[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; QU{|S.\
} b5NPG N
int i1=l; >LS*G qjq
int i2=mid+1; ;iEr+
for(int cur=l;cur<=r;cur++){ U(*k:Fw
if(i1==mid+1) kB:6e7D|[
data[cur]=temp[i2++]; 2?J[D7
else if(i2>r) T-S6`^_L
data[cur]=temp[i1++]; Qv4g#jX{
else if(temp[i1] data[cur]=temp[i1++]; D_VAtz
else *c<0cHv*
data[cur]=temp[i2++]; *PEk+e
} 0@ccXFE
} 4K{<R!2I
1HPYW7jk@"
} <e)5$Aj
<?h`
改进后的归并排序: (^,4{;YQ5
u6tD5Y
package org.rut.util.algorithm.support; !5FZxmUup
;]/>n:[E
import org.rut.util.algorithm.SortUtil; "kHFt|%@
A|Z'\D0
/** o$disJ
* @author treeroot ?2LRMh")$
* @since 2006-2-2 TX/Ng+v S
* @version 1.0 iPoh2
*/ n^kszIu~
public class ImprovedMergeSort implements SortUtil.Sort { Y367Jr@^N
EkWipF(
private static final int THRESHOLD = 10; (x"TM),Q
`*Ar6
/* xweV8k/
* (non-Javadoc) "lU%Pm]>
* |^ K"#K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [,_4#Zz
*/ b3$aPwv
public void sort(int[] data) { [ QHSCF5
int[] temp=new int[data.length]; kta`[%KmIZ
mergeSort(data,temp,0,data.length-1); F^knlv'
} YTWlR]Tr6?
z^xrB$8 u
private void mergeSort(int[] data, int[] temp, int l, int r) { cU`sA_f
int i, j, k; n+Bh-aV
int mid = (l + r) / 2; [ vWcQ6m
if (l == r) gt~hUwL
return; _DlkTi5(w
if ((mid - l) >= THRESHOLD) AL(YQ)-Cg
mergeSort(data, temp, l, mid); %(72+B70R
else <0?h$hf4c
insertSort(data, l, mid - l + 1); 7J:zIC$u>
if ((r - mid) > THRESHOLD) @#wBK3Ut^
mergeSort(data, temp, mid + 1, r); Tno[LP,
else kaK0'l2%
insertSort(data, mid + 1, r - mid); 7soiy A
9t`
for (i = l; i <= mid; i++) { Xn<~ln
temp = data; #:C?:RMS
} {OK+d#=
for (j = 1; j <= r - mid; j++) { ^&nC)T<w
temp[r - j + 1] = data[j + mid]; : 5=E>!
} X}!r4<;(
int a = temp[l]; !sbKJ+V7
int b = temp[r]; s*blZdP
for (i = l, j = r, k = l; k <= r; k++) { HkgmZw,
if (a < b) { X^pxu6nm-
data[k] = temp[i++]; ,VtrQb)Yf
a = temp; oSDx9%
} else { Uwd^%x*
data[k] = temp[j--]; =v(MdjwFl
b = temp[j]; ^4D7sS;~3
} v\LcZt`}
} m@qM|%(0x
} Qf?5"=:#
KZK9|121
/** )T4%}$(
* @param data lP9XqQ(
* @param l iymOq9
* @param i JjH#,@'.
*/ |(mr&7O
private void insertSort(int[] data, int start, int len) { IYJS>G%*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J?Y1G<&
} t")+L{
} %&D,|Yl6
} Cpyv@+;D
} hJ)>BeH0
HLjXH#ry
堆排序： n9qO;X4&
ppwjr +
package org.rut.util.algorithm.support; Y6_%HYI$
< C{-ph
import org.rut.util.algorithm.SortUtil; MT`gCvoF4P
a,B2;4"
/** )+'De
* @author treeroot c^N'g!on
* @since 2006-2-2 }]8n3&*
* @version 1.0 2!6+>nvO
*/ 0zSRk]i.f
public class HeapSort implements SortUtil.Sort{ dr25;L? B
FW?zJ
/* (non-Javadoc) QFg,pTj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )p,uZ`~v
*/ *6Ojv- G|5
public void sort(int[] data) { bp'qrcFuiL
MaxHeap h=new MaxHeap(); (WW*yv.J
h.init(data); >g):xi3qK
for(int i=0;i h.remove(); aY/msplC
System.arraycopy(h.queue,1,data,0,data.length); $~#N1
} 994
."N`X\
private static class MaxHeap{ KJ7[DN'(
me-:A:si
void init(int[] data){ /3MTutM|<X
this.queue=new int[data.length+1]; lnXb]tm;
for(int i=0;i queue[++size]=data; pt"yJtM'P
fixUp(size); r*-e~
} mp^;8??;
} @uIY+_E40g
A578g
private int size=0; 1l@gZI12#/
U#o5(mK
private int[] queue; ?dWfupO{
$On
public int get() { /}_OCuJJ,
return queue[1]; %?o@YwBo^E
} /F>\-
<tT*.nM\
public void remove() { -3YsrcJi
SortUtil.swap(queue,1,size--); |sM#nhxK
fixDown(1); amPC C
} Hk65c0
file://fixdown c*O{?b
private void fixDown(int k) { X>i`z
int j; Ch`nDIne
while ((j = k << 1) <= size) { 0YMmWxV
if (j < size %26amp;%26amp; queue[j] j++; vV2px
if (queue[k]>queue[j]) file://不用交换 aFI?^"L
break; ,bv?c@
SortUtil.swap(queue,j,k); 3 cd5g
k = j; d+9T}? T:*
} R]oi&"H@r)
} Q?Au.q],
private void fixUp(int k) { l\vvM>#S
while (k > 1) { njz:7]>e
int j = k >> 1; "IOu$?
if (queue[j]>queue[k]) j( *;W}*^
break; z0@)@4z!
SortUtil.swap(queue,j,k); In-W,
k = j; 9fWr{fx
} N9W\>hKaeh
} ELx?ph-9
m?Gb5=qo
} !&~8j7{
?V6+o`bm
} QlbhQkn
G4!$48
SortUtil： (#w8/@JxF
J- %YmUc)
package org.rut.util.algorithm; UOWOOdWSB
*{5L*\AZ
import org.rut.util.algorithm.support.BubbleSort; X%+FM]
import org.rut.util.algorithm.support.HeapSort; $,vZX u|Qw
import org.rut.util.algorithm.support.ImprovedMergeSort; {H$F!}a
import org.rut.util.algorithm.support.ImprovedQuickSort; !fFmQ\|)4S
import org.rut.util.algorithm.support.InsertSort; )~hsd+ 0t
import org.rut.util.algorithm.support.MergeSort; !Ua74C
import org.rut.util.algorithm.support.QuickSort; R~-r8dWcw
import org.rut.util.algorithm.support.SelectionSort; "HWl7c3q
import org.rut.util.algorithm.support.ShellSort; e`1,jt'
%cM2;a=2
/** X@,xwsM%tb
* @author treeroot Sb&sW?M
* @since 2006-2-2 xg'FC/1LD
* @version 1.0 T=8>0D^v5
*/ ulnG|3A9
public class SortUtil { RI#Cr+/
public final static int INSERT = 1; 4|+6a6
public final static int BUBBLE = 2; D`r^2(WW
public final static int SELECTION = 3; a8?Zb^
public final static int SHELL = 4; /2,s-^
public final static int QUICK = 5; sje}E+{[
public final static int IMPROVED_QUICK = 6; E%g_O_
public final static int MERGE = 7; 'ADaz75`*r
public final static int IMPROVED_MERGE = 8; E'p5
public final static int HEAP = 9; cmQLkT"#K
9R XT
public static void sort(int[] data) { /rd6p{F
sort(data, IMPROVED_QUICK); ~rBeJZ
} (7nWv43
private static String[] name={ &A=q_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _ ?f~UvK
}; U!@3['
]Y|Y?
private static Sort[] impl=new Sort[]{ M) 9Ss
new InsertSort(), RRaGc )B
new BubbleSort(), {nH. _
new SelectionSort(), JGaS`fKSk
new ShellSort(), Sr_]R<?
new QuickSort(), y8U|A0@$`
new ImprovedQuickSort(), *Z7W'-
new MergeSort(), &~ g||rq
new ImprovedMergeSort(), CtbmX)vE
new HeapSort() ;9,<&fe
}; ;0V{^
XVi?-/2
public static String toString(int algorithm){ X*F#=.lh
return name[algorithm-1]; ]Mv.Rul?~
} I71kFtvcy*
]A;zY%>
public static void sort(int[] data, int algorithm) { 4ze-N8<[
impl[algorithm-1].sort(data); =K#D^c~
} mA5xke_)
^s25z=^t
public static interface Sort { 9:^SnHAa
public void sort(int[] data); /nEh,<Y)
} #vJDb |z
a;AvY O
public static void swap(int[] data, int i, int j) { MD~03
int temp = data; gIS<"smOo
data = data[j]; }q-_|(b;
data[j] = temp; WpX)[au
} EfY|S3Av
} m#+0uZm(