[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; ABc)2"i:*
} RlrZxmPV>O
int i1=l; id^|\hDR
int i2=mid+1; 6 }!Z"
for(int cur=l;cur<=r;cur++){ pTWg m\h
if(i1==mid+1) ,9mgYp2
data[cur]=temp[i2++]; e8,{|a
else if(i2>r) }!8nO;
data[cur]=temp[i1++]; d<x1*a
else if(temp[i1] data[cur]=temp[i1++]; ;hwzYXWF
else 3cqQL!Gm
data[cur]=temp[i2++]; i'HPRY
} b6"}"bG
} T7{<arL$
cGNvEM(4AV
} Q"%S~&#'
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改进后的归并排序: j$Nf%V 6Y
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package org.rut.util.algorithm.support; Ry z?v<)h
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import org.rut.util.algorithm.SortUtil; %ISq>A)%
}B0sC%cm
/** rfs(#
* @author treeroot GP+2/D
* @since 2006-2-2 TnNWO+kg
* @version 1.0 HY;9?KJ'
*/ o)&"Rf
public class ImprovedMergeSort implements SortUtil.Sort { GRT]aw
3pSj kS|?>
private static final int THRESHOLD = 10; */w7?QOv
ydQ!4
/* wiJRCH
* (non-Javadoc) 56DoO'
* l$a?A[M$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ! Z;T-3^.
*/ U\jb"
public void sort(int[] data) { Fu7M0X'p
int[] temp=new int[data.length]; fN)x#?
mergeSort(data,temp,0,data.length-1); o@W_ai_
} mu[Op*)
oQT2S>cm^
private void mergeSort(int[] data, int[] temp, int l, int r) { B>z?ClH$R
int i, j, k; x7dEo%j
int mid = (l + r) / 2; ?[)yGRzO2
if (l == r) S8" f]5s
return; zrRFn `B
if ((mid - l) >= THRESHOLD) *}cSE|S%
mergeSort(data, temp, l, mid); 7+nm31,<O
else *%!M4&
insertSort(data, l, mid - l + 1); l{$[}<
if ((r - mid) > THRESHOLD) GqLq gns
mergeSort(data, temp, mid + 1, r); (}smW_`5
else [Atc "X$
insertSort(data, mid + 1, r - mid); Fi2xr<7"
E!J=8C.:
for (i = l; i <= mid; i++) { 8#X_#
temp = data; PLA#!$c7q
} _c2WqQ-05
for (j = 1; j <= r - mid; j++) { c8ZA5|
temp[r - j + 1] = data[j + mid]; V.6)0fKZW
} gEwd &J
int a = temp[l]; sw;|'N$:<
int b = temp[r]; *k [J6
for (i = l, j = r, k = l; k <= r; k++) { &|9.}Z8U
if (a < b) { |=6_ xRyr
data[k] = temp[i++]; r37[)kJ
a = temp; 8 #}D :(
} else { %}3qR~;
data[k] = temp[j--]; 8(f:U@BS
b = temp[j]; FhkkWWL
} 3mO;JXd
} m$wlflt
} ]~0}=,H$N
5~'IKcW<
/** jlqv2V7=/
* @param data /,s[#J
* @param l }Fa%%}
* @param i J?&l*_m;t
*/ Sk}{E@
private void insertSort(int[] data, int start, int len) { MS3=~*+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "OmD@ EMT
} ?o*I9[Z)
} )Si2u5
} Ps4 ZFX
} lv%9MW0 z
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堆排序： J2VTo: In
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package org.rut.util.algorithm.support; //f
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import org.rut.util.algorithm.SortUtil; 7Nzbz3
% 0T+t.
/** LP];x3
* @author treeroot "V&I^YSc>
* @since 2006-2-2 |[$~\MU
* @version 1.0 x/ *-P b-_
*/ +4))/`DA
public class HeapSort implements SortUtil.Sort{ !bnyJA
r;&>iX4B
/* (non-Javadoc) U_B((Z(g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yg9joNBh
*/ @FO)0
public void sort(int[] data) { BlA[T%
MaxHeap h=new MaxHeap(); "IQ/LbOqm_
h.init(data); =elpH^N
for(int i=0;i h.remove(); ZcJ\ZbE|
System.arraycopy(h.queue,1,data,0,data.length); hk[ %a$Y
} QHq,/kWY
72W s K"
private static class MaxHeap{ O%8EZyu
9(4&KZpK
void init(int[] data){ R?o$Y6}5
this.queue=new int[data.length+1]; c!K]J
for(int i=0;i queue[++size]=data; O@V%Cu
fixUp(size); r!PpUwod
} ^T::-pN*
} iBTYY{-wF
S!v(+|
private int size=0; 0Hxmm@X2
jho**TQ P
private int[] queue; Om;&_!i
!%)FJ:p
public int get() { $D'-k]E[H
return queue[1]; BZ!v%4^9
} ;!!n{l$r'
&-d&t` `
public void remove() { u&mS8i}
SortUtil.swap(queue,1,size--); @a:>$t
fixDown(1); ).^}AFta
} xG&)1sT#-\
file://fixdown Gs+3e8
private void fixDown(int k) { Eow_&#WW;P
int j; l vMlL5t
while ((j = k << 1) <= size) { hCjR&ZA
if (j < size %26amp;%26amp; queue[j] j++; %h?x!,q Y
if (queue[k]>queue[j]) file://不用交换 !$-\;<bZw
break; YG[;"QR
SortUtil.swap(queue,j,k); 9RN-suE[
k = j; T&4qw(\G
} Ez|oN,
} FKNMtp[`
private void fixUp(int k) { J_x13EaV0
while (k > 1) { CHrFM@CM
int j = k >> 1; ,(8;y=wux
if (queue[j]>queue[k]) WmY``
break; ojyIQk+
SortUtil.swap(queue,j,k); S"wR%\NIp
k = j; 7(5xL T$
} 5[0 O'%$
} y{dTp
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} S4=~`$eP
)OiT{-m
} b2b^1{@h;v
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SortUtil： 5?hw !
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package org.rut.util.algorithm; *%{gYpn
QFYWA1<pDh
import org.rut.util.algorithm.support.BubbleSort; [0"'T[ok
import org.rut.util.algorithm.support.HeapSort; Llr>9(|
import org.rut.util.algorithm.support.ImprovedMergeSort; +qh[N@F
import org.rut.util.algorithm.support.ImprovedQuickSort; Ut2y;2)a
import org.rut.util.algorithm.support.InsertSort; _?OW0x4
import org.rut.util.algorithm.support.MergeSort; DxUKUE
import org.rut.util.algorithm.support.QuickSort; |<:vY
import org.rut.util.algorithm.support.SelectionSort; yE}}c{hSn
import org.rut.util.algorithm.support.ShellSort; ~//fN}~R
)+:EJH~
/** $5Xh,DOg
* @author treeroot #Q2Y&2`yGT
* @since 2006-2-2 Y.g59X!Ub2
* @version 1.0 J]nohICe
*/ uc;8 K,[t
public class SortUtil { n4}Br;%
public final static int INSERT = 1; :xtXQza"-
public final static int BUBBLE = 2; :yUEkm8
public final static int SELECTION = 3; N5a*7EJv+
public final static int SHELL = 4; bbrXgQ`s+w
public final static int QUICK = 5; c-B cA
public final static int IMPROVED_QUICK = 6; 9FB19
public final static int MERGE = 7; =EHUR'
public final static int IMPROVED_MERGE = 8; u(fm@+$^
public final static int HEAP = 9; |&RU/a
KXx32 b,~
public static void sort(int[] data) { 8C*c{(4
sort(data, IMPROVED_QUICK); Y;?{|
} 9WyAb3d'
private static String[] name={ 0u;4%}pD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :Zlwp6
}; ;M)QwF1
z6*X%6,8
private static Sort[] impl=new Sort[]{ r"P|dlV-
new InsertSort(), KET2Ws[w
new BubbleSort(), r>o63Q:
new SelectionSort(), D)L+7N0D~
new ShellSort(), DGS$Ukz&T
new QuickSort(), \WxukYH
new ImprovedQuickSort(), L7dd(^
new MergeSort(), 03q5e
new ImprovedMergeSort(), < jJ
new HeapSort() OX\A|$GS
}; I}1NB3>^
wOU_*uY@6'
public static String toString(int algorithm){ kM,C3x{A
return name[algorithm-1]; 02c':a=7
} RZXjgddL
\G*0"%!U
public static void sort(int[] data, int algorithm) { >CHrg]9
impl[algorithm-1].sort(data); lhy*h_>
} ?l9XAWt\
D]zwl@sRX:
public static interface Sort { nAv#?1cjz
public void sort(int[] data); aDU<wxnSvO
} k$blEa4
sB7# ~pA
public static void swap(int[] data, int i, int j) { Zy`m!]G]80
int temp = data; h1de[q)
data = data[j]; Q+[n91ey**
data[j] = temp; :tV*7S=)
} x(1:s|Uyp{
} Fld=5B^}