[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; {DwIjy31T
} m#\[m<F
int i1=l; =45W\
int i2=mid+1; kRlA4h1u_$
for(int cur=l;cur<=r;cur++){ q]FBl}nwl%
if(i1==mid+1) 3-|3`(
data[cur]=temp[i2++]; =6\LIbO
else if(i2>r) .z-UOyer
data[cur]=temp[i1++]; UpfZi9v?W
else if(temp[i1] data[cur]=temp[i1++]; g_aCHEFBv
else W5SNI>|E
data[cur]=temp[i2++]; vHcqEV|P/n
} `PlOwj@u0`
} ^DB{qU
S6sq#kcH
} @AQwr#R"l
e |V]
改进后的归并排序: c\6+=\
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package org.rut.util.algorithm.support; lE8&..~l$+
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import org.rut.util.algorithm.SortUtil; GPhl4#'
{gA\ph%s
/** LTV{{Z+
* @author treeroot ZoB*0H-
* @since 2006-2-2 @$"J|s3M
* @version 1.0 mffn//QS
*/ NgCuFL(Ic
public class ImprovedMergeSort implements SortUtil.Sort { u?Tpi[ #
5AS[\CB4
private static final int THRESHOLD = 10; Qp"y?S
4to% `)]
/* Xv <G-N4
* (non-Javadoc) a {}|Bf<
* <}U'V}g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L9Z;:``p
*/ RgorkZlVM
public void sort(int[] data) { l\AMl \
int[] temp=new int[data.length]; _I`,Br:N
mergeSort(data,temp,0,data.length-1); heaRX4
} U-k+9f 0
:WI.LKlo~
private void mergeSort(int[] data, int[] temp, int l, int r) { pMg3fUIM
int i, j, k; zsU=sTsL
int mid = (l + r) / 2; ?&LZB}1R
if (l == r) E5el?=,i
return; bPD`+:A_
if ((mid - l) >= THRESHOLD) 8(.mt/MR
mergeSort(data, temp, l, mid); R+q"_90_
else V}d9f2
insertSort(data, l, mid - l + 1); kg][qn|>J]
if ((r - mid) > THRESHOLD) jV#ahNq;
mergeSort(data, temp, mid + 1, r); n?\ nn3
else `nKH"TaX
insertSort(data, mid + 1, r - mid); )b<k#(i@#
^JZ^>E~
for (i = l; i <= mid; i++) { \\BCcr\l
temp = data; 9YsR~SM
} ,uw132<b
for (j = 1; j <= r - mid; j++) { F-D]TRG/*]
temp[r - j + 1] = data[j + mid]; ANIz,LS
} +_v$!@L8
int a = temp[l]; ZvYLL{>}w
int b = temp[r]; j*e6vX
for (i = l, j = r, k = l; k <= r; k++) { mNf8kwr
if (a < b) { pME{jD
data[k] = temp[i++]; yc2/~a_Gx
a = temp; Q%/<ZC.Mz6
} else { nJRS.xs
data[k] = temp[j--]; Q'+MFld
b = temp[j]; P o jmC
} E^GHVt/.
} 6{[pou&
} Am8x74?
I$Qs;- (
/** 5qg2Zc~
* @param data +jg9$e"
* @param l JOjoiA
* @param i 5Zmw} M
*/ oLWJm
private void insertSort(int[] data, int start, int len) { j-CnT)W<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ngr/QL]Q
} VIP7OHJh
} M :3u@06a
} ] 2DH;
} ZYf2XI(_"
2^t#6XBk/
堆排序： |K?#$~
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package org.rut.util.algorithm.support; bifS 2>c
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import org.rut.util.algorithm.SortUtil; 1)}=bhT
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/** Auy_K?he]
* @author treeroot ZcuA6#3B
* @since 2006-2-2 \MxoZ
* @version 1.0 QKN<+,h!z>
*/ as=m`DqOh
public class HeapSort implements SortUtil.Sort{ ?[*0+h`en
9Rek4<5
/* (non-Javadoc) :16P.z1L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T!wo2EzE
*/ Te2zK7:
public void sort(int[] data) { < RCLI|
MaxHeap h=new MaxHeap(); >7!6nF3x,
h.init(data); tb:L\A^:
for(int i=0;i h.remove(); %Pksv}
System.arraycopy(h.queue,1,data,0,data.length); l5+gsEux]
} izKfU?2]X@
\#68;)+=
private static class MaxHeap{ Ku&!?m@C
%/>xO3"T
void init(int[] data){ X2tk[Kr
this.queue=new int[data.length+1]; |uW:r17
for(int i=0;i queue[++size]=data; L< zD<M
fixUp(size); &V|>dLT>A
} 5Z4-Z
} |QV!-LK
jjJ2>3avY
private int size=0; qQ!1t>j+H
Soie^$ Y
private int[] queue; {0! ~C=P
{pb>$G:gfx
public int get() { /7!""{1\\
return queue[1]; @/r^%G
} _"4xKh)
GE>[*zN
public void remove() { q1E:l!2al
SortUtil.swap(queue,1,size--); 7bxA]s{m
fixDown(1); \A`hj~
} JT fd#g?I
file://fixdown <p;k)S2J
private void fixDown(int k) { mDh1>>K'~
int j; +UJuB
while ((j = k << 1) <= size) { _C\[DR0n
if (j < size %26amp;%26amp; queue[j] j++; =)O,`.M.Y
if (queue[k]>queue[j]) file://不用交换 ogFKUD*h&>
break; x{NX8lN
SortUtil.swap(queue,j,k); B2Xn?i3 l
k = j; @"T"7c?Cv
} i(?,6)9
} {cpEaOyOM
private void fixUp(int k) { aA-
while (k > 1) { 9w9jpe#
int j = k >> 1; )otb>w5
if (queue[j]>queue[k]) B3Jgd,[
break; 9dMrgz&'
SortUtil.swap(queue,j,k); 1 nvTce
k = j; '8Phxx|
} |*RYq2y
} T5Dw0Y6u,
??hJEE
} %+ZJhHT
$,xnU.n
} bqanFQj
:S$l"wrh\
SortUtil： a?yMHb{F
RtG}h[k/X
package org.rut.util.algorithm; (;VVCAoy
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import org.rut.util.algorithm.support.BubbleSort; kj+#TnF-
import org.rut.util.algorithm.support.HeapSort; VL[)[~^
import org.rut.util.algorithm.support.ImprovedMergeSort; :b[` v
import org.rut.util.algorithm.support.ImprovedQuickSort; H A}f,),G
import org.rut.util.algorithm.support.InsertSort; ,3I^?5
import org.rut.util.algorithm.support.MergeSort; $./bjV%
import org.rut.util.algorithm.support.QuickSort; Ifk#/d
import org.rut.util.algorithm.support.SelectionSort; W4;m H}#0
import org.rut.util.algorithm.support.ShellSort; gn5)SP8
K;7f?52
/** o;b0m;~
* @author treeroot Lp5U"6y
* @since 2006-2-2 PX|=(:(k
* @version 1.0 E{HY!L[
*/ EkT."K
public class SortUtil { 5unG#szq
public final static int INSERT = 1; g~UUP4<$"
public final static int BUBBLE = 2; "o& E2#
public final static int SELECTION = 3; (wc03,K^
public final static int SHELL = 4; +l^LlqA
public final static int QUICK = 5; 5-)#f?
public final static int IMPROVED_QUICK = 6; >hY" 3
public final static int MERGE = 7; 74<!&t
public final static int IMPROVED_MERGE = 8; PNW \*;j
public final static int HEAP = 9; 7^}Ll@
/S:F)MO9
public static void sort(int[] data) { yBLK$@9
sort(data, IMPROVED_QUICK); Qr#1u
} k7tYa;C
private static String[] name={ .^)UO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2!N8rHRt
}; J==SZ v
UR(-q
private static Sort[] impl=new Sort[]{ BF{w)=@/'
new InsertSort(), 5q@LxDy,b
new BubbleSort(), "i:T+#i({O
new SelectionSort(), %hlspI(J
new ShellSort(), P#v*TD'
new QuickSort(), SPj><5Ro
new ImprovedQuickSort(), {;2i.m1
new MergeSort(), 4YZS"K'E
new ImprovedMergeSort(), zb6ju]2
new HeapSort() O7']
}; z}SND9-"
PLM_#+R>
public static String toString(int algorithm){ 1 4LI5T
return name[algorithm-1]; *zO&N^X.4
} ck#"*],
L]a`"CH:a$
public static void sort(int[] data, int algorithm) { TEUY3z[g
impl[algorithm-1].sort(data); KlK`;cr?
} U=bEA1*@0
eUS
public static interface Sort { 'H9=J*9oG
public void sort(int[] data); Bs`$i ;&
} c41: !u^
PR<||"03
public static void swap(int[] data, int i, int j) { NGYyn`Lx
int temp = data; h5 Vv:C
data = data[j]; +b;hBb]R
data[j] = temp; wx=0'T-[
} =1dI>M>tm
} ^s\3/z>b4!