[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; TXbi>t:/S{
} C?<[oQb#
int i1=l; f'tQLF[r<
int i2=mid+1; Z}IuR|=
for(int cur=l;cur<=r;cur++){ Y$fF"pG?
if(i1==mid+1) 1C/Vwf:@
data[cur]=temp[i2++]; 7{VN27Fa_
else if(i2>r) %+(fdk-k+
data[cur]=temp[i1++]; $_|jI ^
else if(temp[i1] data[cur]=temp[i1++]; ZfS"
else [L
data[cur]=temp[i2++]; sD6vHX%
} MB6lKLy6~
} #9A*BbY
@-ir
} ;Wn0-`_1,
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改进后的归并排序: WpkCFp
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package org.rut.util.algorithm.support; @[5]?8\o
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import org.rut.util.algorithm.SortUtil; MEtKFC|p
]XWtw21I1
/** D/z*F8'c
* @author treeroot &}0#(Fa`
* @since 2006-2-2 )>pIAYCVP
* @version 1.0 D e$K
*/ )$O'L7In&
public class ImprovedMergeSort implements SortUtil.Sort { 3)l<'~"z<
o%h[o9i
private static final int THRESHOLD = 10; #BI6+rfv|
Q:]v4/MT
/* }dEf |6_
* (non-Javadoc) Slp_o\s$@
* 4EhWK;ra
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I=k`VId:
*/ |jKFk.M
public void sort(int[] data) { 2p*L~! iM
int[] temp=new int[data.length]; n,p \~Tu,
mergeSort(data,temp,0,data.length-1); U.ew6`'Te
} C-(O*hK
)r XUJ29.
private void mergeSort(int[] data, int[] temp, int l, int r) { <fDbz1Q;l
int i, j, k; G%%5lw!y'
int mid = (l + r) / 2; f/Q/[2t
if (l == r) uTmT'u:}
return; `t7GYmw^#
if ((mid - l) >= THRESHOLD) |W SvAM3
mergeSort(data, temp, l, mid); ?u{D-by%&
else f%%'M.is
insertSort(data, l, mid - l + 1); D)eRk0iC
if ((r - mid) > THRESHOLD) # tU@\H5kN
mergeSort(data, temp, mid + 1, r); sw,p6T[
else 9n3.Ar
insertSort(data, mid + 1, r - mid); djDE0-QxcR
g7K<"Z {M
for (i = l; i <= mid; i++) { Jx8DVjy
temp = data; Z}>+!Z
} )2bbG4:N
for (j = 1; j <= r - mid; j++) { >UV=k :Q
temp[r - j + 1] = data[j + mid]; B\>3[_n
} _9z+xl
int a = temp[l]; Fz]!2rt
int b = temp[r]; M:%Ll3
for (i = l, j = r, k = l; k <= r; k++) { B,A\/%<
if (a < b) { '~pZj"uy
data[k] = temp[i++]; ^!K 8nW{*
a = temp; E{'\(6z_
} else { (=tu~ ^
data[k] = temp[j--]; 8qs8QK
b = temp[j]; rU7t~DKS
} 9|>5;Ej
} T{Yk/Z/}?
} *35o$P46
wtfM}MW\
/** D!bi>]Yd
* @param data <-!'V,c
* @param l )umW-A
* @param i h6e,w$IL
*/ :a M@"#F
private void insertSort(int[] data, int start, int len) { nY?X@avo>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dg;E,'e_ p
} P~@I`r567
} 'WoB\y569
} P1"g62R
} 9~}8?kPNw=
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堆排序： SqT+rvTh
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package org.rut.util.algorithm.support; HjX)5@"o(
* Vymb
import org.rut.util.algorithm.SortUtil; &-ZRS/_d>
C] |m|`
/** $)7Af6xD
* @author treeroot |bjLmGb
* @since 2006-2-2 ,jMV #H[
* @version 1.0 g)iw.M2
*/ 4?~Ei[KgQn
public class HeapSort implements SortUtil.Sort{ d6"B_,*b
E>qehs,g
/* (non-Javadoc) cONfHl{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `aaT #r
*/ .%mjE'
public void sort(int[] data) { i-&"1D[&
MaxHeap h=new MaxHeap(); *q(HW
h.init(data); L9 H.DNA
for(int i=0;i h.remove(); A|P `\_
System.arraycopy(h.queue,1,data,0,data.length); b'4r5@GO
} Td![Id
20mZ{_%
private static class MaxHeap{ jp-]];:aPJ
uszMzO~
void init(int[] data){ aB4L$M8x
this.queue=new int[data.length+1]; axd9b,
for(int i=0;i queue[++size]=data; K.\-
fixUp(size); )jN fQ!?/
} edh<L/%D
} '5n=tRx
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private int size=0; NKw}VW'|
OGU#%5"<
private int[] queue; lV2MRxI
)1]LoEdm`
public int get() { h3kBNBI )
return queue[1]; =|bW >y
} eR5+1b
nB86oQ/S
public void remove() { 1V1T1
SortUtil.swap(queue,1,size--); !)'|Y5 o
fixDown(1); 69/qH_Y
} $6\W8v
file://fixdown zGE{Z A
private void fixDown(int k) { ?C9>bKo*2H
int j; }#U3vMx(
while ((j = k << 1) <= size) { dLTA21b#
if (j < size %26amp;%26amp; queue[j] j++; \)9R1zp/x
if (queue[k]>queue[j]) file://不用交换 &SK=ZOKg^
break; CI,xp
SortUtil.swap(queue,j,k); Q*AgFF%wn
k = j; T 9?!.o
} VEg/x z4c
} @5(HRd
private void fixUp(int k) { _k.gVm
while (k > 1) { 60Obek`
int j = k >> 1; M;qV% k
if (queue[j]>queue[k]) 1Du9N[2'P
break; j<*`?V^
SortUtil.swap(queue,j,k); L\UM12
k = j; <x2 F5$@
} 5Ai$1'*p
} JSm3ZP|GqJ
k~b8=$
} QYTwGThWR
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} _a,XL<9I
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SortUtil： Sf0[^"7
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package org.rut.util.algorithm; |qsY0zx
o] 7U;W
import org.rut.util.algorithm.support.BubbleSort; R!LKGiN
import org.rut.util.algorithm.support.HeapSort; ss>?fyA
import org.rut.util.algorithm.support.ImprovedMergeSort; abM4G
import org.rut.util.algorithm.support.ImprovedQuickSort; Y_<(~eN`
import org.rut.util.algorithm.support.InsertSort; )z?Kq0
import org.rut.util.algorithm.support.MergeSort; T3 k#6N.
import org.rut.util.algorithm.support.QuickSort; mF !=H%
import org.rut.util.algorithm.support.SelectionSort; CiGN?1|
import org.rut.util.algorithm.support.ShellSort; 3 ,?==?
Aw *:5I[
/** k)R>5?_
* @author treeroot k|}S K9
* @since 2006-2-2 "A?_)=zZ
* @version 1.0 '%"#]
*/ p,w6D,h
public class SortUtil { D`^9 u K
public final static int INSERT = 1; ?V&[U
public final static int BUBBLE = 2; O(E-ox~q
public final static int SELECTION = 3; sIJ37;ZA
public final static int SHELL = 4; ;"/ "
public final static int QUICK = 5; [0G>=h@u
public final static int IMPROVED_QUICK = 6; +2ih!$T;7>
public final static int MERGE = 7; I"=XM
public final static int IMPROVED_MERGE = 8; /aB9pD+%
public final static int HEAP = 9; O}3M+
%7?v='s=
public static void sort(int[] data) { $wn"+wX
sort(data, IMPROVED_QUICK); 4q<:% 0M|
} X7]vXo*
private static String[] name={ ,uP1U@Cas
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =>CrZ23B"
}; hD/bO
~U~4QQV
private static Sort[] impl=new Sort[]{ ?%HtPm2< %
new InsertSort(), qEpP%p
new BubbleSort(), IczEddt@'
new SelectionSort(), ?D6rFUs9;
new ShellSort(), Pz"!8b-MN
new QuickSort(), y|X\f!
new ImprovedQuickSort(), E 2DTE
new MergeSort(), KV0e^c;
new ImprovedMergeSort(), \(LHcvbb
new HeapSort() F#^.L|d4
}; ;D[b25
jL)aU> kN
public static String toString(int algorithm){ 5\tYs=>b<
return name[algorithm-1]; yXw xq(32
} BI=Ie?
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public static void sort(int[] data, int algorithm) { n6nwda
impl[algorithm-1].sort(data); F77[fp
} XI,F^K
qD4e] 5
public static interface Sort { ^dP@QMly6
public void sort(int[] data); R#bg{|
} o=_4v^
<..%@]+
public static void swap(int[] data, int i, int j) { GKPqBi[rO
int temp = data; /kVy#sT|
data = data[j]; ?lU]J]
data[j] = temp; y\@;s?QL
} ASaG }h
} !U/:!e`N