[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; Ce%fz~*b
} CPj8`kl
int i1=l; 0Ia8x?80V
int i2=mid+1; e>a4v8
for(int cur=l;cur<=r;cur++){ p\&Lbuzv
if(i1==mid+1) 'K:zW>l
data[cur]=temp[i2++]; ra[*E4P9L*
else if(i2>r) hDsSOpj
data[cur]=temp[i1++]; LaolAqU
else if(temp[i1] data[cur]=temp[i1++]; S7fX1y[
else ]=EYju@
data[cur]=temp[i2++]; U<"@@``+N
} +LEU|#
} @|hn@!YK
6$k"B/k
} o(5eb;"yi>
%l.5c Sn@
改进后的归并排序: TTSyDl
?-HLP%C('
package org.rut.util.algorithm.support; $QB~ x{v@n
y {PUklq
import org.rut.util.algorithm.SortUtil; +YA,HhX9
zP(UaSXz/
/** F4|Z:e,Hr
* @author treeroot v.~uJ.T
* @since 2006-2-2 8qi6>}A
* @version 1.0 6bXP{,}Gp
*/ TjswB#
public class ImprovedMergeSort implements SortUtil.Sort { n(}zq
XX:?7:j}[8
private static final int THRESHOLD = 10; f'>270pH
[Jjb<6[o
/* ;94e
* (non-Javadoc) Ld?-Ik~fF>
* |8:IH@K*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @VVDN
*/ QwaAGUA
public void sort(int[] data) { MMYV8;c
int[] temp=new int[data.length]; Oz:J8l%
mergeSort(data,temp,0,data.length-1); #,4CeD|(D,
} zKP{A Sk
F6$QEiDu@
private void mergeSort(int[] data, int[] temp, int l, int r) { A3Lfh6O
int i, j, k; jZ5 mpYUO
int mid = (l + r) / 2; 8FmRD
if (l == r) AzmISm
return; 9:\YEs"
if ((mid - l) >= THRESHOLD) NGYUZ\m
mergeSort(data, temp, l, mid); `]q>A']Dl
else hj_%'kk-A
insertSort(data, l, mid - l + 1); y`n'>F11
if ((r - mid) > THRESHOLD) x2M'!VK>n1
mergeSort(data, temp, mid + 1, r); d;-/F b{4
else 7 z#Xf
insertSort(data, mid + 1, r - mid); ofu {g
0<{zW%w
for (i = l; i <= mid; i++) { `]0E)
temp = data; ox2?d<dC6
} (i"@{[IP
for (j = 1; j <= r - mid; j++) { WN+D}z]
temp[r - j + 1] = data[j + mid]; c@]_V
} sr*3uI-)L
int a = temp[l]; m/`"~@}&
int b = temp[r]; rphfW:
for (i = l, j = r, k = l; k <= r; k++) { zxV,v*L)
if (a < b) { -q}c;0vL-a
data[k] = temp[i++]; 9PM\D@A{
a = temp; :*`5|'G}
} else { Xaca=tsO
data[k] = temp[j--]; =(-oQ<@v
b = temp[j]; @/w($w"
} f'2Ufd|J|
} -b7q)%V
} ;Az9p h
j1yW{
/** &QoV(%:]
* @param data ~G;lEp
* @param l Pl>S1
* @param i t5qNfiKC
*/ VEuT!^0Z
private void insertSort(int[] data, int start, int len) { Jbmi[`O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h dw~AGO#
} >H*?ktcW
} F_?aoP&5
} [ ;$(;
} 20O\@}2q2M
n'&Cr0{
堆排序： ~`<(T)rs
6;:s N8M+1
package org.rut.util.algorithm.support; xjplJ'jB
**%/Ke[
import org.rut.util.algorithm.SortUtil; k6pXc<]8
vwlPFrLl
/** "i}?jf {a
* @author treeroot !5/jDvh
* @since 2006-2-2 }aPx28:/
* @version 1.0 FBR]) h'Z
*/ 7LQLeQvB
public class HeapSort implements SortUtil.Sort{ -j6&W`
&6yh4-(7
/* (non-Javadoc) \}:&Hl+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \G!TC{6
*/ 8w:A""
public void sort(int[] data) { 5$(qnOi
MaxHeap h=new MaxHeap(); aQzu[N
h.init(data); i"#36CVT~
for(int i=0;i h.remove(); P{'T9U|O-
System.arraycopy(h.queue,1,data,0,data.length); (}E ] g
} }AZ0BI,TI
^Ia:e ?)W
private static class MaxHeap{ ~BSIp .
;~2RWj=-
void init(int[] data){ :z^VI M
this.queue=new int[data.length+1]; sn4wd:b7%
for(int i=0;i queue[++size]=data; d^0vaX6e}
fixUp(size); &<s[(w!%%
} LFi8@
} F@76V$U.
B``)
private int size=0; bpQ5B'9
r&u&$"c
private int[] queue; }bW"Z2^nB
!c;Z<@
public int get() { #LGAvFA*_F
return queue[1]; fO;#;p.
} 7kQZ$sLc
Ic%c%U=i
public void remove() { |Sne\N>%
SortUtil.swap(queue,1,size--); -*Voui
fixDown(1); SnK#YQCDt
} P|>pm]>C
file://fixdown 4H<@da}
private void fixDown(int k) { .ykCmznf*
int j; vS!%!-F
while ((j = k << 1) <= size) { 7_HJ|QB
if (j < size %26amp;%26amp; queue[j] j++; Y5 BWg
if (queue[k]>queue[j]) file://不用交换 gJkk0wokC
break; W'>"E/Tx#O
SortUtil.swap(queue,j,k); LSR{N|h+)
k = j; +/bT4TkML
} yX%Xjo__*t
} !`3q9RT3."
private void fixUp(int k) { XS L*e
while (k > 1) { 9]{(~=D7
int j = k >> 1; zNF.nS}:
if (queue[j]>queue[k]) ;^Q- 1
break; $50/wb6s
SortUtil.swap(queue,j,k); Gk!06
k = j; $P9'"a)Lm
} yX^/Oc@j
} Rh[%UNl
@Kx@ 2#~b
} s/;iZiWK
8f\sG:$
} +A 4};]W|
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SortUtil： 6AM-^S@
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package org.rut.util.algorithm; Gu3# y"a>
&YSjwRr
import org.rut.util.algorithm.support.BubbleSort; d".Xp4}f
import org.rut.util.algorithm.support.HeapSort; gPo3jwo$
import org.rut.util.algorithm.support.ImprovedMergeSort; |#y+iXTJ
import org.rut.util.algorithm.support.ImprovedQuickSort; z'FpP
import org.rut.util.algorithm.support.InsertSort; _'W en
import org.rut.util.algorithm.support.MergeSort; J%Cn
import org.rut.util.algorithm.support.QuickSort; @v#]+9F
import org.rut.util.algorithm.support.SelectionSort; Uz;z
import org.rut.util.algorithm.support.ShellSort; Wfw6(L
{Q%"{h']
/** N"tEXb/,
* @author treeroot 3gUGfedi
* @since 2006-2-2 BIBBp=+
* @version 1.0 }m`+E+T4
*/ $CgJ+ua\8
public class SortUtil { /nbHin#we
public final static int INSERT = 1; ^an3&
public final static int BUBBLE = 2; 9kpCn.rJ
public final static int SELECTION = 3; 'aW}&!H M
public final static int SHELL = 4; pb\W7G
public final static int QUICK = 5; i9QL}d
public final static int IMPROVED_QUICK = 6; 5Tl3k=o}
public final static int MERGE = 7; P?.j wI
public final static int IMPROVED_MERGE = 8; lY.{v]i }
public final static int HEAP = 9; (jV_L1D
S)$)AN<O
public static void sort(int[] data) { zKnHo:SV
sort(data, IMPROVED_QUICK); %, U@ D4w
} 55mDLiA
private static String[] name={ l"C)Ia&/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m(B,a,g<
}; eJ=K*t|
myR}~Cj;q
private static Sort[] impl=new Sort[]{ K&\3j-8^
new InsertSort(), yV'<l .N
new BubbleSort(), hC nqe
new SelectionSort(), lZt{L0
new ShellSort(), Y$@?Y/rhR
new QuickSort(), z_A:MoYfo
new ImprovedQuickSort(), g9rsw7
new MergeSort(), Po~u-5
new ImprovedMergeSort(), &!adW@y
new HeapSort() ;;*'<\lP.j
}; Q>G lA
1L4-hYtCj
public static String toString(int algorithm){ !oJ226>WI
return name[algorithm-1]; ^GyGh{@,f
} $bGe1\
kVH^(Pi
public static void sort(int[] data, int algorithm) { KMhEU**
impl[algorithm-1].sort(data); YgeU>I|v
} h rksPK"s2
MFHc>O DA
public static interface Sort { A.5N<$l
public void sort(int[] data); N?RJuDW
} ]+OHxCj:
hj8S".A_
public static void swap(int[] data, int i, int j) { #fuc`X3:HL
int temp = data; >z,SN
data = data[j]; 6F@2:]W
data[j] = temp; {m<NPtp910
} EYsf<8cl
} Z7Y+rP[l