[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; c#]4awHU
} 3&4(ZH=
int i1=l; E=Bf1/c\
int i2=mid+1; `[yKFa I
for(int cur=l;cur<=r;cur++){ "{xrL4BtC
if(i1==mid+1) 'oVx#w^mf
data[cur]=temp[i2++]; 3M`M
else if(i2>r) ^ +\dz
data[cur]=temp[i1++]; ?UR0:f:}oc
else if(temp[i1] data[cur]=temp[i1++]; R w\gTo
else E&w7GZNt
data[cur]=temp[i2++]; _61gF[r4!Y
} |-ALklXr
} $HzBD.CF|x
K5 z<3+
} DCa^ u'f
3,w_".m`#
改进后的归并排序: j;r-NCBnz
4J?0bZ
package org.rut.util.algorithm.support; >y>5#[M!
&-w Cvp7
import org.rut.util.algorithm.SortUtil; Jpq~
pki%vRY
/** fOrH$?
* @author treeroot :-Z2:/P
* @since 2006-2-2 2,F.$X
* @version 1.0 6MW{,N
*/ ~~P5k:
public class ImprovedMergeSort implements SortUtil.Sort { (CL%>5V
0+ '&`Q!u
private static final int THRESHOLD = 10; -2[a2^a'
>=>2m2z=
/* b|DdG/O
* (non-Javadoc) +sA2WK]
* *^4"5X@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :Yl-w-oe
*/ q;CiV
public void sort(int[] data) { *fxG?}YT
int[] temp=new int[data.length]; L*+@>3mu)
mergeSort(data,temp,0,data.length-1); )&O %*@F
} F>l] 9!P|m
EVSX.'&f
private void mergeSort(int[] data, int[] temp, int l, int r) { ND;#7/$>
int i, j, k; {tZ.v@
int mid = (l + r) / 2; ki!0^t:9
if (l == r) [q-h|m
return; <'*LRd$1
if ((mid - l) >= THRESHOLD) Gd=RyoJl
mergeSort(data, temp, l, mid); 2ilQXy
else Hn"RH1Zy
insertSort(data, l, mid - l + 1); r19 pZAc
if ((r - mid) > THRESHOLD) t~XN}gMxw
mergeSort(data, temp, mid + 1, r); `^&OF uee
else PZ9I`P!C
insertSort(data, mid + 1, r - mid); T8g$uFo
6_Y,eL]"
for (i = l; i <= mid; i++) { L4HI0Mx
temp = data; ZE}}W_
} ~>|ziHx
for (j = 1; j <= r - mid; j++) { Rm( "=(
temp[r - j + 1] = data[j + mid]; bAMdI 5Zk?
} y)@wjH{6
int a = temp[l]; C6PdDRf
int b = temp[r]; 0l6.<-f{
for (i = l, j = r, k = l; k <= r; k++) { Gc|idjW4
if (a < b) { [W&T(%(W-
data[k] = temp[i++]; 0H:X3y+
a = temp; ;Y, y4{H3
} else { 4WB0Pt{
data[k] = temp[j--]; /N{*"s2)
b = temp[j]; 9'B `]/L
} `c$V$/IT
} 9*M,R,y
} guR/\z$D@C
75lA%| *X
/** !nnC3y{G
* @param data 6gDN`e,@
* @param l ^2rN>k,?
* @param i tw@X> G1z
*/ 9(Xn>G'iT
private void insertSort(int[] data, int start, int len) { 8s@3hXD&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %|oym.-I6
} m&3xJuKih
} d=/F}yP~?s
} %cn<ych G
} ;^L(^Hx
-9?]IIVb
堆排序： HoAy_7-5
5^Zg>I
package org.rut.util.algorithm.support; y~V(aih}D
8Zdn,}Z
import org.rut.util.algorithm.SortUtil; UiNP3TJ'L
|-H&o]
/** EU#^7
* @author treeroot |.dRily+
* @since 2006-2-2 7tp36TE
* @version 1.0 U<XG{<2
*/ *4 n)
public class HeapSort implements SortUtil.Sort{ pgo$61
#-J>NWdt
/* (non-Javadoc) eMzk3eOJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I/N *gy?*
*/ LP=)~K<
public void sort(int[] data) { (@YG~0
MaxHeap h=new MaxHeap(); wd6owr
h.init(data); k?}Zg*
for(int i=0;i h.remove(); ?JUeuNs9
System.arraycopy(h.queue,1,data,0,data.length); W g! Lfu
} l,).p
h+,@G,|D
private static class MaxHeap{ xSu >
Bbc^FHip
void init(int[] data){ 5r0YA IJ
this.queue=new int[data.length+1]; 4p wH>1
for(int i=0;i queue[++size]=data; ?7A>+EY
fixUp(size); AZ<=o
} Vvo7C!$z
} JXxwr)i
wC*X4 '
private int size=0; XPPdwTOr
A}!J$V:w]
private int[] queue; !@sUj
gM]:Ma
public int get() { 1;iUWU1@
return queue[1]; l-3~K-k<@
} {`_i`
*WZA9G#V5
public void remove() { \7_y%HR
SortUtil.swap(queue,1,size--); n"8Yv~v*2j
fixDown(1); SrJE_~i
} C#pjmT_
file://fixdown i~72bMwsA
private void fixDown(int k) { ,: ^u-b|
int j; +|f@^-
while ((j = k << 1) <= size) { }B^tL$k
if (j < size %26amp;%26amp; queue[j] j++; 8CE = 4
if (queue[k]>queue[j]) file://不用交换 6~+emlD
break; 'fW-Y!k%
SortUtil.swap(queue,j,k); xx $cnG
k = j; @+DX.9
} l"]V6!-U
} MOC/KNb
private void fixUp(int k) { SfR%s8c`
while (k > 1) { r|Z{-*`
int j = k >> 1; ?4uL-z](V
if (queue[j]>queue[k]) sRfcF`7
break; <naz+QK'
SortUtil.swap(queue,j,k); ;a3}~s
k = j; q\)-BXw:
} DNi+"[~&P
} lxi<F
,,TnIouy
} Z:gyz$9w
P2Y^d#jO
} Y*hCMy;
6:2vP NF
SortUtil： [-&Zl(9&
\NC3'G:Ii
package org.rut.util.algorithm; 2rMpgV5
V.Mry`9-
import org.rut.util.algorithm.support.BubbleSort; GthYzd:'hJ
import org.rut.util.algorithm.support.HeapSort; Pz^544\~ou
import org.rut.util.algorithm.support.ImprovedMergeSort; .V*^|UXbHi
import org.rut.util.algorithm.support.ImprovedQuickSort; D{!IW!w
import org.rut.util.algorithm.support.InsertSort; ^}r1;W?n
import org.rut.util.algorithm.support.MergeSort; PW4q~rc=:
import org.rut.util.algorithm.support.QuickSort; _*zt=zn>
import org.rut.util.algorithm.support.SelectionSort; Js;h%
import org.rut.util.algorithm.support.ShellSort; g .\[o@H
<vP=zk
/** f 1d?.)
* @author treeroot 7o4\oRGV
* @since 2006-2-2 E.f%H(b
* @version 1.0 oU/5 a>9~
*/ ,vDbp?)'U
public class SortUtil { c%&>p||
public final static int INSERT = 1; `{Ul!
public final static int BUBBLE = 2; ])!*_
public final static int SELECTION = 3; `x|?&Ytmf9
public final static int SHELL = 4; (#'>(t(4
public final static int QUICK = 5; 5X+A"X ;C
public final static int IMPROVED_QUICK = 6; 9VT;ep
public final static int MERGE = 7; o}!PQ#`M
public final static int IMPROVED_MERGE = 8; h$*!8=M
public final static int HEAP = 9; W4N{S.#!
fZ. ONq
public static void sort(int[] data) { b]y2+A.n
sort(data, IMPROVED_QUICK); CWlw0X
} D]}G.v1
private static String[] name={ iB{V^ksU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]{iQ21`a-
}; ,s(,S
HV.t6@\};
private static Sort[] impl=new Sort[]{ 4z? l
new InsertSort(), nK,w]{<wG!
new BubbleSort(), SdWV3
new SelectionSort(), ys~x$
new ShellSort(), 40/Y\
new QuickSort(), "fI6Cpc
new ImprovedQuickSort(), :>*7=q=
new MergeSort(), PdCEUh\>y
new ImprovedMergeSort(), "8RSvT<W^5
new HeapSort() 2?5>o!C
}; N0lC0 N?_J
:0ep(<|;
public static String toString(int algorithm){ <m m[S
return name[algorithm-1]; {FGj]*
} ~`/V(r;o
R@0R`Zs
public static void sort(int[] data, int algorithm) { sRW<me;
impl[algorithm-1].sort(data); O}P`P'Y|'
} /,dz@
U17d>]ka
public static interface Sort { \8 ":]EU
public void sort(int[] data); aYeR{Y]
} ?(PKeq6
:+Z%; Dc
public static void swap(int[] data, int i, int j) { \lY_~*J
int temp = data; _&x%^&{
data = data[j]; Mhu*[a=;x
data[j] = temp; >7FHo-H/T
} SKtrtm
} ~?dI*BZ)]