[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; jXa;ovPK
} xIOYwVC
int i1=l; WruSL|4iH
int i2=mid+1; j ^Tb=
for(int cur=l;cur<=r;cur++){ wSy|h*a,
if(i1==mid+1) _wp>AJ r
data[cur]=temp[i2++]; 3shRrCL0mf
else if(i2>r) }s9eRmJs
data[cur]=temp[i1++]; [h5~1N
else if(temp[i1] data[cur]=temp[i1++]; |M8FMH[_
else bD2):U*Fzo
data[cur]=temp[i2++]; =nVEdRU
} 8fI]QW
} aXv[~
VVd9VGvh
} JWh5gOXd
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改进后的归并排序: QL].)Vgf
n]3Lqe;
package org.rut.util.algorithm.support; i%FpPni
=&_Y=>rA]0
import org.rut.util.algorithm.SortUtil; #F|q->2`o
0Z.X;1=
/** l:@`.'-=
* @author treeroot !#NGGIp;
* @since 2006-2-2 xYLTz8g=
* @version 1.0 -XJXl}M.
*/ e) \PW1b
public class ImprovedMergeSort implements SortUtil.Sort { &06pUp iS
IPVD^a?
private static final int THRESHOLD = 10; ln1QY"g
8wf[*6VwV
/* -X]?ql*%`
* (non-Javadoc) |//D|-2
* 7hzd.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J<9;Ix8R
*/ /bSAVSKR
public void sort(int[] data) { 'NAC4to;;
int[] temp=new int[data.length]; "<N2TDF5
mergeSort(data,temp,0,data.length-1); ML!>tCT
} -d*zgP
sZDxTP+
private void mergeSort(int[] data, int[] temp, int l, int r) { n:8<Ijrh
int i, j, k; )c<X.4
int mid = (l + r) / 2; eZ G#op
if (l == r) Puq
return; ]aZ3_<b
if ((mid - l) >= THRESHOLD) 8XG|K`'u
mergeSort(data, temp, l, mid); Ivx]DXR|
else WJ&a9]&C
insertSort(data, l, mid - l + 1); 4(D1/8
if ((r - mid) > THRESHOLD) lzbAx
mergeSort(data, temp, mid + 1, r); c}G\F$
else Qn!KL0w
insertSort(data, mid + 1, r - mid); 0s72BcP
(7 O?NS
for (i = l; i <= mid; i++) { eJy}W /
temp = data; PNB E
} &~&oB;uR
for (j = 1; j <= r - mid; j++) { &Cm$%3
temp[r - j + 1] = data[j + mid]; h|{DIG3
} \Gm\sy
int a = temp[l]; laQ{nSVBm
int b = temp[r]; ec&K}+p@
for (i = l, j = r, k = l; k <= r; k++) { .FeVbZW
if (a < b) { #/ HQ?3h]
data[k] = temp[i++]; =`OnFdI
a = temp; gkFw=Cd
} else { *cy!PF&
data[k] = temp[j--]; '&!:5R59
b = temp[j]; )ZMR4U$+v
} aXgngwq
} a^7HI,
} zrL+:/t
7srq~;j3
/** q+U&lw|"w
* @param data V)Ze>Pp
* @param l Lk]W?
* @param i Nz%Yi?AF
*/ =Bos>;dl
private void insertSort(int[] data, int start, int len) { 9P&{Xhs7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :NynNu'
} M-/2{F[
} Y-.aSc53
} ziXI$B4-
} UgTgva>?
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堆排序： _BI[F m
fbW<c`LH
package org.rut.util.algorithm.support; "J{A}g[
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import org.rut.util.algorithm.SortUtil; yJ*g ;
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/** FVWHiwRU,
* @author treeroot 42=/$V
* @since 2006-2-2 qHu\3@px
* @version 1.0 'DD~xCXE
*/ E&;;2
public class HeapSort implements SortUtil.Sort{ y]}N[l
vRLWs`1j
/* (non-Javadoc) ;v5Jps2^]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dZ x
*/ XblZlWP#
public void sort(int[] data) { 'H(khS
MaxHeap h=new MaxHeap(); +@dgHDJ
h.init(data); `8kL=%(h
for(int i=0;i h.remove(); >AW&Lfw$
System.arraycopy(h.queue,1,data,0,data.length); +8.1cDEH\
} I+rLKGZC
%=)%$n3=-M
private static class MaxHeap{ ?ajVf./Ja
GpCjoNcW{
void init(int[] data){ 0Vj!'=Ntv
this.queue=new int[data.length+1]; *0z'!m12
for(int i=0;i queue[++size]=data; ZOy^TR
fixUp(size); }CvhLjo
} ^TT_BAI
} BOme`0A
ztC>*SX
private int size=0; :Fi$-g
GriFb]ml"
private int[] queue; gp4@6HuUd
P9M. J^<
public int get() { Nuaq{cl
return queue[1]; '~E=V:6
} ZdlQ}l#F
q{pa _
public void remove() { :`Xg0J+P
SortUtil.swap(queue,1,size--); Xj$'i/=-+c
fixDown(1); Q1P=A:*]9
} i}v3MO\X
file://fixdown R/kF,}^F
private void fixDown(int k) { \Z_29L w=
int j; d?A!0;(*
while ((j = k << 1) <= size) { MLN+ BuS
if (j < size %26amp;%26amp; queue[j] j++; a7"Aq:IjU
if (queue[k]>queue[j]) file://不用交换 Zn6u6<O=
break; c>BDw<
SortUtil.swap(queue,j,k); MGsY3~!K
k = j; >~})O&t
} Tb!jIe
} 40%<E
private void fixUp(int k) { s/Q8(sF5
while (k > 1) { NZZc[P
int j = k >> 1; ->2m/d4a
if (queue[j]>queue[k]) jAfqC@e
break; [BFPIVD)h]
SortUtil.swap(queue,j,k); {11xjvAD
k = j; , nW)A/?}
} SEIJ+u9XsA
} eDsc_5I
V:2{LR<R8
} -GYJ)f
0}WDB_L
} I.kuYD62
b ; U
SortUtil： H.&"~eH
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package org.rut.util.algorithm; oq2-)F2/
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import org.rut.util.algorithm.support.BubbleSort; nRcy`A%
import org.rut.util.algorithm.support.HeapSort; 5QZ}KNJ|t~
import org.rut.util.algorithm.support.ImprovedMergeSort; x2tcr+o
import org.rut.util.algorithm.support.ImprovedQuickSort; :\~YbA
import org.rut.util.algorithm.support.InsertSort; 8BX9JoDi
import org.rut.util.algorithm.support.MergeSort; 2j=HxE
import org.rut.util.algorithm.support.QuickSort; @Wa,
import org.rut.util.algorithm.support.SelectionSort; 8p PQ
import org.rut.util.algorithm.support.ShellSort; h=dFSK?*D
rtz ]PH
/** 8@7leAq!
* @author treeroot 83_vo0@<6
* @since 2006-2-2 C9n*?Mk:
* @version 1.0 TsY nsLQY
*/ EOo,olklC
public class SortUtil { oT"7O5v
public final static int INSERT = 1; DUb8 HgcV}
public final static int BUBBLE = 2; o>A']+`Eu
public final static int SELECTION = 3; 1Sd<cOEd
public final static int SHELL = 4; m3=Cg$n
public final static int QUICK = 5; Ys8D|HIk
public final static int IMPROVED_QUICK = 6; .qrS[ w
public final static int MERGE = 7; C#P7@JE
public final static int IMPROVED_MERGE = 8; 4tz@?TCb
public final static int HEAP = 9; Fz2CXC
r:H.VAD
public static void sort(int[] data) { (1)b> 6
sort(data, IMPROVED_QUICK); lF~!F<^9
} S0?e/VWy
private static String[] name={ \ \gAa-}:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -d^c!Iu|
}; p$a+?5'Q
lf_q6y
private static Sort[] impl=new Sort[]{ 7$Lt5rn"}
new InsertSort(), fk\hrVP
new BubbleSort(), *kt%.wPJ
new SelectionSort(), ]~4*ak=)5\
new ShellSort(), Tfw5i,{
new QuickSort(), 76b2 3|
new ImprovedQuickSort(), bpdluWS+)
new MergeSort(), rN`-ak
new ImprovedMergeSort(), e5m]mzF@
new HeapSort() Dw.Pv)'$
}; \!wo<UX%
iwI}
public static String toString(int algorithm){ oo]g=C$n
return name[algorithm-1]; %S<))G
} lhB;jE
+ De-U.
public static void sort(int[] data, int algorithm) { 1l\.>H\E
impl[algorithm-1].sort(data); TmEh$M
} 7x.] 9J
`Db%:l^e
public static interface Sort { 8" (j_~;
public void sort(int[] data); [9\Mf4lh#
} %9_jF"
W/u_<\
public static void swap(int[] data, int i, int j) { E+~1GKd
int temp = data; )5w#n1
data = data[j]; wc?YzXP+
data[j] = temp; U%KsD 4B
} YZz8xtM<2
} `2n%Lo?_