[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; |s_GlJV.
} DmcZta8n]
int i1=l; #dHa,HUk
int i2=mid+1; yhJ@(tu.Gd
for(int cur=l;cur<=r;cur++){ :4|4=mkr
if(i1==mid+1) I/N *gy?*
data[cur]=temp[i2++]; k5)om;.w
else if(i2>r) `]aeI'[}R
data[cur]=temp[i1++]; i XN1I
else if(temp[i1] data[cur]=temp[i1++]; \=o-
else wd6owr
data[cur]=temp[i2++]; zuCSj~
} =(^3}x
} j<$2hiI/?&
l,).p
} G~m<;
khd4ue$
改进后的归并排序: >Q*Wi
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package org.rut.util.algorithm.support; Bbc^FHip
\2z>?i)
import org.rut.util.algorithm.SortUtil; 2AdDIVYC
mkpMfPt
/** uAk.@nfiEv
* @author treeroot ?7A>+EY
* @since 2006-2-2 aq-~B~c`g
* @version 1.0 *1"+%Z^
*/ =~gvZV-<
public class ImprovedMergeSort implements SortUtil.Sort { 9YGY,sx
Y/oHu@ _
private static final int THRESHOLD = 10; +C)~bb*
i#O SC5ZI
/* UxBpdm%dvP
* (non-Javadoc) lquLT6]
* A}!J$V:w]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9BB=YnKE
*/ HOi`$vX}N
public void sort(int[] data) { - YBY[%jF>
int[] temp=new int[data.length]; Wn6Sn{8W{
mergeSort(data,temp,0,data.length-1); 1;iUWU1@
} ry]l.@o;
Ort(AfW
private void mergeSort(int[] data, int[] temp, int l, int r) { p<%d2@lp
int i, j, k; 76SXJ9@x
int mid = (l + r) / 2; JGZBL{8
if (l == r) I=#$8l.*
return; I+(nu47ZT
if ((mid - l) >= THRESHOLD) qgB_=Q#E
mergeSort(data, temp, l, mid); 9H~n_
else -g<oS9
insertSort(data, l, mid - l + 1); n+p }\msH
if ((r - mid) > THRESHOLD) <ZW-QN4
mergeSort(data, temp, mid + 1, r); XP}<N&j
else ~M$Wd2Th
insertSort(data, mid + 1, r - mid); kGJC\{N5N
}B^tL$k
for (i = l; i <= mid; i++) { >GuM]qn
temp = data; dWW.Y*339
} QWU-m{@~&
for (j = 1; j <= r - mid; j++) { O&&~NXI\
temp[r - j + 1] = data[j + mid]; 3U}%2ARo_
} ^f@=:eWI
int a = temp[l]; (At$3b6
int b = temp[r]; @+DX.9
for (i = l, j = r, k = l; k <= r; k++) { DfB7*+x{
if (a < b) { #Q5o)x
data[k] = temp[i++]; F[MFx^sT{
a = temp; MfkZ
} else { T>>c2$ x
data[k] = temp[j--]; u:b=\T L
b = temp[j]; Xc.`-J~Il
} #z42C?V
} cb bFw
} 4!$"ayGv;D
zeRyL3fnmb
/** m+9#5a-
* @param data ;a3}~s
* @param l (%9$!v{3
* @param i 0{mex4
*/ k=^xVQuI
private void insertSort(int[] data, int start, int len) { 1x^GWtRp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !m$jk2<
} Z:gyz$9w
} 7[7"A
} 6C)_
} xD$\,{
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堆排序： JI5Dy>u:
X?Au/
package org.rut.util.algorithm.support; a{e4it
\NC3'G:Ii
import org.rut.util.algorithm.SortUtil; nFn5v'g
N g,j#
/** }7X%'Bg=M
* @author treeroot 5dg(e3T
* @since 2006-2-2 p[cX O=
* @version 1.0 adw2x pj
*/ 05[SC}MCA
public class HeapSort implements SortUtil.Sort{ %)wjR/o
Pc9H0\+Xk
/* (non-Javadoc) zreU')a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0IpmRH/
*/ /tLVX} &
public void sort(int[] data) { ;rS{:
MaxHeap h=new MaxHeap(); KlqY@Xt
h.init(data); Js;h%
for(int i=0;i h.remove(); Mp]rUPK
System.arraycopy(h.queue,1,data,0,data.length); ~XIb\m9H
} ,0k;!YK
f!"w5qC^
private static class MaxHeap{ gFh*eCo
+h$ 9\
void init(int[] data){ _-\#i
this.queue=new int[data.length+1]; 4I7>f]=)
for(int i=0;i queue[++size]=data; #/]nxW.S
fixUp(size); ZB{EmB0W
} s@C}P
} =Sv/IXX\di
<uJ@:oWG7
private int size=0; ])!*_
/(LL3cZK
private int[] queue; `x|?&Ytmf9
p#Bi>/C6
public int get() { Z]ONh
return queue[1]; t^L]/$q
} 5X+A"X ;C
#1[u(<AS
public void remove() { Z{R>
SortUtil.swap(queue,1,size--); U6VKMxSJ
fixDown(1); BuwY3F\-O
} Xeajxcop#
file://fixdown U~8g_*
private void fixDown(int k) { `2snz1>!j
int j; u&NV,6Fj2[
while ((j = k << 1) <= size) { y)pk6d
if (j < size %26amp;%26amp; queue[j] j++; n|;Im&,
if (queue[k]>queue[j]) file://不用交换 6wxs1G
break; *8Z32c+C
SortUtil.swap(queue,j,k); ;bG>ZqJCVA
k = j; % `3jL7|
} .u:GjL'$
} [vgtc.V
private void fixUp(int k) { wj+*E6o-n
while (k > 1) { $^P0F9~0
int j = k >> 1; ZW}_DT0
if (queue[j]>queue[k]) 7L??ae
break; ]-q;4.
SortUtil.swap(queue,j,k); #F#%`Rv1
k = j; A's{j7
} g){<y~Mk
} v1[29t<I!
XRH!]!
} Uv.)?YeGh
wbHb;]
} OCUr{Nh
kl`W\tF
SortUtil： YMgNzu
G?ZXWu.
package org.rut.util.algorithm; weQ_*<5%
/NlGFO*Z
import org.rut.util.algorithm.support.BubbleSort; yw!{MO
import org.rut.util.algorithm.support.HeapSort; 2?5>o!C
import org.rut.util.algorithm.support.ImprovedMergeSort; Qd-A.{[h
import org.rut.util.algorithm.support.ImprovedQuickSort; $k?>DP4
import org.rut.util.algorithm.support.InsertSort; dscgj5b1~
import org.rut.util.algorithm.support.MergeSort; P%6~&woF
import org.rut.util.algorithm.support.QuickSort; [~^0gAlQC
import org.rut.util.algorithm.support.SelectionSort; Ei|\3Kx
import org.rut.util.algorithm.support.ShellSort; ]q.0!lh+WL
ZEQEx]Y
/** s>en
* @author treeroot H.c7Nle
* @since 2006-2-2 /mMV{[
* @version 1.0 :svqE+2
*/ ^"g~-
public class SortUtil { OPi0~s
public final static int INSERT = 1; ,>M[@4`,U
public final static int BUBBLE = 2; U17d>]ka
public final static int SELECTION = 3; ~zgGa:uU
public final static int SHELL = 4; 7"##]m.
public final static int QUICK = 5; Kgv T"s.
public final static int IMPROVED_QUICK = 6; %;/P&d/
public final static int MERGE = 7; ?(PKeq6
public final static int IMPROVED_MERGE = 8; g\U-VZ6;p
public final static int HEAP = 9; -12U4h<e
a}d@ T
public static void sort(int[] data) { d1*<Ll9K
sort(data, IMPROVED_QUICK); }#J/fa9 !
} XuTD\g3)
private static String[] name={ O8o3O 6[Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cR{#V1Z
}; mR~&)QBP.
[Zrr)8A
private static Sort[] impl=new Sort[]{ XG?8s &
new InsertSort(), Fs{*XKv&lH
new BubbleSort(), omFz@
new SelectionSort(), @7u0v
new ShellSort(), N;R^h? '
new QuickSort(), LLI.8kn7
new ImprovedQuickSort(), 43w}qY1
new MergeSort(), >sF)BoLc
new ImprovedMergeSort(), BWNi [^]
new HeapSort() >eaaaq9B-
}; so; ]&
G5!^*jf
public static String toString(int algorithm){ \^LFkp
return name[algorithm-1]; <$YlH@;)`a
} vIvIfE
"N;EL0=
public static void sort(int[] data, int algorithm) { =*Lfl'sr_
impl[algorithm-1].sort(data); *hrvYil2b
} H+#FSdy#
t7pFW^&
public static interface Sort { C^){.UGmJ
public void sort(int[] data); /}$+uBgJm
} hb-%_c"kq
TzZq(?V
public static void swap(int[] data, int i, int j) { b$7 +;I;
int temp = data; IgzQr>
data = data[j]; 3R/bz0 V>
data[j] = temp; 7^285)UQA
} NHt\ U9l'
} rjP/l6 ~'