[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; RyD$4jk+T"
} X;>} ;LiK
int i1=l; Ih"Ol(W
int i2=mid+1; H;&t"Ql.
for(int cur=l;cur<=r;cur++){ .w)t<7 y
if(i1==mid+1) %;?3A#
data[cur]=temp[i2++]; A@'W $p?5r
else if(i2>r) E=trJge
data[cur]=temp[i1++]; !2Iwuru
else if(temp[i1] data[cur]=temp[i1++]; ?\r3 _
else z59J=?|
data[cur]=temp[i2++]; ~-i?=
} *4y r7~S5
} tpK4 gjf
RL9BB.
} !,"G/}'^;
axOy~%%c
改进后的归并排序: OG`Oi^2
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package org.rut.util.algorithm.support; z(eAwmuli
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import org.rut.util.algorithm.SortUtil; S}O\<6&
u)pBFs<dn
/** czRh.kz,
* @author treeroot :nEV/"#F
* @since 2006-2-2 .x%SbG<k{
* @version 1.0 T,>e\
*/ DboqFh#]=h
public class ImprovedMergeSort implements SortUtil.Sort { $@wkQ%
r%n[PK^(
private static final int THRESHOLD = 10; TD7ONa-,
`I$A;OPK7
/* k#[s)Ja?s
* (non-Javadoc) !o!04_
* T7'$A!c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )_?$B6hf,&
*/ KW<CU'
public void sort(int[] data) { Um<vsR
int[] temp=new int[data.length]; -Ma"V
mergeSort(data,temp,0,data.length-1); tEs$+b
} V.1sZYA9
=T]OYk
private void mergeSort(int[] data, int[] temp, int l, int r) { ")OLmkC
int i, j, k; $ 1ZY Vw
int mid = (l + r) / 2; l?[DO?m+R
if (l == r) _3S{n=9
return; dz 2d`=`3
if ((mid - l) >= THRESHOLD) FoQk
mergeSort(data, temp, l, mid); lR!$+atW
else *Rd&4XG
insertSort(data, l, mid - l + 1); a=dN.OB}F7
if ((r - mid) > THRESHOLD) y"ck;OQD
mergeSort(data, temp, mid + 1, r); p3'+"sFU
else &EOh}O<
insertSort(data, mid + 1, r - mid); Ui&$/%Z|
X;NTz75
for (i = l; i <= mid; i++) { %Z4=3?5B"9
temp = data; V^i3:'
} T\>=o]
for (j = 1; j <= r - mid; j++) { ,}0pK\Y>$
temp[r - j + 1] = data[j + mid]; !TFVBK
} L')zuI
int a = temp[l]; <9~qAq7^
int b = temp[r]; aJ5R0Y,
for (i = l, j = r, k = l; k <= r; k++) { %ZK}y{u\
if (a < b) { t/g}cR^Q
data[k] = temp[i++]; (1^(V)@
a = temp; |*$_eb
} else { n6f|,D!?
data[k] = temp[j--]; Y<v55m-
b = temp[j]; -E7\.K3
} 25L{bcng
} lLhCk>a
} %Y TIS*+0
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/** ?H&p zY~H
* @param data `O/)q^m1L
* @param l L/I-(08!Y:
* @param i 0bE_iu>f'
*/ _f`m/l
private void insertSort(int[] data, int start, int len) { KJiwM(o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >. Y~F(
} 6_Kz}PQ
} q}jf&xUWzH
} $((<le5-)
} ZE^de(Fm
p98lu'?@
堆排序： @j6D#./7j
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package org.rut.util.algorithm.support; _,^sI%
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import org.rut.util.algorithm.SortUtil; ?HY0@XILI
dQ[lXV[}v
/** }W<L;yD
* @author treeroot mI# BQE`p6
* @since 2006-2-2 EB#z\
* @version 1.0 yl}Hr*
*/ ZeO>Ag^
public class HeapSort implements SortUtil.Sort{ Dfea<5~^z
`4CRpz
/* (non-Javadoc) <T wq{kt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s@$AYZm_
*/ >BX_Bou
public void sort(int[] data) { 1 wG1\9S
MaxHeap h=new MaxHeap(); llzl-2`/
h.init(data); #lO;G k{
for(int i=0;i h.remove(); ?P5D!b:(
System.arraycopy(h.queue,1,data,0,data.length); fHigLL0B
} I9E@2[=!
RA6D dqT~
private static class MaxHeap{ C\{4<:<_&
!cZsIcIe
void init(int[] data){ xn"g_2Hi
this.queue=new int[data.length+1]; ^tv*I~>J!
for(int i=0;i queue[++size]=data; {x8`gP\H
fixUp(size); XP7A.I#q0
} 0\+Qi?&
} ? _W*7<
z+b~#f3
private int size=0; 181P;R=}<
t`AD9 H"\!
private int[] queue; CqoL5qt
J.<m@\U
public int get() { j- A|\:
return queue[1]; g=pDC+
} /Yh8r1^2tZ
P}5aN_v\
public void remove() { *%O1d.,
SortUtil.swap(queue,1,size--); _5zR!|\^
fixDown(1); -K jCPc
} 9hv\%_>o
file://fixdown =vFI4)$-
private void fixDown(int k) { Cn,jLy
int j; =8iM,Vl3
while ((j = k << 1) <= size) { AKpux,@xB
if (j < size %26amp;%26amp; queue[j] j++; s+[=nau('w
if (queue[k]>queue[j]) file://不用交换 {t7 M
break; O!g> f
SortUtil.swap(queue,j,k); :* 'i\
k = j; <fw[7=_)^
} ql#K72s
} h %nZKhm
private void fixUp(int k) { !hq7R]TC+
while (k > 1) { |0&S>%=
int j = k >> 1; J.-#:OZ
if (queue[j]>queue[k]) &0#qy9wx
break; pk/#+r;
SortUtil.swap(queue,j,k); )6(mf2&
k = j; ~_raI7,
} Dihk8qJ/6
} b &JPLUr
;#;X@BhS
} HV sIbQS
s#Le`pGoW
} Ev()2 80
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SortUtil： ?eu=0|d
3]!(^N>V
package org.rut.util.algorithm; r[gV`khka
+q4T];<
import org.rut.util.algorithm.support.BubbleSort; '.iUv#j4Sh
import org.rut.util.algorithm.support.HeapSort; EgY]U1{
import org.rut.util.algorithm.support.ImprovedMergeSort; PQfx0n,
import org.rut.util.algorithm.support.ImprovedQuickSort; v uJ~Lg{
import org.rut.util.algorithm.support.InsertSort; }$7Hf+G
import org.rut.util.algorithm.support.MergeSort; {*|yU"
import org.rut.util.algorithm.support.QuickSort; mz#(\p=T
import org.rut.util.algorithm.support.SelectionSort; hE=cgO`QU
import org.rut.util.algorithm.support.ShellSort; %pMW5]H
$]Q_x?
/** zYep V
* @author treeroot TqlUe@E
* @since 2006-2-2 +@!9&5SA
* @version 1.0 / g&mDYV|
*/ lu>>~vy6
public class SortUtil { t*DM^.@
public final static int INSERT = 1; T1x$v,)8x
public final static int BUBBLE = 2; F;zmq%rK
public final static int SELECTION = 3; =3}+f-6"'
public final static int SHELL = 4; Dk4Wj"LS
public final static int QUICK = 5; ZK13[_@9
public final static int IMPROVED_QUICK = 6; Z?GC+hG`
public final static int MERGE = 7; aqMZ%~7
public final static int IMPROVED_MERGE = 8; <q!{<(:
public final static int HEAP = 9; >uQ!B/C!
9u:MF0:W
public static void sort(int[] data) { z` sH
sort(data, IMPROVED_QUICK); l/TH"z(
} We" "/X
private static String[] name={ |sI^_RdBv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )N}xKw|
}; PKwx)! Rz
Kkd7D_bZ*
private static Sort[] impl=new Sort[]{ c`iSe$eS
new InsertSort(), .D7\Hao
new BubbleSort(), o]]Q7S=
new SelectionSort(), #0mn_#-P)
new ShellSort(), ~[[a7$_4
new QuickSort(), ]03!KE
new ImprovedQuickSort(), `dj/Uk
new MergeSort(), _ p?q/-[4
new ImprovedMergeSort(), {}>"f]3
new HeapSort() s#d>yx_b
}; bT8BJY%+
Vbwbc5m}
public static String toString(int algorithm){ MHgS5b2
return name[algorithm-1]; >`6^1j(3
} g'mkhF(
lRO4- y
public static void sort(int[] data, int algorithm) { ftK.jj1:
impl[algorithm-1].sort(data); }$b/g
} /WM : Bj
>CYg\vas!
public static interface Sort { i4->XvC
public void sort(int[] data); V,>#!zUv
} / {A]('t
BkIvoW_
public static void swap(int[] data, int i, int j) { "Uyw7
int temp = data; Q,s,EooIx
data = data[j]; <H$CCo
data[j] = temp; 8x+K4B"oe
} >Vn!kN6\
} H#1/H@I#