[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; ;Ly4Z*!2
} 5@0c@Q
int i1=l; vnN_csJ#^
int i2=mid+1; #m$H'O[WG\
for(int cur=l;cur<=r;cur++){ N.64aL|1
if(i1==mid+1) ,7j`5iq[m
data[cur]=temp[i2++]; +vU.#C_2
else if(i2>r) 8U;!1!+ 7)
data[cur]=temp[i1++]; @W.`'b-
else if(temp[i1] data[cur]=temp[i1++]; iGhapD
else Y\op9Fw
data[cur]=temp[i2++]; 4k#B5^iJ
} W2<X 5'
} PN.6BJvu
_p_F v>>:
} KDXo9FzF
D>|:f-Z6Z
改进后的归并排序: &>s(f-\8
JQtH},Tr
package org.rut.util.algorithm.support; TM"-X\e~{
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import org.rut.util.algorithm.SortUtil; zu^ AkMc
^M80 F7
/** /C(L(X
* @author treeroot c^bA]l^a
* @since 2006-2-2 cYp}$
* @version 1.0 @i`gR%
*/ t{7l.>kf
public class ImprovedMergeSort implements SortUtil.Sort { l,X;<&-[
Gg!))I+
private static final int THRESHOLD = 10; %b*%'#iK
xv*mK1e
/* i]YQq!B
* (non-Javadoc) V\G>e{
* ^s?wnEo;j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x$Dv&4
*/ [qXpi'q[
public void sort(int[] data) { c !;wp,c
int[] temp=new int[data.length]; ew"Fr1UGYZ
mergeSort(data,temp,0,data.length-1); UP`q6]P
} ryT8*}o
E??%)q
private void mergeSort(int[] data, int[] temp, int l, int r) { %*gO<U4L]
int i, j, k; w %zw+E
int mid = (l + r) / 2; [D,:=p`
if (l == r) MvW>ktkU
return; - VE#:&
if ((mid - l) >= THRESHOLD) Qnw$=L:
mergeSort(data, temp, l, mid); };j&)M
else iWCV(!
insertSort(data, l, mid - l + 1); q)~qd$yMS
if ((r - mid) > THRESHOLD) }ot _k-
mergeSort(data, temp, mid + 1, r); 35>}$1?-6
else K$ &wO.
insertSort(data, mid + 1, r - mid); @Dy.HQ~
xHGoCFB
for (i = l; i <= mid; i++) { d"78:+
temp = data; &8pXkD#A
} W<4\4
for (j = 1; j <= r - mid; j++) { O)Qz$
temp[r - j + 1] = data[j + mid]; ]/bE${W*]
} e?YbG.(E9
int a = temp[l]; bxN;"{>Xz
int b = temp[r]; 3wE8y&
for (i = l, j = r, k = l; k <= r; k++) { M BT-L
if (a < b) { </X"*G't
data[k] = temp[i++]; 9X%Klm 5w
a = temp; W'jXIO
} else { .ndQ(B
data[k] = temp[j--]; [FL I+;gY
b = temp[j]; R u5&xIQ
} mc'p-orAf
} ~Hs{(7
} %Let AR
Q.1ohj0)
/** qJA.+q.e$e
* @param data nrIL_
* @param l &w0=/G/T=~
* @param i e{;e
*/ {9".o,
private void insertSort(int[] data, int start, int len) { f>dkT'4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IFxI>6<&
} "^z=r]<5
} At(9)6n8
} QNXxpoS#
} B:~;7A\
mj=|oIMwT
堆排序： YZRB4T9
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package org.rut.util.algorithm.support; XL^N5
4P!DrOB
import org.rut.util.algorithm.SortUtil; ]Rh(=bg
7[BL 1HI*
/** yrAzD=
* @author treeroot Uob|Q=MQ
* @since 2006-2-2 i@5%d!J
* @version 1.0 +[/47uFbI
*/ _a$DY,;
public class HeapSort implements SortUtil.Sort{ *"FLkC4
%J7mZB9
/* (non-Javadoc) WgJAr73 l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <C%-IZv$
*/ 8$ZSF92C
public void sort(int[] data) { !9xANSb
MaxHeap h=new MaxHeap(); ^r*%BUU9]%
h.init(data); yM:~{;HLF
for(int i=0;i h.remove(); QX.6~*m1
System.arraycopy(h.queue,1,data,0,data.length); *}ee"eHs
} AH'4H."o/9
^>8]3@ Nh
private static class MaxHeap{ /lB0>Us
WG/J4H`Od
void init(int[] data){ C6UMc} 9h
this.queue=new int[data.length+1]; ;[%}Xx
for(int i=0;i queue[++size]=data; qzt2j\v
fixUp(size); RyOT[J
} nP\V1pgA
} 8o7]XZE=)
=j+oKGkoCa
private int size=0; 9LO.8Jy
M1]6lg[si
private int[] queue; _Sgk^i3v
{IPn\Bka
public int get() { s i"`
return queue[1]; e*2&s5 #RT
} G:c8`*5Q
qIGu#zXW
public void remove() { R^yZG{?t
SortUtil.swap(queue,1,size--); >}DjHLTW\
fixDown(1); FK@ f'
} Uty(sDtu
file://fixdown O<dZA=Oez
private void fixDown(int k) { AO}i@YJth
int j; w <#*O:
while ((j = k << 1) <= size) { ?$J7%I@
if (j < size %26amp;%26amp; queue[j] j++; 3W-NS~y
if (queue[k]>queue[j]) file://不用交换 9IvcKzS2
break; tC?Aso
SortUtil.swap(queue,j,k); Lk`k>Nn)
k = j; zh^jWu
} >2lAy:B5
} yF/< :
private void fixUp(int k) { N{^>MRK=5
while (k > 1) { W7*_T]
int j = k >> 1; )7I.N]=
if (queue[j]>queue[k]) 9uw,-0*5
break; pY)j0tdd
SortUtil.swap(queue,j,k); F9k I'<Q
k = j; g<2lPH
} TOco({/_/
} 7~kpRa@\P
yZ;k@t_WRD
} KkdG.c'
xH"W}-#[
} y\)G7 (
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SortUtil： PTzp;.
.*EOVo9S
package org.rut.util.algorithm; ZVdsxo<
(:.Q\!aZ1
import org.rut.util.algorithm.support.BubbleSort; iHE0N6%q
import org.rut.util.algorithm.support.HeapSort; POqRHuFq
import org.rut.util.algorithm.support.ImprovedMergeSort; $Yx6#m}[M
import org.rut.util.algorithm.support.ImprovedQuickSort; 'R4>CZ%jV
import org.rut.util.algorithm.support.InsertSort; RwAbIXG{0
import org.rut.util.algorithm.support.MergeSort; _.d}lK3$2
import org.rut.util.algorithm.support.QuickSort; r/CEYEJ&X
import org.rut.util.algorithm.support.SelectionSort; t$]&,ucW#
import org.rut.util.algorithm.support.ShellSort; )Lc<;=w'9
;[TljcbS
/** ).0V%}>
* @author treeroot JCw{ ?^F"
* @since 2006-2-2 1<LC8?wt
* @version 1.0 {yvb$ND|j{
*/ -H1"OJ2aF
public class SortUtil { pu/m8
public final static int INSERT = 1; v!<PDw2'
public final static int BUBBLE = 2; M1AZ}bc0]
public final static int SELECTION = 3; \6`v.B&v
public final static int SHELL = 4; js:C mnI
public final static int QUICK = 5; 6QN1+MwB
public final static int IMPROVED_QUICK = 6; *.kj]BoO
public final static int MERGE = 7; l `fW{lh
public final static int IMPROVED_MERGE = 8; KWFyw>*)
public final static int HEAP = 9; k~0#'I9
cT/3yf
public static void sort(int[] data) { BN+V,W
sort(data, IMPROVED_QUICK); -Bo86t)F
} wzD\8_;6N
private static String[] name={ !"g=&Uy&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "DVt3E
}; ixOEdQ
yB-.sGu
private static Sort[] impl=new Sort[]{ e{,!|LhpQ
new InsertSort(), "#*Nnt
new BubbleSort(), :&Qb>PH[
new SelectionSort(), !+m@AQ:,
new ShellSort(), |WB"=PE
new QuickSort(), 3H1Pp*PH
new ImprovedQuickSort(), uVN.=
new MergeSort(), 'eqiYY|
new ImprovedMergeSort(), riID,aut
new HeapSort() {UP'tXah
}; E::L?#V
<e'P%tG'
public static String toString(int algorithm){ ?#?e(mpo
return name[algorithm-1]; fCLcU@3W?
} 'KSa8;:=C
V?=TVI*k
public static void sort(int[] data, int algorithm) { CNut{4
impl[algorithm-1].sort(data); <#>Oy&E
} ;U |NmC+
[1NaH
public static interface Sort { 0[.3Es:_
public void sort(int[] data); *]5z^> q;7
} xFOBF")
])C>\@c6Gm
public static void swap(int[] data, int i, int j) { for{
int temp = data; @\ }sb]
data = data[j]; Z #EvRC
data[j] = temp; -)X{n?i
} "r@G@pe
} J=):+F=