[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; ];8S<KiS~
} .DG`~Fpk
int i1=l; UY$Lqe~
int i2=mid+1; 7F@#6
for(int cur=l;cur<=r;cur++){ @Xg5E
if(i1==mid+1) cHjnuL0fsy
data[cur]=temp[i2++]; G=l-S\0@
else if(i2>r) kx31g,cf]w
data[cur]=temp[i1++]; ;dVYR=l
else if(temp[i1] data[cur]=temp[i1++]; FEwPLViso
else ;"Q.c#pA$g
data[cur]=temp[i2++]; oK#UEn
} %29lDd(<
} !)$e+o^W
AD^Q`7K?uR
} vkE a[7
ee\QK,QV
改进后的归并排序: JsD|igqF-
!}PZCbDhL
package org.rut.util.algorithm.support; ptMDhMVW
r:-,qy
import org.rut.util.algorithm.SortUtil; %"CF-K@th
f'?FYBL
/** yHYK,3/C,
* @author treeroot ,,HoD~]rd
* @since 2006-2-2 &-zW1wf
* @version 1.0 L| K8
*/ OD;F{Hc
public class ImprovedMergeSort implements SortUtil.Sort { {DWL 5V#M
[Lal_}m?
private static final int THRESHOLD = 10; S}/5W
!M@jW[s
/* PB(I3R9
* (non-Javadoc) _`.Wib+
* 5DxNHEuS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 13K|=6si
*/ ^n~bx*f
public void sort(int[] data) { 1'4?}0Dok
int[] temp=new int[data.length]; )/cf%
mergeSort(data,temp,0,data.length-1); _{&bmE
} =k^ d5
=M`Xu#eRk
private void mergeSort(int[] data, int[] temp, int l, int r) { %i5tf;x6i
int i, j, k; {L/hhKT
int mid = (l + r) / 2; CWY-}M
if (l == r) jG["#5<?
return; 8@,8j!$8G
if ((mid - l) >= THRESHOLD) )}lO%B'K
mergeSort(data, temp, l, mid); <%?!3 n*
else vR4omB{
insertSort(data, l, mid - l + 1); |'qvq/#^
if ((r - mid) > THRESHOLD) sT'j36Nc<,
mergeSort(data, temp, mid + 1, r); *aW:Z6N
else wA\a ]X.
insertSort(data, mid + 1, r - mid); Qv6-,6<
suHisc*
for (i = l; i <= mid; i++) { >!MRk[@ V-
temp = data; xSrjN
} 7:e5l19 uI
for (j = 1; j <= r - mid; j++) { Y_nl9}&+C0
temp[r - j + 1] = data[j + mid]; GB4^4Ajx
} B&m6N,
int a = temp[l]; W:>XXUU
int b = temp[r]; yT|44 D2j
for (i = l, j = r, k = l; k <= r; k++) { N qS]dH61
if (a < b) { r;_*.|AH
data[k] = temp[i++]; GBY{O2!3u
a = temp; w8cbhc
} else { ,H>'1~q
data[k] = temp[j--]; mO2u9?N
b = temp[j]; _%G;^ b
} ~S\8 '
} 5a&BgBO1M
} y({lE3P
pi5DDK
/** [<WoXS1LX
* @param data [ J4n%
* @param l CsEU:v
* @param i ny:/a
*/ RTr"#[
private void insertSort(int[] data, int start, int len) { I]a [Ngj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f7/M_sx
} OlP1Zd/l
} q$PO.#
} {F;"m&3Lt
} {r%T_BfY
'^`iF,rg
堆排序： wZVLpF+7
XT?wCb41R
package org.rut.util.algorithm.support; Clb7=@f
w=FU:q/
import org.rut.util.algorithm.SortUtil; 5mX^{V&^
mt~E&Z(A
/** 6)c-s|#
* @author treeroot PD~vq^@Q
* @since 2006-2-2 nNf*Q r%Z
* @version 1.0 @z^7*#vQv
*/ |w{C!Q8l
public class HeapSort implements SortUtil.Sort{ 0g9y4z{H
>qBJK)LHOv
/* (non-Javadoc) .03Rp5+v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hb/8X !=
*/ nk;^sq4M:
public void sort(int[] data) { a$\Bt_
MaxHeap h=new MaxHeap(); M%WO
h.init(data); j2%fAs<
for(int i=0;i h.remove(); @}2EEo#
System.arraycopy(h.queue,1,data,0,data.length); 51tZ:-1!
} |{JI=$
Shv$"x:W
private static class MaxHeap{ OZA^L;#>
V"B/4v>
void init(int[] data){ )2Bb,p<Wr
this.queue=new int[data.length+1]; H>o \C
for(int i=0;i queue[++size]=data; %|j8#09
fixUp(size); A/{!w"G
} p[&b@U#
} oJQ \?~
z;MPp#Y
private int size=0; t)= dKC
$+PyW( r
private int[] queue; ?L0|$#Iw
X`J86G)
public int get() { P| hwLM
return queue[1]; *s<cgPKJ@
} 4;Vi@(G)
vCXmu_S4^>
public void remove() { w ^?#xU1.i
SortUtil.swap(queue,1,size--); 2x<!>B
fixDown(1); Fy0sn|
} L6#4A3yh
file://fixdown 0wCQPvO
private void fixDown(int k) { A!Tm[oqu
int j; fzA Fn$[
while ((j = k << 1) <= size) { UB+7]S
if (j < size %26amp;%26amp; queue[j] j++; _90<*{bt.
if (queue[k]>queue[j]) file://不用交换 MiR$N
break; *;xGH
SortUtil.swap(queue,j,k); ]s!id[j
k = j; Y`(~eNX^%
} ?z2!?
} {3.n!7+
private void fixUp(int k) { CRD=7\0(D+
while (k > 1) { Ql%B=vgKL
int j = k >> 1; UNK.39
if (queue[j]>queue[k]) Nukyvse
break; KMK8jJ
SortUtil.swap(queue,j,k); |f/Uzd ~
k = j; VN(*m(b
} t{QQ;'
} O#t[YP
dPbn[*:
} ~9xkiu5~
axDa&7%
} Zw _aeJ
cGR)$:
SortUtil： #C~ </R%
c*]f#yr?
package org.rut.util.algorithm; gcB hEw
W#E(?M[r
import org.rut.util.algorithm.support.BubbleSort; h"/'H)G7_&
import org.rut.util.algorithm.support.HeapSort; ^*.+4iHx
import org.rut.util.algorithm.support.ImprovedMergeSort; hlZ{bO'f
import org.rut.util.algorithm.support.ImprovedQuickSort; D.Cn`O}
import org.rut.util.algorithm.support.InsertSort; ~( 0bqt3c
import org.rut.util.algorithm.support.MergeSort; D9NQ3[R 9
import org.rut.util.algorithm.support.QuickSort; >*opEI+
import org.rut.util.algorithm.support.SelectionSort; (wuciKQ
import org.rut.util.algorithm.support.ShellSort; d7mn(= &
Tl'wA^~H
/** j"hEs(t
* @author treeroot /zb/am1#
* @since 2006-2-2 %P M#gnt@
* @version 1.0 D[?;+g/
*/ lM}-'8tt?
public class SortUtil { v|\#wrCT?
public final static int INSERT = 1; _)~1'tCs}h
public final static int BUBBLE = 2; @;$cX2
public final static int SELECTION = 3; y.}{KQ"a*
public final static int SHELL = 4; MG~Z)+g=y
public final static int QUICK = 5; sW'_K.z
public final static int IMPROVED_QUICK = 6; EI7n|X a1q
public final static int MERGE = 7; [3s-S+n @
public final static int IMPROVED_MERGE = 8; GlTpK^.
public final static int HEAP = 9; Kw$@_~BJ6
:o8|P
public static void sort(int[] data) { 4hLk+z<n
sort(data, IMPROVED_QUICK); @/|g|4
} <#4""FO*
private static String[] name={ 4L ]4WVc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~CbiKez
}; '|Bk}pl7
:Yn.Wv-
private static Sort[] impl=new Sort[]{ 6i~|<vcSP
new InsertSort(), /9&!u )+
new BubbleSort(), l@*$C&E
new SelectionSort(), :"Otsb7
new ShellSort(), s]OZ+^Z
new QuickSort(), rks"y&&Nc
new ImprovedQuickSort(), 2oV6#!{Z
new MergeSort(), ?jUgDwc(w
new ImprovedMergeSort(), J]XLWAM
new HeapSort() }e/vKWfT
}; xw_klHL-o
]u!s-=3s
public static String toString(int algorithm){ HcJ!(
return name[algorithm-1]; k}qQG}hB
} |9\i+)C
H"(#Tp ZTE
public static void sort(int[] data, int algorithm) { .?5 ~zK
impl[algorithm-1].sort(data); =X^a
} aJf3rHX
%&&)[
public static interface Sort { }4!}vkVx
public void sort(int[] data); LKp;sV
} 3<+ZA-2
V0Oqq0\
public static void swap(int[] data, int i, int j) { }BU%<5CQ
int temp = data; ?A7 AVR
data = data[j]; -,+C*|mu
data[j] = temp; m//aAxmB
} NJgu`@YoI
} WZn;u3,R