[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; HP3lz,d
} w6W}"Uw
int i1=l; 7U2J xE
int i2=mid+1; Ooq! 0g
for(int cur=l;cur<=r;cur++){ v4.#;F.\m
if(i1==mid+1) oWC@w
data[cur]=temp[i2++]; D(H>R&b!
else if(i2>r) &qr;IL7'
data[cur]=temp[i1++]; ML8<4o
else if(temp[i1] data[cur]=temp[i1++]; H s"HID
else )>`G
data[cur]=temp[i2++]; }0X:F`Y-
} "t_-f7fS7
} U2wbvXr5-
L"j tf78
} < !dqTJos
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改进后的归并排序: %^>ju;i^O
!Y\D?rKZ
package org.rut.util.algorithm.support; @p NNq
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import org.rut.util.algorithm.SortUtil; 371 TvZ4
pFHz"]
/** 9uBM<
* @author treeroot t[oT-r
* @since 2006-2-2 ZObhF#Y9
* @version 1.0 t{WzKy
*/ OPx`u
public class ImprovedMergeSort implements SortUtil.Sort { iIq)~e/ Z
vc+ARgvH+
private static final int THRESHOLD = 10; 8qEVOZjV&
Ts ^"xlK
/* qh2ON>e;
* (non-Javadoc) \u>"s
* ^n"OL*ipG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bxfc}vC.
*/ ;Mpy#yIU.
public void sort(int[] data) { $W9{P;
int[] temp=new int[data.length]; $[/&74#0HX
mergeSort(data,temp,0,data.length-1); !/3B3cG
} !cAyTl(_
j.L-{6_s>~
private void mergeSort(int[] data, int[] temp, int l, int r) { Ffv`kn@
int i, j, k; !H irhDN
int mid = (l + r) / 2; 0 rXxRQ
if (l == r) }c}| $h^Y
return; [h34d5'w
if ((mid - l) >= THRESHOLD) Ie`13 L2
mergeSort(data, temp, l, mid); QZ:8+[oy
else r.>].~}4
insertSort(data, l, mid - l + 1); TT4./R:
if ((r - mid) > THRESHOLD) 'b#0t#|TM
mergeSort(data, temp, mid + 1, r); %JHGiCv|
else R%qGPO5Z\c
insertSort(data, mid + 1, r - mid); d\61;C
},>pDeX^P
for (i = l; i <= mid; i++) { N%"Y
temp = data; }`v~I4i
} fbL\?S,w
for (j = 1; j <= r - mid; j++) { `^FGwx@
temp[r - j + 1] = data[j + mid]; (jFGa2{
} YH%'t= <m
int a = temp[l]; D[mSmpjE6&
int b = temp[r]; OVko+X`
for (i = l, j = r, k = l; k <= r; k++) { 8rMX9qTO@
if (a < b) { I>[RqG
data[k] = temp[i++]; !2'jrJGc
a = temp; -sjd&)~S[
} else { pm\x~3jHs
data[k] = temp[j--]; -"h;uDz|z
b = temp[j]; :I:!BXQT$
} 4x;/HEb7?
} HaYE9/xS
} 2#<xAR
%d>=+Ds[
/** k-HCeZ
* @param data :)_~w4&
* @param l l*kPOyB
* @param i LX@/RAd vz
*/ '`XX "_k3
private void insertSort(int[] data, int start, int len) { PG_0\'X)/w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9v}G{mQ#
} ;M_o)OS3
} q|v(Edt|_[
} ]"1`+q6i
} I-WhH>9
0em#-*|2"
堆排序： KA){''>8
& M~`:R
package org.rut.util.algorithm.support; LF~*^n>
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import org.rut.util.algorithm.SortUtil; 9f',7i
USVqB\#
/** KTn}w:+B\
* @author treeroot mN>h5G>a
* @since 2006-2-2 ~d%Pnw|
* @version 1.0 FFH_d <q
*/ NDs!a
public class HeapSort implements SortUtil.Sort{ mXUGe:e8
q@@T]V6
/* (non-Javadoc) 6q]5Es<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -GqT7`:(H4
*/ GW$.lo1|)
public void sort(int[] data) { xZQg'IT
MaxHeap h=new MaxHeap(); VA9Gb9
h.init(data); %_(H{y_!
for(int i=0;i h.remove(); m^H21P"z
System.arraycopy(h.queue,1,data,0,data.length); mdq;R*`
} r; xLP
{.De4]ANh
private static class MaxHeap{ CMCO}#
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void init(int[] data){ e?Ho a$k
this.queue=new int[data.length+1]; $zyIuJN#
for(int i=0;i queue[++size]=data; RheRe
fixUp(size); @~#Ym1{W
} ooV3gj4
} rN%F) q#
Ty<L8+B|
private int size=0; h-m\%|D
)*Q-.Je/U
private int[] queue; Nof3F/2 N&
7\9>a
public int get() { {qmdm`V[
return queue[1]; o.'g]Q<}UB
} TP"1\O
{O,{c\
public void remove() { Uv?|G%cD-
SortUtil.swap(queue,1,size--); EloMe~a3
fixDown(1); OzQ -7|m'J
} Wa1, p
file://fixdown dpFVN[\oK
private void fixDown(int k) { ,uPJ_oZs
int j; _^'I
while ((j = k << 1) <= size) { xritonG/F
if (j < size %26amp;%26amp; queue[j] j++; #~=hn8
if (queue[k]>queue[j]) file://不用交换 <]T`3W9
break; gCN$}
SortUtil.swap(queue,j,k); Qed.4R:o
k = j; 4mHvgnT!WA
} GG0R}',0
} hTEx]# (
private void fixUp(int k) { UH"#2< |b
while (k > 1) { -CR?<A4mud
int j = k >> 1; /MF!GM
if (queue[j]>queue[k]) ?qX)ihe%k
break; 9&2Vm;F_
SortUtil.swap(queue,j,k); V~hlq$jn<Y
k = j; PZm:T+5H
} PNA\ TXT
} Y)$ ;Ax-D
#."Hh<C
} 3`#6ACF
(lGaPMEU}
} 6sE{{,OGB
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SortUtil： g(Io/hyj
#!$GH_
package org.rut.util.algorithm; H{AMZyV0/d
PI~1GyJr@;
import org.rut.util.algorithm.support.BubbleSort; d)[;e()
import org.rut.util.algorithm.support.HeapSort; TeWMp6u,r
import org.rut.util.algorithm.support.ImprovedMergeSort; x+h~gckLb
import org.rut.util.algorithm.support.ImprovedQuickSort; 1$2D O
import org.rut.util.algorithm.support.InsertSort; X5]TY]
import org.rut.util.algorithm.support.MergeSort; `$~RxzZ g
import org.rut.util.algorithm.support.QuickSort; Fk6x<^Q<w
import org.rut.util.algorithm.support.SelectionSort; 8UMFq
import org.rut.util.algorithm.support.ShellSort; *5wu
PT^c^{V
/** AxZD-|.
* @author treeroot @_"9Dy Y%
* @since 2006-2-2 Zo}y(N1K}
* @version 1.0 rx5B=M
*/ xy<`#
public class SortUtil { 90# ;?#
public final static int INSERT = 1; dDD<E?TjD
public final static int BUBBLE = 2; #9m$ N
public final static int SELECTION = 3; 3GmeD/6
public final static int SHELL = 4; %',F
public final static int QUICK = 5; qA:#iJ8w
public final static int IMPROVED_QUICK = 6; )$&dg2[
public final static int MERGE = 7; if)Y9:{r^
public final static int IMPROVED_MERGE = 8; k`{@pt.
public final static int HEAP = 9; yCXrVN:`,
X/;p-KX
public static void sort(int[] data) { 6AP~]e 8
sort(data, IMPROVED_QUICK); =B];?%
} ?hR7<02
private static String[] name={ 3-%Cw2ds
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P1U*g!
}; Pe_!?:vF
>?]_<:
private static Sort[] impl=new Sort[]{ y?)}8T^
new InsertSort(), Jj=;
new BubbleSort(), WA$>pG5s
new SelectionSort(), `Rdm-[&
new ShellSort(), CAU0)=M
new QuickSort(), a|BcnYN
new ImprovedQuickSort(), $x#FgD(iI
new MergeSort(), D&ve15wL
new ImprovedMergeSort(), /oL;YIoQX
new HeapSort() x-'~Bu
}; XG@`ZJhU6
J@L9p46,
public static String toString(int algorithm){ S|zW^|YU
return name[algorithm-1]; Z Dhx5SL&
} ;+I/I9~
<N(oDaU
public static void sort(int[] data, int algorithm) { axk"^gps
impl[algorithm-1].sort(data); s 1ge0~p3
} aP&D9%5
}6-ZE9H-v
public static interface Sort { ow/57P
public void sort(int[] data); XYH|;P6K
} hAqg Iu*
>|o_wO
public static void swap(int[] data, int i, int j) { QJW`}`R
int temp = data; M|[ZpM+
data = data[j]; W><dYy=z5
data[j] = temp; +-a&2J;J'
} ,SScf98,j
} u=&Bmn_