[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; E!;SL|lj.
} md+nj{Ib
int i1=l; 2L!u1
int i2=mid+1; /9 3M*b
for(int cur=l;cur<=r;cur++){ n*o-Lo+Fe.
if(i1==mid+1) L]yS[UN$
data[cur]=temp[i2++]; 9q)Kfz
else if(i2>r) GeI-\F7b
data[cur]=temp[i1++]; ]{!U@b
else if(temp[i1] data[cur]=temp[i1++]; {M3qLf~z#C
else y~(h>gi,x
data[cur]=temp[i2++]; e4-@f%5
} U1Q:= yD
} GXcJ< v
\1d(9jR
} oL-]3TY~
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改进后的归并排序: % BVs47g
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package org.rut.util.algorithm.support; 4Xgg%@C
0Vj4+2?L5;
import org.rut.util.algorithm.SortUtil; 90Pl$#cb2
!1rlN8w(qr
/** f0A{W/0n
* @author treeroot R$v[!A+:'
* @since 2006-2-2 Q}`0W[a ~
* @version 1.0 dW_KU}
*/ dW)B1iUo!
public class ImprovedMergeSort implements SortUtil.Sort { <qtr
4hO!\5-w:
private static final int THRESHOLD = 10; z-BXd
6wPaJbRtaM
/* m];]7uB5=
* (non-Javadoc) kh!FR u h
* {mm)ay|M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Az9?Ra;U
*/ ?e`^P
public void sort(int[] data) { VX].3=T8
int[] temp=new int[data.length]; 8H;t_B
mergeSort(data,temp,0,data.length-1); ? 8)'oMD
} v;BV@E0}x
B+Rm>^CBm
private void mergeSort(int[] data, int[] temp, int l, int r) { t;\kR4P
int i, j, k; ) dn(G@5
int mid = (l + r) / 2; H6kR)~zhf
if (l == r) <x@}01~
return; E08klC0
if ((mid - l) >= THRESHOLD) pyH:#5
mergeSort(data, temp, l, mid); wZG\>9~
else X]'{(?Ch
insertSort(data, l, mid - l + 1); IW>T}@ |
if ((r - mid) > THRESHOLD) "&%I)e^
mergeSort(data, temp, mid + 1, r); 83E7k]7]
else cU RkP`
insertSort(data, mid + 1, r - mid); :X0k]p
]@dZ{H|
for (i = l; i <= mid; i++) { 0f~C#/[t7
temp = data; %9w::hav
} F{Z~ R
for (j = 1; j <= r - mid; j++) { :imW\@u
temp[r - j + 1] = data[j + mid]; x%}^hiO<q
} 48c1gUwoP
int a = temp[l]; 4F)-"ck
int b = temp[r]; `lQ3C{}
for (i = l, j = r, k = l; k <= r; k++) { >,TUZ
if (a < b) { t,,k
data[k] = temp[i++]; 3XL#0\im?s
a = temp; Z LB4m`
} else { 4P'*umJi
data[k] = temp[j--]; O9vQp
b = temp[j]; ZU85P0
} ?!;7:VIE
} S)lkz'tdk
} ?a8^1:
9zZr^{lUl
/** !HrKXy0{
* @param data JF # # [O
* @param l Yb+yw_5
* @param i |L-]fjBbF
*/ ?h.wK
private void insertSort(int[] data, int start, int len) { o4j[p3$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g>Y|9Y
} *#E FsUw
} /~}}"zx&
} L_vISy%\b
} Z8zmHc"IH
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堆排序： &Nj3h(Ll
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package org.rut.util.algorithm.support; }3o|EXx=
pi /g H
import org.rut.util.algorithm.SortUtil; 0TCBQ~"
b@rVo;
/** vtw6FX_B
* @author treeroot mFg<dTx0c8
* @since 2006-2-2 87Oad@FOr
* @version 1.0 21 O'M
*/ BbW^Wxd3
public class HeapSort implements SortUtil.Sort{ 4xk|F'6K
Ey_" ~OB
/* (non-Javadoc) iTFdN}U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %70~M_
*/ eCN })An
public void sort(int[] data) { Y]NSN-t
MaxHeap h=new MaxHeap(); =4[v3Qx
h.init(data); 4#ug]X4Y')
for(int i=0;i h.remove(); |zR8rqBX;
System.arraycopy(h.queue,1,data,0,data.length); 9^,Lc1"M>
} crqpV F]1]
1nQWW9i
private static class MaxHeap{ 33#0J$j7
e<=cdze
void init(int[] data){ 'SCidN(n
this.queue=new int[data.length+1]; ]vgB4~4#LP
for(int i=0;i queue[++size]=data; Pf|siC^;s~
fixUp(size); LJ*q1 ;<E
} >H'4{|
} {U!8|(
k *Q<3@S
private int size=0; [21=5S
])L A42|
private int[] queue; Kz>3 ic$I
dik:4;
public int get() { ]Bm/eRy"
return queue[1]; y$@ZN~8
} &GlwC%$S
Cg&e(
public void remove() { (@t(?Js
SortUtil.swap(queue,1,size--); RnhL< Ywu
fixDown(1); L%Ow#.[C2
} VCn{mp*h
file://fixdown >+]_5qc
private void fixDown(int k) { zY,r9<I8_x
int j; p /#$io
while ((j = k << 1) <= size) { c}y [[EX
if (j < size %26amp;%26amp; queue[j] j++; #Yr9AVr}K
if (queue[k]>queue[j]) file://不用交换 AI,(z;{P
break; T-5nB>)
SortUtil.swap(queue,j,k); uM_#
k = j; 5$wpL(:R(
} *tgnYa[l
} 89\n;5'f4
private void fixUp(int k) { KcK>%%
while (k > 1) { #bl6sa{E
int j = k >> 1; s}jHl8
if (queue[j]>queue[k]) EGZb7:Y?
break; 'h^0HE\~p
SortUtil.swap(queue,j,k); ^1Zeb$Nw'
k = j; E_8\f_%wK
} @1DX
} cfcim.jB
COW}o~3-4
} wvbPnf^y
AgFVv5
} <5NF;
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SortUtil： =,Dqqf
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package org.rut.util.algorithm; iMs5zf<M
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import org.rut.util.algorithm.support.BubbleSort; P@,nA41,j
import org.rut.util.algorithm.support.HeapSort; w9,iq@
import org.rut.util.algorithm.support.ImprovedMergeSort; 2I&o69x?
import org.rut.util.algorithm.support.ImprovedQuickSort; EI:w aIr
import org.rut.util.algorithm.support.InsertSort; Yc,7tUz#
import org.rut.util.algorithm.support.MergeSort; M-[$L XR
import org.rut.util.algorithm.support.QuickSort; 'B@e8S)y
import org.rut.util.algorithm.support.SelectionSort; *e-A6Sh
import org.rut.util.algorithm.support.ShellSort; hi0R.V&
rFC" Jx
/** yQ^($#Yk
* @author treeroot ( YQWbOk
* @since 2006-2-2 Hd,p!_
* @version 1.0 ]p;FZ4-T
*/ /Wy.>YC|
public class SortUtil { DqX{'jj
public final static int INSERT = 1; M-;4
public final static int BUBBLE = 2; DSt]{fl`P
public final static int SELECTION = 3; "dI;
public final static int SHELL = 4; (y M^
public final static int QUICK = 5; ]ut5S>,"
public final static int IMPROVED_QUICK = 6; D5:{fWVsV/
public final static int MERGE = 7; i:u1s"3~
public final static int IMPROVED_MERGE = 8; WHlYo5?
public final static int HEAP = 9; 6%fKuMpK(
C&6IU8l\
public static void sort(int[] data) { Zc!@0
sort(data, IMPROVED_QUICK); ' 4ER00
} ^|TG$`M(w
private static String[] name={ h;-yU.(w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 04*6(L)h*
}; =IUUeFv +r
Le*.*\
private static Sort[] impl=new Sort[]{ Qu7T[<
new InsertSort(), 'w14sr%
new BubbleSort(), mWyqG*-Hb
new SelectionSort(), ;>AL`M+
new ShellSort(), /__PSK
new QuickSort(), }sx_Yj
new ImprovedQuickSort(), WyZL9K{?
new MergeSort(), %/>Y/!;
new ImprovedMergeSort(), ]>+PnP35G
new HeapSort() QjC22lW-
}; #Jna6
**+e7k
public static String toString(int algorithm){ 9 Rx s
return name[algorithm-1]; +n7?S~R$
} AQc,>{Lm
EaWS. eK
public static void sort(int[] data, int algorithm) { JKX_q&bUw
impl[algorithm-1].sort(data); Fh*j#*oe
} NNF>Xa`9,
4<x'ocKlD
public static interface Sort { VL[kJi
public void sort(int[] data); '}rRzD:
} %J8|zKT5t
8kbY+W%n
public static void swap(int[] data, int i, int j) { n=,\;3Y=
int temp = data; HBY.DCN[Z
data = data[j]; wP57Pf0
data[j] = temp; u-1;'a
} 8v71e>
} >j{z>