[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; 8'"/gC{
} %@93^q[\2
int i1=l; NoZ4['NI\
int i2=mid+1; ?{,)XFck
for(int cur=l;cur<=r;cur++){ jnzz~:
if(i1==mid+1) ysJhP .
data[cur]=temp[i2++]; !9LAXM
else if(i2>r) ' 5 qL
data[cur]=temp[i1++]; B4Af
else if(temp[i1] data[cur]=temp[i1++]; 50bP&dj&
else s*/ G- lY
data[cur]=temp[i2++]; .N5R?fmD
} rbun5&RCyW
} gc7:Rb^E5t
Rn(F#tI
} I+?$4SC
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改进后的归并排序: _AHB|P I
3KFrVhB=
package org.rut.util.algorithm.support; *Gh8nQbh
ajW$d!
import org.rut.util.algorithm.SortUtil; bA^:p3
[-Tt11
/** >\x_"oR
* @author treeroot zHc4e
* @since 2006-2-2 2a(yR>#
* @version 1.0 )7"DR+;:
*/ Xa%&.&V
public class ImprovedMergeSort implements SortUtil.Sort { $_7d! S"
r]//Q6|S
private static final int THRESHOLD = 10; nBIv{
$CwTNm?
/* d>b,aj(
* (non-Javadoc) NT9- j#V
* !na0Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hOLy*%
*/ }V#9tWW
public void sort(int[] data) { aco}pXz
int[] temp=new int[data.length]; [xs)u3b
mergeSort(data,temp,0,data.length-1); JvWs/AG1
} grfdvN
@uM3iO7&
private void mergeSort(int[] data, int[] temp, int l, int r) { y7IbE
int i, j, k; ;0Ct\[eh
int mid = (l + r) / 2; S}p&\w H
if (l == r) yZ~eLWz
return; b}?@syy8
if ((mid - l) >= THRESHOLD) . I&)MZ>n
mergeSort(data, temp, l, mid); c>WpOZ,
else &0 )xvZ
insertSort(data, l, mid - l + 1); ZJI1NCBZ
if ((r - mid) > THRESHOLD) Up/u|A$0V
mergeSort(data, temp, mid + 1, r); 07LL)v~
else W/ZahPPq
insertSort(data, mid + 1, r - mid); "G-0iKW;
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for (i = l; i <= mid; i++) { b^l -*4
temp = data; ;$tv8%_L[
} vD)A)
for (j = 1; j <= r - mid; j++) { T.w}6?2
temp[r - j + 1] = data[j + mid]; $L&9x3+?Kg
} B[/['sD
int a = temp[l]; LY88;*:S
int b = temp[r]; e<O;pM:
for (i = l, j = r, k = l; k <= r; k++) { lF}$`6
if (a < b) { i h$@:^\
data[k] = temp[i++]; vPl6Dasr
a = temp; WVT5VJ7*
} else { ZG\ I1
data[k] = temp[j--]; oA3W {
b = temp[j]; .1z$ A
} J.e8UQ@=5
} K'{W9~9Lq
} LnI{S{]wDh
~q]|pD"\K|
/** :af;yu
* @param data "U5Ln2X{J
* @param l w(e+o.:
* @param i jQ_|z@OV
*/ $G-N0LV
private void insertSort(int[] data, int start, int len) { WP%{{zR$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :U-US|)(2
} ^;CR0.4
} jY#(A23
} )*TW\v`B
} [`zbf_RyO
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堆排序： e2-70UvW^
1y)$[e
package org.rut.util.algorithm.support; eA*Jfb
v-7Rb)EP
import org.rut.util.algorithm.SortUtil; rz[uuY7
EDgob^>
/** Lr24bv\
* @author treeroot =N@)CB7a
* @since 2006-2-2 L`HH);Ozw
* @version 1.0 BudWbZ5>Ep
*/ we H@S
public class HeapSort implements SortUtil.Sort{ cpF1XpvT
-|k&L}\OB0
/* (non-Javadoc) S4{Mu(^xT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /:Z~"Q*r
*/ _8NEwwhc
public void sort(int[] data) { ;1R?9JN"
MaxHeap h=new MaxHeap(); X8,7_D$
h.init(data); %g]$Vfpy
for(int i=0;i h.remove(); ,3J`ftCV
System.arraycopy(h.queue,1,data,0,data.length); R!_8jD:$
} rKy-u
V$-~%7@>;9
private static class MaxHeap{ 1|l)gfcP
VT5cxB<
void init(int[] data){ oXQ<9t1(
this.queue=new int[data.length+1]; x#:BE
for(int i=0;i queue[++size]=data; M~ i+F0
fixUp(size); dxkRk#mf:
} e$ XY\{
} 22al
;Oi[:Ck
private int size=0; :Er^"9'A2
_[$T29:8\]
private int[] queue; 56bud3CVs
EZ%w=
public int get() { *793H\
return queue[1]; T]Tdx.B
} ,N@Yk.
x!"SD3r=4>
public void remove() { Bg 7j5
SortUtil.swap(queue,1,size--); L= :d!UF
fixDown(1); S/nj5Lh
} Hyq@O8
file://fixdown 't0+:o">:
private void fixDown(int k) { v.l7Q
int j; 68koQgI[^
while ((j = k << 1) <= size) { ( K6~Tj
if (j < size %26amp;%26amp; queue[j] j++; `?zg3GD_
if (queue[k]>queue[j]) file://不用交换 o[bE
break; 96"yNqBf
SortUtil.swap(queue,j,k); gnQo1q{ 4
k = j; E'e8&3!bx
} Q)LXL.0h
} tb:,Uf>E
private void fixUp(int k) { M('s|>\l
while (k > 1) { =9qGEkd3
int j = k >> 1; lC'{QUC
if (queue[j]>queue[k]) u0bfX,e2U
break; ?Do^stq'4
SortUtil.swap(queue,j,k); c-4m8Kg?L
k = j; _KB{J7bs<a
} V>b2b5QAH,
} }J ei$0x
mQd4#LJ_
} _pz,okO[V
K0EY<Ltq
} v`#j
,:#,}w_HyO
SortUtil： qj~flw1:
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package org.rut.util.algorithm; lZ|L2Yg3uB
Q00R<hu@F
import org.rut.util.algorithm.support.BubbleSort; uipq=Yp.
import org.rut.util.algorithm.support.HeapSort; \H Wcd|
import org.rut.util.algorithm.support.ImprovedMergeSort; EJf#f
import org.rut.util.algorithm.support.ImprovedQuickSort; :]P~.PD5,
import org.rut.util.algorithm.support.InsertSort; GXDC@+$14
import org.rut.util.algorithm.support.MergeSort; mu6039qy
import org.rut.util.algorithm.support.QuickSort; s<[A0=LH
import org.rut.util.algorithm.support.SelectionSort; !c3```*
import org.rut.util.algorithm.support.ShellSort; EMVk:Vt]
1R0ffP]
/** r\$6'+Si
* @author treeroot r4O|()
* @since 2006-2-2 o&(wg(Rv
* @version 1.0 E,{GU
*/ {>8Pl2J
public class SortUtil { z%(Fo2)^
public final static int INSERT = 1; BdN8 ^W
public final static int BUBBLE = 2; :83,[;GO2
public final static int SELECTION = 3; FJP< bREQ
public final static int SHELL = 4; ^4c,U9J=
public final static int QUICK = 5; ;B&^yj&;
public final static int IMPROVED_QUICK = 6; `I5O4|K)
public final static int MERGE = 7; R/^@cA
public final static int IMPROVED_MERGE = 8; e]lJqC
public final static int HEAP = 9; |u@+`4o
:.*HQt9N
public static void sort(int[] data) { xK(IS:HJ*
sort(data, IMPROVED_QUICK); >[ eW">:>K
} ze`1fO|%
private static String[] name={ 6iG(C.b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '.?^uM
}; b2N6L2~V
6X/wdk
private static Sort[] impl=new Sort[]{ ev9;Ld
new InsertSort(), "\e:h| .G
new BubbleSort(), $}t=RW
new SelectionSort(), sLb8*fak
new ShellSort(), "`pNH'
new QuickSort(), S]}}A
new ImprovedQuickSort(), n.*3,4.]
new MergeSort(), B[r<m J
new ImprovedMergeSort(), > 2#%$lX6
new HeapSort() <OTWT`G2
}; nqT>qS[Z
RctU'T
public static String toString(int algorithm){ |,b2b2v?
return name[algorithm-1]; zj<ahg%z
} \V,c]I
(8.{+8o
public static void sort(int[] data, int algorithm) { j~bAbOX12
impl[algorithm-1].sort(data); iOXZ]Xj5
} L>dkrr)e
74+A+SK[
public static interface Sort { (S`6Q
public void sort(int[] data); zDD4m`2
} NUCiY\td
)l&D]3$6K
public static void swap(int[] data, int i, int j) { #%:c0=
int temp = data; Gav"C{G
data = data[j]; H$!+A
data[j] = temp; Z7fg 25
} qj&bo
} .20V 3