[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; EK^JLvyT
} S>.q5
int i1=l; UVz=QEuYb
int i2=mid+1; =sxkrih
for(int cur=l;cur<=r;cur++){ uijq@yo8-
if(i1==mid+1) /g13X,.H
data[cur]=temp[i2++]; BQ).`f";d
else if(i2>r) :sU!PF[<
data[cur]=temp[i1++]; d:A\<F
else if(temp[i1] data[cur]=temp[i1++]; ]U_5\$
else }*0,>w>
data[cur]=temp[i2++]; x6"/z
} 1aBD^^Y
} GVeL~Q
4s[`yV
} -)p@BtMS
>Dk1axZ!>/
改进后的归并排序: fKFnCng
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package org.rut.util.algorithm.support; rH[5~U
9 aY'0wa
import org.rut.util.algorithm.SortUtil; ?$UH9T9)
Qk?jGXB>^
/** I).=v{@9V<
* @author treeroot &,^mM' C
* @since 2006-2-2 NKRaQr
* @version 1.0 c'"#q)
*/ ,jAx%]@,I
public class ImprovedMergeSort implements SortUtil.Sort { !>CE(;E>z
V+Y|4Y&
private static final int THRESHOLD = 10; R 4DM_u
d&/^34gn
/* d^ 2u}^kG
* (non-Javadoc) s>LA3kT
* TFAYVK~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~D<7W4c
*/ E%-Pyg*
public void sort(int[] data) { @<hF.4,]
int[] temp=new int[data.length]; ;gZwQ6)i
mergeSort(data,temp,0,data.length-1); oxUE79
} &r&;<Q
K4iI:
private void mergeSort(int[] data, int[] temp, int l, int r) { eKL]E!
int i, j, k; !x`;>0
int mid = (l + r) / 2; ,O$Z,J4VL
if (l == r) Mi;}.K0J
return; =6.8bZT\
if ((mid - l) >= THRESHOLD) qlz( W
mergeSort(data, temp, l, mid); 83mlZ1jQz
else 6\; 4 4,3
insertSort(data, l, mid - l + 1); ;M%oQ>].[
if ((r - mid) > THRESHOLD) u)<Ysx8G
mergeSort(data, temp, mid + 1, r); N!tpzHXw
else jjJc1p0
insertSort(data, mid + 1, r - mid); $KoPGgC[
l[tY,Y:4qO
for (i = l; i <= mid; i++) { mgmWDtxN
temp = data; ST[2]
} 9zXu6<|qrL
for (j = 1; j <= r - mid; j++) { ^</65+OT+
temp[r - j + 1] = data[j + mid]; r~ZS1Tp
} 5F'%i;)oq
int a = temp[l]; Yh}zt H
int b = temp[r]; LEYWH%y
for (i = l, j = r, k = l; k <= r; k++) { %1Vu=zCAW
if (a < b) { clh3
data[k] = temp[i++]; SQ1M4:hP
a = temp; M'pb8jf
} else { 2#>$%[
data[k] = temp[j--]; ..vSL
b = temp[j]; o?:;8]sr!
} ;X?Ah
} TYs+XJ'Xj
} ]jHh7> D
BNAguAxWo
/** #E- VW
* @param data k98< s
* @param l $sA,$x:^xI
* @param i 8[6ny=S`
*/ 7Vz[ji
private void insertSort(int[] data, int start, int len) { bBkm] >
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !^c:'I>~
} o|R*POM
} "Y"t2l_n
} FK4nz2&4
} A)b)ff,
tIz<+T_
堆排序： ig2{lEkF
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package org.rut.util.algorithm.support; 8zP:*|D
tc+GR?-7W
import org.rut.util.algorithm.SortUtil; t_[M&
GM)\)\kNF
/** 3::3r}g
* @author treeroot DhtU]w}
* @since 2006-2-2 h(C#\{V
* @version 1.0 M/::`yJQu
*/ {:};(oz)f
public class HeapSort implements SortUtil.Sort{ k| _$R?
'1>g=Ic0
/* (non-Javadoc) Hmz=/.$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9;E%U2T7
*/ 5}.,"Fbr
public void sort(int[] data) { @A~B ,
MaxHeap h=new MaxHeap(); /3CHE8nSh
h.init(data); oso1uAOfp
for(int i=0;i h.remove(); D..{|29,:
System.arraycopy(h.queue,1,data,0,data.length); N<#S3B?.
} 2*~JMbm
}m=tzHB*
private static class MaxHeap{ p56KS5duI.
)bB"12Z|8
void init(int[] data){ g|&.v2 '
this.queue=new int[data.length+1]; J8sJ~FnUj
for(int i=0;i queue[++size]=data; J6*\>N5W
fixUp(size); {pcf;1^t
} LY@1@O2@
} 9TYw@o5V
&A ;3; R
private int size=0; P?Gd}mdX?m
`^XRrVX<
private int[] queue; x'E'jh%
[?|l X$<
public int get() { lKh2LY=j
return queue[1]; N>&{Wl'y\
} P.[6s$J
?V&Ld$db
public void remove() { F]K$u<U
SortUtil.swap(queue,1,size--); ZYwBw:y}y
fixDown(1); %5Q7#xU
} i#pjv'C
file://fixdown &y#\1K
private void fixDown(int k) { ^]#Ptoz^(l
int j; [OFTP#}c
while ((j = k << 1) <= size) { Pi&fwGL
if (j < size %26amp;%26amp; queue[j] j++; B|]t\(~$[
if (queue[k]>queue[j]) file://不用交换 ,(@Y%UW:
break; Dg9--wI}I9
SortUtil.swap(queue,j,k); "k\Ff50
k = j; rQd1Ch
} M-&^
} ?J^IAFy
private void fixUp(int k) { 'NQMZfz
while (k > 1) { p?Z+z
int j = k >> 1; xWenKY,
if (queue[j]>queue[k]) }AMYU>YE=
break; t7C!}'g&'
SortUtil.swap(queue,j,k); |:7EJkKZ
k = j; FT*yso:X/
} |kBg8).B
} r)9i1rI+
_g^K$+F'}
} CI~hmL0
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} ~_dBND?
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SortUtil： A:8FJ3'
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package org.rut.util.algorithm; Q8}TNJsU
K%[}[.cW
import org.rut.util.algorithm.support.BubbleSort; 1}n)J6m
import org.rut.util.algorithm.support.HeapSort; %T&&x2p^=?
import org.rut.util.algorithm.support.ImprovedMergeSort; }2iKi(io*
import org.rut.util.algorithm.support.ImprovedQuickSort; WL)_8!
import org.rut.util.algorithm.support.InsertSort; UZ4tq
import org.rut.util.algorithm.support.MergeSort; 4 BE:&A
import org.rut.util.algorithm.support.QuickSort; ]zhq.O >2{
import org.rut.util.algorithm.support.SelectionSort; wRV`v$*6
import org.rut.util.algorithm.support.ShellSort; %mB!|'K%
8r`VbgI&
/** =\Tud-1Z
* @author treeroot M@!]U:5~V
* @since 2006-2-2 YWcui+4p}
* @version 1.0 &P,4EaC9;
*/ =B/s HN
public class SortUtil { 2#$}yP~
public final static int INSERT = 1; QN2*]+/h
public final static int BUBBLE = 2; LhVLsa(-%
public final static int SELECTION = 3; cdek^/
public final static int SHELL = 4; uusY,Dt/9
public final static int QUICK = 5; :N*q;j>
public final static int IMPROVED_QUICK = 6; 32iWYN
public final static int MERGE = 7; eSvc/CU
public final static int IMPROVED_MERGE = 8; ;4S [ba1/
public final static int HEAP = 9; ?v)"%.
$X.'W\o|
public static void sort(int[] data) { $dVgFot
sort(data, IMPROVED_QUICK); lk+=26>
} bY"eC i{K
private static String[] name={ Ol/2%UJXL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HAI1%F236
}; Q8gdI
JX2 |
private static Sort[] impl=new Sort[]{ b]so9aCz
new InsertSort(), +X%fcoc
new BubbleSort(), fUL{c,7xda
new SelectionSort(), U"%8"G0)
new ShellSort(), -pU\"$nuxH
new QuickSort(), e%@[d<Ta\
new ImprovedQuickSort(), +NzD/.gq
new MergeSort(), of[|b{Ze4~
new ImprovedMergeSort(), yNWbI0a
new HeapSort() W"}*Q-8W
}; <4!&iU+;
R^u^y{ohr
public static String toString(int algorithm){ sxC{\iLY%
return name[algorithm-1]; S{"6PXzb
} -%/,j)VKD
<-oRhi4
public static void sort(int[] data, int algorithm) { 9TXm Z
impl[algorithm-1].sort(data); =DF@kR[CH"
} 1+i
v0jz)z<#
public static interface Sort { ]uj.uWD
public void sort(int[] data); Tm~#wL +r
} U*qK*"k
!Pi? !
public static void swap(int[] data, int i, int j) { 9V4V}[%
int temp = data; On96N|
data = data[j]; eed\0
data[j] = temp; ["#A-S
} +DV6oh
} o7 -h'b-