[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; J]lrS
} nRL. ppUI
int i1=l; x+ncc_2n&D
int i2=mid+1; B~]5$-
for(int cur=l;cur<=r;cur++){ Qd}m`YW-f$
if(i1==mid+1) 7w,FX.=;cv
data[cur]=temp[i2++]; VVH.2&`I
else if(i2>r) Unj.f>U
data[cur]=temp[i1++]; 00v&lQBW
else if(temp[i1] data[cur]=temp[i1++]; 0.T4{JS#
else u0aJu
data[cur]=temp[i2++]; lO&3{dOYE
} {;toI
} 5pr"d@.
+/,icA}PI
} _vSn`
drzL.@h|
改进后的归并排序: :I -V_4b
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package org.rut.util.algorithm.support; NI#X@
mMsTyM-f
import org.rut.util.algorithm.SortUtil; +zXEYc
]8q3>
/** pyLRgD0 g
* @author treeroot kB?al#`
* @since 2006-2-2 'WaPrCw@Mf
* @version 1.0 5` Te\H
*/ mxb(<9O
public class ImprovedMergeSort implements SortUtil.Sort { g?-lk5
|f~@8|MQP+
private static final int THRESHOLD = 10; 3)-/`iy#
j83p)ido
/* u6>?AW1~
* (non-Javadoc) G!K]W:m
* hX`}Q4(k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )*4fzo
*/ dJT]/g
public void sort(int[] data) { |D, +P
int[] temp=new int[data.length]; @d Jr/6Yx
mergeSort(data,temp,0,data.length-1); nJ~drG}TD
} ;"(foY"L
f|O{#AC
private void mergeSort(int[] data, int[] temp, int l, int r) { o-}R?>
int i, j, k; :ba5iMa
int mid = (l + r) / 2; 2M#r]
if (l == r) 311LC cRp
return; :Ad&$eg+
if ((mid - l) >= THRESHOLD) t#q<n:WeYU
mergeSort(data, temp, l, mid); pZ/>[TP(%F
else !rqF}d
insertSort(data, l, mid - l + 1); /~x"wo
if ((r - mid) > THRESHOLD) EEGy!bff
mergeSort(data, temp, mid + 1, r); ZPbpp@,
else nstUMr6
insertSort(data, mid + 1, r - mid); yAoe51h?
LpR3BP@At
for (i = l; i <= mid; i++) { `rf_7
temp = data; +$oF]OO
} ]\7]%(
for (j = 1; j <= r - mid; j++) { Eb=}FuV
temp[r - j + 1] = data[j + mid]; ^Z:~91Tv-_
} jDQZQ NS
int a = temp[l]; ^f# FI&
int b = temp[r]; os/vtyP:a
for (i = l, j = r, k = l; k <= r; k++) { ,o)d3g-&g
if (a < b) { %-d]X{J:
data[k] = temp[i++]; 76u&EG%
a = temp; `uC@nJ
} else { Pp )3(T:
data[k] = temp[j--]; 6/rFHY2q
b = temp[j]; X7s `U5'l
} ^tXJj:wtS
} zbq@pj)Qu
} 6R=W}q4
y~)1 1]'>
/** aH^RoG}
* @param data &^W|iXi#
* @param l I1PuHf Qs
* @param i =}.EY iD
*/ m9/}~Y#k
private void insertSort(int[] data, int start, int len) { m=YU2!Mb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K_dOq68_
} DZi!aJ
} o865(<p
} 5}`_x+$%(`
} M)U{7c$c7
dPhQ :sd>
堆排序： -|E!e.^7:
OoWyPdC+P
package org.rut.util.algorithm.support; .k,kTr$S
)I3NeKWz
import org.rut.util.algorithm.SortUtil; o<N nV
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/** TYy.jFT-
* @author treeroot V{JAB]?^
* @since 2006-2-2 ,T2G~^0
* @version 1.0 -;'1^
*/ R)c'#St
public class HeapSort implements SortUtil.Sort{ gvLf|+m
U~pV)J
/* (non-Javadoc) P>Ez'C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )kP5u`v
*/ '_V2!?+RU+
public void sort(int[] data) { t^w"w`v\u
MaxHeap h=new MaxHeap(); p\bDY
h.init(data); ~$~5qwl
for(int i=0;i h.remove(); p\<u6v ~J
System.arraycopy(h.queue,1,data,0,data.length); %"P,1&\^
} Dc_yM
@;'o2
private static class MaxHeap{ 1PpyVf
qzTuxo0B
void init(int[] data){ )a-Du$kd
this.queue=new int[data.length+1]; "sG=wjcw^
for(int i=0;i queue[++size]=data; E@ESl0a;
fixUp(size); .FLy;_f+
} qTqwPWW*
} rwI
Sv +IS
private int size=0; OVV]x{
NgY=&W,
private int[] queue; ll C#1
:53)Nv
public int get() { nVi[
return queue[1]; q#s,-uu
} !TUrQ
,gS;m &!'J
public void remove() { m&?#;J|B$
SortUtil.swap(queue,1,size--); +u3=dj"[
fixDown(1); Z /9>
} Nd;Ku6
file://fixdown v61[.oS
private void fixDown(int k) { ia MUsa{
int j; <"_d]?,
while ((j = k << 1) <= size) { IyPwP*A
if (j < size %26amp;%26amp; queue[j] j++; :AE&Ny4
if (queue[k]>queue[j]) file://不用交换 <>8WQn,K
break; c`o7d)_Ke
SortUtil.swap(queue,j,k); }b-g*dn]5
k = j; ~x|F)~:0=
} uH(f$A
} s{$(*_
private void fixUp(int k) { D ^x-^6^
while (k > 1) { w/kt3Lw
int j = k >> 1; ](s'L8(x
if (queue[j]>queue[k]) 6*3.SGUY
break; RS^lKJ1 U
SortUtil.swap(queue,j,k); L>3x9
k = j; eN^qG 42
} 43@{JK9G
} /\hzb/
HbxL:~:}J
} m8o(J\]
]]*7\ :cb
} D/Mi^5H)
*#C+iAF|)'
SortUtil： lk( }-
v~^{{O
package org.rut.util.algorithm; $GTU$4u
Zd')57{
import org.rut.util.algorithm.support.BubbleSort; c|#8T*`C
import org.rut.util.algorithm.support.HeapSort; dzDqZQY$
import org.rut.util.algorithm.support.ImprovedMergeSort; v^1pN>#%g
import org.rut.util.algorithm.support.ImprovedQuickSort; +w+}b^4
import org.rut.util.algorithm.support.InsertSort; r_-_a(1R:
import org.rut.util.algorithm.support.MergeSort; {PVWD7
import org.rut.util.algorithm.support.QuickSort; 4/wa+Y+=vt
import org.rut.util.algorithm.support.SelectionSort; ,d{"m)r<
import org.rut.util.algorithm.support.ShellSort; iy%ZQ[Un
dfij|>:*0
/** `a2n:F
* @author treeroot J{k79v
* @since 2006-2-2 -$dXE+&
* @version 1.0 e=+?K5q{P(
*/ 7*?}:
public class SortUtil { Mw;sLsu
public final static int INSERT = 1; 2u5|8
public final static int BUBBLE = 2; i*@<y/&'
public final static int SELECTION = 3; iT%} $Lu~
public final static int SHELL = 4; yc?a=6q'm
public final static int QUICK = 5; }#n;C{z2e
public final static int IMPROVED_QUICK = 6; .n~M(59
public final static int MERGE = 7; Np"exFqN k
public final static int IMPROVED_MERGE = 8; j'HZ\_
public final static int HEAP = 9; Bq$rf < W
t({W [JL
public static void sort(int[] data) { D?NbW @]
sort(data, IMPROVED_QUICK); #6CC3TJ'k
} [D<1CF
private static String[] name={ a+%6B_|\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :(M(>4t
}; ybY]e; v*O
ZOZ+Y\uU
private static Sort[] impl=new Sort[]{ eep1I :N
new InsertSort(), T-U}QM_e
new BubbleSort(), ~NpA".PB
new SelectionSort(), A}3=561F?5
new ShellSort(), Vz=PiMO
new QuickSort(), -(~!Jo_*'
new ImprovedQuickSort(), $7rq3y
new MergeSort(), z}*9uZ
new ImprovedMergeSort(), -De9_0#R
new HeapSort() U G~ba
}; }<9cL'
TzNn^ir=HX
public static String toString(int algorithm){ $3s@}vLd
return name[algorithm-1]; '*"vkgN
} NnT1X;0W
*1fb}C_
public static void sort(int[] data, int algorithm) { % a@>_
impl[algorithm-1].sort(data); w%JTTru
} i? K|TC`
=5(>q5Z*
public static interface Sort { $w);5o
public void sort(int[] data); {M^3m5.^
} RT.D"WvT
-UOj>{-
public static void swap(int[] data, int i, int j) { "O%gFye
int temp = data; MP4z-4Y
data = data[j]; ZHm7Isa1
data[j] = temp; }MH0L#Tu
} )|DM~%$QM
} `s8{C b=}1