[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; _qq> 43
} CHeU?NtFps
int i1=l; 0GtL6M@pP
int i2=mid+1; ^}+qd1r
for(int cur=l;cur<=r;cur++){ ZPieL&uV`
if(i1==mid+1) zF9SZ#{a
data[cur]=temp[i2++]; 4'ym vR
else if(i2>r) RpAqnDX)
data[cur]=temp[i1++]; L|wD2iw
else if(temp[i1] data[cur]=temp[i1++]; l$PSID
else sO,%Ok1
data[cur]=temp[i2++]; >VQP,J{
} 3++}4%w
} R aVOZ=^-
"%o,P/<X
} :ub 4p4h*
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改进后的归并排序: 7*9a`p3w
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package org.rut.util.algorithm.support; KxZO.>,
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import org.rut.util.algorithm.SortUtil; 8 z) K
~$GRgOn
/** PJq;OM|
* @author treeroot b) k\?'j
* @since 2006-2-2 0h[pw
* @version 1.0 p(jY2&g
*/ /k$h2,O"*
public class ImprovedMergeSort implements SortUtil.Sort { M.|cl#
,f4VV\
private static final int THRESHOLD = 10; |Va*=@&6J
U7)#9qS4
/* gn2*'_V~3
* (non-Javadoc) $2p=vi3
* otA59 ;Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -YXNB[C
*/ Gb=pQ(n4
public void sort(int[] data) { KT3W>/#E
int[] temp=new int[data.length]; gRnn}LL^
mergeSort(data,temp,0,data.length-1); *>lh2sslL
} \~sc6ho
O%g Q
private void mergeSort(int[] data, int[] temp, int l, int r) { {:D8@jb[
int i, j, k; |[)k5nUQ|
int mid = (l + r) / 2; 7#~v<M6
if (l == r) V`/E$a1&
return; UlG8c~p
if ((mid - l) >= THRESHOLD) =cwQG&as
mergeSort(data, temp, l, mid); qO;.{f
else aC\O'KcH
insertSort(data, l, mid - l + 1); y /$Q5P+o
if ((r - mid) > THRESHOLD) 'qL:7
mergeSort(data, temp, mid + 1, r); /$Qs1*
else {|KFgQ'\
insertSort(data, mid + 1, r - mid); V`c"q.8
e\0vphS6
for (i = l; i <= mid; i++) { DzfgPY_Py
temp = data; YXJreM5
} 6x'F0{U
for (j = 1; j <= r - mid; j++) { <Km ^>9
temp[r - j + 1] = data[j + mid]; ~4 ~c+^PF
} TY."?` [FK
int a = temp[l]; mH1T|UI
int b = temp[r]; N\,[(LbA&
for (i = l, j = r, k = l; k <= r; k++) { :3J0Q
if (a < b) { L701j.7"
data[k] = temp[i++]; 50s1o{xwc
a = temp; v qt#JdPp9
} else { 'n:|D7t
data[k] = temp[j--]; Vu0d\l^$
b = temp[j]; zBQV2.@
} J0ysZ]
} 1zGD~[M
} O$qxo &
jmp0 %:+L
/** j*.K|77WHj
* @param data O'm5k l
* @param l &z;bX-"E
* @param i [P'"|TM[~
*/ yt'P,m
private void insertSort(int[] data, int start, int len) { @ 0'j;")XV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Dias!$g
} lm;Dy*|<
} {Jna' eS
} ~+A(zlYr~
} -wh?9?W
h SeXxSb:
堆排序： ?*zDsQ
l&/V4V-
package org.rut.util.algorithm.support; K2XRKoG
:17Pc\:DS
import org.rut.util.algorithm.SortUtil; ~WjK'N4n5
X[ 6#J
/** 5}3#l/
* @author treeroot P<%}!Y
* @since 2006-2-2 9{GEq@`7
* @version 1.0 |erG cKk
*/ F@tfbDO?
public class HeapSort implements SortUtil.Sort{ )+ V)]dS@%
Ud_7>P$a
/* (non-Javadoc) j* ZU}Ss
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yPd6{% w
*/ 8FIk|p|l^
public void sort(int[] data) { 0H+!v
MaxHeap h=new MaxHeap(); :#VdFMC<
h.init(data); >T#" Im-
for(int i=0;i h.remove(); !X[P)/?b0+
System.arraycopy(h.queue,1,data,0,data.length); ,Y4>$:#n/
} UhKd o
T,oZaJ<
private static class MaxHeap{ *mJ\Tzc)
64L;np>
void init(int[] data){ f<{f/lU@
this.queue=new int[data.length+1]; 2oF1do;
for(int i=0;i queue[++size]=data; U2Tw_
fixUp(size); ^OOoo2
} 3&!v"ms
} Eq?U$eE
I/*^s
private int size=0; SHYbQF2
LVNA`|>
private int[] queue; nWes,K6T
iYf)FPET
public int get() { '~9w<dSB!r
return queue[1]; `Frr?.3&-
} +lXIv
TVM19)9
public void remove() { .0rTk$B
SortUtil.swap(queue,1,size--); 0j!xv(1
fixDown(1); A"O\u=!
} p/qu4[Mm
file://fixdown Zq~Rkx
private void fixDown(int k) { 95E#
int j; jqj4(J@%yr
while ((j = k << 1) <= size) { ' GUCXx
if (j < size %26amp;%26amp; queue[j] j++; :Xs4C%H;
if (queue[k]>queue[j]) file://不用交换 4wN5x[vp
break; AtUtE#K
SortUtil.swap(queue,j,k); m5o$Dus+?'
k = j; i-ww@XOQ
} (HXKa][T
} .Y0O.
private void fixUp(int k) { r8tW)"?
while (k > 1) { 4TTrHs
int j = k >> 1; +c8t~2tuN
if (queue[j]>queue[k]) P}^Y"zF2
break; XtQwLH+F
SortUtil.swap(queue,j,k); "D'rsEh
k = j; ~.4y* &
} &lgzNC9g%
} }U(bMo@;
*b_Iby-ZD
} }4T`)
W'~s
} D59q/@
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SortUtil： ZWni5uF-c
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package org.rut.util.algorithm; l^^Z}3^Rk
;.Ld6JRunw
import org.rut.util.algorithm.support.BubbleSort; I4|"Ztw
import org.rut.util.algorithm.support.HeapSort; .^2.h
import org.rut.util.algorithm.support.ImprovedMergeSort; ZXN`8!]&
import org.rut.util.algorithm.support.ImprovedQuickSort; !Eg2#a?
import org.rut.util.algorithm.support.InsertSort; 052Cf dq
import org.rut.util.algorithm.support.MergeSort; ~ MsHV%
import org.rut.util.algorithm.support.QuickSort; !RPE-S
import org.rut.util.algorithm.support.SelectionSort; F!phTu
import org.rut.util.algorithm.support.ShellSort; j sD]v)LB
C=(Q0-+L|
/** (?g+.]Dt,
* @author treeroot 4x<H=CJC
* @since 2006-2-2 teI?.M9r
* @version 1.0 xC9{hXg!
*/ +!W:gA
public class SortUtil { Wx8:GBM$2
public final static int INSERT = 1; F3K<-JK+
public final static int BUBBLE = 2; `zrg?
public final static int SELECTION = 3; aOw#]pB|
public final static int SHELL = 4; Cn{v\Q~.4
public final static int QUICK = 5; ?0M$p
public final static int IMPROVED_QUICK = 6; }30Sb&"
public final static int MERGE = 7; +0)M1!gK
public final static int IMPROVED_MERGE = 8; 9Zj3"v+b
public final static int HEAP = 9; }& W=
5]up%.
public static void sort(int[] data) { 4Y}Nu
sort(data, IMPROVED_QUICK); IdMwpru(
} xY/F)JOeG
private static String[] name={ :iLRCK3C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *];QPi~
}; ,(Ol]W}
pg!MtuC}
private static Sort[] impl=new Sort[]{ |x.^rx`
new InsertSort(), B=;kC#Emtf
new BubbleSort(), Dkb`_HI
new SelectionSort(), kYWnaY ^F
new ShellSort(), zc=G4F01
new QuickSort(), {]cr.y]\
new ImprovedQuickSort(), C7G,M
new MergeSort(), OF={k[
new ImprovedMergeSort(), M 87CP=yc
new HeapSort() ?hGE[.(eh]
}; \q*-9_M
@"BhKUoV$K
public static String toString(int algorithm){ X(eW+,H
return name[algorithm-1]; S[2?,C<2=
} ~Kt1%&3{a?
/V{UTMSz
public static void sort(int[] data, int algorithm) { >e& L"
impl[algorithm-1].sort(data); 71%$&6
} :.-z!
vK@UK"m
public static interface Sort { NiWAJ]Z
public void sort(int[] data); i}zz!dJTE
} Tg"? TZO~
@MVul_@6
public static void swap(int[] data, int i, int j) { N&p0Emg
int temp = data; (&Jo. <
data = data[j]; (CRx'R
data[j] = temp; Bm,Vu 1]t
} $OdBuJA
} 'tw ]jMD