[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; ' DZYN {}
} xpWx6
int i1=l; O]\6Pv@N
int i2=mid+1; mUmU_L u8
for(int cur=l;cur<=r;cur++){ 3++}4%w
if(i1==mid+1) 4;]<#u
data[cur]=temp[i2++]; =ZE]jmD4P
else if(i2>r) /!l$Y?
data[cur]=temp[i1++]; <QlpIgr
else if(temp[i1] data[cur]=temp[i1++]; `K,{Y_
else q`HuVilNH
data[cur]=temp[i2++]; EqN<""2
} 9w^lRbn
} h%9>js^~
cjf 8N:4N0
} wxa?.
MM}lW-q;
改进后的归并排序: Vq'\`$_
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package org.rut.util.algorithm.support; 77FI&*q
#H'j;=]:
import org.rut.util.algorithm.SortUtil; q&/<~RC*
emhI1 *}
/** Tz\PQ)!
* @author treeroot a'T8U1
* @since 2006-2-2 #Tz$ona
* @version 1.0 qXOWCYqs
*/ @%(Vi!Cv"R
public class ImprovedMergeSort implements SortUtil.Sort { "!ZQ`yl
+3a}~pW
private static final int THRESHOLD = 10; <G9HVMiP
:y/1Jf'2f
/* e\0vphS6
* (non-Javadoc) scf.>K2
* eb6Ux
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <G};`}$a
*/ ;Y6XX_
public void sort(int[] data) { dRdI('
int[] temp=new int[data.length]; 6:fHPlqW
mergeSort(data,temp,0,data.length-1); iyA=d{S;V
} \dm5Em/
oO0dN1/
private void mergeSort(int[] data, int[] temp, int l, int r) { '|I8byiK
int i, j, k; q7}rD$
int mid = (l + r) / 2; RP@U0o
if (l == r) YFJw<5&
return; .wU0F
if ((mid - l) >= THRESHOLD) SmpYH@
mergeSort(data, temp, l, mid); &$$o=Yg,
else _>8rTk`/h
insertSort(data, l, mid - l + 1); j8cIpbp8x
if ((r - mid) > THRESHOLD) WE{fu{x
mergeSort(data, temp, mid + 1, r); m4 k:uk7N
else Fb!Ew`;QT
insertSort(data, mid + 1, r - mid); 5NR@<FE
}508wwv
for (i = l; i <= mid; i++) { z4qc)- {L
temp = data; `!udU,|N
} oe'f?IY
for (j = 1; j <= r - mid; j++) { ){nOM$W
temp[r - j + 1] = data[j + mid]; !K8Kw W|X
} `WUyffS/!
int a = temp[l]; o2 ;
int b = temp[r]; r|_@S[hZg
for (i = l, j = r, k = l; k <= r; k++) { O .ESI
if (a < b) { "1l$]=C*
data[k] = temp[i++]; Ybkydc
a = temp; #n7F7X
} else { 2q NA\-0i>
data[k] = temp[j--]; =*5< w
b = temp[j]; ^ Fnag]qQ
} th1;Ym+Ze
} 57K\sT4[
} }Q?a6(4
VnYcqeCm
/** \ xJ_)r
* @param data 68UfuC
* @param l Tc.QzD\
* @param i *)(S}D\94
*/ k-N}tk/5
private void insertSort(int[] data, int start, int len) { i91 =h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '5m4kDs
} 'ln o#
} P;G]qV%
} 2<T/N
} [[#R ry
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堆排序： s&4&\Aq}x#
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package org.rut.util.algorithm.support; a&Z,~Vp
@__m>8wn
import org.rut.util.algorithm.SortUtil; B'e@RhU;
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/** ?Rk[P cX<
* @author treeroot *3KSOcQ
* @since 2006-2-2 ?Dl;DE1
* @version 1.0 aX2N Qq>s
*/ 95E#
public class HeapSort implements SortUtil.Sort{ z1^3~U$}
PfsUe,*
/* (non-Javadoc) AQ?;UDqU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8(ot<3(D
*/ kWacc&*|
public void sort(int[] data) { `TYC]9
MaxHeap h=new MaxHeap(); -<ome~|
h.init(data); ifNyVEHy
for(int i=0;i h.remove(); x_x_TEyyh
System.arraycopy(h.queue,1,data,0,data.length); 4H^ACw
} *b_Iby-ZD
ULhXyItL
private static class MaxHeap{ E4'z
C+t0Zen
void init(int[] data){ *8_Dn}u?Jx
this.queue=new int[data.length+1]; A0Q`Aqs
for(int i=0;i queue[++size]=data; }Q*J!OH
fixUp(size); Uq @].3nf
} !x:{"
} E+|K3EJ
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private int size=0; 1KY0hAx
C4qK52'2s
private int[] queue; T`MM<+^G
@lX%Fix9
public int get() { j{'_sI{{
return queue[1]; ;5.<M<PH
} EP"Z58&$R
yMu G? x+
public void remove() { |h%HUau
SortUtil.swap(queue,1,size--); >tPf.xI|l
fixDown(1); XjCx`bX^<
} zRd.!Rv
file://fixdown }K@m4`T
private void fixDown(int k) { pKpB
int j; YK[2KTlo
while ((j = k << 1) <= size) { #t;]s<
if (j < size %26amp;%26amp; queue[j] j++; =|``d-
if (queue[k]>queue[j]) file://不用交换 |5%T)
break; ke!
SortUtil.swap(queue,j,k); + kT ]qH
k = j; iqdU?&.;
} N UvVhy]{
} =4'V}p
private void fixUp(int k) { J}[[tl
while (k > 1) { f^*Yqa
int j = k >> 1; ]{#=WTp]
if (queue[j]>queue[k]) i}zz!dJTE
break; Xp9I3nd|
SortUtil.swap(queue,j,k); kS&>g
k = j; Hi=</ Wy;
} ZfX$q\7
} 37kVJQcA1
LEeA ,Y
} Y2XxfZj
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} J'sa{/ #
EpNN!s=Q
SortUtil： Ex zB{"
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package org.rut.util.algorithm; @XolFOL"f"
,dTmI{@O
import org.rut.util.algorithm.support.BubbleSort; H7.l)'
import org.rut.util.algorithm.support.HeapSort; [|1I.AZ{
import org.rut.util.algorithm.support.ImprovedMergeSort; Li}5aK
import org.rut.util.algorithm.support.ImprovedQuickSort; k9OGnCW\
import org.rut.util.algorithm.support.InsertSort; wEM=Tr/h
import org.rut.util.algorithm.support.MergeSort; f$\O:E=
import org.rut.util.algorithm.support.QuickSort; #"KC29!Yj
import org.rut.util.algorithm.support.SelectionSort; Sx QA*}N
import org.rut.util.algorithm.support.ShellSort; -JF^`hBD-
;veD?|
/** `j@1]%&z
* @author treeroot Ms,MXJtH
* @since 2006-2-2 64mEZ_kG,
* @version 1.0 5 | ,b
*/ x1#>"z7
public class SortUtil { X.;VZwT+
public final static int INSERT = 1; P'OvwA
public final static int BUBBLE = 2; =xIZJ8e
public final static int SELECTION = 3; jw=PeT|
public final static int SHELL = 4; p__wBUB
public final static int QUICK = 5; 1J"9Y81
public final static int IMPROVED_QUICK = 6; /Yp#`}Ii
public final static int MERGE = 7; y`buY+5l
public final static int IMPROVED_MERGE = 8; 8!Wh`n<
public final static int HEAP = 9; |EX=Rj*
NT*r7_e
public static void sort(int[] data) { #O}}pF
sort(data, IMPROVED_QUICK); H( i
} aqI"4v]~b
private static String[] name={ D?1fY!C:r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" WM ?a1j
}; Lcpe*C x-
? /z[Jx.
private static Sort[] impl=new Sort[]{ zVw5(Tc
new InsertSort(), rnj$u-8
new BubbleSort(), -C q;
new SelectionSort(), D1xGUz2r
new ShellSort(), YP_L~zZ
new QuickSort(), K'r;#I|"J
new ImprovedQuickSort(), q%dG>!
new MergeSort(), ~\CS%thX
new ImprovedMergeSort(), h7"U1'b
new HeapSort() {s0%XG1$
}; Y)X7*iTi'j
Uv *Aa7M
public static String toString(int algorithm){ mfQ#n!{ZH
return name[algorithm-1]; 6^]|
} oM~y8O
*tF~CG$r
public static void sort(int[] data, int algorithm) { l}z<q
impl[algorithm-1].sort(data); ]WDmx$"&e
} :uo1QavO@,
YK3>M"58
public static interface Sort { o?Hfxp0}
public void sort(int[] data); lWId 0eNS
} }R['Zoh4I
H>EM3cFU
public static void swap(int[] data, int i, int j) { K4!-%d$
int temp = data; }~I!'J#)
data = data[j]; h$l/wn
data[j] = temp; f)/Z7*Z
} C:J;'[,S
} .Ix3wR9