[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; i!9|R)c
} It8m]FN
int i1=l; 9#A&Qvyywg
int i2=mid+1; 4x%R4tk
for(int cur=l;cur<=r;cur++){ |37y ="
if(i1==mid+1) bTN0n
data[cur]=temp[i2++]; ?3) IzzO
else if(i2>r) TB
data[cur]=temp[i1++]; /WX 0}mWu
else if(temp[i1] data[cur]=temp[i1++]; D%NVqk|
else BavGirCp
data[cur]=temp[i2++]; {s/u[T_D2
} Gv uX"J
} / %:%la%
l9up?opq
} FY6!)/P0I7
>s+TD4OfY
改进后的归并排序: 1}"PLq(
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package org.rut.util.algorithm.support; 9?~K"+-SI
cw)'vAE
import org.rut.util.algorithm.SortUtil; ubvXpK:.
C-6m[W8S
/** 4RXF.kJ3=
* @author treeroot 5? rR'0
* @since 2006-2-2 3"XS#~l%
* @version 1.0 ",&c"r4c
*/ g=)djXW
public class ImprovedMergeSort implements SortUtil.Sort { ]fgYO+
Hg}@2n)/
private static final int THRESHOLD = 10; +GqV9x 8
A(#4$}!n5
/* 37M?m$BL
* (non-Javadoc) jJfV_#'N'
* g9F4nExo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V\(p6:1(6K
*/ Wk"\aoX"E
public void sort(int[] data) { _x ;fTW0
int[] temp=new int[data.length]; OY>0qj
mergeSort(data,temp,0,data.length-1); 'K0=FPB/@
} Rw9 *!<Izt
,{_;q:
private void mergeSort(int[] data, int[] temp, int l, int r) { y$n`+%_
int i, j, k; RU' WHk
int mid = (l + r) / 2; !gfz4f&
if (l == r) J6VG j=/
return; mI$3[ #+
if ((mid - l) >= THRESHOLD) lx!9KQAM*
mergeSort(data, temp, l, mid); c[xH:$G?Y
else Ao/KB_4f*Q
insertSort(data, l, mid - l + 1); aAX(M=3
if ((r - mid) > THRESHOLD) 9WH
mergeSort(data, temp, mid + 1, r); )]?"H
else )K+Tvx3(m
insertSort(data, mid + 1, r - mid); (VxWa#P
7Vd"AVn}g
for (i = l; i <= mid; i++) { :)9^T<
temp = data; 4Nx]*\\
} [x.DwU%S
for (j = 1; j <= r - mid; j++) { iA[WDB\|0
temp[r - j + 1] = data[j + mid]; Ef2#}%>
} o/U"'FP
int a = temp[l]; ~YX!49XfHh
int b = temp[r]; &xGcxFd
for (i = l, j = r, k = l; k <= r; k++) { Q41eYzAi
if (a < b) { a &89K
data[k] = temp[i++]; &74*CO9B9
a = temp; qU) pBA
} else { Q]u*Oels
data[k] = temp[j--]; #ir~v>J||
b = temp[j]; jcT
} 6*:mc
} \?9{H6<=
} 6UkX?I`>
sP+ZE>7
/** JN Ur?+g
* @param data # [0>wEq
* @param l v^;%Fz_Dr
* @param i ~e)`D nJ
*/ 50S >`qi2x
private void insertSort(int[] data, int start, int len) { {U,q!<@mq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5l&9BS&
} 4X5Tyv(Dp
} EZ.|6oug\
} Yc*Ex-s
} 3]X~bQAw
^?5[M^
堆排序： Po=@ 6oB
jnl3P[uQ
package org.rut.util.algorithm.support; h xCt[G@
H#LlxD)q
import org.rut.util.algorithm.SortUtil; (Es0n$Xb
N>'T"^S/
/** d1`us G"
* @author treeroot cTR@ :sm
* @since 2006-2-2 T%\f$jh6
* @version 1.0 4l6+8/Y
*/ @AgV7#
public class HeapSort implements SortUtil.Sort{ 7:h8b/9
iA^GA8dn
/* (non-Javadoc) >$.lM~k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LJ+fZ N
*/ @\=%M^bx
public void sort(int[] data) { HZ#<+~J
MaxHeap h=new MaxHeap(); OC[+t6
h.init(data); ~S],)E1w
for(int i=0;i h.remove(); k365.nc
System.arraycopy(h.queue,1,data,0,data.length); \*C}[D
} $ +`
Xiyh3/%yy
private static class MaxHeap{ KV!!D{VS`@
whzV7RT
void init(int[] data){ Z|z+[V}[
this.queue=new int[data.length+1]; `qjiC>9
for(int i=0;i queue[++size]=data; pV3o\bk!
fixUp(size); V ?10O
} fFHT`"bD:
} d +]Gw
f/r@9\x
private int size=0; er0hf2N]
O%(E 6 n
private int[] queue; Gj.u/l
M=57 d7
public int get() { "0lC:Wu]
return queue[1]; 1w)#BYc=L
} N*C"+2
kc3dWWPe
public void remove() { Y+k)d^6r
SortUtil.swap(queue,1,size--); &wlSOC')j
fixDown(1); P(1bd"Q
} pMB~Lt9
file://fixdown 5df~] -=0Y
private void fixDown(int k) { {~"&$DY2
int j; 7h4"5GlO0
while ((j = k << 1) <= size) { 03iD(,@
if (j < size %26amp;%26amp; queue[j] j++; * 7ki$f!
if (queue[k]>queue[j]) file://不用交换 &J\V !uVo
break; *}t,:N;i
SortUtil.swap(queue,j,k); )1KlcF
k = j; JVzU'd;1!
} ]"3(UKx
} *EZ'S+wR
private void fixUp(int k) { PF,|Wzx
while (k > 1) { fNVNx~E
int j = k >> 1; O6LuFT.
if (queue[j]>queue[k]) #'qEm=%
break; USKa6<:{W
SortUtil.swap(queue,j,k); 2qb,bp1$
k = j; uqhNi!;
} g|W|>`>
} wX3x.@!:
\X=?+| 9
} Z2yZz:.'
"]%.%$
} 9tW=9<E
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SortUtil： F8\nAX
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package org.rut.util.algorithm; nyZUf{:
@ (UacFO
import org.rut.util.algorithm.support.BubbleSort; 7*e7P[LQU
import org.rut.util.algorithm.support.HeapSort; A~CQ@
import org.rut.util.algorithm.support.ImprovedMergeSort; IAD_Tck
import org.rut.util.algorithm.support.ImprovedQuickSort; 3H0~?z_
import org.rut.util.algorithm.support.InsertSort; 9Blc
import org.rut.util.algorithm.support.MergeSort; rUX1Iu7
import org.rut.util.algorithm.support.QuickSort; D Hkmn
import org.rut.util.algorithm.support.SelectionSort; -Mb`I >=
import org.rut.util.algorithm.support.ShellSort; z@lUaMm:F
!BN7 B
/** fIo7R-XP
* @author treeroot %)7HBj(*J
* @since 2006-2-2 'J&&F2O%
* @version 1.0 s V70a3#
*/ !5rja-h
public class SortUtil { SBnwlM"AN
public final static int INSERT = 1; 0ciPH:V
public final static int BUBBLE = 2; kKV`9&dZe
public final static int SELECTION = 3; hw?'aXK{
public final static int SHELL = 4; C F2*W).+
public final static int QUICK = 5; ncEOz1u
public final static int IMPROVED_QUICK = 6; {L[n\h.4.
public final static int MERGE = 7; J?\z{ ;qa
public final static int IMPROVED_MERGE = 8; QRs!B!Fn0
public final static int HEAP = 9; jP{LMmV
C3Mr)
public static void sort(int[] data) { 5B[kZ?>
sort(data, IMPROVED_QUICK); a'f0Wv0%"
} @za X\
private static String[] name={ "o +" Jd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #C+""qm
}; 0hTv0#j#
>&K1+FSmyJ
private static Sort[] impl=new Sort[]{ x)M=_u2 _
new InsertSort(), 2k,!P6fgl
new BubbleSort(), Mf0XQ3n`H
new SelectionSort(), Sm;EWz-?
new ShellSort(), hadGF%> O6
new QuickSort(), s6k,'`.
new ImprovedQuickSort(), 6~Y-bn"%D5
new MergeSort(), sK~d{)+T
new ImprovedMergeSort(), &J~vXk: !
new HeapSort() 4}:a"1P"
}; t_@xzt10y
'H0b1t1S%
public static String toString(int algorithm){ o(iN}.c
return name[algorithm-1]; s2t'jIB
} hcEUkD
P 0xInW F
public static void sort(int[] data, int algorithm) { \`N%77A
impl[algorithm-1].sort(data); Gld|w=qr
} rs$sAa*f
K252l,;|
public static interface Sort { $42C4I*E
public void sort(int[] data); @Oe!*|?mS
} Py$*c
5gP#V K
public static void swap(int[] data, int i, int j) { `nA_WS
int temp = data; U88-K1G
data = data[j]; YYDLFtr2
data[j] = temp; >|jSd2_p
} =F2e*?a3
} GWZ0!V