[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; !7n`-#)
} 6B!v;93U
int i1=l; &R,QJ4L
int i2=mid+1; 6$&%z Eh
for(int cur=l;cur<=r;cur++){ V$g!#V
if(i1==mid+1) OV/ &'rC
data[cur]=temp[i2++]; H+5S )r
else if(i2>r) 4O7 {a
data[cur]=temp[i1++]; YM&i
else if(temp[i1] data[cur]=temp[i1++]; f>[{1M]n\
else ddwokXx (
data[cur]=temp[i2++]; Lt_A&
} (g3DI*Z
} Ge ?Q)N
+ctJV>
} w,-4A o2x
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改进后的归并排序: qZ%0p*P#_
yJ*g ;
package org.rut.util.algorithm.support; ,!QtViA7
xm0(U0 >
import org.rut.util.algorithm.SortUtil; ~Z}DN*S
I_is3y0
/** q"u,r6ED
* @author treeroot 7`SrqI&
* @since 2006-2-2 qHu\3@px
* @version 1.0 g4Nl"s*~
*/ T:3}W0s,
public class ImprovedMergeSort implements SortUtil.Sort { ;{1 ws
%(B6eiA
private static final int THRESHOLD = 10; h$#|s/
(s,u9vj=>L
/* vRLWs`1j
* (non-Javadoc) 5s:g(gy3BR
* -Yg?@yt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =kb/4eRg
*/ BFQ`Ab+
public void sort(int[] data) { =%d.wH?dZ/
int[] temp=new int[data.length]; 9>/:c\q+
mergeSort(data,temp,0,data.length-1); FKy2C:R(]
} Vo%DoZg
NY/-9W5T4
private void mergeSort(int[] data, int[] temp, int l, int r) { NBD1k;
int i, j, k; p7Z/%~0v:
int mid = (l + r) / 2; >AW&Lfw$
if (l == r) z{nd4qOsD
return; 11B8 LX
if ((mid - l) >= THRESHOLD) g^))
mergeSort(data, temp, l, mid); `V{'GF&[
else /%AA\`:6
insertSort(data, l, mid - l + 1); "QmlW2ysi
if ((r - mid) > THRESHOLD) f@ .s(i=z
mergeSort(data, temp, mid + 1, r); =D Tbz3<
else &%4A3.qE
insertSort(data, mid + 1, r - mid); 2+|U!X
x{3q'2
for (i = l; i <= mid; i++) { hw1J <Pl*
temp = data; l%#z
} ZOy^TR
for (j = 1; j <= r - mid; j++) { G|j8iV O
temp[r - j + 1] = data[j + mid]; %[OZ;q& X
} `!C5"i8+i2
int a = temp[l]; PoZxT-U
int b = temp[r]; FSb4RuD9
for (i = l, j = r, k = l; k <= r; k++) { 6SEq 2
if (a < b) { !H(V%B%
data[k] = temp[i++]; $*C'{&2
a = temp; yc0_7Im?
} else { WQv`%%G2>
data[k] = temp[j--]; rSKZc`<^
b = temp[j]; Muok">#3.
} f\~A72-
} P9M. J^<
} l@g%A# _
C~"b-T
/** Jp(CBCG{F
* @param data |3Bmsd/3
* @param l ZdlQ}l#F
* @param i C;m*0#9D
*/ ]~9YRVeC
private void insertSort(int[] data, int start, int len) { S5e"}.]|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \vgM`32<
} [E0.4FLT!
} w\ddC DZ
} R/kF,}^F
} *mkL>v &
gaR~K
堆排序： y)b=7sU
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package org.rut.util.algorithm.support; z0?IQzR^T
zE?@_p1gei
import org.rut.util.algorithm.SortUtil; 9lB$i2G>Zw
;]_h")4"c
/** U4h5K}j4
* @author treeroot %(>,eee_
* @since 2006-2-2 [#;CBs5o
* @version 1.0 S&NWZ:E3[
*/ &e99P{\D
public class HeapSort implements SortUtil.Sort{ !rff/0/x"
40%<E
/* (non-Javadoc) c.}#.-b8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xn%O .yM6
*/ "X\6tl7a|
public void sort(int[] data) { H4uHCkj
MaxHeap h=new MaxHeap(); fy={
h.init(data); FBS]U$1
for(int i=0;i h.remove(); 9/dADJe0b
System.arraycopy(h.queue,1,data,0,data.length); e,T^8_>
} qD{~QHDa
_c,{}sn
private static class MaxHeap{ RAFdo
c1Hp
void init(int[] data){ 2!GyQ@&[W
this.queue=new int[data.length+1]; /#!1
for(int i=0;i queue[++size]=data; uuYeXI;
fixUp(size); i)7B :uA
} #dkSAS
} m=V69 a#
d bHxc@H
private int size=0; L4v26*P
J6Nhpzp
private int[] queue; &[_D'jm+S0
&p5^Cjy L
public int get() { w6|l ~.$=
return queue[1]; Jn"ya^~
} ^IO\J{U{"x
EC7)M}H
public void remove() { }B&+KO)
SortUtil.swap(queue,1,size--); D(#6H~QN%
fixDown(1); VUzRA"DP|
} \2M{R
file://fixdown N$M:&m3^
private void fixDown(int k) { nT=XWM
int j; rtz ]PH
while ((j = k << 1) <= size) { 8@7leAq!
if (j < size %26amp;%26amp; queue[j] j++; 83_vo0@<6
if (queue[k]>queue[j]) file://不用交换 C9n*?Mk:
break; TsY nsLQY
SortUtil.swap(queue,j,k); YB376/
k = j; LKYcE;n
} L@`:mK+;
} z4JhLef%
private void fixUp(int k) { qEfg-`*M
while (k > 1) { {}"a_L&[;
int j = k >> 1; hQaa"U7[
if (queue[j]>queue[k]) /g$8JL
break; ;nKhmcQ4
SortUtil.swap(queue,j,k); eHUb4,%P
k = j; 0Z jE(3i
} H6<3'P
} u^( s0q
WP !u3\91
} r:H.VAD
(1)b> 6
} lF~!F<^9
R/l/GNm
SortUtil： #BX}j&h_
Vsd4;
package org.rut.util.algorithm; B* k|NZj
34 I Cn~
import org.rut.util.algorithm.support.BubbleSort; $'COsiK7
import org.rut.util.algorithm.support.HeapSort; )p[Qj58
import org.rut.util.algorithm.support.ImprovedMergeSort; n7hjYNJ
import org.rut.util.algorithm.support.ImprovedQuickSort; LrdX^_,nt
import org.rut.util.algorithm.support.InsertSort; 5Vlm?mPU
import org.rut.util.algorithm.support.MergeSort; L | #"Yn
import org.rut.util.algorithm.support.QuickSort; _C@<*L=Q
import org.rut.util.algorithm.support.SelectionSort; 90gKGyxF
import org.rut.util.algorithm.support.ShellSort; X 1}U
wexa\o
/** LknV47vd
* @author treeroot eOJ_L]y-
* @since 2006-2-2 `bW0Va N
* @version 1.0 )|KZGr
*/ <"nF`'olV
public class SortUtil { (>`S{L C>s
public final static int INSERT = 1; ]s`cn}d
public final static int BUBBLE = 2; LXm@h
public final static int SELECTION = 3; /l;_ xs
public final static int SHELL = 4; 1l\.>H\E
public final static int QUICK = 5; 0iVeM!bM
public final static int IMPROVED_QUICK = 6; D:PrFa
public final static int MERGE = 7; 6k;>:[p
public final static int IMPROVED_MERGE = 8; '%*/iH6<U{
public final static int HEAP = 9; /~P4<1
=Q4Wr0y><]
public static void sort(int[] data) { 6<No_x |_
sort(data, IMPROVED_QUICK); 5E}!TL$
} 6yXN7L==x
private static String[] name={ ##'uekSJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J/\^3rCB
}; ,AG k4]
T 2Gscey
private static Sort[] impl=new Sort[]{ pXK-,7-
new InsertSort(), (} Y|^uM,
new BubbleSort(), ,<U
new SelectionSort(), U[NQ"
new ShellSort(), __[bKd.
new QuickSort(), ;ApldoMi
new ImprovedQuickSort(), % E8s>D
new MergeSort(), V@\A<q%jTs
new ImprovedMergeSort(), e%^PVi
new HeapSort() Pl&x6\zL
}; dl+:u}9M$
6nW]Q^N}
public static String toString(int algorithm){ ltOsl-OpR
return name[algorithm-1]; *yN#q>1
} D9\ EkX
}a!c
public static void sort(int[] data, int algorithm) { hlFvm$P`M
impl[algorithm-1].sort(data); 2E@g#:3
} ;qaNIOo9
J['i
public static interface Sort { Xe@:Aun
public void sort(int[] data); N`+@_.iBX
} $mn+
%APeQy"6#^
public static void swap(int[] data, int i, int j) { o= &/;X
int temp = data; iy [W:<c7j
data = data[j]; qjf9ZD&
data[j] = temp; gFr-P!3
} (4C_Ft*~j
} bkIQ?cl<at