[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; ]T<RC\o
} :as2fO$?
int i1=l; i/DUB<>p6
int i2=mid+1; B?XqH_=0L
for(int cur=l;cur<=r;cur++){ ^@maF<Jb
if(i1==mid+1) G{s q|1
data[cur]=temp[i2++]; m!<uY?,hf
else if(i2>r) w##$SaTI
data[cur]=temp[i1++]; 9H%L;C5<
else if(temp[i1] data[cur]=temp[i1++]; Ut"F b
else :jWQev"/
data[cur]=temp[i2++]; :2&W9v
} ma2-66M~j
} _nW#Cl~
LwCf}4u"
} M[dJQ(
r/ LgmVRn
改进后的归并排序: tw]Q5:6
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package org.rut.util.algorithm.support; A3e83g~L
9<!Ie^o?
import org.rut.util.algorithm.SortUtil; )e\IdKl=
!vSj1w
/** dBp)6ok#c
* @author treeroot i\k>2df
* @since 2006-2-2 )6-!,D0db
* @version 1.0 p?sC</R
*/ IsiCHtY9
public class ImprovedMergeSort implements SortUtil.Sort { %wux#"8
=qTmFszT
private static final int THRESHOLD = 10; <bOi}
z)y{(gR
/* -6>T0-
* (non-Javadoc) 7%^/Jm
* OM7EmMa;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u"1Zv!
*/ Hk|wO:7Be
public void sort(int[] data) { +dSO?Y]
int[] temp=new int[data.length]; ??`zW
mergeSort(data,temp,0,data.length-1); DlbNW& V
} _0e;&2')
<@2g.+9
private void mergeSort(int[] data, int[] temp, int l, int r) { 3At%TA:
int i, j, k; %FO#j6
int mid = (l + r) / 2; Tf?|*P
if (l == r) 3It9|Y"6[
return; 'e06QMp@
if ((mid - l) >= THRESHOLD) C.;H?So(
mergeSort(data, temp, l, mid); p{4nWeH?B
else p!3!&{
insertSort(data, l, mid - l + 1); Vq<\ixRi
if ((r - mid) > THRESHOLD) 2i_k$-
mergeSort(data, temp, mid + 1, r); 5QUL-*t
else nhPua&
insertSort(data, mid + 1, r - mid); ,O/ t6'
$Q< >MB7
for (i = l; i <= mid; i++) { N3g\X
temp = data; 5ki<1{aVtZ
} KI{B<S3*Z
for (j = 1; j <= r - mid; j++) { [oh0 )wzB
temp[r - j + 1] = data[j + mid]; E#m|Sq
} RW04>oxVn
int a = temp[l]; wm/=]*jpK
int b = temp[r]; h"DxgG
for (i = l, j = r, k = l; k <= r; k++) { 1x~dsM;q
if (a < b) { a6i%7Om
data[k] = temp[i++]; 1MnT*w
a = temp; jou741
} else { tjTnFP/=
data[k] = temp[j--]; pw5uH
b = temp[j]; %ryYa
} YRm6~c
} E1-BB
} m3i+b
7$u}uv`j
/** %d#h<e|,.
* @param data -kz9KGkPb+
* @param l U}2b{
* @param i &;]KntxB
*/ h#7p&F
private void insertSort(int[] data, int start, int len) { Doj>Irj?7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nL@(|nJ[
} j!<(`
} J}'a|a@bk
} X1PXX!]lo[
} =9AX\2w*H;
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堆排序： W2F*+M
#XPY\n^k
package org.rut.util.algorithm.support; 7dbGUbT
?(d<n
import org.rut.util.algorithm.SortUtil; (6#, $Ze
YZyV
/** -\V!f6Q
* @author treeroot ,`O.0e4pn
* @since 2006-2-2 QpZCU]
* @version 1.0 dF<GuS;l5
*/ --chU5
public class HeapSort implements SortUtil.Sort{ +1o4l i
T>2_r6;
/* (non-Javadoc) `8sC>)lrwu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]d]rV `RF
*/ 3q*p#l~
public void sort(int[] data) { Uop`)
MaxHeap h=new MaxHeap(); sOUQd-!"
h.init(data); nWz7$O
for(int i=0;i h.remove(); ;S.o`z1GI
System.arraycopy(h.queue,1,data,0,data.length); oDBv5
} +zf[Im%E
GLE/ 1
private static class MaxHeap{ b>Em~NMu_
/_l$h_{DH
void init(int[] data){ AkE(I16Uy~
this.queue=new int[data.length+1]; bs9X4n5
for(int i=0;i queue[++size]=data; ?|NMJQsa7
fixUp(size); GI _.[
} }s++^uX6
} e"O c
<*F!A' w2o
private int size=0; v%$c_'d
a*(,ydF|L
private int[] queue; {|D7H=f
8%EauwAx
public int get() { ]u<8jr
return queue[1]; )~[rb<:)b
} :qe.*\ c
BDiN*.w5
public void remove() { EwX:^1f
SortUtil.swap(queue,1,size--); VkJBqRzBOa
fixDown(1); JKy06I
} f5o##ia7:
file://fixdown @D@_PA)e(
private void fixDown(int k) { cy @",z
int j; %-J}m
while ((j = k << 1) <= size) { ;:A/WU.^
if (j < size %26amp;%26amp; queue[j] j++; 3s B9t X
if (queue[k]>queue[j]) file://不用交换 VSLi{=#
break; k|D =Q
SortUtil.swap(queue,j,k); ,|G~PC8
k = j; I:Q3r"1
} cfhiZ~."T
} !l5&>1?
private void fixUp(int k) { '}BYMEd/m%
while (k > 1) { N,ysv/zq7
int j = k >> 1; -4!S?rHwd+
if (queue[j]>queue[k]) Nm4 h
break; NPjNkpWm&=
SortUtil.swap(queue,j,k); }$X/HK
k = j; &X&msEM
} ;U<}2M!g
} cl1>S3
Or<OmxJg
} oj%(@6L
GX0S9s
} K$kI%eGZA
:xy4JRcF
SortUtil： `*-rz<G
mGP&NOR0^y
package org.rut.util.algorithm; >\4"k4d}
R8N*. [
import org.rut.util.algorithm.support.BubbleSort; Of.%rpgy
import org.rut.util.algorithm.support.HeapSort; bBg=X}9
import org.rut.util.algorithm.support.ImprovedMergeSort; 7Q>bJ Ek7
import org.rut.util.algorithm.support.ImprovedQuickSort; _?rL7oTv
import org.rut.util.algorithm.support.InsertSort; 94Q?)0W$
import org.rut.util.algorithm.support.MergeSort; *w5xC5*
import org.rut.util.algorithm.support.QuickSort; *wp>a?sG\
import org.rut.util.algorithm.support.SelectionSort; _Y _v&
import org.rut.util.algorithm.support.ShellSort; C2(VYw
wzf%~ats
/** L<W2a(
* @author treeroot &<oJw TC
* @since 2006-2-2 ywY[g{4+
* @version 1.0 |!hN!j*)
*/ + C'<*
public class SortUtil { Lm1 -
public final static int INSERT = 1; ESi'3mbeC
public final static int BUBBLE = 2; /Xf_b.ZM&
public final static int SELECTION = 3; #fT<]j(
public final static int SHELL = 4; zTS P8Q7
public final static int QUICK = 5; hmp!|Q[)
public final static int IMPROVED_QUICK = 6; *iiyU}x
public final static int MERGE = 7; /5N`Euw
public final static int IMPROVED_MERGE = 8; p,K!'\
public final static int HEAP = 9; JDP/vNq
(,^jgv|I
public static void sort(int[] data) { `BzjDI:a
sort(data, IMPROVED_QUICK); _;'<}a
} hF`Qs
private static String[] name={ K'U8ft*_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2}0S%R(
}; /vNHb_-
hp3 <HUU
private static Sort[] impl=new Sort[]{ hOj(*7__
new InsertSort(), O/Mx$Q3re
new BubbleSort(), JyDg=%-$2
new SelectionSort(), V)jF]u~g
new ShellSort(), E'+?7ZGWj
new QuickSort(), Zonr/sA~
new ImprovedQuickSort(), Xv2Q8-}w
new MergeSort(), 8>AST,
new ImprovedMergeSort(), V(wANvH
new HeapSort() 'dJ(x
}; 0HPqoen$
bwyj[:6l
public static String toString(int algorithm){ lN~u='Kc
return name[algorithm-1]; pE381Cw
} nA#N,^Rr
<`")Zxf+
public static void sort(int[] data, int algorithm) { &`I7aP|
impl[algorithm-1].sort(data); ]=]fIKd
} 3A!Qu$r9
R "qt}4m
public static interface Sort { H6Q!~o\"H
public void sort(int[] data); K+3+?oYKH
} }e]tn)
|32uC3?o
public static void swap(int[] data, int i, int j) { 2g HRfTF
int temp = data; YckLz01jh
data = data[j]; )R6-]TkA_
data[j] = temp; $0&<Jx
} l]~mB~
} 71G\b|5