[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; L6fc_Mo.EE
} ?a+tL'D[
int i1=l; }:5AB93(
int i2=mid+1; 82WXgB>
for(int cur=l;cur<=r;cur++){ ZqsI\"bj
if(i1==mid+1) BSY2\AL p
data[cur]=temp[i2++]; :[3{-.c
else if(i2>r) \Azl6`Em
data[cur]=temp[i1++]; ,a9<\bd)
else if(temp[i1] data[cur]=temp[i1++]; 0(iTnzx0
else OW<i"?0
data[cur]=temp[i2++]; 4&~ft
} -ve{O-;
} t,4q]Jt
'j6PL;~c
} 2-Y%W(bEzs
XO~xbG7>gZ
改进后的归并排序: ja3wXz$2
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package org.rut.util.algorithm.support; +|Z1U$0g
Wky=]C%
import org.rut.util.algorithm.SortUtil; ,R5NKWo
9JV(}v5[
/** IT5AB?bxH
* @author treeroot J?&lpsB3_l
* @since 2006-2-2 TK<~(Dk
* @version 1.0 *|h-iA+9
*/ F2WUG
public class ImprovedMergeSort implements SortUtil.Sort { |v#N
Mt(wy%{zK
private static final int THRESHOLD = 10; Gnop
]#]|]>& <
/* dtw1Am#Ci
* (non-Javadoc) HUiW#x%;
* u1s^AW8 y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fEf",{I
*/ >H?l[*9
public void sort(int[] data) { Wly-z$\
int[] temp=new int[data.length]; gO_{(\w*
mergeSort(data,temp,0,data.length-1); -fFM-gt^t
} ,rVm81-2
"v@$CR9<T
private void mergeSort(int[] data, int[] temp, int l, int r) { zc>/1>?M
int i, j, k; 0l#gS;
int mid = (l + r) / 2; <ek_n;R
if (l == r) iD+Q\l;%
return; cf)2GoV>e
if ((mid - l) >= THRESHOLD) ^Lr)STh
mergeSort(data, temp, l, mid); 8gwJ%"-K
else 12BTZ
insertSort(data, l, mid - l + 1); Se7NF@>9_
if ((r - mid) > THRESHOLD) l&2A]5C
mergeSort(data, temp, mid + 1, r); $BKGPGmh
else [<`K%1GQ
insertSort(data, mid + 1, r - mid); ]4wyuP,up
G&$+8r
for (i = l; i <= mid; i++) { LDqq'}qK6
temp = data; -jy-KC
} n*~=O'
for (j = 1; j <= r - mid; j++) { %>B?WR\yE
temp[r - j + 1] = data[j + mid]; vn<z\wVbf
} ,{P*ZK3u
int a = temp[l]; ?n<b:oO
int b = temp[r]; Ex2TV7I
for (i = l, j = r, k = l; k <= r; k++) { ]7" W(
if (a < b) { AB<|iJC
data[k] = temp[i++]; t"Ok-!c|
a = temp; !dQG 5v
} else { .O!JI"?
data[k] = temp[j--]; [mX/]31
b = temp[j]; B@g 0QgA
} ~?i;~S
} WBT/;),}:
} h.CbOI%Q
R!IODXP=
/** 1%~yb Q
* @param data G?$|aQ0j
* @param l ;mH O#
* @param i :L gFd
*/ >xQgCOi
private void insertSort(int[] data, int start, int len) { L&V;Xvbu%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :{@&5KQ8)
} T\7z87Q
} 2z9\p%MX
} `B6~KZ
} /Y$UJt
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堆排序： faQ}J%a
rMRM*`Q2
package org.rut.util.algorithm.support; 8xs}neDg*
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import org.rut.util.algorithm.SortUtil; M^^5JNY
&)`xlIw}
/** PwP;+R};|
* @author treeroot So>P)d$8+
* @since 2006-2-2 A9Cq(L_H
* @version 1.0 htC~BK3(
*/ l&3f<e
public class HeapSort implements SortUtil.Sort{ 2ghTAsUx9
Q72}V9I9
/* (non-Javadoc) ]D(!ua5|x`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WAr;g?Q8
*/ )~/;Xl#b-
public void sort(int[] data) { wdS4iQD
MaxHeap h=new MaxHeap(); :`('lrq
h.init(data); 1k-YeQNe
for(int i=0;i h.remove(); hP1}Do
System.arraycopy(h.queue,1,data,0,data.length); pxm{?eBz
} cp D=9k!*K
(-k`|X"
private static class MaxHeap{ >6fc`3*!
mocR_3=Q?
void init(int[] data){ "^sh:{
this.queue=new int[data.length+1]; Py^ _::
for(int i=0;i queue[++size]=data; <}e2\x
fixUp(size); Ik{[BRzUgt
} h SGI
} "},0Cs
c6 O1Z\M@\
private int size=0; 5:3%RTLG
QuG=am?l`
private int[] queue; 0 #*M'C#
%:61@<
public int get() { "S8JHHx
return queue[1]; fP|rD[
} Po+I!TL'
}M3f ?Jv
public void remove() { ZR|)+W;
SortUtil.swap(queue,1,size--); h7],/? s
fixDown(1); kR+xInDM*
} w8MQA!=l
file://fixdown NBLiwL37{
private void fixDown(int k) { c?@WNv
int j; jC<1bf$K
while ((j = k << 1) <= size) { $U3|.4
if (j < size %26amp;%26amp; queue[j] j++; wUUDq?!k\
if (queue[k]>queue[j]) file://不用交换 =m<; Jx5
break; PwF 1Pr`r
SortUtil.swap(queue,j,k); &/%A 9R,
k = j; f?KHp|
} +w'"N
} Cxn<#Kf\-<
private void fixUp(int k) { e_eNtVq
while (k > 1) { !Q-h#']~L
int j = k >> 1; w$ zX.;s
if (queue[j]>queue[k]) qG=?+em
break; U<T.o0s=
SortUtil.swap(queue,j,k); i}fAjS:W
k = j; to}g4
} |I; tBqN{u
} ^,P# <,D,
$P=B66t ^
} bfjC:"!H
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} B=EI&+F+
,r=9$i_
SortUtil： nFRU-D$7
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package org.rut.util.algorithm; dA)JR"r2
pQQN8Y~^Y
import org.rut.util.algorithm.support.BubbleSort; *=sMJY9#jE
import org.rut.util.algorithm.support.HeapSort; dC&OjBQ
import org.rut.util.algorithm.support.ImprovedMergeSort; {B!LhvYAH
import org.rut.util.algorithm.support.ImprovedQuickSort; GJu[af
import org.rut.util.algorithm.support.InsertSort; F&tU^(7<
import org.rut.util.algorithm.support.MergeSort; 8OS@gpz
import org.rut.util.algorithm.support.QuickSort; :i{Svb*_'
import org.rut.util.algorithm.support.SelectionSort; [`F}<L."
import org.rut.util.algorithm.support.ShellSort; .Yw
#8Bs15aV
/** cO8':P5Q
* @author treeroot )bd)noZi
* @since 2006-2-2 -Kas9\VWEw
* @version 1.0 tzTnFV
*/ 65%WjO
public class SortUtil { j_(DH2D
public final static int INSERT = 1; r<%ua6@
public final static int BUBBLE = 2; vz$_Fgsc.
public final static int SELECTION = 3; +:IwP
public final static int SHELL = 4; KQf=t0Z=Ce
public final static int QUICK = 5; d@0p<at>~
public final static int IMPROVED_QUICK = 6; }Wk^7[Y
public final static int MERGE = 7; TR<M3,RG#%
public final static int IMPROVED_MERGE = 8; z[cs/x
public final static int HEAP = 9; Jbv[Ql#
5 O't-'
public static void sort(int[] data) { 3P.v#TEst
sort(data, IMPROVED_QUICK); vcmB)P-T`O
} Nf]h8d~
private static String[] name={ FI(iqSJ6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @TQzF-%#7
}; H@'f=Y*D
wv7XhY}
private static Sort[] impl=new Sort[]{ Uhw:XV@m
new InsertSort(), ? PI2X.6
new BubbleSort(), 8|"26UwD/
new SelectionSort(), sTSNu+
new ShellSort(), *QGyF`Go{
new QuickSort(), svaclkT=
new ImprovedQuickSort(), XkEJ_;:
new MergeSort(), W"v"mjYud
new ImprovedMergeSort(), T2dv!}7p
new HeapSort() Gp9:#L!
}; zR!p-7_w
xU!eT'Y
public static String toString(int algorithm){ .N>Th/K8
return name[algorithm-1]; d7]~t|
} E]0}&YG
X{u\|e{
public static void sort(int[] data, int algorithm) { >Y6iLQ$X
impl[algorithm-1].sort(data); Ncr*F^J4
} R_zQiSwG<
a;h.I}*]
public static interface Sort { ^2a63_
public void sort(int[] data); vveL|j
} BW x=Q
\|YIuzlO4
public static void swap(int[] data, int i, int j) { SMn(c
int temp = data; '/'dg5bfV
data = data[j]; -(lCM/h
data[j] = temp; 4de:hE
} i@L_[d^|j`
} w(oi6kg