[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; UhSh(E8p>
} 9U=fJrj'u
int i1=l; 5Hwo)S]r
int i2=mid+1; ? %+VG
for(int cur=l;cur<=r;cur++){ Uc&6=5~Ys\
if(i1==mid+1) D,dHP-v
data[cur]=temp[i2++]; :qAc= IC%
else if(i2>r) =l8!VJa
data[cur]=temp[i1++]; _iGU|$a
else if(temp[i1] data[cur]=temp[i1++]; iL0jpa<}
else wAu[pWD'6;
data[cur]=temp[i2++]; xv$)u<Ve
} \U!@OX.R'M
} 6/[Z178m
m+Q5vkW
} fys5-1@-p
%[Zqr;~l
改进后的归并排序: XJmFJafQD
&gA6+b'
package org.rut.util.algorithm.support; 29Z!p2{hk
&R'w-0k_
import org.rut.util.algorithm.SortUtil; ,l$NJt
\7,MZt
/** A-a17}fta
* @author treeroot coF T2Pq
* @since 2006-2-2 :T7?
* @version 1.0 H~[LJ5x
*/ Dh&:-
public class ImprovedMergeSort implements SortUtil.Sort { ,G[r+4|h
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private static final int THRESHOLD = 10; >P\h,1
A,m4WO_q3
/* &0+x2e)7g
* (non-Javadoc) YgfSC}a
* QGH h;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -yC:?
*/ 3tT|9Tb@
public void sort(int[] data) { ?{ B[^
int[] temp=new int[data.length]; TsaW5ho<p
mergeSort(data,temp,0,data.length-1); g>~cs_N@
} |;A9A's
U#;51_
private void mergeSort(int[] data, int[] temp, int l, int r) { HQ^9[HN.
int i, j, k; a[1sA12
int mid = (l + r) / 2; <I7(eh6d
if (l == r) {H=oxa
return; :cc[Jco@w
if ((mid - l) >= THRESHOLD) }rzdm9
mergeSort(data, temp, l, mid); xdd:yrC
else ~~C6)N~1
insertSort(data, l, mid - l + 1); 0).fBBNG
if ((r - mid) > THRESHOLD) X0y?<G1(a
mergeSort(data, temp, mid + 1, r); [3j$ 4rP
else [8F \;
insertSort(data, mid + 1, r - mid); LkJ$aW/
T&1-eq>l
for (i = l; i <= mid; i++) { {q&@nm40
temp = data; @J-plJ4e
} Qm.z@DwFM{
for (j = 1; j <= r - mid; j++) { ;W7hc!
temp[r - j + 1] = data[j + mid]; mi7sBA9L8
} l^k+E-w\
int a = temp[l]; Mjb 1
int b = temp[r]; p`>AnfG
for (i = l, j = r, k = l; k <= r; k++) { 3<c*v/L{C\
if (a < b) { ow2M,KU6Z
data[k] = temp[i++]; 6xQ"bFm
a = temp; sA/,+aM
} else { <9ma(PFa
data[k] = temp[j--]; )K{o<m~WAo
b = temp[j]; ;#3ekl{-g
} \s=QiPK
} Bu7A{DRf
} X_D6eYF
>9-Dd)<
/** 0jBKCu
* @param data \Y*!f|=of
* @param l 9c#lLKrzG
* @param i RK?jtb=&A
*/ xN6?yr
private void insertSort(int[] data, int start, int len) { U?8i'5)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $"Afy)Ir
} fO*)LPen.z
} " Wp
} hIR@^\?
} qh%i5Mu
oG!6}5
堆排序： "?$L'!bM@
6|QTS|!
package org.rut.util.algorithm.support; /sy-;JDnsu
csYy7uzi
import org.rut.util.algorithm.SortUtil; r+o_t2_b*
7g-Dfg.w
/** 4Mk8Cpz
* @author treeroot Y|mW.
* @since 2006-2-2 1{^CfamF
* @version 1.0 [!W5}=^H
*/ R;WW f.#
public class HeapSort implements SortUtil.Sort{ Q-[3j
a;%I\w;2
/* (non-Javadoc) 5)w4)K-%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SGt5~Txj
*/ iBucT"d]
public void sort(int[] data) { 5i6VZv
MaxHeap h=new MaxHeap(); ri:,q/-
h.init(data); _0K.Fk*(!
for(int i=0;i h.remove(); f6Ml[!aU
System.arraycopy(h.queue,1,data,0,data.length); =tq1ogE
} 6VC-KY
6_WmCtvF
private static class MaxHeap{ Z%#^xCz;w>
|7y6 pz
void init(int[] data){ [~COYjp
this.queue=new int[data.length+1]; d [r-k 2
for(int i=0;i queue[++size]=data; J<rlz5':
fixUp(size); :i.t)ES
} m;c3Z-
} 6Z Xu,ks}
x.ba|:5
private int size=0; hqL+_|DW
z?)He)d
private int[] queue; /N>} 4Ay
{#N%Bq}
public int get() { E30Ln_^o
return queue[1]; *,17x`1e
} t ^m~
>Co)2d]
public void remove() { e^zHw^js
SortUtil.swap(queue,1,size--); opXDm\
fixDown(1); "e@n:N!
} 7{4w2)
file://fixdown YGETMIT(
private void fixDown(int k) { Y3k[~A7X
int j; e gI&epN
while ((j = k << 1) <= size) { 19p8B&
if (j < size %26amp;%26amp; queue[j] j++; uxb:^d?D!
if (queue[k]>queue[j]) file://不用交换 "CBRPp
break; #BsW
SortUtil.swap(queue,j,k); P].eAAXnP
k = j; `kFiH*5%z
} r_^)1w
} "Kq>#I'%W
private void fixUp(int k) { FI$XSG
while (k > 1) { grspt}
int j = k >> 1; t{zBC?cR
if (queue[j]>queue[k]) `;$h'eI9
break; ->h5T%sn
SortUtil.swap(queue,j,k); h,t:]
k = j; P3!Atnv2
} q6REh;$
} CcY7$D
NO2(vE
} Vc _:*
6Cv.5Vhx
} IB8gDP2
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SortUtil： &qKigkLd
RU|X*3";T
package org.rut.util.algorithm; i'=2Y9S}
,5{$+
import org.rut.util.algorithm.support.BubbleSort; 'C^;OjAg
import org.rut.util.algorithm.support.HeapSort; %m`zWg-
import org.rut.util.algorithm.support.ImprovedMergeSort; GJ,aRI
import org.rut.util.algorithm.support.ImprovedQuickSort; 'OD)v
import org.rut.util.algorithm.support.InsertSort; h)cY])tGtK
import org.rut.util.algorithm.support.MergeSort; xzr<k Sp
import org.rut.util.algorithm.support.QuickSort; [pL*@9Sa&
import org.rut.util.algorithm.support.SelectionSort; O%&cE*eX
import org.rut.util.algorithm.support.ShellSort; L5f$TLw h;
:RiF3h(
/** FshC )[w,
* @author treeroot h&`y$Jj
* @since 2006-2-2 _~&9*D$ {>
* @version 1.0 DZk1ZLz
*/ f@d9Hqr+l;
public class SortUtil { m(_9<bc>
public final static int INSERT = 1; Us=eq "eu
public final static int BUBBLE = 2; `eR 7H>I
public final static int SELECTION = 3; Om9jtWk
public final static int SHELL = 4; _{)9b24(
public final static int QUICK = 5; to`mnp9Z
public final static int IMPROVED_QUICK = 6; N 9LgU)-Jt
public final static int MERGE = 7; uokc:D
public final static int IMPROVED_MERGE = 8; 4x=(Zw_X
public final static int HEAP = 9; ~KPv7WfG
4-^[%&>}
public static void sort(int[] data) { C?o6(p"b
sort(data, IMPROVED_QUICK); )+EN$*H
} |>+uw|LtZ
private static String[] name={ |##GIIv;i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t,HFz6
}; ! %Ny0JkO
?aWx(dVQ
private static Sort[] impl=new Sort[]{ :o8MUXH$
new InsertSort(), '3Q3lM'lh
new BubbleSort(), cP rwW6
new SelectionSort(), tJ'iX>9I
new ShellSort(), e.8$ga{
new QuickSort(), 7u|B ](FS
new ImprovedQuickSort(), wk @,wOt
new MergeSort(), [_.n$p-
new ImprovedMergeSort(), 24B<[lSK
new HeapSort() iKAusWj
}; WD.U"YI8y
`q_<Im%I
public static String toString(int algorithm){ !Z|($21W
return name[algorithm-1]; qINTCm j
} izuF !9
/{*$JF
public static void sort(int[] data, int algorithm) { Qihdn66
impl[algorithm-1].sort(data); VteEDL/w
} #{PmNx%M
ppN} k)m
public static interface Sort { 6R4<J%$P
public void sort(int[] data); ^R~~L
} Q2QY* A
f~ U.a.Fb
public static void swap(int[] data, int i, int j) { >5ChcefH
int temp = data; ,;jGJr
data = data[j]; m3 -9b"
data[j] = temp; f^b K=#
} ^sClz*%?
} q>s`uFRg(