[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; Z{#3-O<a+n
} `]19}GK~xo
int i1=l; HtE^7i*_
int i2=mid+1; 438r]f?0|{
for(int cur=l;cur<=r;cur++){ oLlfqV,|L\
if(i1==mid+1) 6yYd~|T.Fl
data[cur]=temp[i2++]; n?q+:P
else if(i2>r) @*6_Rp"@
data[cur]=temp[i1++]; 8>vNa
else if(temp[i1] data[cur]=temp[i1++]; ]-X\n
else 5\JV}
data[cur]=temp[i2++]; c-.F{~
} kMEXgzl
} 3ErV" R4"$
5?(dI9A"K
} i,Jz7OX
T51oNO%^
改进后的归并排序: I-J%yutB
?0z/i^I
package org.rut.util.algorithm.support; Ei<+{P(t0
_m a;b<I/<
import org.rut.util.algorithm.SortUtil; qnd] UUA^
_Y6Ezh.
/** U/v)6:j)4R
* @author treeroot %M^Q{` :5
* @since 2006-2-2 fD_3lbiL(
* @version 1.0 ^pfM/LQ@
*/ 8"ZcKxDk
public class ImprovedMergeSort implements SortUtil.Sort { oz3!%'
f::^zAV
private static final int THRESHOLD = 10; 7:$dl#
Ew{N2
/* ~<Wa$~oY
* (non-Javadoc) +Ezl.O@z
* I(j{D>v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l.}gWN9-
*/ T{#=A$vu
public void sort(int[] data) { ?"}U?m=
int[] temp=new int[data.length]; 0,__{?!
mergeSort(data,temp,0,data.length-1); slr>6o%W`
} U&$I!80.
f e^s`dsG
private void mergeSort(int[] data, int[] temp, int l, int r) { = K`]cEL
int i, j, k; I;$tBgOWq
int mid = (l + r) / 2; DEfhR?v
if (l == r) R iLqMSq
return; n|QA\,=
if ((mid - l) >= THRESHOLD) Cf<TDjU`|
mergeSort(data, temp, l, mid); xw1,Wbu]
else EW)r/Av:,
insertSort(data, l, mid - l + 1); cZWW[i
if ((r - mid) > THRESHOLD) 4l/~::y
mergeSort(data, temp, mid + 1, r); <X97W\
else +@@( C9
insertSort(data, mid + 1, r - mid); 5':j=KQE_
<P Vmr2Jp"
for (i = l; i <= mid; i++) { q}g0-Da
temp = data; VF7H0XR/k5
} >Mm.MNU
for (j = 1; j <= r - mid; j++) { zRau/1Y0
temp[r - j + 1] = data[j + mid]; %uP/v\l
} h{)`W ]~
int a = temp[l]; n2F*a
int b = temp[r]; AMK3I`=8WO
for (i = l, j = r, k = l; k <= r; k++) { N=8CVI
if (a < b) { to\$'2F"q
data[k] = temp[i++]; QX(t@VP
a = temp; k.Z?BNP
} else { f,-'eW/j
data[k] = temp[j--]; cZt5;"xgr]
b = temp[j]; D9r;Ys%
} 4tapQgj24
} q| *nd!y'
} ^M1O)
xkaed
/** f+c{<fX
* @param data L#_QrR6Sny
* @param l W;,RU8\f
* @param i w;Pe_m7\EO
*/ `-rtU
private void insertSort(int[] data, int start, int len) { bXHtw}n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :{xu_"nYr
} .d4&s7n0
} ]b^bc2:
} ` -<S13
} z`8>$9
I?<ibLpX
堆排序： kf)s3I/`(
O=Vj*G,
package org.rut.util.algorithm.support; 23zR0z(L
DEzL]1;P
import org.rut.util.algorithm.SortUtil; fvDcE]_%H
BUsAEwM
/** baf@"P9@\A
* @author treeroot @y# u!}
* @since 2006-2-2 _x7>d:C
* @version 1.0 _1\H{x
*/ qJj5_
public class HeapSort implements SortUtil.Sort{ g aXF3v*j
p*Hf<)}
/* (non-Javadoc) C2J@]&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @v}M\$N?
*/ .-p?skm=a
public void sort(int[] data) { o6:p2W
MaxHeap h=new MaxHeap(); (Z>vbi%
h.init(data); PF;`mdi-,
for(int i=0;i h.remove(); !=+hU/e
System.arraycopy(h.queue,1,data,0,data.length); YW-Ge
} S3/Z]?o
EPeV1$
private static class MaxHeap{ }Ot2; T
54&&=NVs|
void init(int[] data){ RYX=;n
this.queue=new int[data.length+1]; <$'FTv
for(int i=0;i queue[++size]=data; 0OVxx>p/x
fixUp(size); HG})VPBa
} 9'\*Ip^
} SL%lY
I[v~nY~l`
private int size=0; l8!n!sC[,
=ThacZHb8
private int[] queue; _&F*4t!n_
6q^.Pg-Y
public int get() { sX=_|<[
return queue[1]; lem\P_V)
} WAh{*$Rpl
*s"{JrG`O
public void remove() { "V7&@3
SortUtil.swap(queue,1,size--); 0-A@X>6bs
fixDown(1); ).>O6A4:C
} ,N5-(W
file://fixdown -B#>Jn#F
private void fixDown(int k) { & Pzr)W(
int j; '[Ch8Yf\
while ((j = k << 1) <= size) { E.rfS$<1
if (j < size %26amp;%26amp; queue[j] j++; ob>2SU[Y
if (queue[k]>queue[j]) file://不用交换 &1Idv}@!
break; I=yy I
SortUtil.swap(queue,j,k); q\\52:\
k = j; H9T'{R*FC
} X9n},}bJ"
} cH\.-5NQ
private void fixUp(int k) { rc]`PV
while (k > 1) { .^* .-8q
int j = k >> 1; OLxiY r
if (queue[j]>queue[k]) ^T/d34A;SP
break; w#`E;fN'
SortUtil.swap(queue,j,k); /=ro$@
k = j; '|l1-yD_
} 4P}<86xk
} q%GlS=o"
o%=OBTh_
} TW?A/GoXI
Ny)!uqul*
} FQCz_z
V@Fj!/
SortUtil： 2AI~Jm#
M2e_)f:
package org.rut.util.algorithm; 'IroQ M
ojZvgF
import org.rut.util.algorithm.support.BubbleSort; V,)bw
import org.rut.util.algorithm.support.HeapSort; =;^#5dpt$
import org.rut.util.algorithm.support.ImprovedMergeSort; Zo|# ,AdE>
import org.rut.util.algorithm.support.ImprovedQuickSort; 3]}wZY0
import org.rut.util.algorithm.support.InsertSort; Kr|9??`0E
import org.rut.util.algorithm.support.MergeSort; re\&'%~K
import org.rut.util.algorithm.support.QuickSort; Vi1= E])
import org.rut.util.algorithm.support.SelectionSort; x*uQBNf=
import org.rut.util.algorithm.support.ShellSort; oefhJM!y
F%pYnHr<
/** op|/_I$
* @author treeroot n[pW^&7x
* @since 2006-2-2 v-mhqhb
* @version 1.0 @'{m-?*
*/ q}mQm'
public class SortUtil { U(cV#@Y
public final static int INSERT = 1; A~Ov(
public final static int BUBBLE = 2; X8(, ,>_
public final static int SELECTION = 3; @e_<OU
public final static int SHELL = 4; =tE7XC3X_
public final static int QUICK = 5; \d#|n u
public final static int IMPROVED_QUICK = 6; jN43vHm\Y9
public final static int MERGE = 7; 7Z+4F=2ff
public final static int IMPROVED_MERGE = 8; m.A_u7D@
public final static int HEAP = 9; 1FiFP5
K7H`Yt
public static void sort(int[] data) { (\<#fkeH
sort(data, IMPROVED_QUICK); CPCjY|w7
} .A`Q!
private static String[] name={ 2'zYrdem
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B&E qd
}; y9OxPq.Cy
0HRLTgIC
private static Sort[] impl=new Sort[]{ <Prz>qL$
new InsertSort(), ?|t9@r
new BubbleSort(), syYe0~
new SelectionSort(), d)&}% 2ku
new ShellSort(), pO.+hy
new QuickSort(), s*k[Fbi
new ImprovedQuickSort(), 3"Y |RSy
new MergeSort(), N>S_Vgk}
new ImprovedMergeSort(), xu _:
new HeapSort() X)^kJ`
}; ?UlAwxn
J`*!U4
public static String toString(int algorithm){ b]Xc5Dp{
return name[algorithm-1]; ,dM}B-
} { ke}W
mPy=,xYyC
public static void sort(int[] data, int algorithm) { @3hA\3ot^
impl[algorithm-1].sort(data); pPNU0]/
} "Y Z B@
{>E`Zf:
public static interface Sort { &cEQ6('H
public void sort(int[] data); wua`e <"
} INFbj8T
O]SjShp
public static void swap(int[] data, int i, int j) { `is."]%f
int temp = data; !z7j.u`Y
data = data[j]; i,DnXgmz@
data[j] = temp; k<098F
} mBC?Pg
} SW ^F