[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; i"zuil
} lPH%Do>K
int i1=l; /[:dp<
int i2=mid+1; {^CT}\=>
for(int cur=l;cur<=r;cur++){ mS>xGtD&K
if(i1==mid+1) AIb2k
data[cur]=temp[i2++]; r`&-9"+
else if(i2>r) EcIE~qs
data[cur]=temp[i1++]; h1 WT
else if(temp[i1] data[cur]=temp[i1++]; bn 6WjJ~Z+
else 4${jr\q]
data[cur]=temp[i2++]; i 8!zu!-0
} -yxOBq
} 5tJ,7Y'
_(J&aY\
} ZnFi<@UB)
NC&DFJo
改进后的归并排序: $,I q;*7N
Vc^HVyAx@n
package org.rut.util.algorithm.support; }'r[m5T
G;> _<22
import org.rut.util.algorithm.SortUtil; b[z]CP
&aM7T_h8
/** 8eA+d5k\.
* @author treeroot tg^sCxz9]
* @since 2006-2-2 f>BWG`
* @version 1.0 +% /s*EC'w
*/ U$oduY#
public class ImprovedMergeSort implements SortUtil.Sort { %h1N3\y9i(
Ehzo05/!
private static final int THRESHOLD = 10; FZreP.2)!
_%'},Xd.z
/* u66XN^
* (non-Javadoc) 5J8r8` t
* L lqM c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (E,T#uc{
*/ /iG*)6*^k
public void sort(int[] data) { (}.@b|s
int[] temp=new int[data.length]; sLE#q+W
mergeSort(data,temp,0,data.length-1); kq\)MQ"/X
} &d7Z6P'`G
zByT$P-
private void mergeSort(int[] data, int[] temp, int l, int r) { >-&R47G
int i, j, k; }b1cLchl
int mid = (l + r) / 2; Nn>'^KZNG
if (l == r) 5s(1[(
return; (EPsTox
if ((mid - l) >= THRESHOLD) lKk/p^:
mergeSort(data, temp, l, mid); M$f7sx
else <dyewy*.L
insertSort(data, l, mid - l + 1); Uye|9/w8 !
if ((r - mid) > THRESHOLD) UH7jP#W%=
mergeSort(data, temp, mid + 1, r); w+1Gs ;
else fdONP>K[E
insertSort(data, mid + 1, r - mid); SkU9ON
" RxP^l
for (i = l; i <= mid; i++) { TLehdZ>^
temp = data; UGK*Gy
} )O:0]=#))
for (j = 1; j <= r - mid; j++) { R$zH]
temp[r - j + 1] = data[j + mid]; ybp -$e
} E*i#?u
int a = temp[l]; Ov<NsNX]
int b = temp[r]; D7_*k%;@
for (i = l, j = r, k = l; k <= r; k++) { {v3P9s(
if (a < b) { $XoQ]}"O
data[k] = temp[i++]; GfC5z n>
a = temp; vloF::1
} else { 2wF8 P)
data[k] = temp[j--]; uwlr9nB
b = temp[j]; ||yzt!n
} I-OJVZ( V
} jt+iv*2N>
} hB{jUP)";
! VjFW5'{
/** f 2l{^E#h
* @param data v%Wx4v@%SE
* @param l T0]MuIJ).
* @param i -_$$Te
*/ +>JjvYx}\
private void insertSort(int[] data, int start, int len) { ~i 7^P9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?6'rBH/w
} [=~pe|8:
} 6AocmR0D'
} aMTu-hA
} J=/5}u_gw
$\9~)Rq6
堆排序： y( y8+ZT
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package org.rut.util.algorithm.support; $ `7^+8vHV
mc4i@<_?
import org.rut.util.algorithm.SortUtil; CirZ+o
0Fu~%~#E$
/** 8_N]e'WUh
* @author treeroot Y".RPiTL
* @since 2006-2-2 r(9~$_(vK
* @version 1.0 "Wx]RN:
*/ 3do)Vg4
public class HeapSort implements SortUtil.Sort{ ,i@X'<;y
n?V+dC=F}
/* (non-Javadoc) H= X|h)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7%sdtunf`
*/ NFv>B>
public void sort(int[] data) { 'F3)9&M
MaxHeap h=new MaxHeap(); Pi|o`d
h.init(data); 63A}TBC
for(int i=0;i h.remove(); j)q\9#sI/(
System.arraycopy(h.queue,1,data,0,data.length); f7}*X|_Y
} M9f35 :
0bo/XUpi
private static class MaxHeap{ j1(D]Z=\
Rn@#d}
void init(int[] data){ "^Ybs'-
this.queue=new int[data.length+1]; `jOX6_z?I
for(int i=0;i queue[++size]=data; }1rm
fixUp(size); Q`D_|L
} Tyck/ EO
} k?7 X3/O
mml z&h
private int size=0; ~ar=PmYV7
&ot/nQQ
private int[] queue; LCQE_}Mh
Qa.uMq
public int get() { zen*PeIrA^
return queue[1]; N 8-oY$*
} F;>!&[h}G
9VbOQ{8
public void remove() { & GreN
SortUtil.swap(queue,1,size--); wm^J;<T[
fixDown(1); O]m+u
} Ox@P6|m
file://fixdown =lpQnj"
private void fixDown(int k) { 12+>5BA
int j; [n/hkXa$\
while ((j = k << 1) <= size) { znHnVYll(
if (j < size %26amp;%26amp; queue[j] j++; QNl'ZB\
if (queue[k]>queue[j]) file://不用交换 m?&1yU9
break; GDuMY\1
SortUtil.swap(queue,j,k); l(Q?rwI8Y
k = j; ~^cMys |'
} C/-63O_
} =J~ x
private void fixUp(int k) { ^53r/V}%
while (k > 1) { x@Hc@R<!
int j = k >> 1; ,f&5pw =
if (queue[j]>queue[k]) 7t*"%]o
break; /Js7`r=Rx
SortUtil.swap(queue,j,k); ~_!F01s
k = j; r4#o+qE
} cA:*V|YV`
} NhYLtw^u
h3;bxq!q
} M^]cM(swK5
L~KM=[cn
} |.3DD"*
LA)[ip4
SortUtil： Gmz6$^D
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package org.rut.util.algorithm; U,.![TP
~b2wBs)r
import org.rut.util.algorithm.support.BubbleSort; piZJJYv t
import org.rut.util.algorithm.support.HeapSort; J:\|Nc?
import org.rut.util.algorithm.support.ImprovedMergeSort; 0MdDXG-7
import org.rut.util.algorithm.support.ImprovedQuickSort; ^) s2$A:L
import org.rut.util.algorithm.support.InsertSort; @W9x$
import org.rut.util.algorithm.support.MergeSort; GbaEgA'fa
import org.rut.util.algorithm.support.QuickSort; @#-q^}3
import org.rut.util.algorithm.support.SelectionSort; $81*^
import org.rut.util.algorithm.support.ShellSort; Ny%(VI5:
:dqn h
/** *VZ5B<Ic
* @author treeroot oo.2Dn6z
* @since 2006-2-2 :EA\)@^$R
* @version 1.0 =7o"u3hG
*/ [2{1b`e
public class SortUtil { I'0@viF"Nx
public final static int INSERT = 1; yYH0v7vx+
public final static int BUBBLE = 2; J>bJ 449B
public final static int SELECTION = 3; c?,i3s+2Y
public final static int SHELL = 4; >cCR2j,r
public final static int QUICK = 5; KkE9KwZ]W
public final static int IMPROVED_QUICK = 6; bAm(8nT7w
public final static int MERGE = 7; G@Z?&"
public final static int IMPROVED_MERGE = 8; 5>\/[I/!
public final static int HEAP = 9; +@/"%9w
#gcF"L||
public static void sort(int[] data) { x HhN
sort(data, IMPROVED_QUICK); _}En/V_
} ksN+?E4w
private static String[] name={ heK7pH7;d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )6J9J+%bi
}; %V ;?
MEGv}
private static Sort[] impl=new Sort[]{ aWY gR
new InsertSort(), Sh8"F@P8
new BubbleSort(), d$Pab*
new SelectionSort(), 9& 83n(m
new ShellSort(), jYhB +|
new QuickSort(), Pw61_ZZ4B\
new ImprovedQuickSort(), gjAIEI
new MergeSort(), ZXuv CI
new ImprovedMergeSort(), 9*1,!%]
new HeapSort() Oal3rb
}; &mtJRfnu
rq/I` :
public static String toString(int algorithm){ |]X
return name[algorithm-1]; >b{q.
} wGP;Vbk
$ . 9V&
public static void sort(int[] data, int algorithm) { 3^6 d]f
impl[algorithm-1].sort(data); -#HA"7XOE
} :FTMmW,>'
A'&K/)Z
public static interface Sort { Gnq?"</
public void sort(int[] data); % V8U(z
} E`uY1B[c
hK,Sf ;5V
public static void swap(int[] data, int i, int j) { F 70R1OYU
int temp = data; Yd~X77cv
data = data[j]; bq:(u4 3
data[j] = temp; u2?|Ue@[
} Y*vW!yu
} n*{sTT