[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; wauM|/KG
} D|2lBU
int i1=l; "$3~):o
int i2=mid+1; B}@CtVWFz
for(int cur=l;cur<=r;cur++){ Lie= DD
if(i1==mid+1) x=N0H
data[cur]=temp[i2++]; TpYdIt9#>
else if(i2>r) T#KVN{O
data[cur]=temp[i1++]; 59(kk;
else if(temp[i1] data[cur]=temp[i1++]; QS@eqN
else 4 g8t
data[cur]=temp[i2++]; 8\+XtS
} <.ZD.u
} \SBAk h
vvLzUxV
} `ghNS
\Hu?K\SWs
改进后的归并排序: bV:MOj^
}vZTiuzC
package org.rut.util.algorithm.support; KDr)'gl&
16"L;r
import org.rut.util.algorithm.SortUtil; k;<F33v;Mh
xv7nChB
/** XvZ5Q
* @author treeroot wsj5;(f+
* @since 2006-2-2 )o;n2T#O
* @version 1.0 F<O<=Ww
*/ =%{E^z>1
public class ImprovedMergeSort implements SortUtil.Sort { LAGg(:3f3
b~?3HY:t~K
private static final int THRESHOLD = 10; w ; PV &M
AQPzId*z
/* 6Z-[-0o+g
* (non-Javadoc) ~2UmX'
* }7i}dyQv}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k~]\kv=
*/ w69G6G(
public void sort(int[] data) { [bEm D
int[] temp=new int[data.length]; 0C717
mergeSort(data,temp,0,data.length-1); n*hRlL
} MNX-D0`g
(`d_DQ
private void mergeSort(int[] data, int[] temp, int l, int r) { ah!fQLMH
int i, j, k; qX]ej2
int mid = (l + r) / 2; _<jccQ
if (l == r) Mvk#$:8e
return; *jl_,0g]
if ((mid - l) >= THRESHOLD) !^3j9<|@'
mergeSort(data, temp, l, mid); Y|<1|wGG
else /?C6oj1
insertSort(data, l, mid - l + 1); ~{D:vj4>
if ((r - mid) > THRESHOLD) h)T-7b
mergeSort(data, temp, mid + 1, r); F5<GGEQb
else _p| KaT``
insertSort(data, mid + 1, r - mid); gWy2E;"a
[jF\"#A
for (i = l; i <= mid; i++) { $I a-go2W
temp = data; ^Y^5 @x=
} NmV][0(BS
for (j = 1; j <= r - mid; j++) { 9|hPl-. .W
temp[r - j + 1] = data[j + mid]; ]2xoeNF/W{
} {N0ky=ud
int a = temp[l]; cWa>rUsF
int b = temp[r]; gC/-7/}
for (i = l, j = r, k = l; k <= r; k++) { =e]Wt/AQ
if (a < b) { ]K%D$x{+\
data[k] = temp[i++]; Ay\!ohIS3
a = temp; Mp^U)S+
} else { "Oy&6rrr
data[k] = temp[j--]; l5_%Q+E_
b = temp[j]; ]GPUL>7
} Q$2^m(?;
} |)Sx"B)
} tA9(N>[*
+,}CuF
/** >V3pYRA
* @param data 4JjO.H
* @param l i{2rQy+
* @param i ++0xa%:
*/ l7GLN1#m
private void insertSort(int[] data, int start, int len) { ^i~'aq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (9D,Ukw
} 3yIC@>&y(8
} cWL7gv\|
} {%z}CTf#
} hH@pA:`s
bq`0$c%hN
堆排序： h>K%OxR
.e2K\o
package org.rut.util.algorithm.support; Jx= v6==7
h2edA#bub
import org.rut.util.algorithm.SortUtil; o8S)8_3
UjQi9ELoJ
/** f5QJj<@
* @author treeroot #FV`*G
* @since 2006-2-2 ,h$j%->U
* @version 1.0 3mM.#2=@>
*/ atWAhN
public class HeapSort implements SortUtil.Sort{ XWFuAE
w~=@+U$f
/* (non-Javadoc) t2vo;,^euL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ic&Jhw;]z
*/ #-u?+Nk/
public void sort(int[] data) { S#, E)h/
MaxHeap h=new MaxHeap(); f<G:}I
h.init(data); )haHI)xR
for(int i=0;i h.remove(); ~0@+8%^>;
System.arraycopy(h.queue,1,data,0,data.length); T1r^.;I:
} Fh$Xcz~i
^!>o5Y)
private static class MaxHeap{ @uI_4a
})}-K7v1+
void init(int[] data){ WD5ulm?91|
this.queue=new int[data.length+1]; TJp0^&Q
for(int i=0;i queue[++size]=data; !U!}*clYL
fixUp(size); *S4*FH;8
} {pNf&'
} 9}6^5f?|
2*1s(Jro
private int size=0; ~2*8pb 4
gT6@0ANq
private int[] queue; .EUOKPK4W
YG6Kvc6T
public int get() { 0UT2sM$
return queue[1]; y:8*!}fR
} .J3Dk=/
a<K@rgQ
public void remove() { f<0nj?
SortUtil.swap(queue,1,size--); ~8G<Nw4*\
fixDown(1); 7|Tu@0XXA
} o$DJL11E
file://fixdown oLp:Z=
private void fixDown(int k) { _*Z2</5
int j; jVpk) ;vC
while ((j = k << 1) <= size) { !]k$a
if (j < size %26amp;%26amp; queue[j] j++; 3_tO
if (queue[k]>queue[j]) file://不用交换 Kr]`.@/.S
break; 0BTLIV$d;
SortUtil.swap(queue,j,k); 5:H9B
k = j; *xOrt)D=
} GlVD!0
} T9+ ?A l
private void fixUp(int k) { [UHDN:y
while (k > 1) { xFY;aK
int j = k >> 1; =NzA2td
if (queue[j]>queue[k]) m,U`hPJ
break; @"#W\m8
SortUtil.swap(queue,j,k); 6"W~%FSJX
k = j; 43Yav+G(+
} <j.bG 7
} oA&V,r
6Hn3
} !%?X% @9
Oj*3'?<7=
} &` u<KKF6
ToN$x^M w
SortUtil： dZ7+Iw;m
pU*dE
package org.rut.util.algorithm; [EJ[Gg0m
Kj_hCSvf3e
import org.rut.util.algorithm.support.BubbleSort; _azg 0.)
import org.rut.util.algorithm.support.HeapSort; /0mbG!Ac
import org.rut.util.algorithm.support.ImprovedMergeSort; +BRmqJ3
import org.rut.util.algorithm.support.ImprovedQuickSort; HX{O@
import org.rut.util.algorithm.support.InsertSort; >]k'3|vV
import org.rut.util.algorithm.support.MergeSort; YGObTIGJvf
import org.rut.util.algorithm.support.QuickSort; oP".>g-.
import org.rut.util.algorithm.support.SelectionSort; [2!K 6
import org.rut.util.algorithm.support.ShellSort; 2c <Qh=
%jY/jp=R
/** v 6?{g
* @author treeroot !z;a>[T'
* @since 2006-2-2 gC#PqK~
* @version 1.0 xh\{ dUPA
*/ Y$ ;C@I
public class SortUtil { ']+-u{+#
public final static int INSERT = 1; h&Ehp
public final static int BUBBLE = 2; Q-%Q7n'c
public final static int SELECTION = 3; ^Q]*CU+C
public final static int SHELL = 4; s45Y8!c
public final static int QUICK = 5; Yo c N@s
public final static int IMPROVED_QUICK = 6; (@dh"=Lt\
public final static int MERGE = 7; Qcz7IA
public final static int IMPROVED_MERGE = 8; Poacd;*
public final static int HEAP = 9; rs3Uk.Z^'
Dm6}$v'0
public static void sort(int[] data) { tqE LF
sort(data, IMPROVED_QUICK); Dqe/n_Z
} W$0<a@
private static String[] name={ fi%u]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6v0^'}
}; OZ1+`4 v
OedL?4
private static Sort[] impl=new Sort[]{ tH<v1LEZN
new InsertSort(), ZgLO[Bj
new BubbleSort(), dvk?A$
new SelectionSort(), tqIz$84G
new ShellSort(), s&p*.I]@>
new QuickSort(), 0}c*u) ,
new ImprovedQuickSort(), l/_3H\iM
new MergeSort(), Xz0jjO,
new ImprovedMergeSort(), 0CxQ@~ttl
new HeapSort() A?3hNvfx
}; lkV% k1w
y5.Z<Y
public static String toString(int algorithm){ G|yX9C]R
return name[algorithm-1]; Mu18s}
} 3mgFouX2x,
"';'*x
public static void sort(int[] data, int algorithm) { zqqpBwk#
impl[algorithm-1].sort(data); j[yGfDb
} A8hj"V47
sf]y\_zU
public static interface Sort { #"6(Q2| l
public void sort(int[] data); EW1L!3K
} s@f4f__(]
l0g#&V--
public static void swap(int[] data, int i, int j) { rB|D^@mG
int temp = data; 7Rj!vj/
data = data[j]; ,*r"cmz
data[j] = temp; tq?lF$mM:
} |^Z1 D TAw
} L*9^-,