[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; Vn'?3Eb<
} d<#p %$A4
int i1=l; QO2Ut!Y
int i2=mid+1; 7{-@}j`
for(int cur=l;cur<=r;cur++){ W,Ty=:qm*
if(i1==mid+1) _ \l HI
data[cur]=temp[i2++]; K5{{:NR$
else if(i2>r) GA\2i0ow
data[cur]=temp[i1++]; Rb#/qkk/
else if(temp[i1] data[cur]=temp[i1++]; pw=F' Y@N
else Uj,g]e8e
data[cur]=temp[i2++]; *6XRjq^#
} EY~7oNfc`R
} ! tGiTzzp
8 }-7{
} ABcBEv3
w,Q)@]_
改进后的归并排序: k{a)gFH O
k d+l k:
package org.rut.util.algorithm.support; Ah (iE
e8{^f]5
import org.rut.util.algorithm.SortUtil; I0iY+@^5
_lP4}9p
/** 7,h3V=^)Q
* @author treeroot y:.?5KsPI
* @since 2006-2-2 !N1J@LT5h
* @version 1.0 ;|!MI'Af
*/ ugI#ZFjJWE
public class ImprovedMergeSort implements SortUtil.Sort { x9%-plP
P{cos&X|
private static final int THRESHOLD = 10; 1aq2aLx
zks#EzQ
/* .a,(pq Jg
* (non-Javadoc) F$h'p4$T
* &$F[/[Ds+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3p_b8K_bG
*/ @bT3'K-4
public void sort(int[] data) { z?kd'j`FG
int[] temp=new int[data.length]; \-OC|\{32
mergeSort(data,temp,0,data.length-1); D"cKlp-I6|
} Z(HZB
cz#_<8'N
private void mergeSort(int[] data, int[] temp, int l, int r) { 4[1k\
int i, j, k; lUHtjr
int mid = (l + r) / 2; vL$|9|W(
if (l == r) %}h`+L
return; "y$ qrN-
if ((mid - l) >= THRESHOLD) 9#Y2`pT
mergeSort(data, temp, l, mid); zmb@*/fK
else \i0-o8q@I
insertSort(data, l, mid - l + 1); A*F9\mjI5
if ((r - mid) > THRESHOLD) E~RV1)
mergeSort(data, temp, mid + 1, r); Sph*1c(R
else hM>*a!)U
insertSort(data, mid + 1, r - mid); =/Wu'gG)
@+&'%1
for (i = l; i <= mid; i++) { 4gOgWBv
temp = data; #V[SQ=>x[
} | ]# +v@
for (j = 1; j <= r - mid; j++) { ]_u`EvEx6
temp[r - j + 1] = data[j + mid]; o@3B(j;J`
} /UHp [yod
int a = temp[l]; eu9w|g
int b = temp[r]; X`1p'JD
for (i = l, j = r, k = l; k <= r; k++) { t#5:\U5r.
if (a < b) { TEWAZVE*
data[k] = temp[i++]; Pbe7SRdr^
a = temp; <tuS,.
} else { Dx3%KS
data[k] = temp[j--]; c&*l"
b = temp[j]; hk} t:<
} h$Tr sO
} [4>r6Hqxr
} Ea]T>4
=/9<(Tt%m
/** @.ZL7$|d
* @param data io2@}xZF
* @param l oy5+}`
* @param i -k{Jp/-D
*/ L\L"mc|O
private void insertSort(int[] data, int start, int len) { 7|Dn+=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lw[<STpD;
} f`|G]da-3o
} fY_%33_I$
} TwFb%YM
} JZ=5Bpw
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堆排序： 4SR(->@
g1@wf
package org.rut.util.algorithm.support; jNc<~{/
GNU;jSh5
import org.rut.util.algorithm.SortUtil; s;1e0n
sPCMckt
/** |>2:eH
* @author treeroot CH;;V3
* @since 2006-2-2 tpYa?ZCM
* @version 1.0 eYEc^nC,c)
*/ A1-qtAO]
public class HeapSort implements SortUtil.Sort{ ZEGd4_ux
/{X_ .fv<v
/* (non-Javadoc) ]:et~pfW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w>vH8f
*/ :JlDi>B
public void sort(int[] data) { D|Si)_ Iz
MaxHeap h=new MaxHeap(); zfjw;sUX
h.init(data); ?"j@;/=
for(int i=0;i h.remove(); 9":2"<'+
System.arraycopy(h.queue,1,data,0,data.length); #ElejQ|?
} uD(t`W"
VAKy^nR5j
private static class MaxHeap{ xl2g0?
C`4gsqD;Z
void init(int[] data){ .pvxh|V
this.queue=new int[data.length+1]; <xlm K(
for(int i=0;i queue[++size]=data; Mm#[&j[Y
fixUp(size); gs`> C(
} [5Y<7DS
} <&U!N'CE
(WE,dY+.
private int size=0; }-p,iTm
zu<3^=3
private int[] queue; @^?XaU
kon=il<@
public int get() { [6RfS
return queue[1]; 0x5xLg;Q
} o.^y1mH'
2U9&l1P=
public void remove() { ` X}85
SortUtil.swap(queue,1,size--); / Z!i;@Wf
fixDown(1); >Z\BfH
} ]a/'6GbR
file://fixdown GZ8:e3ri
private void fixDown(int k) { I7mG/
int j; <zfKC
while ((j = k << 1) <= size) { F_ljx
if (j < size %26amp;%26amp; queue[j] j++; (M`|'o!
if (queue[k]>queue[j]) file://不用交换 Ror2qDF
break; LC-)'Z9}5
SortUtil.swap(queue,j,k); U:|H9+5
k = j; J&6:d
} Gzm$OHbn
} o~C('1Fdb
private void fixUp(int k) { ez*jjm
while (k > 1) { iP "EA8
int j = k >> 1; =nVmthGw
if (queue[j]>queue[k]) 6vp0*ww
break; H?U't 09
SortUtil.swap(queue,j,k); <y>:B}9'
k = j; )i!^]|$
} PayV,8
} 7>-yaL{
%j{.0H
} :'*DMW~
EXpSh}
} %^.P~s6
K{b-TT 4
SortUtil： @GGccF
2c:f<>r0y
package org.rut.util.algorithm; &1Fply7(Ay
\9/1L?@
import org.rut.util.algorithm.support.BubbleSort; 2P5_zND
import org.rut.util.algorithm.support.HeapSort; @2' %o<lF
import org.rut.util.algorithm.support.ImprovedMergeSort; 4P kfUMX
import org.rut.util.algorithm.support.ImprovedQuickSort; qtzRCA!9(Z
import org.rut.util.algorithm.support.InsertSort; F~_;o+e;X
import org.rut.util.algorithm.support.MergeSort; &KqVN]1+^
import org.rut.util.algorithm.support.QuickSort; ^M|K;jt>
import org.rut.util.algorithm.support.SelectionSort; oJY[{-qW
import org.rut.util.algorithm.support.ShellSort; #@Y/{[s|@
2k1aX~?
/** #WufZ18#
* @author treeroot !R:y'Y%j
* @since 2006-2-2 cZQu*K^j
* @version 1.0 9*}gl3y
*/ ,{{SI
public class SortUtil { dr})-R
public final static int INSERT = 1; $']VQ4tZ
public final static int BUBBLE = 2; 40K2uT{cq
public final static int SELECTION = 3; <NB41/
public final static int SHELL = 4; xmH-!Da
public final static int QUICK = 5; \G;CQV#{9
public final static int IMPROVED_QUICK = 6; 7g6RiH}
public final static int MERGE = 7; zvf3b!}
public final static int IMPROVED_MERGE = 8; [7W(NeMk
public final static int HEAP = 9; \&q=@rJp(z
.3wY\W8Dr-
public static void sort(int[] data) { {}\CL#~y
sort(data, IMPROVED_QUICK); GLh]G(
} D1X{:#|
private static String[] name={ ]\;xN~l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'G#SLqZy
}; R^8B3-aA`
<qY5SV,
private static Sort[] impl=new Sort[]{ crn k|o
new InsertSort(), CLK^gZ
new BubbleSort(), p4mY0Y]mP
new SelectionSort(), ]T^is>
new ShellSort(), 6 =gp:I
new QuickSort(), Hg(5S,O2
new ImprovedQuickSort(), y\[r(4h
new MergeSort(), JO1 ,TtA
new ImprovedMergeSort(), |:2c$zq
new HeapSort() mm,lhIh
}; ULl_\5s2
+hH}h?K
public static String toString(int algorithm){ Lq04T0
return name[algorithm-1]; Q}P-$X+/ n
} j Z'&0x"U
- L~Uu^o
public static void sort(int[] data, int algorithm) { l3J$md|f
impl[algorithm-1].sort(data); ;~/4d-
} a[C&e,)}
"!q?P" @C
public static interface Sort { l{%a&/
public void sort(int[] data); Y';>O`
} !_^g8^>2(
Y4To@TrN#\
public static void swap(int[] data, int i, int j) { IZ~.{UQ
int temp = data; qrDcL>Hrn
data = data[j]; T[2}p=<%
data[j] = temp; 3j*'HST
} sh6(z?KP
} =_QkH!vI