[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; ?[@J8
} f .Q\Z'S^
int i1=l; j[`j9mM8
int i2=mid+1; n^Hm;BiE#
for(int cur=l;cur<=r;cur++){ NQBpX
if(i1==mid+1) s}w{:Hk,x8
data[cur]=temp[i2++]; h2Ld[xvCu%
else if(i2>r) )J2mM
data[cur]=temp[i1++]; gbF+WE
else if(temp[i1] data[cur]=temp[i1++]; ?}wk.gt>
else #M9~L[nFS
data[cur]=temp[i2++]; "I3@m%qv
} $"+djI?E9
} B3We|oe!
-ws? "_w
} \k.{-nh
B<5R
改进后的归并排序: X{5vXT\/y
S\:P-&dC
package org.rut.util.algorithm.support; ZP@ $Q%up
wPQH(~k:
import org.rut.util.algorithm.SortUtil; cG[l!Z
0)Uce=t`
/** (SpX w,:
* @author treeroot +"rDT1^V
* @since 2006-2-2 \UPjf]&
* @version 1.0 _Gn2o2T
*/ Y~c|hfL
public class ImprovedMergeSort implements SortUtil.Sort { J\+0[~~
B^4&-z2|
private static final int THRESHOLD = 10; E{XH?_xo
kZR8a(4D
/* HVi'eNgo
* (non-Javadoc) +ieY:H[
* 3O,+=?VK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TrlZ9?3#D
*/ mWoAO@}Y
public void sort(int[] data) { o} J&E{Tk
int[] temp=new int[data.length]; s^Y"'`+
mergeSort(data,temp,0,data.length-1); $Q&lSVQ
} K'L^;z6
mk;&yh
private void mergeSort(int[] data, int[] temp, int l, int r) { 94h]~GqNi
int i, j, k; &v56#lG
int mid = (l + r) / 2; [4YTDEv%
if (l == r) XW[j!`nlk
return; `F-/QX[:
if ((mid - l) >= THRESHOLD) Oxm>c[R
mergeSort(data, temp, l, mid); LhA*F[6$M
else 6</xL9#/
insertSort(data, l, mid - l + 1); zBCtd1Xrni
if ((r - mid) > THRESHOLD) A 9( x
mergeSort(data, temp, mid + 1, r); 3x`|
else "un]Gc
insertSort(data, mid + 1, r - mid); VLOO8N[o
zwhe
for (i = l; i <= mid; i++) { Luq#9(P
temp = data; Ur9?Td'*>
} D9<!mH
for (j = 1; j <= r - mid; j++) { &*##bA"!B
temp[r - j + 1] = data[j + mid]; <fZyAa3}
} ?^7t'`zk
int a = temp[l]; aRj9E}
int b = temp[r]; $Ipg&`S"
for (i = l, j = r, k = l; k <= r; k++) { Njxv4cc
if (a < b) { *w|:~g
data[k] = temp[i++]; @@R7p
a = temp; ,BH@j%Jmy
} else { = I:.X ;
data[k] = temp[j--]; nL5cK:
b = temp[j]; m,VOx7%n
} X$HIVxyq2
} y^;#&k!
} M||+qd W!
1#C4;3i,
/** 0]'7_vDs|
* @param data (jnQ -
* @param l %P<hW+P!
* @param i 0pK=o"^?@
*/ |9uOUE
private void insertSort(int[] data, int start, int len) { g,Lq)'N;O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pM+ AjPr
} \MA+f~)9
} ERUz3mjA/
} ,$@bE
} ^&B@Uw5{
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堆排序： h`]Iy
./-5R|fN
package org.rut.util.algorithm.support; {ME2ImD
oL!EYbFD'Z
import org.rut.util.algorithm.SortUtil; 5-|:^hU9
Us)Z^s
/** <->{
* @author treeroot o15-ZzE-
* @since 2006-2-2 "~#3&3HVS
* @version 1.0 N,`$M.|?
*/ ,KF'TsFf
public class HeapSort implements SortUtil.Sort{ #pT"BSz]
Vrjc~>X
/* (non-Javadoc) *U^6u/iH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $3W;=Id=+
*/ _64A(U
public void sort(int[] data) { Za/-i"U
MaxHeap h=new MaxHeap(); /@wg>&L]
h.init(data); DjCqh-&L
for(int i=0;i h.remove(); `EEL1[:BR
System.arraycopy(h.queue,1,data,0,data.length); q2/pNV#
} rxVanDb=W
9`T)@Uj2n
private static class MaxHeap{ !Xh=k36
g$":D
void init(int[] data){ #9B)Xx!g
this.queue=new int[data.length+1]; J; 3{3
for(int i=0;i queue[++size]=data; O%Scjm-^X
fixUp(size); y_'Ub{w
} j5QuAU8
} .sxcCrQE
O)C\vF#
private int size=0; zE336
hP=WFD&
private int[] queue; 1[mXd
xj<Rp|7&
public int get() { G|[=/>~B
return queue[1]; .\\DKh%
} _mzW'~9wN
aKV$pC<[o
public void remove() { Htay-PB }
SortUtil.swap(queue,1,size--); e2L0VXbb
fixDown(1); 6}Vf\j~
} 9 3U_tQ&1?
file://fixdown nxY\|@
private void fixDown(int k) { $CxKuB(
int j; BIb4h
while ((j = k << 1) <= size) { $Ad{Z
if (j < size %26amp;%26amp; queue[j] j++; Eav[/cU
if (queue[k]>queue[j]) file://不用交换 2`AY~i9
break; ucuSe!IcX
SortUtil.swap(queue,j,k); :lX!\(E2
k = j; H;D>|q
} Qwz}B
} v&Ii^?CvO
private void fixUp(int k) { f& 0M*o,)
while (k > 1) { .0p0_f=
int j = k >> 1; ZWii)0'PV
if (queue[j]>queue[k]) t#yk->,
break; O1rvaOlr
SortUtil.swap(queue,j,k); NWP5If|'X
k = j; LnFdhrB@x
} 7WZrSC
} B5gj_^
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} tN[L@t9#cr
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} #mlS}~n
Hh%I0#
SortUtil： Jx_cf9{
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package org.rut.util.algorithm; ,K>I%_!1
y6@0O%TDN
import org.rut.util.algorithm.support.BubbleSort; Q0$8j-1I
import org.rut.util.algorithm.support.HeapSort; T`/AY?#
import org.rut.util.algorithm.support.ImprovedMergeSort; sI43@[
import org.rut.util.algorithm.support.ImprovedQuickSort; OBgkpx*Q
import org.rut.util.algorithm.support.InsertSort; 6T>mW#E&
import org.rut.util.algorithm.support.MergeSort; Y4%:7mw~=
import org.rut.util.algorithm.support.QuickSort; DDvh4<Hk
import org.rut.util.algorithm.support.SelectionSort; 'z );
import org.rut.util.algorithm.support.ShellSort; TvwZW!@jc
Z<U6<{b
/** `+`Z7
* @author treeroot I\hh8abAp
* @since 2006-2-2 l_3`G-`2
* @version 1.0 ,t}vz 7
*/ -_ I_W&
public class SortUtil { kM!kD4&
public final static int INSERT = 1; d; [C6d
public final static int BUBBLE = 2; ?8HHA:GP
public final static int SELECTION = 3; "-y-iJ
public final static int SHELL = 4; < |e,05aM
public final static int QUICK = 5; p$SX
public final static int IMPROVED_QUICK = 6; r)qnl9?;`]
public final static int MERGE = 7; "vA}FV%tRq
public final static int IMPROVED_MERGE = 8; jnd[6v=C7-
public final static int HEAP = 9; <DpevoF
8][nmjk0
public static void sort(int[] data) { X$%'
sort(data, IMPROVED_QUICK); XV!6dh!
} }{M#EP8q+
private static String[] name={ kSC}aN'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >AC]#'
}; "X2Vrn'
-\+s#kE:
private static Sort[] impl=new Sort[]{ ~L]|?d"
new InsertSort(), |].pDwgt
new BubbleSort(), \Fl+\?~D
new SelectionSort(), h"lX4
new ShellSort(), $GYm6x\4
new QuickSort(), QS0:@.}$E)
new ImprovedQuickSort(), ( Wa
new MergeSort(), l|xZk4@_uE
new ImprovedMergeSort(), Xsa2(-
new HeapSort() Q*~LCtrI
}; Yv hA_v
r$5i Wu
public static String toString(int algorithm){ K )[]fm
return name[algorithm-1]; rL/H2[d
} Gn&-X]Rrl
_,q)hOI
public static void sort(int[] data, int algorithm) { UU'|Xz9~
impl[algorithm-1].sort(data); YNYx>Ue
} ttXXy3G#
.id)VF-l
public static interface Sort { L93l0eEt
public void sort(int[] data); *Kyw^DI
} ~+bv6qxg]\
8iW;y2qF
public static void swap(int[] data, int i, int j) { ?P4w]a
int temp = data; 0- ><q
data = data[j]; pnMEB,)
data[j] = temp; MzPzqm<
} hbU+Usx
} -yR.<KnL