[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; +LrW#K;
} \2~.r/`1
int i1=l; ZW,PZ<
int i2=mid+1; &M<431y
for(int cur=l;cur<=r;cur++){ )TXn7{M:
if(i1==mid+1) ~-.q<8
data[cur]=temp[i2++]; g|2D(J
else if(i2>r) ;M}bQ88
data[cur]=temp[i1++]; }LE.kd&
else if(temp[i1] data[cur]=temp[i1++]; yQ&;#`!'
else 0E++
data[cur]=temp[i2++]; `.><$F
} CVu'uyy
} ,/Xxj\i
8whjPn0
} 'd/A+W
g%^Zq"
改进后的归并排序: =L&_6lb
s;$ eq);
package org.rut.util.algorithm.support; na%9E8;:&v
Rk`c'WP0*
import org.rut.util.algorithm.SortUtil; Qza[~6
Be-gGJG
/** {>5c,L$
* @author treeroot en#W<"_"
* @since 2006-2-2 4?8GK
* @version 1.0 >N44&W
*/ =(v/pLLK?
public class ImprovedMergeSort implements SortUtil.Sort { vUj7rDT|
hydn" 9;
private static final int THRESHOLD = 10; q-p4k`]
JCE364$$"
/* wwE9|'Ok
* (non-Javadoc) _3ZZ-=J:=*
* !'n+0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) US4X CJxB
*/ {dCkiF
public void sort(int[] data) { &XN*T.Y`
int[] temp=new int[data.length]; jj.)$|&#`
mergeSort(data,temp,0,data.length-1); |1rBK.8
} {:fyz#>>^
=OhhMAn
private void mergeSort(int[] data, int[] temp, int l, int r) { qAkx52v6
int i, j, k; )WuuU [(
int mid = (l + r) / 2; h]G}E9\l
if (l == r) J6\<>5A?
return; \:^$ZBQr<n
if ((mid - l) >= THRESHOLD) W._vikR
mergeSort(data, temp, l, mid); rt t?4
else *$uKg zv3
insertSort(data, l, mid - l + 1); RrGS$<
if ((r - mid) > THRESHOLD) D3BX[
mergeSort(data, temp, mid + 1, r); (r:WG!I,
else b-%7@j
insertSort(data, mid + 1, r - mid); &`t-[5O\
vk.Y2 :
for (i = l; i <= mid; i++) { CuU"s)
temp = data; (\#j3Y)r
} h jWRU#
for (j = 1; j <= r - mid; j++) { E$*I.i_m
temp[r - j + 1] = data[j + mid]; &)<]AG.vd!
} QMHeU>
int a = temp[l]; o y}(
int b = temp[r]; G2rxr
for (i = l, j = r, k = l; k <= r; k++) { ,tmo6D62
if (a < b) { TkmN.@w_C
data[k] = temp[i++]; v]Pw]m5=U
a = temp; =ww8,z4X
} else { +=U`
data[k] = temp[j--]; H;Z{R@kf
b = temp[j]; Oj~k1+*
} ApjLY58=
} j&[63XSe
} %|r@q
|M0 XLCNd_
/** A]Q4fD1q
* @param data )QFT$rmX
* @param l oa1&9
* @param i 5#q ^lL
*/ v>7tJ[s
private void insertSort(int[] data, int start, int len) { hTH"jAC+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7s>d/F3*
} x8tRa0-q
} z[IG+2
} A3!NEFBK
} ?W%3>A
8I NVn'G
堆排序： s13Iu#
JI@~FD&
package org.rut.util.algorithm.support; E(8O3*=
umI#P,%[
import org.rut.util.algorithm.SortUtil; -D38>#Y
K31Fp;K
/** \`|,wLgH
* @author treeroot QF!K$?EU[
* @since 2006-2-2 VO. Y\8/
* @version 1.0 0z.`
*/ q'",70"\
public class HeapSort implements SortUtil.Sort{ aH,0+|
:,]%W $f=
/* (non-Javadoc) z4H!b+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >d#B149
*/ %6kD^K-
public void sort(int[] data) { cf@:rHB}
MaxHeap h=new MaxHeap(); kf&id/|
h.init(data); @2kt6 W
for(int i=0;i h.remove(); ~wh8)rm
System.arraycopy(h.queue,1,data,0,data.length); $].< /
} O#cXvv]Z*
_pjpPSV6J
private static class MaxHeap{ sN^R Z0!>
%+>I1G
void init(int[] data){ {3 zq.e{
this.queue=new int[data.length+1]; 9.SPxd~
for(int i=0;i queue[++size]=data; N@;6/[8
fixUp(size); +!.=M8[
} jO!!. w
} b3y@!_'c
V"T;3@N/4
private int size=0; is#?O5:2
wR>\5z)^
private int[] queue; {IqbO>|"O_
4+ yd/^S
public int get() { LT:KZ|U9
return queue[1]; }g>&l.2X
} ]UFf-
o)Ob}j
public void remove() { Jw"'ZW#W
SortUtil.swap(queue,1,size--); oy/#,R_n%
fixDown(1); nJA\P1@m
} L!-T`R8'c
file://fixdown m:X;dcq'3
private void fixDown(int k) { +}X@{DB
int j; 6 )xm?RK
while ((j = k << 1) <= size) { Tw-gM-m;
if (j < size %26amp;%26amp; queue[j] j++; fu\M2"e
if (queue[k]>queue[j]) file://不用交换 9J0m
break; U*[/F)!
SortUtil.swap(queue,j,k); GZ*cV3Y`&
k = j; A5Y z|
} GP`_R
} ,58D=EgFy
private void fixUp(int k) { 6S<J'9sE
while (k > 1) { "aAzG+NM
int j = k >> 1; ~{RXc+
if (queue[j]>queue[k]) e"[o2=v;5
break; sq-[<ryk
SortUtil.swap(queue,j,k); <Cn-MOoM
k = j; b@z/6y!
} vSPkm)O0)
} ~qco -b
z.P) :Er
} h-Ffs
1r|'n aiZ
} ^Shz[=fd
T+N%KRl
SortUtil： 4CfPa6_
/< h~d
package org.rut.util.algorithm; `NyvJt^<
4^ $
import org.rut.util.algorithm.support.BubbleSort; |f?tyQ
import org.rut.util.algorithm.support.HeapSort; gKn"e|A
import org.rut.util.algorithm.support.ImprovedMergeSort; gtVI>D'(W
import org.rut.util.algorithm.support.ImprovedQuickSort; Fl<BCJY
import org.rut.util.algorithm.support.InsertSort; *siS4RX2
import org.rut.util.algorithm.support.MergeSort; SWPr5h
import org.rut.util.algorithm.support.QuickSort; -HS(<V=a?k
import org.rut.util.algorithm.support.SelectionSort; !1w=_
import org.rut.util.algorithm.support.ShellSort; IF$f^$
YRAWylm
/** shjS^CP
* @author treeroot b P4R
* @since 2006-2-2 >N{K)a
* @version 1.0 ?b:l.0m
*/ AQQeLdTq
public class SortUtil { j%#n}H
public final static int INSERT = 1; RU>T?2
public final static int BUBBLE = 2; m9a(f>C
public final static int SELECTION = 3; al(t-3`<
public final static int SHELL = 4; p4*VE5[?_+
public final static int QUICK = 5; }{J<Wzw
public final static int IMPROVED_QUICK = 6; NoV)}fX$X8
public final static int MERGE = 7; O*`] ]w]
public final static int IMPROVED_MERGE = 8; (kK6=Mrf
public final static int HEAP = 9; /{."*jK
hwSn?bkw
public static void sort(int[] data) { AQDT6E:
sort(data, IMPROVED_QUICK); Q]uxZ;}aF
} ,mx>)}l95
private static String[] name={ [x kbzJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" am]$`7R5d
}; V{HP8f91
CC;T[b&
private static Sort[] impl=new Sort[]{ K|[[A)tt6
new InsertSort(), xrFFmQ<_W
new BubbleSort(), Cdin"
new SelectionSort(), ypSW9n
new ShellSort(), }q^M
new QuickSort(), pd?3_yU
new ImprovedQuickSort(), K@)Hm\*
new MergeSort(), vUk <z*
new ImprovedMergeSort(), /. k4Y
new HeapSort() n,!PyJ
}; a^hDxeG
)$p<BLU
public static String toString(int algorithm){ k|(uIU* ]
return name[algorithm-1]; wR@&C\}9
} <7NY.zvwk]
TRW{`b[
public static void sort(int[] data, int algorithm) { $p#)xx7
impl[algorithm-1].sort(data); 7s+3^'
} Q*u4q-DE
ebxpKtEC
public static interface Sort { o?BcpWp
public void sort(int[] data); aKkL0D
} TPEg>[
`dO)}}| y
public static void swap(int[] data, int i, int j) { P1tc*2Z
int temp = data; D/[(}o(
data = data[j]; owM3Gz%?UA
data[j] = temp; ByqB4Hv2
} SIQ7oxS4
} P(D0ru