[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; nP)-Y#`~7
} QQ|9>QP
int i1=l; ;S=e%:zb
int i2=mid+1; V9]uFL
for(int cur=l;cur<=r;cur++){ |vN$"mp^a
if(i1==mid+1) "j;!_v>=f`
data[cur]=temp[i2++]; k7[)g]u
else if(i2>r) / GZV_H%v
data[cur]=temp[i1++]; :O#gJob-%s
else if(temp[i1] data[cur]=temp[i1++]; OAyE/Q|
else ?(M\:`G'
data[cur]=temp[i2++]; [M2Dy{dh
} oG9SO^v_
} D2-O7e
L%4tw5*N
} C$0ITw
.?7So3
改进后的归并排序: t9n'!
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package org.rut.util.algorithm.support; *Ag,kW"
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import org.rut.util.algorithm.SortUtil; otZ JY)
vKV{ $|
/** (BhL/A 4
* @author treeroot ^:$j:w?j
* @since 2006-2-2 5[hlg(eb
* @version 1.0 )%1&/uN)
*/ M{y|7e%K
public class ImprovedMergeSort implements SortUtil.Sort { P:vX }V |[
k.ww-nH
private static final int THRESHOLD = 10; gGD]t;<u
[/n'@cjNZ
/* _c,&\ wl$
* (non-Javadoc) LDSbd,GF
* yl|R:/2V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aGe\.A=
*/ Pyit87h{
public void sort(int[] data) { r]Z.`}Kkm
int[] temp=new int[data.length]; |oB]6VS`
mergeSort(data,temp,0,data.length-1); [kQ"6wh8
} y& Gw.N}<r
;vZ*,q6
private void mergeSort(int[] data, int[] temp, int l, int r) { ug>]U ~0
int i, j, k; E,Dlaq
int mid = (l + r) / 2; (rMTW+,
if (l == r) R7y-#?
return; `jt(DKB+J
if ((mid - l) >= THRESHOLD) zh?xIpY
mergeSort(data, temp, l, mid); o<Ke3?J\
else 8~rT
insertSort(data, l, mid - l + 1); .jy)>"h0
if ((r - mid) > THRESHOLD) $::51#^Wg
mergeSort(data, temp, mid + 1, r); y0lLFe~
else SlM>";C\
insertSort(data, mid + 1, r - mid); :1%VZvWk*
y;*My#
for (i = l; i <= mid; i++) { AZ]Z,s6
temp = data; C5d/)aC
} 4t"*)xy
for (j = 1; j <= r - mid; j++) { !$4Q]@ }
temp[r - j + 1] = data[j + mid]; ei(|5h
} R#rh
int a = temp[l]; \Gv-sA
int b = temp[r]; s"gKonwI2
for (i = l, j = r, k = l; k <= r; k++) { 15RI(BN
if (a < b) { Hd96[Uo
data[k] = temp[i++]; iFXUKGiV
a = temp; 4d,qXSKty
} else { h:eN>yW
data[k] = temp[j--]; r< N-A?a
b = temp[j]; &*h`b{]
} ~r7DEy|+
} "`H=AX0
} >IR`]
Sf#\6X<B
/** |8b$x| B
* @param data n C\(+K1%
* @param l =aX1:Z
* @param i OsDp88Bc
*/ bUpmU/RW
private void insertSort(int[] data, int start, int len) { f4qS OVv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w`w `q'
} \f~u85
} >:(6{}b
} =Td#2V;0
} #h}IUR
OpbszSl"y
堆排序： h/fb<jIP1
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package org.rut.util.algorithm.support; hPNQGVv
_%C_uBLi
import org.rut.util.algorithm.SortUtil; G*kXWEx
mCZF5r
/** O#<|[Dzw
* @author treeroot +Px<DX+
* @since 2006-2-2 LL6ON }
* @version 1.0 )4VLm
*/ OoA5!HEh
public class HeapSort implements SortUtil.Sort{ ?}!gLp
5G dY7t_1
/* (non-Javadoc) t\E-6u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y'i:%n}I
*/ bF8xQ<i~Y
public void sort(int[] data) { t(LlWd
MaxHeap h=new MaxHeap(); ^$T!@+:
h.init(data); .F=<r-0
for(int i=0;i h.remove(); ^loF#d=s
System.arraycopy(h.queue,1,data,0,data.length); |R:v<
} 3/#R9J#
BdRE*9.0
private static class MaxHeap{ _AsHw
o>QFdx
void init(int[] data){ DT1i2!
this.queue=new int[data.length+1]; H@OrX
for(int i=0;i queue[++size]=data; C_g"omw40
fixUp(size); rA>A=,
} fS'k;r*r
} +A.a~Stt
@8x6#|D
private int size=0; 3e!a>Gl*
UlLM<33_)
private int[] queue; JXD?a.vy^q
$TH'"XK
public int get() { O_%PBgcJr
return queue[1]; J_((o
} EzeDShN=J
0YTtA]|`4
public void remove() { -sGWSC
SortUtil.swap(queue,1,size--); f"OA Zji
fixDown(1); hIg, 0B
} LgD{!
file://fixdown ?Pok-90
private void fixDown(int k) { c=U$$|qHV
int j; Wtzj;GJj
while ((j = k << 1) <= size) { $=S'#^Z
if (j < size %26amp;%26amp; queue[j] j++; #xJGuYdv
if (queue[k]>queue[j]) file://不用交换 R)DNFc:
break; IJb1) ZuR
SortUtil.swap(queue,j,k); CzDR%vx
k = j; 3 MI) E
} EY[Q%
} ~*Sbn~U
private void fixUp(int k) { %I2xK.8=
while (k > 1) { 2 |kH%
int j = k >> 1; AcfkY m~
if (queue[j]>queue[k]) X?k V1
break; 7T(OV<q;#
SortUtil.swap(queue,j,k); O'yjB$j
k = j; ")[Q4H;V
} ]oWZ{#r2
} :6Pc m3
#|*,zIYo
} Eg-Mm4o
Osvz 3UMY3
} c#4L*$ViF
PU/Br;2A
SortUtil： "3KSmb
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package org.rut.util.algorithm; O%q;,w{prW
O|7{%5h
import org.rut.util.algorithm.support.BubbleSort; Ns(L1'9=
import org.rut.util.algorithm.support.HeapSort; Vlxb<$5Nh
import org.rut.util.algorithm.support.ImprovedMergeSort; yPxG`w'
import org.rut.util.algorithm.support.ImprovedQuickSort; bQ\-6dOtv
import org.rut.util.algorithm.support.InsertSort; g,GbaaXH
import org.rut.util.algorithm.support.MergeSort; q MT.7n:
import org.rut.util.algorithm.support.QuickSort; nAba =iW
import org.rut.util.algorithm.support.SelectionSort; E+m"yQp{
import org.rut.util.algorithm.support.ShellSort; Pk?%PB?Z
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/** aSj1P/A
* @author treeroot hhgz=7Y
* @since 2006-2-2 1&dsQ,VDl
* @version 1.0 Hk~ gcG
*/ :`"T Eif
public class SortUtil { +` Y ?-
public final static int INSERT = 1; Ev|{~U
public final static int BUBBLE = 2; TWR#MVMI
public final static int SELECTION = 3; zl0:U2x7
public final static int SHELL = 4; }.|5S+J?[
public final static int QUICK = 5; elHarey`f
public final static int IMPROVED_QUICK = 6; ';CuJXAj
public final static int MERGE = 7; [+cnx21{
public final static int IMPROVED_MERGE = 8; 'LLQ[JJ=O
public final static int HEAP = 9; a]=vq(N'r
?`*-QG}
public static void sort(int[] data) { gW pT:tX-
sort(data, IMPROVED_QUICK); X.4ZLwX=
} 8JOht(m
private static String[] name={ Y1ilH-8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S%gO6&^
}; SlJ/OcAf#
Jc#)T;#6
private static Sort[] impl=new Sort[]{ *Wo$$T
new InsertSort(), t~W4o8<w
new BubbleSort(), %oL&~6l$
new SelectionSort(), SoGLsO+R
new ShellSort(), f]6`GsE
new QuickSort(), 0}7Rm>
new ImprovedQuickSort(), jl0Eg
new MergeSort(), r-Xe<|w
new ImprovedMergeSort(), xS-nO_t 'E
new HeapSort() Nb9V/2c;V
}; ht)*Ync
IEr`6|X
public static String toString(int algorithm){ ,4T$
return name[algorithm-1]; 'e)ze^Jq
} _wJ#jJz2
|ij5c@~&
public static void sort(int[] data, int algorithm) { @`+$d=rO`
impl[algorithm-1].sort(data); gsq[ 9
} f(MHU
LOG*K;v3
public static interface Sort { k@)m-K
public void sort(int[] data); }b\q<sNE{
} y^|3]G3
j%y+W{Q[
public static void swap(int[] data, int i, int j) { l )V43
int temp = data; KXbYv62
data = data[j]; adr^6n6v
data[j] = temp; CZ%"Pqy&1L
} c&?H8G)x
} N4(VRA