[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; #k]0[;1os
} 6#-; ,2i
int i1=l; Tl{r D(D
int i2=mid+1; SVeU7Q6-
for(int cur=l;cur<=r;cur++){ R1rfp;
if(i1==mid+1) {;gWn'aq
data[cur]=temp[i2++]; )bJ6{&
else if(i2>r) eHZl-|-
data[cur]=temp[i1++]; [?(W7
else if(temp[i1] data[cur]=temp[i1++]; KPK!'4,cu
else w6Ny>(T/
data[cur]=temp[i2++]; ^E,UcK;
} 2]KPW*V
} '4S@:.D`
Vc<n6
} un%"s:
,S K6*tpI
改进后的归并排序: P?-44m#
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package org.rut.util.algorithm.support; `qEm5+`
|/ 7's'
import org.rut.util.algorithm.SortUtil; M& L0n%,y5
rx)Q]
/** 6<O]_HZ&
* @author treeroot gpl!Iz~5
* @since 2006-2-2 rI$10R$+H
* @version 1.0 zL}DLfy>R
*/ ZPog)d@!
public class ImprovedMergeSort implements SortUtil.Sort { Jk{2!uP
LB0=V0|
private static final int THRESHOLD = 10; +#9 (T
Unk+@$E&
/* ioQlC4Y
* (non-Javadoc) jt*@,+e|
* nr6U> KR^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =l{KYv
*/ \}c50}#0
public void sort(int[] data) { p8bTR!rvz
int[] temp=new int[data.length]; s47"JKf"
mergeSort(data,temp,0,data.length-1); EPfVS
} breVTY7 S
I<f M8t.Y>
private void mergeSort(int[] data, int[] temp, int l, int r) { `_kRvpi
int i, j, k; A}O9e
int mid = (l + r) / 2; 3j#F'M)s{
if (l == r) YkbLf#2AE|
return; ;bmd<1
if ((mid - l) >= THRESHOLD) eGg#=l=
mergeSort(data, temp, l, mid); 2j|Eh
else 4Yk(ldR~
insertSort(data, l, mid - l + 1); CdjGYS
if ((r - mid) > THRESHOLD) 21Opx~T3
mergeSort(data, temp, mid + 1, r); .$;GVJ-:5
else 1Zzw|@#>o
insertSort(data, mid + 1, r - mid); S6I8zk)Z4
5}VP-04vh
for (i = l; i <= mid; i++) { Qmn5-yiw1d
temp = data; *a4eL [
} ':@qE\(
for (j = 1; j <= r - mid; j++) { +/'jX?7x%
temp[r - j + 1] = data[j + mid]; $cedO']
} 75ob1h"
int a = temp[l]; ujedvw;sO
int b = temp[r]; ;2~Q97c0
for (i = l, j = r, k = l; k <= r; k++) { I Cs1=
if (a < b) { 8V=o%[t
data[k] = temp[i++]; bzS [X
a = temp; sa($3`d
} else { P^ VNB
data[k] = temp[j--]; 3& $E
b = temp[j]; >F v8 -
} 7+bzCDKU
} 6=k^gH[g
} W\ckt]'
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/** bB["Qd}Q
* @param data `y(3:##p
* @param l S/|8'x{<
* @param i P:+:Cm<
*/ qA42f83
private void insertSort(int[] data, int start, int len) { 622).N4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (46)v'?
} *SZ<ori
} 0NGokaD)H
} *4bV8T>0Z
} FpEdwzBb<
N'StT$(
堆排序： %k~=iDk@
1,E/So
package org.rut.util.algorithm.support; %AFy{l
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import org.rut.util.algorithm.SortUtil; ROS0Q9X
QB7<$Bp
/** 711z-
* @author treeroot p5*Y&aKj
* @since 2006-2-2 Wd7*sa3T
* @version 1.0 px*MOHq K
*/ 1/ a,7Hl
public class HeapSort implements SortUtil.Sort{ 86i =N_
.IqS}Rh
/* (non-Javadoc) `fH6E8N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u=4Rn
*/ 1DX=\BWp
public void sort(int[] data) { IpWl;i`__
MaxHeap h=new MaxHeap(); C-(&zwj?!
h.init(data); 5Z@Q^
for(int i=0;i h.remove(); *(rq AB0~
System.arraycopy(h.queue,1,data,0,data.length); sG3%~
} "}n]0 >J
$I.'7 &h;
private static class MaxHeap{ 09Fr1PL
UwLa9Dn^
void init(int[] data){ w$pv
this.queue=new int[data.length+1]; 7"gy\_M
for(int i=0;i queue[++size]=data; )3;S;b
fixUp(size); "m!Cl-+u
} -kJ`gdS
} *ce h ]v
G B15
private int size=0; 4 1Ru@
?vXy7y&4
private int[] queue; H)5]K9D
P%1s6fjU
public int get() { |2mEowAd
return queue[1]; yPL@uCzA@
} LB>!%Vx
Uu G;z5
public void remove() { x{=ty*E
SortUtil.swap(queue,1,size--); km *$;Nli
fixDown(1); O%)w!0
} hp)3@&T
file://fixdown pBHr{/\5
private void fixDown(int k) { *b> ~L
int j; $Q62 7
while ((j = k << 1) <= size) { n84*[d}t
if (j < size %26amp;%26amp; queue[j] j++; *r%=p/oQ}B
if (queue[k]>queue[j]) file://不用交换 f@Db._E
break; E}~GXG
SortUtil.swap(queue,j,k); zE<}_nA
k = j; n]|[|Rf1
} 9'}m797I'
} 'l2`05
private void fixUp(int k) { a6[bF
while (k > 1) { @;pTQ 5 I
int j = k >> 1; z55P~p
if (queue[j]>queue[k]) Zx3m$.8
break; lE /"
SortUtil.swap(queue,j,k); OD{Rh(Id
k = j; 3rs=EMz:w
} !tN]OQ)'
} ;+cZS=
^lf)9 `^U
} $6R<)]6
LvB-%@n
} ^*RmT
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SortUtil： =Bl#CE)X
V*LpO8=
package org.rut.util.algorithm; Jgb{Tl:r
F8.Fp[_tM
import org.rut.util.algorithm.support.BubbleSort; !DXKn\aQf
import org.rut.util.algorithm.support.HeapSort; jf@#&%AC9
import org.rut.util.algorithm.support.ImprovedMergeSort; V9][a
import org.rut.util.algorithm.support.ImprovedQuickSort; [/6IEt3}B
import org.rut.util.algorithm.support.InsertSort; 1jO/"d.8n
import org.rut.util.algorithm.support.MergeSort; y~jTI[kS
import org.rut.util.algorithm.support.QuickSort; [ q22?kT
import org.rut.util.algorithm.support.SelectionSort; ~#N^@a
import org.rut.util.algorithm.support.ShellSort; D>PB|rS@
% ?@PlQ
/** XzkC ]e'
* @author treeroot !Hxx6/
* @since 2006-2-2 zq8LQ4@ay
* @version 1.0 Kb#py6
*/ ["kk.*&
public class SortUtil { C&D!TR!K
public final static int INSERT = 1; skf7Si0z
public final static int BUBBLE = 2; 7&qunK'
public final static int SELECTION = 3; ['Hl$2 j
public final static int SHELL = 4; 8 W79
public final static int QUICK = 5; \IQf|
public final static int IMPROVED_QUICK = 6; ?l &S:` L
public final static int MERGE = 7; k7'_
public final static int IMPROVED_MERGE = 8; =bi:<%"
public final static int HEAP = 9; B~G?&"]
%@Bl,!BJ,
public static void sort(int[] data) { ]%!:'#
sort(data, IMPROVED_QUICK); r8A
} KC[ql}JP
private static String[] name={ *0^!%Y'/4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xrs?"]M[
}; *VG#SK
|@`F!bnLr
private static Sort[] impl=new Sort[]{ @FKm_q
new InsertSort(), kj{z;5-dl
new BubbleSort(), R?Vs8?
new SelectionSort(), @GNNi?EY
new ShellSort(), W2?6f:
new QuickSort(), G>&Tap>
new ImprovedQuickSort(), j^-E,YMC
new MergeSort(), M_lQ^7/
new ImprovedMergeSort(), CoO..
new HeapSort() >\6Tm
}; .fY1?$*6c
Ta8;
public static String toString(int algorithm){ aDceOhfx
return name[algorithm-1]; A/ZZ[B-
} jeXP|;#Una
v'na{"
public static void sort(int[] data, int algorithm) { ]/g&y5RG
impl[algorithm-1].sort(data); T5H[~b|9-
} .$&mWytw=
[CxnGeKK
public static interface Sort { ldk (zAB.
public void sort(int[] data); ;\-f7!s
} @`t#Bi9
G%5bQ|O
public static void swap(int[] data, int i, int j) { tQ~vLPi$
int temp = data; rHYSS0*3
data = data[j]; @pq2Z^SQH
data[j] = temp; y.vYT{^
} a4{~.Mp
} wzX(]BG