[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; a;M{-G
} Fop +xR,Z
int i1=l; yf4L0.
int i2=mid+1; TY'61xWi
for(int cur=l;cur<=r;cur++){ Chx+p&!
if(i1==mid+1) 6<R[hIWpZ}
data[cur]=temp[i2++]; 0z4M/WrNt
else if(i2>r) ?,8+1"|$A]
data[cur]=temp[i1++]; ju.pQ=PSX
else if(temp[i1] data[cur]=temp[i1++]; rPqM&&+
else a(D=ZKbVU
data[cur]=temp[i2++]; JY^i
} Dg{d^>T!_x
} =9,^Tu|
FouN}X6
} het<#3Bo
N-Z=p)]
改进后的归并排序: %\n|2*r
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package org.rut.util.algorithm.support; AQT_s9"0
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import org.rut.util.algorithm.SortUtil; 7mMMVz2
cO5zg<wF
/** =6"5kz10
* @author treeroot {<Gp5j
* @since 2006-2-2 X J)Y-7c
* @version 1.0 o0|Ex\
*/ pe\Nwq
public class ImprovedMergeSort implements SortUtil.Sort { V/kndV[j
={V@Y-5T
private static final int THRESHOLD = 10; Pnm$g;`P
1?1Bz?EKF*
/* SY%y*6[6
* (non-Javadoc) 0y?;o*&U\
* -B&(&R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gZ7R^] k
*/ UxzF5V5
public void sort(int[] data) { W I MBwmg
int[] temp=new int[data.length]; bv b\G
mergeSort(data,temp,0,data.length-1); 8&| o
} G9yK/g&q
Y0A(-"
private void mergeSort(int[] data, int[] temp, int l, int r) { ;FRUB@:
int i, j, k; _vDmiIn6K
int mid = (l + r) / 2; .kn2M&P>=
if (l == r) a#;;0R $
return; |5O>7~Tp
if ((mid - l) >= THRESHOLD) $~W5! m
mergeSort(data, temp, l, mid); &} `a"tYr
else =!xX{o?64
insertSort(data, l, mid - l + 1); q CYu@Ho
if ((r - mid) > THRESHOLD) wWiYxBeN
mergeSort(data, temp, mid + 1, r); Q}KOb4D
else $?bD55
insertSort(data, mid + 1, r - mid); L\E>5G;
&tvp)B?cWk
for (i = l; i <= mid; i++) { l&'q+F
temp = data; q!@!eC[b
} 4gsQ:3
for (j = 1; j <= r - mid; j++) { 7bihP@I!
temp[r - j + 1] = data[j + mid]; ZDgT"53
} ^-[ I;P
int a = temp[l]; =CZRX' +yN
int b = temp[r]; qqf*g=f
for (i = l, j = r, k = l; k <= r; k++) { wCruj`$
if (a < b) { Zis,%XY
data[k] = temp[i++]; %xOxMK@
a = temp; |%v:>XEO
} else { G2)F<Y
data[k] = temp[j--]; }X^MB
b = temp[j]; VN!nef
} FpA t
} c {%mi
} -OlrA{=c_
10*Tk 8
/** XGH:'^o_
* @param data Kw"y#Ys]
* @param l #X?[")R
* @param i jYRSV7d
*/ nW7: ]
private void insertSort(int[] data, int start, int len) { bS r"k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j9hfW'
} =2Yt[8';
} YZ4`b-
} KGg S"d
} "g&f:[a/
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堆排序： -ZZJk-::
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package org.rut.util.algorithm.support; 3zD#V3=
^Z?m)qxvB
import org.rut.util.algorithm.SortUtil; C|TQf8
>Wt@O\k
/** 9$;5J
* @author treeroot 4=Ru{ewRV
* @since 2006-2-2 "5~?`5Ff
* @version 1.0 XxS#~J?:_
*/ &zX W
public class HeapSort implements SortUtil.Sort{ H/x0'
x"e;T,c
/* (non-Javadoc) IONo&~-l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vjx'yh|
*/ 8VMA~7^
public void sort(int[] data) { \]]K{DO
MaxHeap h=new MaxHeap(); B=& [Z2
h.init(data); @tm2Y%Y!
for(int i=0;i h.remove(); 7cGOJA5&
System.arraycopy(h.queue,1,data,0,data.length); Qr$ 7 U6p
} 1bCE~,tD
!6=;dX
private static class MaxHeap{ &|GH@^)@
DX>LB$dy?
void init(int[] data){ S W%>8
this.queue=new int[data.length+1]; bXF8V
for(int i=0;i queue[++size]=data; c-XO}\?
fixUp(size); >jhcSvM6
} mnK<5KLg1
} JR.)CzC
-(:T&rfTp
private int size=0; v.Bwg7R3
A&t8C8,
private int[] queue; `+n#CWZ"Y
Yu_*P-Ja6
public int get() { J4::.r
return queue[1]; y,x 2f%x
} MLHCBRi
8p%0d`sX
public void remove() { K $- *
SortUtil.swap(queue,1,size--); IeYNTk&<
fixDown(1); e&VC}%m
} zl:by?
file://fixdown 6LCtWX
private void fixDown(int k) { p7Wt(A
int j; }vZf&ib-
while ((j = k << 1) <= size) { -J+1V{
if (j < size %26amp;%26amp; queue[j] j++; ~iH a^i?2*
if (queue[k]>queue[j]) file://不用交换 :a;F3NJ
break; it\$Pih]
SortUtil.swap(queue,j,k); O~V^]
k = j; q<q IT
} KMIe%2:b5
} >=;-:
private void fixUp(int k) { g:Qq%'
while (k > 1) { ) ~=pt&+
int j = k >> 1; B1 }-
if (queue[j]>queue[k]) \{ EVRRXn
break; gPk,nB
SortUtil.swap(queue,j,k); mc?IM(t
k = j; -#f.}H'
} TF:'6#p
} hb3:,c(
7wx=#
} G|Et'k.F4
u.X]K:Yow
} [E a{);
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SortUtil： g,JfT^
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package org.rut.util.algorithm; 3(V0,L'1
qo3+=*"V
import org.rut.util.algorithm.support.BubbleSort; _{k*JT2
import org.rut.util.algorithm.support.HeapSort; >B0AJW/u
import org.rut.util.algorithm.support.ImprovedMergeSort; P".}Y[GD
import org.rut.util.algorithm.support.ImprovedQuickSort; vK)'3%
import org.rut.util.algorithm.support.InsertSort; Zo&i0%S\E
import org.rut.util.algorithm.support.MergeSort; yk?bz
import org.rut.util.algorithm.support.QuickSort; R%RbC!P
import org.rut.util.algorithm.support.SelectionSort; >JE+j=
import org.rut.util.algorithm.support.ShellSort; n/1t UF
ik(YJw'i7E
/** N E9,kWI
* @author treeroot qK.(wFx
* @since 2006-2-2 68u?}8}
* @version 1.0 uxTgK'3
*/ <7U~0@<Y
public class SortUtil { b&[".ibN1
public final static int INSERT = 1; &!/>B .
public final static int BUBBLE = 2; Li5&^RAo|J
public final static int SELECTION = 3; .|[{$&B
public final static int SHELL = 4; YgcW1}
public final static int QUICK = 5; eWAD;x?.
public final static int IMPROVED_QUICK = 6; `qs,V
public final static int MERGE = 7; ^>l <)$s
public final static int IMPROVED_MERGE = 8; -8qCCV&1i
public final static int HEAP = 9; jI\@<6O
_ZhQY,
public static void sort(int[] data) { 5]Rbzg2t
sort(data, IMPROVED_QUICK); 8S8qj"s
} gvT}UNqL
private static String[] name={ f9u=h}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *zPqXtw!j
}; o664b$5nsI
:%sBY0 yF
private static Sort[] impl=new Sort[]{ h}SZ+G/L
new InsertSort(), jXA/G%:[
new BubbleSort(), uluAqDz`
new SelectionSort(), I^k&v V
new ShellSort(), @)h>vg
new QuickSort(), 06Wqfzceb
new ImprovedQuickSort(), $4g{4-)
new MergeSort(), o^2MfFS
new ImprovedMergeSort(), ZXb|3|D
new HeapSort() F0_w9"3E~
}; fU|v[
.S|7$_9;b
public static String toString(int algorithm){ sn:VMHrOT
return name[algorithm-1]; M99ku'
} 6m?<"y8]
XF(D%ygeC
public static void sort(int[] data, int algorithm) { =Iop
impl[algorithm-1].sort(data); |-V:#1wR.]
} &233QRYM
(y]Z*p:EW
public static interface Sort { L@H^?1*L?
public void sort(int[] data); jaEe$2F2
} bI ;I<Qa
MBt\"b#t
public static void swap(int[] data, int i, int j) { &'fER-
int temp = data; pSlc (M>
data = data[j]; Y_[7q<L
data[j] = temp; `r SOt*<
} yq;[1O_9C
} 1=J& ^O{W