[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; B7TA:K
} 2C%{A
int i1=l; Y$EqBN
int i2=mid+1; RC8{QgaI
for(int cur=l;cur<=r;cur++){ *&B*/HAN
if(i1==mid+1) :x97^.eW~
data[cur]=temp[i2++]; bG>pm|/
else if(i2>r) .bvB8VOrW
data[cur]=temp[i1++]; $6:j3ZTXrt
else if(temp[i1] data[cur]=temp[i1++]; |Gjd
else f3-=?Z
data[cur]=temp[i2++]; #GK&{)$
} '=x
} S,vrz!'>A
V5K!u8T
} :XF;v
2"nd(+QH
改进后的归并排序: SPL72+S`,
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package org.rut.util.algorithm.support; 6Pl$DSu
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import org.rut.util.algorithm.SortUtil; -) $$4<L
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/** lMp)T**
* @author treeroot [dsH0 D&T
* @since 2006-2-2 jh`&c{#*)M
* @version 1.0 gyieSXz[
*/ FgRlxz
public class ImprovedMergeSort implements SortUtil.Sort { PF@<>NO+W
lcvWx%/o@
private static final int THRESHOLD = 10; l{aXX[E&1
m$A|Sx&sG$
/* f6^H Q1SSt
* (non-Javadoc) Hw<t>z k
* br<,?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?YX2CJ6N
*/ F%6al,8P
public void sort(int[] data) { PR~ho&!
int[] temp=new int[data.length]; _=j0Y=/IF
mergeSort(data,temp,0,data.length-1); bR49(K$~
} "VkraB.i
a)4.[+wnRf
private void mergeSort(int[] data, int[] temp, int l, int r) { bWwc2##7jo
int i, j, k; i+jSXn"_
int mid = (l + r) / 2; F[115/
if (l == r) rayC1#f
return; ?bQ~+M\
if ((mid - l) >= THRESHOLD) Az6f I*yP
mergeSort(data, temp, l, mid); =4/lJm``
else I9ubVcV8
insertSort(data, l, mid - l + 1); &K)c*'l
if ((r - mid) > THRESHOLD) {Rjj
mergeSort(data, temp, mid + 1, r); #+QwRmJdT!
else jRXByi=9
insertSort(data, mid + 1, r - mid); d~O\zLQ;
g-meJhX%
for (i = l; i <= mid; i++) { Am!$\T%2
temp = data; &BCl>^wn}
} c&AA< 6pkv
for (j = 1; j <= r - mid; j++) { xgL*O>l)
temp[r - j + 1] = data[j + mid]; hPx=3L$
} Cz Jze
int a = temp[l]; sk$MJSE ~
int b = temp[r]; yFshV\
for (i = l, j = r, k = l; k <= r; k++) { 1'R]An BV
if (a < b) { P$N\o@
data[k] = temp[i++]; RXb+"/
a = temp; %IW=[D6Tg
} else { &voyEvX/S
data[k] = temp[j--]; {*`qL0u]^
b = temp[j]; 3uz@JY"mK
} !V$m!i;
} PE|_V
} -2w\8]u
4rc4}Yu,JI
/** STL_#|[RM
* @param data 8{@|M l
* @param l 5pI2G
* @param i i(2s"Uww,
*/ tqAh&TW3+
private void insertSort(int[] data, int start, int len) { X&TTw/J!^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UOZ"#cQ
} w=s:eM@
} bwqla43gX
} !GURn1vcAe
} xYRN~nr
siZw-.
堆排序： X.}:gU-
O2us+DhQ
package org.rut.util.algorithm.support; lSUEE0V%Q
; ob>$ _
import org.rut.util.algorithm.SortUtil; *ELbz}Q
C3u/8Mrt7
/** )Pakb!0H@t
* @author treeroot lDnF(
* @since 2006-2-2 sikG}p0mx<
* @version 1.0 0[7\p\Q
*/ w [D9Q=
public class HeapSort implements SortUtil.Sort{ ^9%G7J:vGO
tz)aQ6p\X
/* (non-Javadoc) R^<li;Km
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CbVUz<
*/ MVs@~=
public void sort(int[] data) { xJa
MaxHeap h=new MaxHeap(); 0g,;Yzm
h.init(data); cclx$)X1X
for(int i=0;i h.remove(); d0"Hu^]
System.arraycopy(h.queue,1,data,0,data.length); %]h5\%@w
} !<Ma9%uC{
2)Grl;T]s
private static class MaxHeap{ (Gp/^[.%&
TIbiw
void init(int[] data){ t4/d1qW0
this.queue=new int[data.length+1]; A7 qyv0F
for(int i=0;i queue[++size]=data; ']WS@MbJ
fixUp(size); uK6R+a
} 7](,/MeGG
} B+#!%J_
mFw`LvH?*
private int size=0; KbQ UA$gL=
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private int[] queue; `|Pfa
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public int get() { f',n'
return queue[1]; T@GT=1E)
} {Xb 6wQ"
p#wQW[6
public void remove() { (/Lo44wT
SortUtil.swap(queue,1,size--); eY)ugq>'
fixDown(1); pwtB{6)VH{
} !}<d6&!py
file://fixdown S}f3b N
private void fixDown(int k) { rG|lRT3-K
int j; {?!=~vp
while ((j = k << 1) <= size) { _dky+ E
if (j < size %26amp;%26amp; queue[j] j++; ?`bi8 Ck
if (queue[k]>queue[j]) file://不用交换 N DZ :`D
break; 1@rI4U@D
SortUtil.swap(queue,j,k); v;AsV`g
k = j; }:<`L\8q\
} S<#>g s4
} 8/F}vfKEN
private void fixUp(int k) { +!h~T5Ck
while (k > 1) { Z0uo. H@.N
int j = k >> 1; }^U7NZn<"
if (queue[j]>queue[k]) @iwVU]j
break; YRa{6*M
SortUtil.swap(queue,j,k); g X75zso
k = j; HX%lL}E
} F7P?*!dx
} KX D&FDkF
M3P\1
} yB0xa%
: 8dQ8p;
} %Hx8%G!
_uwM%M;
SortUtil： /~~aK2{^X~
h+=xG|1R[5
package org.rut.util.algorithm; v EppkS U1
-< D7
import org.rut.util.algorithm.support.BubbleSort; @{N2I$%6
import org.rut.util.algorithm.support.HeapSort; `G7LM55
import org.rut.util.algorithm.support.ImprovedMergeSort; ]^j:}#R
import org.rut.util.algorithm.support.ImprovedQuickSort; wX5Yo{
import org.rut.util.algorithm.support.InsertSort; 2[!#Xf
import org.rut.util.algorithm.support.MergeSort; hEUS&`K
import org.rut.util.algorithm.support.QuickSort; Z>hS&B
import org.rut.util.algorithm.support.SelectionSort; :/UO3 c(
import org.rut.util.algorithm.support.ShellSort; ko<u0SjF)u
}MQNzaXY^
/** ere h!
* @author treeroot T'_#Dwmj*
* @since 2006-2-2 =h5&:?X
* @version 1.0 g~EN3~
*/ 7X 4/6]*
public class SortUtil { [A~n=m5H
public final static int INSERT = 1; m}Xb#NAF8
public final static int BUBBLE = 2; ?+Gc.lU
public final static int SELECTION = 3; 1<|\df.
public final static int SHELL = 4; -KV)1kET
public final static int QUICK = 5; sNB*S{
public final static int IMPROVED_QUICK = 6; (5CdA1|
public final static int MERGE = 7; :kU#5Aj gK
public final static int IMPROVED_MERGE = 8; K/WnK:LU
public final static int HEAP = 9; X 4L"M%i
K^32nQX
public static void sort(int[] data) { ~EIK
sort(data, IMPROVED_QUICK); z`g4<
} V /i~IG`h/
private static String[] name={ T:FaD V{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )/4eT\=
}; a(.q=W
&[ oW"Q{
private static Sort[] impl=new Sort[]{ 1. A@5*Q
new InsertSort(), efzS]1Jpz
new BubbleSort(), hc7"0mVd{
new SelectionSort(), yM,.{m@F<
new ShellSort(), .-ihxEbzr
new QuickSort(), qmmQHS
new ImprovedQuickSort(), ^.3(o{g
new MergeSort(), eBT+|
new ImprovedMergeSort(), CgT5sk}
new HeapSort() _*iy *:(o
}; <S[]VXy
BjX*Gm6l
public static String toString(int algorithm){ ,4W~CkLD
return name[algorithm-1]; %u=b_4K"j
} kPRG^Ox8e
T-MC|>pv
public static void sort(int[] data, int algorithm) { FYBW3y+AF&
impl[algorithm-1].sort(data); % 9Jx|
} >wSrllmj@
GZxPh&BM?
public static interface Sort { GN1Q\8)o
public void sort(int[] data); %Z~0vwY
} &VPfI
B`<a~V
public static void swap(int[] data, int i, int j) { ]mzghH:E
int temp = data; Mo'6<"x
data = data[j]; M{GT$Q
data[j] = temp; ]g] ]\hS
} }BYs.$7
} 3A&: c/