[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; Um+_S@h
} }StzhV{GS
int i1=l; /1EAj
int i2=mid+1; uZ?P{E,K
for(int cur=l;cur<=r;cur++){ "VZ1LVI
if(i1==mid+1) AQZ<,TE0,
data[cur]=temp[i2++]; ^BF}wQb:j
else if(i2>r) SXw r$)4_
data[cur]=temp[i1++]; kgo#JY-4
else if(temp[i1] data[cur]=temp[i1++]; _UVpQ5pN
else `Moo WG
data[cur]=temp[i2++]; JwMRquQv
} 6La[( )
} &%fcGNzJQ
|5vcT,A
} {($bzT7c
z)T-<zWO;
改进后的归并排序: yx8G9SO?
fAJyD`]Z
package org.rut.util.algorithm.support; +Q+O$-a<
XH%pV
import org.rut.util.algorithm.SortUtil; +,spC`M6h
7RT{RE
/** ]~;*9`:
* @author treeroot !l*A3qA
* @since 2006-2-2 Iynks,ikA
* @version 1.0 nWsRauY
*/ A"S"La%"
public class ImprovedMergeSort implements SortUtil.Sort { !`_f
CzV;{[?~;
private static final int THRESHOLD = 10; ^\v]Ltd
8sj2@d
/* z<eu=OD4t
* (non-Javadoc) k*A(7qQA`4
* Y@ v][Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [j@ek
*/ bbjba36RO
public void sort(int[] data) { \>S.nW
int[] temp=new int[data.length]; IX+Jf? &^
mergeSort(data,temp,0,data.length-1); CRo'r/G
} SGl|{+(A
4&NB xe
private void mergeSort(int[] data, int[] temp, int l, int r) { aX.BaK6I
int i, j, k; 9,fV
int mid = (l + r) / 2; 1le9YL1_g
if (l == r) ai;!Q%B#Q
return; I0Do%
if ((mid - l) >= THRESHOLD) TU?n;h#TZ
mergeSort(data, temp, l, mid); OyDoktz$)
else 9-n]_AF`0
insertSort(data, l, mid - l + 1); ~"S5KroN
if ((r - mid) > THRESHOLD) @Xoh@:j\
mergeSort(data, temp, mid + 1, r); AkW,Fp1e
else _,^f,WO~
insertSort(data, mid + 1, r - mid); L^e*_q2d:>
&K]|{1+
for (i = l; i <= mid; i++) { KdR\a&[MA
temp = data; ;7Qem&
} Rb<| <D+
for (j = 1; j <= r - mid; j++) { "a(R>PV%
temp[r - j + 1] = data[j + mid]; f]1 $`
} [vtDtwL
int a = temp[l]; p3fVw]N
int b = temp[r]; gs2qLb
for (i = l, j = r, k = l; k <= r; k++) { NTJ,U2
if (a < b) { \nOV2(FAT
data[k] = temp[i++]; _`Kh8G {e
a = temp; E2 'Al6^C
} else { ?Zv5iI
data[k] = temp[j--]; fx 08>r
b = temp[j]; RGV{KL
} :8n?G
} @lB1t= D
} ?_pd#W=!
fo}@B&=4
/** tc;$7F ;
* @param data IwFf8? 3
* @param l ;$a|4_U$m
* @param i ve#[LBOC8
*/ BvlY\^
private void insertSort(int[] data, int start, int len) { e /XOmv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JmF`5
} #oGvxc7
} UL7%6v{'*
} #tPy0QH
} ~$a%& ]\
ku^2K
堆排序： r~;.8qs
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package org.rut.util.algorithm.support; a(o[ bH.|;
7Ph+Vs+h
import org.rut.util.algorithm.SortUtil; b=Sl`&A
nDC5/xB
/** p|Fhh\,*`X
* @author treeroot 7f=9(Zj
* @since 2006-2-2 A[d'*n[
* @version 1.0 Dc>)js|"
*/ E{9{%J
public class HeapSort implements SortUtil.Sort{ zGFW?|o<
?yz}
/* (non-Javadoc) Df/f&;`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eWx6$_|
*/ .yj=*N.
public void sort(int[] data) { ;lWy?53=@
MaxHeap h=new MaxHeap(); +ACV,GG
h.init(data); *DoEDw
for(int i=0;i h.remove(); El&pux2
System.arraycopy(h.queue,1,data,0,data.length); f{Y|FjPp=E
} u= +
"/XS3sv"s
private static class MaxHeap{ ~KfjT p#
lR^dT4
void init(int[] data){ s_h<
this.queue=new int[data.length+1]; yM D*>8/
for(int i=0;i queue[++size]=data; f&cG;Y
fixUp(size); "AVj]jR
} " Gn; Q-@
} ;%z0iZmg
izWl5}+'B
private int size=0; WE~3(rs#X#
u]MF r2
private int[] queue; !V-SV`+X
s*YFN#Wuc
public int get() { 2RXGY
return queue[1]; gS|xicq!
} 246lFxG.
c`}X2u]k
public void remove() { &{=~)>h
SortUtil.swap(queue,1,size--); -MEz`7c~
fixDown(1); X9gC2iSs]
} IFTW,9hh
file://fixdown CC-:dNb
private void fixDown(int k) { `U1%d7[vY
int j; <d5vVn
while ((j = k << 1) <= size) { \j;uN#)28
if (j < size %26amp;%26amp; queue[j] j++; NU(/Yit
if (queue[k]>queue[j]) file://不用交换 :d2u?+F
break; jRkq^}
SortUtil.swap(queue,j,k); yl ;'Ru:
k = j; omA*XXUx=8
} dGteYt_F
} .-Lqo=o\
private void fixUp(int k) { jgo@~,5R
while (k > 1) { MHYf8HN
int j = k >> 1; mfN@tMp
if (queue[j]>queue[k]) .nH /=
break; nm-Y?!J
SortUtil.swap(queue,j,k); U ^9oc&
k = j; =5M>\vt]
} e,*[5xQ
} ggTjd"|)
^aW[~ c
} WO9/rF_
E\S&} K,s
} Madaxx
T!a[@,)_
SortUtil： Pvw%,=41O
L>b,}w
package org.rut.util.algorithm; !v L:P2
):@%xoF5
import org.rut.util.algorithm.support.BubbleSort; //@=Q!MW
import org.rut.util.algorithm.support.HeapSort; k>CtWV5B
import org.rut.util.algorithm.support.ImprovedMergeSort; vrv*k
import org.rut.util.algorithm.support.ImprovedQuickSort; 1F,_L}=o1s
import org.rut.util.algorithm.support.InsertSort; (FYJ^o
import org.rut.util.algorithm.support.MergeSort; kwR@oVR^
import org.rut.util.algorithm.support.QuickSort; 1W[(+TZ&s
import org.rut.util.algorithm.support.SelectionSort; m_ m@>}ud
import org.rut.util.algorithm.support.ShellSort; ?&m]du#6
l7!)#^`2_
/** Ig KAD#2a
* @author treeroot KgWT&^t
* @since 2006-2-2 PWu2;JF
* @version 1.0 [1^wy#
*/ n^02@Aw
public class SortUtil { lh_zZ!)g
public final static int INSERT = 1; 3]es$Jy
public final static int BUBBLE = 2; kG$8E
public final static int SELECTION = 3; A_~5|
public final static int SHELL = 4; )"uG*}\?b
public final static int QUICK = 5; \q'fB?bS^
public final static int IMPROVED_QUICK = 6; ok2~B._+;
public final static int MERGE = 7; f {Z%:H
public final static int IMPROVED_MERGE = 8; E}9ldM=]s
public final static int HEAP = 9; arKmc@"X
TF-Ty
public static void sort(int[] data) { (x0*(*A}
sort(data, IMPROVED_QUICK); '2$!thm
} B~zg"
private static String[] name={ .{a2z*o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1DtMY|wP
}; {FY[|:Cp
?lN8~Ze
private static Sort[] impl=new Sort[]{ A'QGTT
new InsertSort(), l)*,18n
new BubbleSort(), X/K)kIi
new SelectionSort(), `Uj?PcS_
new ShellSort(), poYAiq_3T
new QuickSort(), \R\@t]>Y
new ImprovedQuickSort(), DE\bYxJ
new MergeSort(), L"!ZY
new ImprovedMergeSort(), )]c3bMVE-
new HeapSort() 'Rd*X6dv
}; _pko]F|()
apD=>O
public static String toString(int algorithm){ pNE\@U|4E
return name[algorithm-1]; :@%-f:iDj
} !_-sTZ
1~5q:X
public static void sort(int[] data, int algorithm) { zB6u-4^wT
impl[algorithm-1].sort(data); ?t0zsq
} t)gi.Ed1"L
v<3o[mq
public static interface Sort { VMZ]n%XRXW
public void sort(int[] data); j H.Ju|nO
} !\#Wk0Ku
d9-mWz(V+
public static void swap(int[] data, int i, int j) { YP#AB]2\}
int temp = data; $rpTs?j*K$
data = data[j]; Zp(=[n5
data[j] = temp; k'ZUBTRq!
} :x""E5H
} 33<fN:J]f