[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; Q$L(fHkw
} 8Jj0-4]
int i1=l; 3]es$Jy
int i2=mid+1; ]?`p_G3O
for(int cur=l;cur<=r;cur++){ x 4</\o
if(i1==mid+1) F5MPy[
data[cur]=temp[i2++]; 34kd|!e,
else if(i2>r) [B @j@&
data[cur]=temp[i1++]; ug"<\"
else if(temp[i1] data[cur]=temp[i1++]; H;|:r[d!
else |uBC0f
data[cur]=temp[i2++]; 3og$'#6P
} H`lD@q'S
} "@w%TcA
AuipK*&g
} i?dKmRp(@y
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改进后的归并排序: >o#wP
'a^tL[rLP1
package org.rut.util.algorithm.support; =Fy8rTdk6r
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import org.rut.util.algorithm.SortUtil; oK:P@V6!
%H@76NvEz
/** zn1Rou]6
* @author treeroot ~C7<a48x
* @since 2006-2-2 ;OU>AnWr(&
* @version 1.0 ;;hyjFGq%
*/ ]NV ]@*`tO
public class ImprovedMergeSort implements SortUtil.Sort { zf>^2t*\
xevP2pYG:
private static final int THRESHOLD = 10; A'QGTT
YQdX>k
/* $YY)g$
* (non-Javadoc) X/K)kIi
* 9XqAjez\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \Fg6b6
*/ #x@lZ!Y
public void sort(int[] data) { etMh=/NFV
int[] temp=new int[data.length]; 2qMsa>~
mergeSort(data,temp,0,data.length-1); ZWRRh^
} bH&)rn
Ij}F<ZgZG
private void mergeSort(int[] data, int[] temp, int l, int r) { t`YZ)>Ws
int i, j, k; aC~n:0v
int mid = (l + r) / 2; F*JvpI[7n
if (l == r) (2bZ]
return; !aw#',r8m
if ((mid - l) >= THRESHOLD) N^(lUba
mergeSort(data, temp, l, mid); l()MYuLNV
else 2, "q_d'V
insertSort(data, l, mid - l + 1); ,,gLrVk
if ((r - mid) > THRESHOLD) vF6*c
mergeSort(data, temp, mid + 1, r); J2< QAX
else q6JW@GT
insertSort(data, mid + 1, r - mid); Xu94v{u3
DwY<qNWT
for (i = l; i <= mid; i++) { X0Z-1bs
temp = data; -F+P;S
} O0wCb
for (j = 1; j <= r - mid; j++) { \y H3Y
temp[r - j + 1] = data[j + mid]; ;s\;78`0
} -N7L#a
int a = temp[l]; 3R%UPT0>
int b = temp[r]; "G9'm
for (i = l, j = r, k = l; k <= r; k++) { ) Zb`~w
if (a < b) { f./m7TZ
data[k] = temp[i++]; omv6_DdZ
a = temp; hQ}7Z&O
} else { c\)&yGE
data[k] = temp[j--]; cP@F #!2
b = temp[j]; PL9eUy
} >[H&k8\7n
} n^pZXb;Y
} A?IZ( Zx(`
B(\r+"PB
/** H8-D'q>R
* @param data *M&VqG4P9w
* @param l 3_\{[_W
* @param i 2@3.xG
*/ $TA6S+
private void insertSort(int[] data, int start, int len) { !q$&JZY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -e{)v'C)
} oa &z/`@
} 9U=fJrj'u
} 5Hwo)S]r
} VqClM
~S^X"8(U
堆排序： `o_fUOe8a
c/=y*2,zo
package org.rut.util.algorithm.support; Y0PGT5].@'
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import org.rut.util.algorithm.SortUtil; OS"{"P
^s2m\Q(
/** _[TH@fO6:
* @author treeroot 'o/N}E!Pt
* @since 2006-2-2 P('t6MVlT
* @version 1.0 "s>fV9YyZ
*/ 2fzKdkJhe
public class HeapSort implements SortUtil.Sort{ %R5Com
fys5-1@-p
/* (non-Javadoc) %[Zqr;~l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^)OZ`u8
*/ r}oURy,5
public void sort(int[] data) { {}g %"mi#
MaxHeap h=new MaxHeap(); Z(Eke
h.init(data); \7,MZt
for(int i=0;i h.remove(); A-a17}fta
System.arraycopy(h.queue,1,data,0,data.length); r*6"'W>c6
} ;V(H7 ZM
){+[$@9
private static class MaxHeap{ a IpPL8a
KbwTj*k[
void init(int[] data){ kUn2RZ6$#
this.queue=new int[data.length+1]; llHc=&y#
for(int i=0;i queue[++size]=data; .Na&I)udX.
fixUp(size); S9HBr
} -}Cc"qm
} Mhe|eD#)
(!ZQ
private int size=0; Ig1lol:;
<H5n>3#pH
private int[] queue; aJ:A%+1
Xr?>uqY!M
public int get() { ='dLsh4P2N
return queue[1]; 3:[!t%Yb
} cxXbo a
W!/vm
public void remove() { L289'Gzg
SortUtil.swap(queue,1,size--); U@.u-)oX
fixDown(1); ;RWW+x8IB
} 8%o~4u3
file://fixdown lo+xo;Nd
private void fixDown(int k) { `E3:;|
int j; 2Vp>"
while ((j = k << 1) <= size) { X,RT<GNNb
if (j < size %26amp;%26amp; queue[j] j++; /x
if (queue[k]>queue[j]) file://不用交换 bKk CW
break; [1z{T(dh
SortUtil.swap(queue,j,k); brg":V1a
k = j; j|VXC(6P,
} 81g9ZV(4
} Ro'jM0(KE
private void fixUp(int k) { Md8(`@`o
while (k > 1) { |Du,UY/
int j = k >> 1; >vlQ|/C
if (queue[j]>queue[k]) ?. zu2
break; bK3B3r#$
SortUtil.swap(queue,j,k); |}_gA
k = j; H1` rM^,%A
} \#PP8
} B/jrYT$;m
Ln ~4mN^
} <1aa~duT
uuu\f*<
} IWAj Mwo
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SortUtil： >9-Dd)<
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package org.rut.util.algorithm; MWBXs75I
W`#gpi)7N
import org.rut.util.algorithm.support.BubbleSort; xME(B@j
import org.rut.util.algorithm.support.HeapSort; mR"uhm}q
import org.rut.util.algorithm.support.ImprovedMergeSort; {bN Y
import org.rut.util.algorithm.support.ImprovedQuickSort; 6 -]>]Hr-
import org.rut.util.algorithm.support.InsertSort; za,6du6
import org.rut.util.algorithm.support.MergeSort; fC_zX}3
import org.rut.util.algorithm.support.QuickSort; x.I][(}
import org.rut.util.algorithm.support.SelectionSort; kr^0% A
import org.rut.util.algorithm.support.ShellSort; G9\EZ\x!
RNGO~:k?r
/** /sy-;JDnsu
* @author treeroot csYy7uzi
* @since 2006-2-2 r+o_t2_b*
* @version 1.0 X*0k>j
*/ wi>DZkR
public class SortUtil { SijtTY#r
public final static int INSERT = 1; >f>V5L%1
public final static int BUBBLE = 2; StEQ -k
public final static int SELECTION = 3; !?jK1{E3
public final static int SHELL = 4; +<&E3Or
public final static int QUICK = 5; c8T/4hU MN
public final static int IMPROVED_QUICK = 6; Truc[A.2Z
public final static int MERGE = 7; Zw+=ng.q?
public final static int IMPROVED_MERGE = 8; 8pqs?L@W
public final static int HEAP = 9; Gc wt7~
FtE90=$
public static void sort(int[] data) { d$}&nV/A)
sort(data, IMPROVED_QUICK); sTiYf
} Q*gnAi&.#
private static String[] name={ D>P;Izb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0}B?sNr
}; Q.yb4
{o( * f
private static Sort[] impl=new Sort[]{ G(3;;F7"
new InsertSort(), )`^ /(YG
new BubbleSort(), }7%9}2}Iw
new SelectionSort(), E-^2"j>o
new ShellSort(), 2SYKe$e
new QuickSort(), EOhC6>ATh
new ImprovedQuickSort(), [O\9 9>
new MergeSort(), "9w}dQ
new ImprovedMergeSort(), &I%IaNco
new HeapSort() avg4K*vv
}; ^;+[8:Kb
K!p,x;YX
public static String toString(int algorithm){ \6{LR&
return name[algorithm-1]; +s ULo
} #G[t X6gU
^+wk
public static void sort(int[] data, int algorithm) { 40u7fojg2
impl[algorithm-1].sort(data); !~)90Z!
} u\f3qc,]F
B_hPcmB
public static interface Sort { mg`j[<wp
public void sort(int[] data); f~q4{
} L"^OdpOs
k=`$6(>Fz
public static void swap(int[] data, int i, int j) { "CBRPp
int temp = data; #BsW
data = data[j]; P].eAAXnP
data[j] = temp; L/yaVU{aEb
} :> SLQ[1
} `^x9(i/NE