[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; %RgCU$s[>
} c;l d
int i1=l; C.dN)?O
int i2=mid+1; P`wp`HI
for(int cur=l;cur<=r;cur++){ kBd #=J
if(i1==mid+1) T!eb=oy
data[cur]=temp[i2++]; &Mbpv)V8
else if(i2>r) #imMkvx?
data[cur]=temp[i1++]; R?g qPi-
else if(temp[i1] data[cur]=temp[i1++]; qy6zHw
else Riid,n
data[cur]=temp[i2++]; RrSo`q-h+
} C,:3z
} Oa=0d;_
TfK$tTkM
} N?0T3-/K
?1 $.^
改进后的归并排序: @qH{;
A<.`HCv2
package org.rut.util.algorithm.support; 0hK)/!Y
s<x2*yVUA
import org.rut.util.algorithm.SortUtil; ?}y?e}y*xZ
<N^2|*3
/** ipfiarT~)
* @author treeroot `WHP#z
* @since 2006-2-2 iF2/:iP
* @version 1.0 y8jk9Tv
*/ +~RiCZt
public class ImprovedMergeSort implements SortUtil.Sort { b8v?@s~
a2fV0d6*l
private static final int THRESHOLD = 10; *,!6#Z7
+9>t; Ty
/* 2w93 ~j
* (non-Javadoc) 'l2'%@E>
* :N5R.@9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -#=v~vE
*/ ,dK<2XP
public void sort(int[] data) { iO4YZ!
int[] temp=new int[data.length]; Fn4i[|W42
mergeSort(data,temp,0,data.length-1); G^J|_!.a
} \"i2E!
c*ac9Y'o
private void mergeSort(int[] data, int[] temp, int l, int r) { "1_eZ`
int i, j, k; XJTY91~R
int mid = (l + r) / 2; )2C`;\/:
if (l == r) /,A:HM>B
return; %gDMz7$~
if ((mid - l) >= THRESHOLD) ^.y}2
mergeSort(data, temp, l, mid); <hgt{b4
else iqURlI);P
insertSort(data, l, mid - l + 1); ?)k;.<6
if ((r - mid) > THRESHOLD) 0m_c43+^
mergeSort(data, temp, mid + 1, r); I:[^><?E
else K1a$ m2
insertSort(data, mid + 1, r - mid); 2ku\R7
+|MHiC
for (i = l; i <= mid; i++) { 6}A1^RB+w
temp = data; 0 3kzS ]g
} r`}')2
for (j = 1; j <= r - mid; j++) { p7}xgUxX
temp[r - j + 1] = data[j + mid]; .p&4]6
} uG@Nubdwuy
int a = temp[l]; m[,! orq
int b = temp[r]; xpt*S~
for (i = l, j = r, k = l; k <= r; k++) { 8W Mhe=[
if (a < b) { V~` ?J6
data[k] = temp[i++]; wYK-YY:Q3
a = temp; !8M]n
} else { vx /NG$
data[k] = temp[j--]; jHq.W95+P
b = temp[j]; hb'S!N5m
} &m_4#
} \&|)?'8rS
} PJLSDIeN
DYkNP:+
/** `Xvrf
* @param data [f,; +Ze
* @param l ZW n j-
* @param i JlJy3L8L
*/ +DFG762
private void insertSort(int[] data, int start, int len) { k\X1`D}R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sui3(wb
} q"4{GCavN
} <5 G+(vP
} #-kG\}
} SbI %|
rAq2
堆排序： :it52*3=
]P;Ng=a
package org.rut.util.algorithm.support; Uc]S7F#
X-O/&WRYQ
import org.rut.util.algorithm.SortUtil; W3K?K-
$-'p6^5
/** E!w%oTx{OR
* @author treeroot jFfuT9oId
* @since 2006-2-2 V(n7hpS
* @version 1.0 qB PUB(
*/ =Is.T
public class HeapSort implements SortUtil.Sort{ v:kTZB
["VUSa
/* (non-Javadoc) NrPs :`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cXu"-/
*/ 8%v1[Wi
public void sort(int[] data) { dUiv+K)ccQ
MaxHeap h=new MaxHeap(); GF[onfQY7
h.init(data); $ \0)~cy
for(int i=0;i h.remove(); X@JrfvKv[d
System.arraycopy(h.queue,1,data,0,data.length); Kk|uN#m
} n5h4]u
Lq.aM.&;#
private static class MaxHeap{ ibo{!>m
U{Xg#UN
void init(int[] data){ x TEDC,B
this.queue=new int[data.length+1]; JG-\~'9
for(int i=0;i queue[++size]=data; N9 yL(2
fixUp(size); gOaL4tu
} H;5FsKIF
} jt5en;AA[
dHjJLs_
private int size=0; WBdC}S }3t
uzjP!qO
private int[] queue; H|&[,&M>
x`/"1]Nf
public int get() { |E)-9JSRy
return queue[1]; _Eo$V&
} R]hilb'a
G`3/${ti
public void remove() { AB92R/
SortUtil.swap(queue,1,size--); b`M 2VZu
fixDown(1); $A"C1)d;
} t/xWJW2
file://fixdown w+c%Y\:
private void fixDown(int k) { ]Q-*xho
int j; <pzCpF<
while ((j = k << 1) <= size) { /~RY{ c@#L
if (j < size %26amp;%26amp; queue[j] j++; HX\^ecZ#E
if (queue[k]>queue[j]) file://不用交换 iOk^RDG+
break; %DH2]B? 0
SortUtil.swap(queue,j,k); e%_2n=p~)%
k = j; RQ}0f5~t
} 6Ap-J~4
} kOi@QLdN
private void fixUp(int k) { Hg<d%7.
while (k > 1) { VnqgN
int j = k >> 1; xx[XwN;
if (queue[j]>queue[k]) '*K}$+l
break; "tax
SortUtil.swap(queue,j,k); i#c1ZC
k = j; A#/O~-O^
} );-?~
} AG?cI@',
S+aXlb
} ;jC}.] _)w
4O}ZnE1[
} t.0F
^lADq']
SortUtil： [Aqy%mbG
:Y/>] tS4
package org.rut.util.algorithm; `<}Q4p
dV_ClH &)
import org.rut.util.algorithm.support.BubbleSort; ECq(i(
import org.rut.util.algorithm.support.HeapSort; _J' _9M?>
import org.rut.util.algorithm.support.ImprovedMergeSort; Vu6$84>-,
import org.rut.util.algorithm.support.ImprovedQuickSort; A{3VTe4TV
import org.rut.util.algorithm.support.InsertSort; 3.[ fTrzJ
import org.rut.util.algorithm.support.MergeSort; J0xV\O !e
import org.rut.util.algorithm.support.QuickSort; )?es3Ehqq
import org.rut.util.algorithm.support.SelectionSort; jhU'UAn
import org.rut.util.algorithm.support.ShellSort; Vqr#%.N
`xb\)
/** r57CyO
* @author treeroot k'H+l]=
* @since 2006-2-2 /K!&4mK
* @version 1.0 UEkn@^&bg
*/ K ?R* )_
public class SortUtil { ep|>z#1
public final static int INSERT = 1; v[-.]b*5A$
public final static int BUBBLE = 2; tb#9TF
public final static int SELECTION = 3; TV&:`kH
public final static int SHELL = 4; r1vF/yt(
public final static int QUICK = 5; T >BlnA
public final static int IMPROVED_QUICK = 6; # !:u*1
public final static int MERGE = 7; |a||oyrN
public final static int IMPROVED_MERGE = 8; 5%`fh%
public final static int HEAP = 9; e+`LtEve0
{w/{)BnPG
public static void sort(int[] data) { 8OV;&Z,x
sort(data, IMPROVED_QUICK); j6Msbq[
} #kho[`9
private static String[] name={ o|r8x_!+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gzV&S5A{_
}; _>:R]2Ew
&`]Lg?J
private static Sort[] impl=new Sort[]{ DjzHEqiH
new InsertSort(), H> Y0R
new BubbleSort(), FBDRbJ su
new SelectionSort(), F?h{IH f
new ShellSort(), ;^fGQ]`4
new QuickSort(), j.}@9
new ImprovedQuickSort(), |_fmbG
new MergeSort(), hrT!S
new ImprovedMergeSort(), hh%fmc
new HeapSort() pK_n}QW
}; Q:nBx[%
0j@nOj(3
public static String toString(int algorithm){ >d/DXv 3
return name[algorithm-1]; aHhr_.>X
} yf 7Sz$Eq
">-J+ST%
public static void sort(int[] data, int algorithm) { */8b)I}yY
impl[algorithm-1].sort(data); NFYo@kX> G
} 8:D|[u;iG
*?l-:bc]
public static interface Sort { $C&y-Hnar
public void sort(int[] data); U;PGBoe
} [SJ-]P|^l
M{!Y
public static void swap(int[] data, int i, int j) { J #ukH`|-
int temp = data; 9YMD[H\}V
data = data[j]; rzl0*CR
data[j] = temp; |{STkV]
} Rix|LKk{
} 2b&&3u8