[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; E7A!,A&>
} m]2xOR_
int i1=l; {=[>N>"
int i2=mid+1; 3^y(@XFt
for(int cur=l;cur<=r;cur++){ z lr!
if(i1==mid+1) l\s!A&L
data[cur]=temp[i2++]; 0ae8Xm3J@R
else if(i2>r) Q>%n&;:
data[cur]=temp[i1++]; [ /o'l:
else if(temp[i1] data[cur]=temp[i1++]; q;'f3Y
else |GnTRahV.
data[cur]=temp[i2++]; SQ>i:D;
} SL4?E<Jb
} qG6s.TcG
sP(+Z^/
} 5Ml=<^
HK!ecQ^+
改进后的归并排序: 6$r\p2pi0
)]1hN;Nz
package org.rut.util.algorithm.support; 6CBk=)qH
dDPQDIx
import org.rut.util.algorithm.SortUtil; _B^zm-}8|B
{.:$F3T
/** SB\%"nnV
* @author treeroot E^i]eK*"
* @since 2006-2-2 Q7865
* @version 1.0 Py)ZHML
*/ IO+]^nY`
public class ImprovedMergeSort implements SortUtil.Sort { 7QsD"rL
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private static final int THRESHOLD = 10; F_ F"3'[
So aqmY;+
/* !a@)6or
* (non-Javadoc) j!u)V1,
* L80(9Y^xn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 79h~w{IT@
*/ VPUVPq~&
public void sort(int[] data) { EA& 3rI>U)
int[] temp=new int[data.length]; UD.bb
mergeSort(data,temp,0,data.length-1); )j_El ]?
} c5YPV"X
Lzq/^&sc(
private void mergeSort(int[] data, int[] temp, int l, int r) { 8-2`S*
int i, j, k; L)sgW(@2
int mid = (l + r) / 2; ot^pxun
if (l == r) YFO{i-*q
return; 8`q7Yss6F
if ((mid - l) >= THRESHOLD) kWzN {]v
mergeSort(data, temp, l, mid); YlHP:ZW-cu
else I~GF%$-G
insertSort(data, l, mid - l + 1); &R94xh%@(
if ((r - mid) > THRESHOLD) fvkcJwkc
mergeSort(data, temp, mid + 1, r); H9cPtP~a)
else [xMa^A>p
insertSort(data, mid + 1, r - mid); fj_23{,/"g
V ;T :Q%
for (i = l; i <= mid; i++) { jj5S+ >4
temp = data; }47h0 i
} 2B,O/3y
for (j = 1; j <= r - mid; j++) { ^#/FkEt7bp
temp[r - j + 1] = data[j + mid]; r"7n2
} %Y^J''
int a = temp[l]; R?{+&r.X
int b = temp[r]; isQ(O
for (i = l, j = r, k = l; k <= r; k++) { t'qYM5
if (a < b) { rpR${%jc
data[k] = temp[i++]; "/W[gP[y%
a = temp; 4QL>LK
} else { *r7vDc
data[k] = temp[j--]; zKJ2~=
b = temp[j]; =&HLz 7|
} tdy2ZPVtTV
} gAqK)@8-
} #~u0R>=
LFp "Waiv
/** V2MOD{Maat
* @param data W'lqNOX[v
* @param l * QgKo$IF
* @param i yK~=6^M
*/ iGN\ >m}
private void insertSort(int[] data, int start, int len) { _fGTTw(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cnv>&6a)
} ZO0 Ee1/
} %,$n^{v
} K5""%O+
} {z#2gc'Q
#/)t]&n
堆排序： *XVwTW[a
A4K.,bZ
package org.rut.util.algorithm.support; {$*N1$(%
).k DY?s
import org.rut.util.algorithm.SortUtil; JxAQ,oOO
qWt}8_"
/** -yYdj1y;
* @author treeroot N;7/C
* @since 2006-2-2 `8:0x?X
* @version 1.0 nwRltK
*/ "q@m6fs
public class HeapSort implements SortUtil.Sort{ c OYDN[k
okNo-\Dh!
/* (non-Javadoc) G0cG%sIl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TkbaoD
*/ I[\~pi,
public void sort(int[] data) { UM}u(;oo%)
MaxHeap h=new MaxHeap(); $vO&C6m$
h.init(data); {Kz,_bo
for(int i=0;i h.remove(); -%K!Ra\W
System.arraycopy(h.queue,1,data,0,data.length); jmok]-pC
} f8 d 3ZK
ny={OhP-
private static class MaxHeap{ ~E<2gMKjO
d:H'[l.F%
void init(int[] data){ YO6BzS/~
this.queue=new int[data.length+1]; cTqkM@S
for(int i=0;i queue[++size]=data; cNs'GfD}
fixUp(size); !3v&+Jrf6
} (~T*yH ~
} 92+8zX
c\bL_
private int size=0; {pzj@b 1S
0c_xPBbB+
private int[] queue; I`>U#x*
v9$!v^U"D
public int get() { rr<E#w
return queue[1]; &4#Zi.]
} [,%=\%5
l6viP}R
public void remove() { 8xpplo8
SortUtil.swap(queue,1,size--); xNP_>Qa~
fixDown(1); 7ubz7*
} p7?
file://fixdown ~6vz2DuB=
private void fixDown(int k) { >yIJ8IDF
int j; xo:kT)
while ((j = k << 1) <= size) { hy;VvAH5
if (j < size %26amp;%26amp; queue[j] j++; !<bwg
if (queue[k]>queue[j]) file://不用交换 !_S>ER
break; V5|ANt
SortUtil.swap(queue,j,k); [U\?+@E*
k = j; D}-.<
} XQ}Zr/f6
} Fsx?(?tCMo
private void fixUp(int k) { 4 1_gak;
while (k > 1) { *O?c~UJhhV
int j = k >> 1; _n&Nw7d2 M
if (queue[j]>queue[k]) ngY%T5-
break; n,la<N]
SortUtil.swap(queue,j,k); {Gxe%gu6K
k = j; 7 ,Rg~L
} :Pud%}'
} c:R?da
J~YT~D2L
} WJ7|0qb
'<Z[e`/
} ^0VL](bD>
?KT{H(rU
SortUtil： R1jl<=
{]vD@)k
package org.rut.util.algorithm; >1y6DC
?ukw6T
import org.rut.util.algorithm.support.BubbleSort; ?Ua,ba*
import org.rut.util.algorithm.support.HeapSort; Tc2.ciU
import org.rut.util.algorithm.support.ImprovedMergeSort; VYyija:
import org.rut.util.algorithm.support.ImprovedQuickSort; W,q @ww u
import org.rut.util.algorithm.support.InsertSort; gN&i&%*!
import org.rut.util.algorithm.support.MergeSort; pO]gf$
import org.rut.util.algorithm.support.QuickSort; zF&VzNR2
import org.rut.util.algorithm.support.SelectionSort; T U%@_vYR
import org.rut.util.algorithm.support.ShellSort; OvdT* g=8*
u\R?(G&
/** Sb.8d]DW
* @author treeroot :t?B)
* @since 2006-2-2 5*0zI\
* @version 1.0 ,'#TdLe
*/ 7y=>Wa?T[
public class SortUtil { ]`^! ]Ql
public final static int INSERT = 1; M .#}
public final static int BUBBLE = 2; 3? {AGJ1
public final static int SELECTION = 3; k.T=&0J_1
public final static int SHELL = 4; 7Z-j'pq
public final static int QUICK = 5; Z%T Ajm
public final static int IMPROVED_QUICK = 6; SnCwoxK
public final static int MERGE = 7; :=QX^*
public final static int IMPROVED_MERGE = 8; qHtQ4_Zn;
public final static int HEAP = 9; R!nf^*~
1/_g36\l$
public static void sort(int[] data) { t0)1;aBZ
sort(data, IMPROVED_QUICK); 8`=?_zF
} {@Wv@H+4
private static String[] name={ %idBR7?`g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "W<Y1$Y=Y
}; 'uPAG;)m
P5S]h
private static Sort[] impl=new Sort[]{ k.@![w\ea
new InsertSort(), Z9{~t
new BubbleSort(), Hq@+m!
new SelectionSort(), !oLn=
new ShellSort(), sJHVnMA
new QuickSort(), 4WT[(
new ImprovedQuickSort(), ZR.k'
new MergeSort(), !\4x{Wa]
new ImprovedMergeSort(), "hkcN+=
new HeapSort() =C\Tl-$\f
}; \Lx=iKs<
rb?7i&-
public static String toString(int algorithm){ <O#&D|EMd|
return name[algorithm-1]; )XI[hVUA
} X1o",,N^M
7*:zN
public static void sort(int[] data, int algorithm) { nep#L>LP$x
impl[algorithm-1].sort(data); ttP7-y
} Spm 0`
"k zKQ~
public static interface Sort { *D5 xbkH=.
public void sort(int[] data); )ycI.[C
} -H| 982=
0b&#w
public static void swap(int[] data, int i, int j) { 'u,|*o
int temp = data; Mw[3711v
data = data[j]; bWPsfUn#
data[j] = temp; z4u&#.bU
} )>a~%~:
} RQ+,7Ir