[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; .:%0E`E
} tGE$z]1c@
int i1=l; yEoF4bt
int i2=mid+1; Ww+IWW@
for(int cur=l;cur<=r;cur++){ 2*l/3VW
if(i1==mid+1) bUdLs.:
data[cur]=temp[i2++]; Nkth>7*
else if(i2>r) W/bQd)Jvk
data[cur]=temp[i1++]; Ee%%d
else if(temp[i1] data[cur]=temp[i1++]; `MN4uC
else ,77d(bR<
data[cur]=temp[i2++]; _FU_Ubkr
} $AjHbU.I{
} Ed df2;-.
?(F6#"/E
} <7Or{:Sc90
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改进后的归并排序: k&vz7Q`T
2,b(,3{`4:
package org.rut.util.algorithm.support; BLf>_bUk
h# o6K#
import org.rut.util.algorithm.SortUtil; g63(E,;;J
XZ]uUP
/** vDhh>x(
* @author treeroot B:S>wFE(.
* @since 2006-2-2 i0kak`x0
* @version 1.0 }t=!(GOb}
*/ }"P|`"WW
public class ImprovedMergeSort implements SortUtil.Sort { b)5uf'?-
P90yI
private static final int THRESHOLD = 10; BWv^zi
7p16Hv7y~
/* IT7wT+
* (non-Javadoc) J~zUp(>K
* */^q{PsN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;dtA4:IRZ4
*/ %XoiVlT@:
public void sort(int[] data) { G kl71VX
int[] temp=new int[data.length]; %i9E @EV
mergeSort(data,temp,0,data.length-1); GxI!{oi2
} U}e!Wjrc
S.94edQ
private void mergeSort(int[] data, int[] temp, int l, int r) { lH x^D;m6
int i, j, k; RYQR(v
int mid = (l + r) / 2; t?-n*9,#S
if (l == r) 5z8d} I
return; b"uu
if ((mid - l) >= THRESHOLD) TA`1U;c{n
mergeSort(data, temp, l, mid); ~"&|W'he[
else vkx7paY_
insertSort(data, l, mid - l + 1); JHM9
if ((r - mid) > THRESHOLD) 'qb E=
mergeSort(data, temp, mid + 1, r); t~EPn.
else ]7F=u!/`<C
insertSort(data, mid + 1, r - mid); r4XK{KHn
p;59?
for (i = l; i <= mid; i++) { y^,1a[U.
temp = data; 0y" $MC v
} rJT^H5!o"
for (j = 1; j <= r - mid; j++) { Bs_s&a>
temp[r - j + 1] = data[j + mid]; :bu/^mW[
} P}y +G|
int a = temp[l]; +>Qq(Y
int b = temp[r]; . y-D16V
for (i = l, j = r, k = l; k <= r; k++) { %S@ZXf~:
if (a < b) { \K{0L
data[k] = temp[i++]; QQ*hCyw!
a = temp; XSe=sHEI
} else { 5T_n %vz
data[k] = temp[j--]; 7$vYo _
b = temp[j]; \FbvHr,
} ?qLFaFt/
} Yq0| J
} q77;ZPfs8
jk; clwyz/
/** +,TRfP Fb
* @param data 85|OGtt
* @param l U0 Yll4E
* @param i j9x<Y]
*/ h5{'Q$Erl
private void insertSort(int[] data, int start, int len) { <;eW=HT+uq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1#V_Z^OL
} +j`5F3@
} 3nIU1e
} fo*2:?K&
} H1pO!>M
q#Z@+(^
堆排序： J{p1|+h%
zUkgG61
package org.rut.util.algorithm.support; dUeN*Nq&(,
BOb">6C
import org.rut.util.algorithm.SortUtil; JgKO|VO
xjuN-
/** ?*G|XnM&
* @author treeroot c?f4Q,%|
* @since 2006-2-2 f}#~-.NGs
* @version 1.0 ~:rl=o}
*/ k$z_:X
public class HeapSort implements SortUtil.Sort{ (Y.k8";)`
G\/zkrxmv
/* (non-Javadoc) Zw 26
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IXMop7~
*/ ITE{@1
public void sort(int[] data) { Xk~D$~4<
MaxHeap h=new MaxHeap(); ~9,,~db
h.init(data); #l\=}#\1Wb
for(int i=0;i h.remove(); EnKR%Ctw
System.arraycopy(h.queue,1,data,0,data.length); I+%[d^,
} x*/tyZg6
[64:4/<}
private static class MaxHeap{ Sxt"B
7{e 4c
void init(int[] data){ r_)' Ps
this.queue=new int[data.length+1]; P%V'4pc
for(int i=0;i queue[++size]=data; k_L7 kvpt
fixUp(size); ~RW+GTe
} |B?m,U$A!
} APn|\
h0*!;Z7
private int size=0; u:6Ic)7'
59LZv-l
private int[] queue; )al]*[lY
VZp5)-!\
public int get() { 9tU]`f
return queue[1]; ''A_[J `>
} 2@n{yYwy
[`#CXq'
public void remove() { O%WIf__Q
SortUtil.swap(queue,1,size--); 1![!+X:w
fixDown(1); e/KDw
} !fV+z%:
file://fixdown Avge eJi
private void fixDown(int k) { O W_{$9U
int j; IA fcT!{
while ((j = k << 1) <= size) { 1*P~!2h
if (j < size %26amp;%26amp; queue[j] j++; du $:jN\}
if (queue[k]>queue[j]) file://不用交换 "(3[+W{|
break; Q,,e+exbb5
SortUtil.swap(queue,j,k); i^/T
k = j; bQzZy5,
} 1jmjg~W
} )nC]5MXU
private void fixUp(int k) { lZd(emH@
while (k > 1) { 7cuE7"
int j = k >> 1; WA<v9#m
if (queue[j]>queue[k]) \#8D>i?m
break; AVsDt2A
SortUtil.swap(queue,j,k); euK5pA>L
k = j; mxvp3t\
} b<tNk]7
} S*,17+6dV
sf:,qD=z
} !4ocZmj\
KaLzg5is
} Z\(q@3C
F#3Q_G^/
SortUtil： j"8ZM{aO
SpIv#?
package org.rut.util.algorithm; <v"R.<
z{%<<pZ
import org.rut.util.algorithm.support.BubbleSort; @f_Lp%K
import org.rut.util.algorithm.support.HeapSort; I }a`0Y&{
import org.rut.util.algorithm.support.ImprovedMergeSort; ")1:F>
import org.rut.util.algorithm.support.ImprovedQuickSort; o@_q]/Mh
import org.rut.util.algorithm.support.InsertSort; \,'m</o~,
import org.rut.util.algorithm.support.MergeSort; Oz75V|D
import org.rut.util.algorithm.support.QuickSort; 0G(/Wb"/
import org.rut.util.algorithm.support.SelectionSort; RF?`vRZOe
import org.rut.util.algorithm.support.ShellSort; D5gFXEeh
s-NX o
/** eFB5=)ld
* @author treeroot `_6C{<O
* @since 2006-2-2 H-!,yte
* @version 1.0 9sM!`Lz{
*/ (=FRmdeYl1
public class SortUtil { &Gc9VF]o
public final static int INSERT = 1; (fhb0i-
public final static int BUBBLE = 2; CmWeY$Jb
public final static int SELECTION = 3; xf'V{9*
public final static int SHELL = 4; bS{bkE>
public final static int QUICK = 5; "6("9"
public final static int IMPROVED_QUICK = 6; `{gHA+B
public final static int MERGE = 7; nd`1m[7MNu
public final static int IMPROVED_MERGE = 8; <q)#
public final static int HEAP = 9; K$z2YJ%
xEa\f[.An
public static void sort(int[] data) { lPe&h]@ >
sort(data, IMPROVED_QUICK); JB\UKZXw
} p0]=QH
private static String[] name={ mwO6g~@`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QDZWX`qw{
}; m%0p\Y-/
9v#CE!
private static Sort[] impl=new Sort[]{ k<z)WNBf
new InsertSort(), :S]\0;8]
new BubbleSort(), ,10=
new SelectionSort(), wC"FDr+
new ShellSort(), ~\r*
new QuickSort(), HGl|-nW>
new ImprovedQuickSort(), TbMW|0 #w
new MergeSort(), \a<wKTkn
new ImprovedMergeSort(), hy9\57_#
new HeapSort() @s*-%N^:[L
}; *nd!)t
UklUw
public static String toString(int algorithm){ _OYasJUMG
return name[algorithm-1]; l#&8x
} j<upRS,$
v6|RJt?
public static void sort(int[] data, int algorithm) { g%o(+d
impl[algorithm-1].sort(data); OUE(I3_
} REQ\>UO_
iG$!6;w<
public static interface Sort { XMZ,Y7
public void sort(int[] data); {.`vs;U
} @?ebuj5{e
P|`8}|}a
public static void swap(int[] data, int i, int j) { zg>zUe bA
int temp = data; "2!&5s,1p
data = data[j]; C-xr"]#]
data[j] = temp; @b\$yB@z
} 1> ?M>vK
} n>z9K')