[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; PE7D)!d T
} 'A}@XGE:p
int i1=l; Sph:OX8
int i2=mid+1; $^XCI%DH
for(int cur=l;cur<=r;cur++){ {G^f/%
if(i1==mid+1) 3%'Y):
data[cur]=temp[i2++]; q4wS<,3
else if(i2>r) XzH"dDAVE
data[cur]=temp[i1++]; LE1#pB3TG
else if(temp[i1] data[cur]=temp[i1++]; F]4JemSjK
else QT\=>,Fz _
data[cur]=temp[i2++]; ( ;(DI^Un8
} Tz"Xm/Gy
} x_K8Gr#Z0
'9R.$,N
} $Z2Y%z6y
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改进后的归并排序: ivb?B,Lz0
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package org.rut.util.algorithm.support; q0a8=o"|
I\FBf&~
import org.rut.util.algorithm.SortUtil; 0K*|B.O
0qPbmLMK
/** }+wvZq +c
* @author treeroot -ghmLMS%t
* @since 2006-2-2 zZ11J0UI
* @version 1.0 5?{ytNCY
*/ `Zm-F
public class ImprovedMergeSort implements SortUtil.Sort { #@cOyxUt
HL*Fs /W
private static final int THRESHOLD = 10; $afE= qC*
E/6@>.T?'
/* {"x>ewAf
* (non-Javadoc) 4U1!SR]s
* 9BA*e-[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [IgB78_$
*/ ^ rB7&96C,
public void sort(int[] data) { gq+|Hr
int[] temp=new int[data.length]; S#9EBw7
mergeSort(data,temp,0,data.length-1); &~SPDiu.t
} !9/1_Bjv
z|5Sy.H>
private void mergeSort(int[] data, int[] temp, int l, int r) { s?g`ufF.t
int i, j, k; 2VgDM6h
int mid = (l + r) / 2; d>f.p"B.gj
if (l == r) 0kp#+&)+
return; >cE@m=[
if ((mid - l) >= THRESHOLD) .e,(}_[[<
mergeSort(data, temp, l, mid); A3#^R%2)W
else bx5f\)
insertSort(data, l, mid - l + 1); 3r[}'ba\
if ((r - mid) > THRESHOLD) H}[kit*9
mergeSort(data, temp, mid + 1, r); :nPLQqXGQ
else pg4J)<t#
insertSort(data, mid + 1, r - mid); X^!1MpEQ
0';U3:=i,
for (i = l; i <= mid; i++) { I5$@1+B
temp = data; r{Cbx#;
} 3S97hn{|=
for (j = 1; j <= r - mid; j++) { p903*F^[,
temp[r - j + 1] = data[j + mid]; rpZ^R}B%*v
} Gd]!D~[1
int a = temp[l]; x^J}]5{0
int b = temp[r]; |1@/gqa
for (i = l, j = r, k = l; k <= r; k++) { Bn5O;I13
if (a < b) { \en}8r9cy
data[k] = temp[i++]; dg?[gD8!4&
a = temp; I\|x0D
} else { n> >!dg Og
data[k] = temp[j--]; wy1xZQ<5
b = temp[j]; X4D>
} wP <)
} ]0+5@c
} x<S?"
5dPPm%U{
/** lg(*:To3B
* @param data .YT&V
* @param l O'OVj
* @param i 0CTUcVM#9
*/ E[Rd=/P6
private void insertSort(int[] data, int start, int len) { E`DsRR <
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g20,et
} QQB\$[M!Z
} t.7KS:
} heAbxs
} te 0a6
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堆排序： 'rX!E,59
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package org.rut.util.algorithm.support; u$"dL=s!
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import org.rut.util.algorithm.SortUtil; **%/Ke[
%DKQ
/** 5c W2
* @author treeroot "i}?jf {a
* @since 2006-2-2 !5/jDvh
* @version 1.0 Q|O! cEW/
*/ |Zn|?#F
public class HeapSort implements SortUtil.Sort{ 9qHbV 9,M
[KT'aGK$
/* (non-Javadoc) D(m2^\O[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CflGj0oy8
*/ ~; emUU
public void sort(int[] data) { \G!TC{6
MaxHeap h=new MaxHeap(); "'@iDq%y
h.init(data); cr&sI=i
for(int i=0;i h.remove(); {!$E\e^d
System.arraycopy(h.queue,1,data,0,data.length); iEtnwSt
} L~,x~sLd
mX2(SFpJar
private static class MaxHeap{ /]mfI&l+9
~ PO)>;
void init(int[] data){ <Ag`pZ<s
this.queue=new int[data.length+1]; N<e=!LV
for(int i=0;i queue[++size]=data; '\&t3?;
fixUp(size); z^KMYvH g
} e)Be*J]4
} 4FWb5b!A=
u+&t"B
private int size=0; -UHa;WH
@F+zME
private int[] queue; 7u9]BhcFv?
'`/Qr~]
public int get() { Vm_waa
return queue[1]; U^ecg{
} M[C9P.O%w
E%?X-$a
public void remove() { @Qlh
SortUtil.swap(queue,1,size--); J<<Ph
fixDown(1); XtJ_po
} \fHtk _
file://fixdown lf<?k
private void fixDown(int k) { &L88e\ c+
int j; zNu>25/)(
while ((j = k << 1) <= size) { [SFX;v!9
if (j < size %26amp;%26amp; queue[j] j++; 9L$bJO-3
if (queue[k]>queue[j]) file://不用交换 8f""@TTp
break; JDQ7
SortUtil.swap(queue,j,k); ot"3 3I
k = j; Y5 BWg
} gJkk0wokC
} : J3_g<@
private void fixUp(int k) { LSR{N|h+)
while (k > 1) { +/bT4TkML
int j = k >> 1; Fp_?1y
if (queue[j]>queue[k]) sS 5aJ}Qs
break; l"I G;qO.
SortUtil.swap(queue,j,k); yXuF<+CJ
k = j; MDHTZ94\Q
} oVG/[e|c'
} G(g.~|=EZ
ewOd =%
} zdL"PF
_y,?Cj=u|
} Nq$Xe~,*
q_h=O1W
SortUtil： deRnP$u0
@w%{yzr%
package org.rut.util.algorithm; b,Z\{M:f;F
Kzj9!'0R
import org.rut.util.algorithm.support.BubbleSort; e^N6h3WF
import org.rut.util.algorithm.support.HeapSort; kw%vO6"q(
import org.rut.util.algorithm.support.ImprovedMergeSort; aBBTcN%'
import org.rut.util.algorithm.support.ImprovedQuickSort; }mZsK>
import org.rut.util.algorithm.support.InsertSort; `t@Rh~B
import org.rut.util.algorithm.support.MergeSort; Pjs L{,
import org.rut.util.algorithm.support.QuickSort; bJ~@ k,'
import org.rut.util.algorithm.support.SelectionSort; gc ce]QS
import org.rut.util.algorithm.support.ShellSort; 8&g`Uy/b
lg9`Z>?
/** 9S.J%*F7
* @author treeroot 5IwQ<V
* @since 2006-2-2 WOv m%sX
* @version 1.0 {^Y0kvnd
*/ 8Pkw'.r
public class SortUtil { $KmhG1*s
public final static int INSERT = 1; #RJFJb/
public final static int BUBBLE = 2; sX8?U,u
public final static int SELECTION = 3; 7U@;X~c
public final static int SHELL = 4; U_X/
public final static int QUICK = 5; w7(jSPB
public final static int IMPROVED_QUICK = 6; P?.j wI
public final static int MERGE = 7; lY.{v]i }
public final static int IMPROVED_MERGE = 8; (jV_L1D
public final static int HEAP = 9; "@!B"'xg
o 0-3[W'x<
public static void sort(int[] data) { Cwb}$=p'
sort(data, IMPROVED_QUICK); )kBN]>&R
} i^i^g5l!
private static String[] name={ \-Oq/g{j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /3(|P
}; A6D@#(D
f vAF0 a
private static Sort[] impl=new Sort[]{ -0 e&>H%
new InsertSort(), gbC!>LV
new BubbleSort(), yY3Mv/R
new SelectionSort(), 6r|BiHP
new ShellSort(), =GP~h*5es
new QuickSort(), NoR=:Q 9e
new ImprovedQuickSort(), ~h:/9q
new MergeSort(), @(~m.p|
new ImprovedMergeSort(), eSC69mfD
new HeapSort() p+t79F.js
}; R*DQm
3U_,4qf
public static String toString(int algorithm){ c`F~vrr)X
return name[algorithm-1]; *c0\<BI
} i uNBw]
tn"n~;Bh?:
public static void sort(int[] data, int algorithm) { Hq>"rrVhx
impl[algorithm-1].sort(data); H.n+CR
} }Q=@$YIesD
0Rme}&$
public static interface Sort { uoryxKRjc~
public void sort(int[] data); K|OowM4tv
} ]]InD N
7AOjlC9R}
public static void swap(int[] data, int i, int j) { 2I!L+j_
int temp = data; K F:W:8
data = data[j]; , :10
data[j] = temp; TB8a#bK4
} Q9[$8
} .5t|FJ]`$