[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; MF7q*f
} k9V#=,K0
int i1=l; j_3X 1w)k
int i2=mid+1; A/WmVv6
for(int cur=l;cur<=r;cur++){ :A~6Gk92A
if(i1==mid+1) S< TUZ /;
data[cur]=temp[i2++]; 4pYscB
else if(i2>r) 7GY3_`
data[cur]=temp[i1++]; anM]khs?
else if(temp[i1] data[cur]=temp[i1++]; N ,8^AUJ3&
else !x%$xC^Iz
data[cur]=temp[i2++]; -&AgjzN!
} i!|OFU6
} 2{-};
xI'sprNa_1
} ~>j5z&:&
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改进后的归并排序: W%6Y?pf)z
|8DMj s()*
package org.rut.util.algorithm.support; 2YS1%<-g*
VL[}
import org.rut.util.algorithm.SortUtil; bu}N{cW
*$+:Cbe-F
/** ^]{)gk8P~2
* @author treeroot Vo G`@^s
* @since 2006-2-2 HVG:q#=C
* @version 1.0 `oPUf!
*/ EG7.FjnVu
public class ImprovedMergeSort implements SortUtil.Sort { y3^>a5z!x
"DpgX8lG_
private static final int THRESHOLD = 10; KF.d:
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/* q'% cVM
* (non-Javadoc) a7Xa3 vlpO
* t XbMP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *(w#*,lv
*/ %UO ;!&K
public void sort(int[] data) { hFLLg|@
int[] temp=new int[data.length]; s)eU^4m
mergeSort(data,temp,0,data.length-1); V\2&?#GZ
} ]:K[{3iM
mO?yrM *
private void mergeSort(int[] data, int[] temp, int l, int r) { oh@|*RU
int i, j, k; uhf% zG
int mid = (l + r) / 2; &_Vd
if (l == r) 5GHW~q!Zo\
return; 9 M<3m
if ((mid - l) >= THRESHOLD) 2Nau]y]=
mergeSort(data, temp, l, mid); A4|L;z/A[h
else MODi:jsl
insertSort(data, l, mid - l + 1); *~b}]M700
if ((r - mid) > THRESHOLD) UpoTXAD}k
mergeSort(data, temp, mid + 1, r); FL8?<bU
else Wh7}G
insertSort(data, mid + 1, r - mid); :krdG%r
$I$ B8
for (i = l; i <= mid; i++) { 3<:m;F*#
temp = data; >'MT]@vez
} \-2O&v'}
for (j = 1; j <= r - mid; j++) { $!m (S&f
temp[r - j + 1] = data[j + mid]; uJg|
} Mu>WS)1lS
int a = temp[l]; 4Ww.CkRG
int b = temp[r]; zF-M9f$_PY
for (i = l, j = r, k = l; k <= r; k++) { B}|(/a@*
if (a < b) { ~A-1x!YiU
data[k] = temp[i++]; K[G=J
a = temp; >AUj4d
} else { ~4t7Q
data[k] = temp[j--]; )V6<'>1WZ
b = temp[j]; V+yyy-/
} S@WzvM
} F%s'R 0l
} ] 1:pnd
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/** {r.yoI4e
* @param data }o{6
* @param l +. ` I
* @param i @4ECz>Q
*/ fg8"fbG`:
private void insertSort(int[] data, int start, int len) { `~S; UG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); no`>r}C
} DFUW^0N
} due'c!wW
} ,FP<# 0F*a
} FJYc*l
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堆排序： ? 016
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package org.rut.util.algorithm.support; r:QLO~l/
P!*G"^0<
import org.rut.util.algorithm.SortUtil; q=+AN</
CPj8`kl
/** j1Q"s(
* @author treeroot g/v"E+
* @since 2006-2-2 c&rS7%
* @version 1.0 JXa5snh{h
*/ 6_#:LFke
public class HeapSort implements SortUtil.Sort{ F]4JemSjK
sBuOKT/j
/* (non-Javadoc) dRXEF6G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F4xXJ"vc
*/ k9|8@3(h
public void sort(int[] data) { UW?(-_8
MaxHeap h=new MaxHeap(); wm<`0}
h.init(data); vXP+*5d/ K
for(int i=0;i h.remove(); ]@rt/ eX
System.arraycopy(h.queue,1,data,0,data.length); F=qG+T
} r`8>@2sW1
Z<2j#rd
private static class MaxHeap{ ^jiYcg@_[
Q Jnji
void init(int[] data){ l)^sE)
this.queue=new int[data.length+1]; >Y\$9W=t
for(int i=0;i queue[++size]=data; f#mcWL1}
fixUp(size); 4*vV9*'!
} z|5Sy.H>
} TcP (?v
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private int size=0; N;A#K7A[@
JO^E x1c
private int[] queue; *t-Wol
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public int get() { wj$J}F
return queue[1]; 6*({ZE
} 0';U3:=i,
0<{zW%w
public void remove() { 2Y`C\u
SortUtil.swap(queue,1,size--); ~}g"Fe
fixDown(1); >>nt3q
} MBO3y&\S4
file://fixdown x^J}]5{0
private void fixDown(int k) { LG/6_t}
int j; b;;C><
while ((j = k << 1) <= size) { Uo7V)I;o
if (j < size %26amp;%26amp; queue[j] j++; =(-oQ<@v
if (queue[k]>queue[j]) file://不用交换 ,vnHEY&
break; 3ZF-n`
SortUtil.swap(queue,j,k); EC]b]'._
k = j; _eE hIQ9
} )l|/lj
} '^!1AGF
private void fixUp(int k) { xD#r5
while (k > 1) { 6]/LrM,23
int j = k >> 1; S5W*,?
if (queue[j]>queue[k]) F_?aoP&5
break; S\F;b{S1
SortUtil.swap(queue,j,k); .+'`A"$8
k = j; UZ`GS$D@
} $GR 3tLzK:
} wTL&m+xr
yd-r7iq
} !5/jDvh
O=9mLI6
} 7LQLeQvB
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SortUtil： }qa8o
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package org.rut.util.algorithm; |@rPd=G^(/
exnFy-
import org.rut.util.algorithm.support.BubbleSort; Td7=La0
import org.rut.util.algorithm.support.HeapSort; mX2(SFpJar
import org.rut.util.algorithm.support.ImprovedMergeSort; ";&5@H|
import org.rut.util.algorithm.support.ImprovedQuickSort; jmDQKqEc|l
import org.rut.util.algorithm.support.InsertSort; ~BSIp .
import org.rut.util.algorithm.support.MergeSort; Y\Z.E;
import org.rut.util.algorithm.support.QuickSort; )o:%Zrk
import org.rut.util.algorithm.support.SelectionSort; ^RS?y8
import org.rut.util.algorithm.support.ShellSort; }i"\?M
O e-FI+7
/** Vm_waa
* @author treeroot (4hCT*
* @since 2006-2-2 *kliI]BF]
* @version 1.0 (zVT{!z
*/ .+;;-]})
public class SortUtil { &L88e\ c+
public final static int INSERT = 1; y)s+/Teb
public final static int BUBBLE = 2; DRo?7_
public final static int SELECTION = 3; u@;6r"8q
public final static int SHELL = 4; lji&]^1
public final static int QUICK = 5; gJkk0wokC
public final static int IMPROVED_QUICK = 6; }67lL~L
public final static int MERGE = 7; B.e3IM0
public final static int IMPROVED_MERGE = 8; -2{NIF^H
public final static int HEAP = 9; Qh4<HQ<9
~HW}Wik
public static void sort(int[] data) { $50/wb6s
sort(data, IMPROVED_QUICK); N^)\+*tf1
} 69z,_p$@:
private static String[] name={ 0/1Ay{ns
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |;G9K`8
}; X9J&OQ[W
dB{VY+!
private static Sort[] impl=new Sort[]{ tAI<[M@
new InsertSort(), Z{9 mZlIy
new BubbleSort(), VZ#@7t
new SelectionSort(), pj~Ao+
new ShellSort(), _'W en
new QuickSort(), F8c^M</
new ImprovedQuickSort(), 7Fg-}lJAC
new MergeSort(), :`pgdn
new ImprovedMergeSort(), ]M:=\h,t>
new HeapSort() BIBBp=+
}; 8?YWE62
)IFzal}o
public static String toString(int algorithm){ dx/NY1
return name[algorithm-1]; jjT|@\-u
} 4 Qo(Wl
l8$7N=Y
public static void sort(int[] data, int algorithm) { Vy-kogVt
impl[algorithm-1].sort(data); ySS kw7
} o 0-3[W'x<
>+9f{FP 9
public static interface Sort { i^i^g5l!
public void sort(int[] data); ;Q1/53Y<
} Po ,zTz
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public static void swap(int[] data, int i, int j) { [K*>W[n
int temp = data; shn{]Y
data = data[j]; Y$@?Y/rhR
data[j] = temp; xE[CNJ%t^,
} Po~u-5
} p+t79F.js