[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; 2wWL]`(E
} {9<2{$Og
int i1=l; o%Lk6QA$
int i2=mid+1; 'U)|m
for(int cur=l;cur<=r;cur++){ H]. 4~ 8
if(i1==mid+1) "mAVkq~
data[cur]=temp[i2++]; EX[X|"r
else if(i2>r) fuQ|[tpvQG
data[cur]=temp[i1++]; c 25wm\\
else if(temp[i1] data[cur]=temp[i1++]; 2O|o%`?
else VZ*Q|
data[cur]=temp[i2++]; 4[]R?lL
} E(M\U5o:
} N1UE u,j
|67j__XC
} XbJ=lH
3:a}<^DuCS
改进后的归并排序: s &v<5W2P
zjh&?G]:G
package org.rut.util.algorithm.support; EjB<`yT
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import org.rut.util.algorithm.SortUtil; }[PbA4l.g
twx8TQ9
/** E~zLhJTUL'
* @author treeroot #UC4l]Ru A
* @since 2006-2-2 &_&])V)<\S
* @version 1.0 dCcV$BX,K
*/ Yuze9b\[
public class ImprovedMergeSort implements SortUtil.Sort { "2CiW6X[M
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private static final int THRESHOLD = 10; 5/mW:G,&
0-g,C=L
/* dH!k{3bL
* (non-Javadoc) V0L^pDLOV
* 71Ssk|L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LaJc;Jt$
*/ 6.~(oepu
public void sort(int[] data) { oC U8;z
int[] temp=new int[data.length]; <l5{!g
mergeSort(data,temp,0,data.length-1); ")HTUlcAe}
} v>g1\yIw
[j}%&$
private void mergeSort(int[] data, int[] temp, int l, int r) { s.KJYP
int i, j, k; m |,ocz
int mid = (l + r) / 2; _Ux>BJmP
if (l == r) >S{1=N@Ev=
return; *ARro Ndr
if ((mid - l) >= THRESHOLD) 4ej$)AdW3
mergeSort(data, temp, l, mid); #>~$`Sg
else Ft`#]=IS
insertSort(data, l, mid - l + 1); \{G6!dV|S
if ((r - mid) > THRESHOLD) C-_u; NEu
mergeSort(data, temp, mid + 1, r); 9A3Q&@,
else u bP2ws
insertSort(data, mid + 1, r - mid); GWA_,/jS%
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for (i = l; i <= mid; i++) { &.<{c `-
temp = data; &J"a`l2
} m^T$H_*;
for (j = 1; j <= r - mid; j++) { ,)GCg@7B
temp[r - j + 1] = data[j + mid]; 15U=2j*.b
} .1|'9@]lj4
int a = temp[l]; &r DOqj
int b = temp[r]; d-N<VVcy\
for (i = l, j = r, k = l; k <= r; k++) { q.<q(r
if (a < b) { }tv-
data[k] = temp[i++]; c!Pi)
a = temp; qI;k2sQR
} else { 2E2J=Do
data[k] = temp[j--]; sd8o&6
b = temp[j]; \~y>aYy
} .D4D!!
} 4ItXZo
} J4lE7aFDA~
Fl*@@jQ8cV
/** 0U`Ic_.
* @param data Q `E{Oo,
* @param l e>z7?"N
* @param i 8%`Sx[
*/ \=yg@K?"AJ
private void insertSort(int[] data, int start, int len) { ItOVx!"@9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6Mk@,\1
} C(,s_Ks
} M9f*7{c
} Qr0JJoHT
} )b!q
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堆排序： #v(+3Hp
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package org.rut.util.algorithm.support; -BoN}xE4
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import org.rut.util.algorithm.SortUtil; ?LNwr[C0
Vs07d,@w>
/** mDV 2vg
* @author treeroot }#E4t3
* @since 2006-2-2 ]L&_R^
* @version 1.0 dr/!wr'&hS
*/ ,#WXAAmm
public class HeapSort implements SortUtil.Sort{ rSEJ2%iF*
w$B7..r
/* (non-Javadoc) z6{0\#'K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {L4^IKI
*/ P_ZguNH
public void sort(int[] data) { K}Z'!+<U
MaxHeap h=new MaxHeap(); R2~Rqlti
h.init(data); C)ChF`Ru':
for(int i=0;i h.remove(); E&K8hY%5
System.arraycopy(h.queue,1,data,0,data.length); t"BpaA^gO
} {'r*Jb0
| c8u
private static class MaxHeap{ Gu_s:cgB9F
r%B5@+{so
void init(int[] data){ 5SKu\H\
this.queue=new int[data.length+1]; !8A5Y[(XD
for(int i=0;i queue[++size]=data; 3}T&|@*
fixUp(size); f%|g7[
} @wa/p`gj5w
} i&bttSRNV
{u5)zVYC,U
private int size=0; UHCx}LGe
Y*AHwc<w`
private int[] queue; H+: $ 7;
g@EKJFjl
public int get() { f,uxoAS
return queue[1]; Fvv6<E
} ev@1+7(
p,1RRbyc
public void remove() { b<7.^
SortUtil.swap(queue,1,size--); dm 2_Fj
fixDown(1); y-Ol1R3:c#
} $qEJO=v
file://fixdown ims *|~{sr
private void fixDown(int k) { /JfXK$`
int j; 97&6iTYA
while ((j = k << 1) <= size) { U *I52$
if (j < size %26amp;%26amp; queue[j] j++; ~\kRW6
if (queue[k]>queue[j]) file://不用交换 O;zW'*c+
break; ~_oTEXT^O
SortUtil.swap(queue,j,k); ]O\6.>H
k = j; ^wHO!$
} +?L~fM69B
} oJR!0nQ
private void fixUp(int k) { EgO4:8$h
while (k > 1) { r94BEC 2
int j = k >> 1; G.N3R
if (queue[j]>queue[k]) FUOvH85f
break; p75w^
SortUtil.swap(queue,j,k); w5|"cD#8A
k = j; 2Hd6
} k |Lm;g
} F 4hEfO3
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} [v&_MQ
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} Ue\&
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SortUtil： nOB ]?{X
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package org.rut.util.algorithm; rm cy-}e
&]M<G)9
import org.rut.util.algorithm.support.BubbleSort; xv ja
import org.rut.util.algorithm.support.HeapSort; mPu5%%
import org.rut.util.algorithm.support.ImprovedMergeSort; r*$"]{m}
import org.rut.util.algorithm.support.ImprovedQuickSort; &O[o;(}mFI
import org.rut.util.algorithm.support.InsertSort; y>o#Hq&qM
import org.rut.util.algorithm.support.MergeSort; N7;2BUIXJ
import org.rut.util.algorithm.support.QuickSort; Du{]r[[C
import org.rut.util.algorithm.support.SelectionSort; [ wROIvV
import org.rut.util.algorithm.support.ShellSort; X}Csl~W8in
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/** v ;9s
* @author treeroot U8c0C/
* @since 2006-2-2 f+1]#"9i|
* @version 1.0 V- vVb
*/ #"Zr#P{P
public class SortUtil { %_u3Np
public final static int INSERT = 1; e^FS/=
public final static int BUBBLE = 2; 1idEm*3&(
public final static int SELECTION = 3; IKU-
public final static int SHELL = 4; (u*]&yk
public final static int QUICK = 5; dfrq8n]
public final static int IMPROVED_QUICK = 6; *7R3EUUk
public final static int MERGE = 7; toCN{[
public final static int IMPROVED_MERGE = 8; !pN,,H6Y
public final static int HEAP = 9; o0/03O
]EK"AuEz`
public static void sort(int[] data) { NBeGmC|
sort(data, IMPROVED_QUICK); OVd"'|&6_
} wF%XM_M
private static String[] name={ W$3p,VTMmB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5|Y4GQVz
}; !98s[)B:
Gzs x0%`)
private static Sort[] impl=new Sort[]{ $0 li"+
new InsertSort(), Y,8M[UIK
new BubbleSort(), IOJfv8
new SelectionSort(), Ri,UHI4 W
new ShellSort(), 9+/<[w7
new QuickSort(), 3!d|K%J
new ImprovedQuickSort(), $0wl=S
new MergeSort(), c_".+Fa
new ImprovedMergeSort(), Zj},VB*T
new HeapSort() J#D!J8KP7
}; GJW1|Fk
fb#Ob0H
public static String toString(int algorithm){ bc&:v$EGy
return name[algorithm-1]; $;@s
} n3)g{K^
UyJ5}fBJ
public static void sort(int[] data, int algorithm) { 6 o+zhi;E
impl[algorithm-1].sort(data); h)YqC$A-s
} <oR Nd3d
+/Z:L$C6
public static interface Sort { 2=#O4k.@
public void sort(int[] data); / '7WL[<
} OaZ~
];< [Cln%
public static void swap(int[] data, int i, int j) { Bg#NB
int temp = data; ]];7ozS)X
data = data[j]; }q~A( u
data[j] = temp; `j<'*v zo
} `yVJ `}hm
} 5-+Y2tp}