[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; 8Vu@awz{L
} Dfs^W{YA
int i1=l; *85N_+Wv!
int i2=mid+1; ^PG"
for(int cur=l;cur<=r;cur++){ -()WTdIy
if(i1==mid+1) +pd,gG?dW
data[cur]=temp[i2++]; >$q
else if(i2>r) &V4Zmn?UU
data[cur]=temp[i1++]; =D<0&M9C
else if(temp[i1] data[cur]=temp[i1++]; %;`Kd}CO
else ljFq;!I5
data[cur]=temp[i2++]; y3~=8!Tj?Q
} 5c- P lm%
} b.*LmSX#
rPH7 ]]
} Ejug2q
*g5bdQ:Av~
改进后的归并排序: ?Y"%BS+pt
H cmW
package org.rut.util.algorithm.support; <rC%$tr
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import org.rut.util.algorithm.SortUtil; D e&,^"%
d4o ^+\
/** zx@!8Z
* @author treeroot Ow0>qzTg
* @since 2006-2-2 ~J\qkQ
* @version 1.0 EP:`l
*/ gP_N|LuF"
public class ImprovedMergeSort implements SortUtil.Sort { <4rnOQ:
}`=7%b`-?
private static final int THRESHOLD = 10; ZRMim6a4X
/@:X0}L
/* l7`{O/hN
* (non-Javadoc) HT<p=o'$Z
* wFMH\a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !}Xoqamm
*/ j!+jLm!l
public void sort(int[] data) { 8D.c."q
int[] temp=new int[data.length]; TV{GHB!p"
mergeSort(data,temp,0,data.length-1); rLTBBvV
} ?G`m;S
]_C"A
private void mergeSort(int[] data, int[] temp, int l, int r) { RV~t%Sw^
int i, j, k; ni;)6,i
int mid = (l + r) / 2; i1evB9FZ1z
if (l == r) fcq8aW/z_
return; ky2]%cw
if ((mid - l) >= THRESHOLD) zPnb_[YF
mergeSort(data, temp, l, mid); j]Gn\QF
else b<FE
insertSort(data, l, mid - l + 1); gC}}8( k
if ((r - mid) > THRESHOLD) E{ /, b)
mergeSort(data, temp, mid + 1, r); suEK;Bk9
else >zJHvb)b\
insertSort(data, mid + 1, r - mid); luP;P&
IiE6i43
for (i = l; i <= mid; i++) { W.3b]zcV
temp = data; Kx9u|fp5
} @i#JlZM_
for (j = 1; j <= r - mid; j++) { `r$7Cc$C
temp[r - j + 1] = data[j + mid]; 8 a]'G)(ts
} C0N :z.)4
int a = temp[l]; C1^%!)
int b = temp[r]; q>_<\|?%x
for (i = l, j = r, k = l; k <= r; k++) { dWz?`B{'
if (a < b) { O9daeIF0#
data[k] = temp[i++]; m>=DJ{KQ
a = temp; ^ ]9K>}
} else { [IAUJ09>I
data[k] = temp[j--]; $0$sM/%
b = temp[j]; MpOU>\
} [9 MH"\
} t:2DB)
} K]|UdNo
"t^v;?4
/** t7byOMC
* @param data i q`}c |c
* @param l &tH?m;V
* @param i nI6gd%C
*/ xM%4/QE+
private void insertSort(int[] data, int start, int len) { )Qb,zS6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i"&FW&W
} |Gic79b
} R;DU68R
} =}Tm8b0
} r w!jmvHE&
4&W?:=H2
堆排序： #Hrzk!&9
m!7%5=Fc
package org.rut.util.algorithm.support; ?xR7Ii3
811>dVq3/
import org.rut.util.algorithm.SortUtil; >!Yuef <P
~5,^CTAM
/** K/W=r
* @author treeroot EHUx~Q
* @since 2006-2-2 t"$~o:U&)
* @version 1.0 ?=&; A
*/ e!5} #6Kd
public class HeapSort implements SortUtil.Sort{ -;9 }P
IV,4BQ$
/* (non-Javadoc) n^nE&'[?0g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n#+EG3
*/ N,TV?Q5l7
public void sort(int[] data) { CyIlv0fd}
MaxHeap h=new MaxHeap(); BAQ-1kSz
h.init(data); D|q~n)TW5
for(int i=0;i h.remove(); 7IxeSxXH
System.arraycopy(h.queue,1,data,0,data.length); z>N[veX%
} 6\8d6x>
ZPZh6^cc
private static class MaxHeap{ aDdxR:
'?C6P5fm
void init(int[] data){ 6nTM~]5.
this.queue=new int[data.length+1]; e(7#>O%1
for(int i=0;i queue[++size]=data; vK!`#W`X
fixUp(size); E !!,JnU
} =muQ7l:(
} -$8ew+
E`TZ:W]r,
private int size=0; -m@c{&r
yV.p=8:
private int[] queue; Dck/Ea
L3{(Bu
public int get() { :9QU\{2
return queue[1]; .HZd.*
} gBqDx|G
[e><^R*u
public void remove() { jZ.yt+9
SortUtil.swap(queue,1,size--); LhO\a
fixDown(1); 3%*igpj\)
} S#]]h/
file://fixdown *aCL/:
private void fixDown(int k) { yX!fj\R
int j; FQ>$Ps*a[
while ((j = k << 1) <= size) { k3bQ32()
if (j < size %26amp;%26amp; queue[j] j++; Q:q0C +T
if (queue[k]>queue[j]) file://不用交换 {N~mDUoJ|
break; ndD>Oc}"3
SortUtil.swap(queue,j,k); .,u>WIUxj
k = j; [~N;d9H+*1
} cb_C2+%8NA
} GDLi?3q
private void fixUp(int k) { <)ZQRE@
while (k > 1) { ^t'mW;C$4
int j = k >> 1; QYbB\Y
if (queue[j]>queue[k]) {L;sF=d
break; O}"oz3H
SortUtil.swap(queue,j,k); 3A,N1OXG
k = j; [K?
} Ii+3yE@c
} *}vvS^c0
P8m0]T.&x
} ; $rQ
?J2{6,}O*.
} \kQ)fk]^
OH@"]Nc~
SortUtil： :lai0> D
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package org.rut.util.algorithm; =G}a%)?As\
1NP
import org.rut.util.algorithm.support.BubbleSort; e]1=&:eX#d
import org.rut.util.algorithm.support.HeapSort; ~m=GS[=
import org.rut.util.algorithm.support.ImprovedMergeSort; NAo.79
import org.rut.util.algorithm.support.ImprovedQuickSort; GXZ="3W |
import org.rut.util.algorithm.support.InsertSort; ;"&?Okz
import org.rut.util.algorithm.support.MergeSort; wKpGJ& {
import org.rut.util.algorithm.support.QuickSort; Kyh6QA^
import org.rut.util.algorithm.support.SelectionSort; k5< n:dS
import org.rut.util.algorithm.support.ShellSort; k*A(7qQA`4
r $S9/
/** %R$)bGT
* @author treeroot FJ84'T\~
* @since 2006-2-2 h.tj8O1
* @version 1.0 <qR$ `mLN
*/ hp)>Nzdx
public class SortUtil { 6 :4GI
public final static int INSERT = 1; wwl,F=| Y
public final static int BUBBLE = 2; )FwOg;=3M"
public final static int SELECTION = 3; St?mq* ,
public final static int SHELL = 4; `)a|Q
public final static int QUICK = 5; 4>(K~v5;N
public final static int IMPROVED_QUICK = 6; Kvg=7o
public final static int MERGE = 7; KJFQ)#SW!
public final static int IMPROVED_MERGE = 8; !po,Z&
public final static int HEAP = 9; ),{3LIr
ai;!Q%B#Q
public static void sort(int[] data) { W^elzN(
sort(data, IMPROVED_QUICK); p+P@I7V
} P{dR pH|
private static String[] name={ :fmV||Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9-n]_AF`0
}; v Z10Rb8
NATi)A"TZ
private static Sort[] impl=new Sort[]{ o2(w
new InsertSort(), |6NvByc,
new BubbleSort(), (&m1*
new SelectionSort(), 9y\nO)\Tv
new ShellSort(), X)SUFhP\
new QuickSort(), 87[o^)8
new ImprovedQuickSort(), %enJ[a%Qg
new MergeSort(), n^QDMyC;I
new ImprovedMergeSort(), q"Bd-?9
new HeapSort() 08:K9zr
}; PE7V1U#$o,
=x w:@(]{
public static String toString(int algorithm){ g{DOQA
return name[algorithm-1]; [vtDtwL
} #~j$J
>]}VD "\
public static void sort(int[] data, int algorithm) { 2^s&#@n3t
impl[algorithm-1].sort(data); NZ`6iK-V_
} \nOV2(FAT
W{IP}mM
public static interface Sort { kk126?V]_
public void sort(int[] data); IF>v -Z
} 0D:uM$ i]
' Sd&I:?
public static void swap(int[] data, int i, int j) { WL%T nux
int temp = data; .~'q yD2V
data = data[j]; .aZB?MW
data[j] = temp; *RkvM?o@jC
} ~i^,Z&X:
} #O^zA`D