (queue[k]>queue[j]) file://不用交换 :|m~<'g
break; vY0V{u?J
SortUtil.swap(queue,j,k); LG&Q>pt.
k = j; *v:,rh
} ?^yh5
} /_k hFw
private void fixUp(int k) { UwL"%0u
while (k > 1) { jzJ1+/9
int j = k >> 1; ]!tYrSM!
if (queue[j]>queue[k]) y9G57D
break; Cj4b]*Q,
SortUtil.swap(queue,j,k); YAC zznN
k = j; )(ZPSg$/F
} owpJ7S1~
} ~gi( 1<#
@Pb 1QLiz
} d"d)<f
%\{?(baOA
} Eps\iykB
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SortUtil： bJ,=yB+0
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package org.rut.util.algorithm; MY<!\4/
AXU!-er$
import org.rut.util.algorithm.support.BubbleSort; Acq>M^E3
import org.rut.util.algorithm.support.HeapSort; ^0ZKHR(}e
import org.rut.util.algorithm.support.ImprovedMergeSort; j=jrzG+`
import org.rut.util.algorithm.support.ImprovedQuickSort; E'BH7JV
import org.rut.util.algorithm.support.InsertSort; _@~kYz
import org.rut.util.algorithm.support.MergeSort; FUqhSW
import org.rut.util.algorithm.support.QuickSort; <C.$Db&9
import org.rut.util.algorithm.support.SelectionSort; RkH oT^
import org.rut.util.algorithm.support.ShellSort; -< dMD_
W'2-3J
/** R:IS4AaS
* @author treeroot |v%RjN
* @since 2006-2-2 l3pW{p
* @version 1.0 9y|&T
*/ Fx88R!
public class SortUtil { In9|n^=H@
public final static int INSERT = 1; jVFRqT%
public final static int BUBBLE = 2; HH~ du
public final static int SELECTION = 3; @#--dOWYR
public final static int SHELL = 4; KlqJEtO_
public final static int QUICK = 5; =3v 1]7X
public final static int IMPROVED_QUICK = 6; UVBw;V
public final static int MERGE = 7; W$MEbf%1
public final static int IMPROVED_MERGE = 8; iQ}sp64
public final static int HEAP = 9; *6x^w%=A
:qSi>KCGh
public static void sort(int[] data) { )|^<woli,
sort(data, IMPROVED_QUICK); >yT@?!/Q>'
} zm3MOH^a
private static String[] name={ ~lalc ^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <,cIc]eX
}; \,bFm,kC?
Y %D*O
private static Sort[] impl=new Sort[]{ WWs[]zr
new InsertSort(), gS<{ekN
new BubbleSort(), pS@VLXZP
new SelectionSort(), gK#fuQ$hH
new ShellSort(), x<y[na
new QuickSort(), fJ"~XTN}T
new ImprovedQuickSort(), L+ETMk0
new MergeSort(), gZ>orZL'
new ImprovedMergeSort(), wZ3vF)2s
new HeapSort() F']%q 0
}; U;Y}2
aj'8;E+
public static String toString(int algorithm){ }L7F g%,
return name[algorithm-1]; J'^$|/Q
} 1>@|
F-7b`cF9[r
public static void sort(int[] data, int algorithm) { KsU&<eQ
impl[algorithm-1].sort(data); <QW1fE
} :8|3V~%m
*Qwhi&k
public static interface Sort { KRR^?
public void sort(int[] data); <<zz*;RJJ
} 6M vRR
7 }MJK)
public static void swap(int[] data, int i, int j) { -0IFPL8
int temp = data; !#4HGjPI
data = data[j]; kR~4O$riG
data[j] = temp; mF:s-+
} ABe^]HlH
} !2M[