[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; ^b)8l
} hd*bPj;
int i1=l; Cisv**9
int i2=mid+1; $oKT-G
for(int cur=l;cur<=r;cur++){ 6}bUX_!&s
if(i1==mid+1) b z3&
data[cur]=temp[i2++]; n<47#-
else if(i2>r) Bu4J8eLx
data[cur]=temp[i1++]; Eshc"U
else if(temp[i1] data[cur]=temp[i1++]; T0Lh"_X3
else Yg_;Eu0'?
data[cur]=temp[i2++]; 04{*iS95J
} p&'oJy.P
} $|~YXH~O
T;/Y/Fd
} YU! SdT$
ZZ/F}9!=
改进后的归并排序: \ci'Cbn\o
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package org.rut.util.algorithm.support; 3(D!]ku~m
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import org.rut.util.algorithm.SortUtil; owYf1=G
+dd\_\
/** 26n+v(re
* @author treeroot VNKtJmt
* @since 2006-2-2 @64PdM!L
* @version 1.0 4LY kK/:
*/ ~Y=v@] 2/
public class ImprovedMergeSort implements SortUtil.Sort { *N5cC#5`=
!Yuu~|
private static final int THRESHOLD = 10; 7q_B`$ata
n^Co
/* 2xy &mNx
* (non-Javadoc) q)S70M_1
* x;d*?69f]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xD[O8vQE
*/ nff X
public void sort(int[] data) { Kgev*xg
int[] temp=new int[data.length]; g *}M;"
mergeSort(data,temp,0,data.length-1); Fy(-.S1
} iU3GUsPy
GF(<!PC
private void mergeSort(int[] data, int[] temp, int l, int r) { AC*> f&
int i, j, k; |ymw])L
int mid = (l + r) / 2; ke$g[g
if (l == r) b[}f]pB@n
return; 'n1-?T)
if ((mid - l) >= THRESHOLD) QkMK\Up
mergeSort(data, temp, l, mid); 72J@Dc
else Y`$dtg {
insertSort(data, l, mid - l + 1); 3/+r*lv>X
if ((r - mid) > THRESHOLD) qfF/X"#0
mergeSort(data, temp, mid + 1, r); JBY`Y]V3
else \KmgFyF
insertSort(data, mid + 1, r - mid); !ho~@sc{W
,+`1/
for (i = l; i <= mid; i++) { 3{wr*L1%-~
temp = data; ySC;;k'
} A6D.bJ)
for (j = 1; j <= r - mid; j++) { _^{!`*S
temp[r - j + 1] = data[j + mid]; L< 3U)Gp
} 4x8e~/
int a = temp[l]; 7S"W7O1>
int b = temp[r]; {J_1.uN=
for (i = l, j = r, k = l; k <= r; k++) { !YJfP@"e6r
if (a < b) { =*K~U# uoC
data[k] = temp[i++]; 3]Jl\<0
a = temp; VXr'Z
} else { j,@N0~D5
data[k] = temp[j--]; []opPQ 1
b = temp[j]; k[6%+
} i-6,r[<
} _," -25a
} cE}y~2cH
jkz.qo-%
/** +C`h*%BW
* @param data Grot3a
* @param l gWlv;oq
* @param i NI(fJ%U
*/ 'FVh/};Y.D
private void insertSort(int[] data, int start, int len) { aI8k:FK"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ssdpwn'
} JY$B%R4;]
} rU^?Z
} ARcPHV<(2
} A\{dq:
2?=R_&0Q
堆排序： 2=?/$A9p
n%N|?!rB
package org.rut.util.algorithm.support; tCkKJ)m
Jxyeh1zqB
import org.rut.util.algorithm.SortUtil; w QV4[
Ww(($e!
/** @|yRo8|
* @author treeroot 8&q|*/2
* @since 2006-2-2 2|J>e(&akY
* @version 1.0 &hciv\YT2W
*/ j2oHwt6"
public class HeapSort implements SortUtil.Sort{ ?`& l Y
M]\p9p(_
/* (non-Javadoc) >FrF"u:kM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) al{;]>W
*/ >MXE)=
public void sort(int[] data) { h>s|MZQ:*
MaxHeap h=new MaxHeap(); Qi&!Ub]
h.init(data); j/I^\Ms
for(int i=0;i h.remove(); *hJ&7w ~
System.arraycopy(h.queue,1,data,0,data.length); l`#XB:#U
} Kk?]z7s-4
l)JNNcej
private static class MaxHeap{ xR9<I:^&
NF/@'QRT
void init(int[] data){ -Oj}PGj$e\
this.queue=new int[data.length+1]; #Y)Gos
for(int i=0;i queue[++size]=data; sIx8,3`&y
fixUp(size); 4';~@IBf
} /CpU.^V
} DA>_9o/l
o6{[7jI
private int size=0; Mi|PhDXMh
>]6inS9
private int[] queue; [&IJy
f 7g?{M
public int get() { '|v??`o#
return queue[1]; .f+ul@o
} tS$^k)ZXip
H@!\?5I
public void remove() { B,`B!rU
SortUtil.swap(queue,1,size--); a}oFL%=?
fixDown(1); v37TDY3;
} L^}i7nJ
file://fixdown RbexsBq
private void fixDown(int k) { D%tcYI(
int j; aT v
while ((j = k << 1) <= size) { )v1y P
if (j < size %26amp;%26amp; queue[j] j++; %RlG~a
if (queue[k]>queue[j]) file://不用交换 \ C^fi}/]
break; n|G x29E
SortUtil.swap(queue,j,k); }3G`f> s
k = j; /h/f&3'h
} zli@XZ#
} u}zCcWP|L
private void fixUp(int k) { ]Q?`|a+i
while (k > 1) { H9d!-9I
int j = k >> 1; DK!QGATh
if (queue[j]>queue[k]) BhO*Pfs
break; 3<5E254N
SortUtil.swap(queue,j,k); P>*B{fi^
k = j; m@|0iDS
} #>I*c_-
} Zd2B4~V
Mqy5>f)
} OxGS{zs
\S]"nHX
} [2]Ti_ >D
IK:F~I
SortUtil： b^SQCX+P
E?L^L3s
package org.rut.util.algorithm; ZGstD2N$
.@#GNZe
import org.rut.util.algorithm.support.BubbleSort; 'qhi8=*
import org.rut.util.algorithm.support.HeapSort; r8o9C
import org.rut.util.algorithm.support.ImprovedMergeSort; g{t)I0xm
import org.rut.util.algorithm.support.ImprovedQuickSort; r&^xg`i[z>
import org.rut.util.algorithm.support.InsertSort; h.A@o#x
import org.rut.util.algorithm.support.MergeSort; RW4}n< 88
import org.rut.util.algorithm.support.QuickSort; \Lp|S:u
import org.rut.util.algorithm.support.SelectionSort; 3LxhQVx2
import org.rut.util.algorithm.support.ShellSort; (?9@nS
4 _*^~w
/** !B&OK&*
* @author treeroot |4=Du-e
* @since 2006-2-2 h92'~X36
* @version 1.0 XI4le=^EM
*/ *]L(,_:"
public class SortUtil { Bh'_@PHP
public final static int INSERT = 1; !=C74$TH
public final static int BUBBLE = 2; 2ZZ%BV!s
public final static int SELECTION = 3; j. @CB`
public final static int SHELL = 4; 17-D\ +}
public final static int QUICK = 5; C-vFl[@a0
public final static int IMPROVED_QUICK = 6; vG`;2laY
public final static int MERGE = 7; /7s^OkQ
public final static int IMPROVED_MERGE = 8; *bi!iz5F
public final static int HEAP = 9; *.4VO+^
Y|*a,H"_
public static void sort(int[] data) { b7]MpL
sort(data, IMPROVED_QUICK); 0j=xWC
} ;y"=3-=vM"
private static String[] name={ q_5hKipd\b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hKG)* Q
}; j_3X 1w)k
mes/gqrJ1I
private static Sort[] impl=new Sort[]{ ,KT[ }P7
new InsertSort(), {S+ $C
new BubbleSort(), *,hg+?lZ
new SelectionSort(), `R9}.?7
new ShellSort(), scXY~l]I*
new QuickSort(), TSgfIE|
new ImprovedQuickSort(), <BUKTRq
new MergeSort(), K2'Il[
new ImprovedMergeSort(), 1 P0)La#
new HeapSort() _TGv"c@V
}; ;x]CaG)f
K\bA[5+N
public static String toString(int algorithm){ TzPG(f
return name[algorithm-1]; 8ZnHp~
} m$ubxI)
!Zr 9t|_
public static void sort(int[] data, int algorithm) { 4[&L<D6h
impl[algorithm-1].sort(data); m%=] j<A
} vpnOc2 -
+>w %j&B
public static interface Sort { p!b_tyJ
public void sort(int[] data); D-v}@tS'
} M,uQ8SZA[
v;%>F)I
public static void swap(int[] data, int i, int j) { )z:"P;b"Nl
int temp = data; T5:p^;?g
data = data[j]; /t4#-vz
data[j] = temp; Rxl )[\A*
} n7CwGN%
} WbIf)\