[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; EZ;"'4;W
} :#k &\f-Y
int i1=l; ]i<[d,
int i2=mid+1; 5{e,L>H<
for(int cur=l;cur<=r;cur++){ j^tW Iz
if(i1==mid+1) 39wa|:I
data[cur]=temp[i2++]; Vwk#qgnX
else if(i2>r) %UUH"
data[cur]=temp[i1++]; 9^FziM
else if(temp[i1] data[cur]=temp[i1++]; 5irwz4.4
else FGWN}&K
data[cur]=temp[i2++]; (Rt7%{*
} bHLT}x/Gw
} G;NF5`*4mc
dovZ#D@Q
} ]?O2:X
@Jm7^;9/
改进后的归并排序: )a@k]#)Skm
5tjP6Z`!9`
package org.rut.util.algorithm.support; W&(k!6<x
!-`Cp3gqHr
import org.rut.util.algorithm.SortUtil; *]hBGr#6
goat<\a
/** m7EcnQf
* @author treeroot E%oY7.~-
* @since 2006-2-2 j~j jX
* @version 1.0 -=s(l.?Hm5
*/ O,aS`u &
public class ImprovedMergeSort implements SortUtil.Sort { 2{-ZD ,(u7
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private static final int THRESHOLD = 10; X@@8"@/u|*
yRp"jcD
/* 98=wnWX6$
* (non-Javadoc) jls-@Wl
* (Yo>Oh4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RrUBpqA
*/ .#02 ngh
public void sort(int[] data) { ['8!qr
int[] temp=new int[data.length]; _@S`5;4x
mergeSort(data,temp,0,data.length-1); |@NiW\O
} ljl^ GFo
.ERO|$fv
private void mergeSort(int[] data, int[] temp, int l, int r) { I>L-1o|^
int i, j, k; 4DZ-bt'
int mid = (l + r) / 2; zOg7raIa
if (l == r) Y0?5w0{
return; ()&~@1U
if ((mid - l) >= THRESHOLD) ^B8b%'\
mergeSort(data, temp, l, mid); CLvX!O(~
else gbVdOm
insertSort(data, l, mid - l + 1); U9b?i$
if ((r - mid) > THRESHOLD) (/35pg6\
mergeSort(data, temp, mid + 1, r); @gY)8xMbA
else V#VN%{
insertSort(data, mid + 1, r - mid); 7{&|;U
&0f5:M{P
for (i = l; i <= mid; i++) { %v20~xW:o
temp = data; 8@so"d2e
} y;/VB,4V
for (j = 1; j <= r - mid; j++) { Zd"^</ S
temp[r - j + 1] = data[j + mid]; : ]C~gc
} N('&jHF
int a = temp[l]; n:MdYA5,m
int b = temp[r]; 6@DF
for (i = l, j = r, k = l; k <= r; k++) { /Q,mJ.CnSR
if (a < b) { J:V?EE,\-
data[k] = temp[i++]; jy-{~xdg[
a = temp; >/|q:b^2r
} else { /SYw;<=
data[k] = temp[j--]; @)J+,tg/7
b = temp[j]; M4as
} ;!(<s,c#:
} 9(QJT}qC
} j?'GZ d"B
.Wjs~0c
/** H;RwO@v
* @param data "AE5 V'
* @param l Omd .9
* @param i ]+X@ 7
*/ t.mVO]dsj
private void insertSort(int[] data, int start, int len) { -GxaV #{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B}^w_C2
} Hh+ 2mkg
} eM8}X[
} c/sC&i;%O
} dAuJXGo
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堆排序： S]+:{9d
K6R.@BMN
package org.rut.util.algorithm.support; gEjdN.
d3xmtG {i
import org.rut.util.algorithm.SortUtil; =?!wXOg_
;+"+3
/** \ Yx/(e
* @author treeroot %7|9sQ:
* @since 2006-2-2 `nu''B H
* @version 1.0 FJMrs[
*/ \-g)T}g,I
public class HeapSort implements SortUtil.Sort{ .mR8q+I6
<7~'; K
/* (non-Javadoc) q<M2,YrbAI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jyCXJa-!-
*/ q@{Bt{$x
public void sort(int[] data) { GWfL
MaxHeap h=new MaxHeap(); $&=S#_HQS
h.init(data); c Vc-
for(int i=0;i h.remove(); r]6C
System.arraycopy(h.queue,1,data,0,data.length); |:gf lseE
} OGl}-kw
W)bLSL]`E
private static class MaxHeap{ ueUuJxq)
7j-4TY~
void init(int[] data){ {tWf
this.queue=new int[data.length+1]; ^~etm
for(int i=0;i queue[++size]=data; ')cMiX\v
fixUp(size); > ;*b|Ik
} y+NN< EY@
} `x*Pof!Io
[TmIVQ!B
private int size=0; c24dSNJg,
U>Slc08N
private int[] queue; Qnsi`1mASr
iUN Ib
public int get() { VXwU?_4J.
return queue[1]; #"G]ke1l$
} ,0!}7;j_c
{N+$Q'
public void remove() { GB=X5<;
SortUtil.swap(queue,1,size--); #AJM6* G9
fixDown(1); $|@ (
} gDpVeBd[
file://fixdown 1ukTA@Rj&
private void fixDown(int k) { EFM5,gB.m
int j; YpVD2.jy
while ((j = k << 1) <= size) { T{-CkHf9Q
if (j < size %26amp;%26amp; queue[j] j++; ~UP[A'9jJ
if (queue[k]>queue[j]) file://不用交换 yd d7I&$
break; \XZ/v*d0
SortUtil.swap(queue,j,k); ds<2I,t
k = j; ``hf=`We
} ~x1$h#Cx'
} !2f[}.6+
private void fixUp(int k) { asppRL||
while (k > 1) { 8.O8No:'&
int j = k >> 1; I=`U7Bis"
if (queue[j]>queue[k]) V@g'#={r
break; )6Fok3u
SortUtil.swap(queue,j,k); uxr #QA
k = j; p$]3'jw
} o6.^*%kM'
} :74y!
u0`S5?
} T4Pgbop
W')Yg5T
} VY7[)
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SortUtil： \!.B+7t=I
UM"- nZ>[
package org.rut.util.algorithm; L0TFo_
+nFu|qM}
import org.rut.util.algorithm.support.BubbleSort; +~ P2C6@G
import org.rut.util.algorithm.support.HeapSort; vdc\R?
import org.rut.util.algorithm.support.ImprovedMergeSort; gCB |DY
import org.rut.util.algorithm.support.ImprovedQuickSort; x??+~$}\*-
import org.rut.util.algorithm.support.InsertSort; |ATvS2
import org.rut.util.algorithm.support.MergeSort; -cAo@}v
import org.rut.util.algorithm.support.QuickSort; _@ qjV~%Sy
import org.rut.util.algorithm.support.SelectionSort; 286jI7T
import org.rut.util.algorithm.support.ShellSort; pmyXLT
2K/4Rf0;
/** L [pBB
* @author treeroot 4V)kx[j
* @since 2006-2-2 TNe l/
* @version 1.0 KJ)k =mJ
*/ 8V`WO6*
public class SortUtil { EE06h-ns
public final static int INSERT = 1; &5B'nk"
public final static int BUBBLE = 2; vXrx{5gz
public final static int SELECTION = 3; (c=6yV@
public final static int SHELL = 4; 8Fz#A.%P
public final static int QUICK = 5; z]_wjYn Z
public final static int IMPROVED_QUICK = 6; 3M[!N
public final static int MERGE = 7; ZbW17@b
public final static int IMPROVED_MERGE = 8; Y!w`YYKP
public final static int HEAP = 9; wd8l$*F*
*&^Pj%DX
public static void sort(int[] data) { /NI;P]s.
sort(data, IMPROVED_QUICK); y.mda:$~=
} Z&+ g;(g
private static String[] name={ ctZ uA+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" FrGgga$
}; m$>H u@Va
FXG]LoP
private static Sort[] impl=new Sort[]{ "c%0P"u
new InsertSort(), FrfM3x6UM
new BubbleSort(), gwuI-d^
new SelectionSort(), d;Ym=YHJtn
new ShellSort(), 823Y\x~>
new QuickSort(), Q4#m\KK;i9
new ImprovedQuickSort(), _{YWXRC#
new MergeSort(), /K@XzwM
new ImprovedMergeSort(), M=@:ZQ^!
new HeapSort() &N^9JxN?8
}; aFX=C>M
UNu#(nP
public static String toString(int algorithm){ dVtG/0
return name[algorithm-1]; pZ.ecZe/
} NvceYKp:
JE"x
public static void sort(int[] data, int algorithm) { e5ZX
impl[algorithm-1].sort(data); 24 'J
} [.7d<oY
xX&+WR
public static interface Sort { %HhnSi1K
public void sort(int[] data); [Gb. JO}X
} \h/H#jZJ
]vUwG--*
public static void swap(int[] data, int i, int j) { y@S$^jk.
int temp = data; 3)<yod=
data = data[j]; A4x]Qh3OO
data[j] = temp; t%0VJB,Q2
} yW=::=
} y&$A+peJ1