[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; dGKo!;7{
} VjQ&A#
int i1=l; '|8dt "C
int i2=mid+1; dNACE*g;q
for(int cur=l;cur<=r;cur++){ 0eY!Z._^
if(i1==mid+1) J1w;m/oV
data[cur]=temp[i2++]; +nYFLe
else if(i2>r) kK&w5'
data[cur]=temp[i1++]; f$I=oN
else if(temp[i1] data[cur]=temp[i1++]; 4 m:h&^`N
else g5V\R*{
data[cur]=temp[i2++]; mU5Ox4>&9
} $1f2'_`8~
} mxNd_{n
*X0>Ru[
} 7;jD>wp9D
;V,L_"/X
改进后的归并排序: 4BCPh:
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package org.rut.util.algorithm.support; jTa\I&s,A
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import org.rut.util.algorithm.SortUtil; B;k'J:-"
25>R^2,LiE
/** s%)f<3=a
* @author treeroot IkCuw./
* @since 2006-2-2 Oeh A3$|#
* @version 1.0 Qs1p
*/ k]m ~DVS
public class ImprovedMergeSort implements SortUtil.Sort { H/o_?qK
:>FN|fz
private static final int THRESHOLD = 10; u8-6s+ O
8~Cmn%
/* 1T!o`*
* (non-Javadoc) f,G*e367:
* E'x"EN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]?6wU-a
*/ l7-lXl"%q
public void sort(int[] data) { E;Z(v
int[] temp=new int[data.length]; T}fo
mergeSort(data,temp,0,data.length-1); r=Xo;d*TE
} )7 57
p/Pus;*s
private void mergeSort(int[] data, int[] temp, int l, int r) { $1.-m{Bd
int i, j, k; $hm[x$$
int mid = (l + r) / 2; }#ink4dK:
if (l == r) WARiw[
return; |[`YGA4
if ((mid - l) >= THRESHOLD) 5}%R
mergeSort(data, temp, l, mid); z~t0l
else 5]&sXs
insertSort(data, l, mid - l + 1); D!.c??
if ((r - mid) > THRESHOLD) wV )\M]@
mergeSort(data, temp, mid + 1, r); 2Qe&FeT
else O#D{:H_dD>
insertSort(data, mid + 1, r - mid); ,C,nNaW
,5W7a
for (i = l; i <= mid; i++) { Sr \y1nt
temp = data; (WHgB0{
} oJA_"xp
for (j = 1; j <= r - mid; j++) { q/@2=$]hH3
temp[r - j + 1] = data[j + mid]; ?^U?ua6
} LK}g<!o(
int a = temp[l]; YE`Y t
int b = temp[r]; p7QZn.,=u
for (i = l, j = r, k = l; k <= r; k++) { Y%;J/4dd
if (a < b) { |OeWM
data[k] = temp[i++]; f#z:ILG=
a = temp; ,#2~<
} else { '&cH,yc;b
data[k] = temp[j--]; ao)';[%9s
b = temp[j]; B@*b 9
} C:Jfrg`
} 3CD#OCz7&
} J8)l,J"
0`"oR3JY
/** \Y!#Y#c
* @param data @ujwN([I
* @param l uH*6@aYPo
* @param i %*Ex2we&
*/ b? o
private void insertSort(int[] data, int start, int len) { hJ(vDv%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pVc+}Wzh
} - VJx)g
} jfG of*
} v,iZnANZ&P
} Lf(( zk:pt
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堆排序： JlYZ\
P!]uJ8bi
package org.rut.util.algorithm.support; ^i|R6oO_5
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import org.rut.util.algorithm.SortUtil; =.z;:0]'n
l7g'z'G
/** TVcA%]y{;
* @author treeroot 5QiQDQT}5
* @since 2006-2-2 Xr <H^X
* @version 1.0 "AUSgVE+h
*/ b*Y Wd3
public class HeapSort implements SortUtil.Sort{ sQ`G'<!
P] *x6c^n
/* (non-Javadoc) f|,Kh1{e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (ODwdN7;
*/ ,gw9R9 x_
public void sort(int[] data) { 5TJd9:\Af
MaxHeap h=new MaxHeap(); zjA]Tr
h.init(data); %rb$tKk
for(int i=0;i h.remove(); Os<E7l zqO
System.arraycopy(h.queue,1,data,0,data.length); Wu 0:X*>}p
} J$51z
#DgHF*GG+>
private static class MaxHeap{ J'Pyn
o*)Sg6Yk
void init(int[] data){ 4fsd5#
this.queue=new int[data.length+1]; VaD+:b4
for(int i=0;i queue[++size]=data; }O*`I(
fixUp(size); d~~kJKK
} ?5EH/yV;
} bVUIeX'
1<G+KC[F
private int size=0; ] :;x,$k
xoo,}EY
private int[] queue; /-p!|T}w
-g~+9/;n
public int get() { uj6'T Sl
return queue[1]; d#v@NuO6 h
} 'O(=Pz
1*=ev,Z
public void remove() { tQ{/9bN?P
SortUtil.swap(queue,1,size--); tfU*U>j
fixDown(1); lBbb7*Ljt<
} WrGA7&!+
file://fixdown >SI'Q7k
private void fixDown(int k) { B)Y[~4o
int j; F(hPF6Zx(
while ((j = k << 1) <= size) { 2'@m'4-N
if (j < size %26amp;%26amp; queue[j] j++; w&?XsO@0W
if (queue[k]>queue[j]) file://不用交换 -F7F 6!s
break; -!XG>Z
SortUtil.swap(queue,j,k); $/M-@3wro
k = j; -UkK$wP5
} w!"L\QT
} #zl1#TC{(
private void fixUp(int k) { *Y(59J2
while (k > 1) { ARu_S B
int j = k >> 1; Jb"FY:/Qv+
if (queue[j]>queue[k]) 8b?nr;@
break; RU~na/3
SortUtil.swap(queue,j,k); K+`GVmD
k = j; 6X@z(EEL
} NwF"Zh5eMW
} .u)KP*_
w80X~
} 4fKvB@O@.
WkuCnT
} hq7f"`
P7-k!p"
SortUtil： y8$3kXh
9Rk(q4.OP
package org.rut.util.algorithm; z[f]mU
%AO6=
import org.rut.util.algorithm.support.BubbleSort; zls^JTE
import org.rut.util.algorithm.support.HeapSort; BHY-fb@R]H
import org.rut.util.algorithm.support.ImprovedMergeSort; <~dfp
import org.rut.util.algorithm.support.ImprovedQuickSort; iTinZ!Ut
import org.rut.util.algorithm.support.InsertSort; eF%M2:&c;
import org.rut.util.algorithm.support.MergeSort; :XY%@n
import org.rut.util.algorithm.support.QuickSort; gg`{kN^r.a
import org.rut.util.algorithm.support.SelectionSort; {>hxmn
import org.rut.util.algorithm.support.ShellSort; yc*cT%?g
;((t|
/** 0hoMf=bb$
* @author treeroot ^P9mJ:
* @since 2006-2-2 C[,h!
* @version 1.0 K.yc[z)un
*/ +~V_^-JG&
public class SortUtil { ~a_hOKU5
public final static int INSERT = 1; 6{5T^^x?<
public final static int BUBBLE = 2; K ar!
public final static int SELECTION = 3; fcdXj_u
public final static int SHELL = 4; d9JAt-6z2
public final static int QUICK = 5; C+/EPPi
public final static int IMPROVED_QUICK = 6; n*9QSyJN]
public final static int MERGE = 7; 3YLK?X8
public final static int IMPROVED_MERGE = 8; p|gVIsg[-e
public final static int HEAP = 9; DTC IVLV
ky|kg@n{
public static void sort(int[] data) { <p<6!tdO
sort(data, IMPROVED_QUICK); x9F*$G
} Y"t|0dO%b
private static String[] name={ pbG-uH^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t?&;
}; =A5i84y.2u
7d.H8C2
private static Sort[] impl=new Sort[]{ pzRVX8
new InsertSort(), dUB;ZB7
new BubbleSort(), y3(~8n
new SelectionSort(), 9=}#.W3.
new ShellSort(), r2f%E:-0G
new QuickSort(), \GHj_r
new ImprovedQuickSort(), S'RRe84C
new MergeSort(), V #vkj
new ImprovedMergeSort(), @8\0@[]
new HeapSort() q>%.zc[x
}; '\QJ{/JV
MX*4d{l
public static String toString(int algorithm){ rk%pA-P2
return name[algorithm-1]; >Ch2Ep
} 6 [bQ'Ir^8
q !}~c
public static void sort(int[] data, int algorithm) { M%jR`qVFg.
impl[algorithm-1].sort(data); : HU|BJ>
} M.SF}U
-AL^
public static interface Sort { 'xuxMav6m
public void sort(int[] data); V,zFHXO
} on hLhrZ
43=)akJi
public static void swap(int[] data, int i, int j) { OtAAzc!dQ
int temp = data; ??Urm[Y.Z
data = data[j]; 0f_`;{
data[j] = temp; L8E4|F}
} w}/+3z
} v"Bm4+c&0