[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; {_N,=DQ!
} vE6mOM!_L
int i1=l; ~0$NJrUy
int i2=mid+1; -\ZcOXpMx=
for(int cur=l;cur<=r;cur++){ C`=p+2I]
if(i1==mid+1) r;9 r!$d
data[cur]=temp[i2++]; y4Z&@,_{
else if(i2>r) $CTSnlPq
data[cur]=temp[i1++]; mC&=X6Q]
else if(temp[i1] data[cur]=temp[i1++]; e+v({^k
else yNW\?Z$@q
data[cur]=temp[i2++]; uY_SU-v
} m p<1yY]
} 84HUBud76Y
c0c|z Ym
} ^m#-9-`
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改进后的归并排序: iUMY!eqp
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package org.rut.util.algorithm.support; eAUcv`[#p
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import org.rut.util.algorithm.SortUtil; hc (e$##
0.$hn
/** rWys'uc
* @author treeroot &uP~rEJl+
* @since 2006-2-2 CO-_ea U(
* @version 1.0 U~{du;\
*/ rqv))Zo`
public class ImprovedMergeSort implements SortUtil.Sort { {l_{T4xToB
@uo ~nFj,
private static final int THRESHOLD = 10; Yw5'6NU
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/* i| \6JpNA:
* (non-Javadoc) o:Qv JcB
* mOo`ZcTU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pY4}>ju(g
*/ NC&DFJo
public void sort(int[] data) { A,i75kd
int[] temp=new int[data.length]; &<zd.~N"
mergeSort(data,temp,0,data.length-1); gh`m*@
} `&0Wv0D0
G;> _<22
private void mergeSort(int[] data, int[] temp, int l, int r) { b[z]CP
int i, j, k; jVLA CWH
int mid = (l + r) / 2; }:: S0l
if (l == r) MT(o"ltQ
return; PcB_oG g
if ((mid - l) >= THRESHOLD) f>BWG`
mergeSort(data, temp, l, mid); F4=}}kU
else 8x`.26p
insertSort(data, l, mid - l + 1); xI,2LGO
if ((r - mid) > THRESHOLD) Sxjub&=
mergeSort(data, temp, mid + 1, r); l4T7'U>`
else FZreP.2)!
insertSort(data, mid + 1, r - mid); vVGDDDz/
OY[e.N t&
for (i = l; i <= mid; i++) { Cs2;z:O]
temp = data; ?!qY,9lhH
} wf,7==
for (j = 1; j <= r - mid; j++) { fEB7j-t
temp[r - j + 1] = data[j + mid]; (E,T#uc{
} b~dIk5>O
int a = temp[l]; 2Q;9G6p
int b = temp[r]; 2VW}9O
for (i = l, j = r, k = l; k <= r; k++) { &d7Z6P'`G
if (a < b) { A^Kbsc
data[k] = temp[i++]; +cb6??H
a = temp; .q+0pj
} else { .ROznCe}
data[k] = temp[j--]; v}WR+)uFQ
b = temp[j]; :Hxv6
} .^J2.>.
} Nn>'^KZNG
} =PGs{?+&O
c1X1+b,
/** $mF_,|
* @param data t6v/sZ{F
* @param l ]v+31vdf:O
* @param i XMG]Wf^%\<
*/ \uss Uv
private void insertSort(int[] data, int start, int len) { )M2F4[vcb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z{?G.L*/
} Y8flrM2CwG
} J>d.dq>r
} 5zON}"EC
} 8p[)MiC5W^
Vh>Z,()>>@
堆排序： p~LrPWHSTP
n~VD uKn9
package org.rut.util.algorithm.support; <nEi<iAY>U
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import org.rut.util.algorithm.SortUtil; f6$b s+oP
OtFh,}E
/** zbJT&@z
* @author treeroot iR"N13
* @since 2006-2-2 !!Z?[rj
* @version 1.0 dz Zb
*/ QeF3qXI
public class HeapSort implements SortUtil.Sort{ !?Wp+e6
"Ks,kSEzu
/* (non-Javadoc) +SJd@y@fR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NHlk|Y#6b
*/ )>BHL3@
public void sort(int[] data) { $.]l!cmi%Q
MaxHeap h=new MaxHeap(); 86nN"!{l:
h.init(data); arf8xqR-U]
for(int i=0;i h.remove(); +^;JS3p@\
System.arraycopy(h.queue,1,data,0,data.length); <$JaWL
} _V`DWR *
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private static class MaxHeap{ vm>b m
(h:Rh
void init(int[] data){ nB .G
this.queue=new int[data.length+1]; k5]j.V2f
for(int i=0;i queue[++size]=data; qWb+r
fixUp(size); .bio7c6
} 1^gl}^|B
} Z1"v}g
X.:]=,aGW
private int size=0; $MJm*6h
X1~1&:V,<
private int[] queue; DK}"b}Fvq
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public int get() { {T].]7Z
return queue[1]; D= 7c(
} >t7x>_~
$tl\UH7%2
public void remove() { F:aILx
SortUtil.swap(queue,1,size--); i~r l o^
fixDown(1); z;y:9l
} 3po:xMY
file://fixdown IsR!'%Pu
private void fixDown(int k) { !W?gR.0$=
int j; Kv~U6_=1O
while ((j = k << 1) <= size) { _o8?E&d
if (j < size %26amp;%26amp; queue[j] j++; o=1X^,
if (queue[k]>queue[j]) file://不用交换 J`2"KzR0w"
break; )m. 4i=X
SortUtil.swap(queue,j,k); {5 sO
k = j; m4*@o?Ow
} G z)NwD
} Po%(~ )S>
private void fixUp(int k) { \QB;Ja_
while (k > 1) { a0Zv p>Ft
int j = k >> 1; [+P#tIL
if (queue[j]>queue[k]) jVq(?Gc
break; l}qE 46EL
SortUtil.swap(queue,j,k); ^b %0B
k = j; /7 Cn(s5o
} H*r>Y
} <m'ow
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} ~zw]5|
8,uB8C9
} TjG4`:*y#m
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SortUtil： HJY2#lSha6
CJhL)0Cs
package org.rut.util.algorithm; 3)RsLI9
vY_-Ranj#.
import org.rut.util.algorithm.support.BubbleSort; ZWS`\M
import org.rut.util.algorithm.support.HeapSort; %'T #pz
import org.rut.util.algorithm.support.ImprovedMergeSort; =)7s$ p
import org.rut.util.algorithm.support.ImprovedQuickSort; )(@Hd
import org.rut.util.algorithm.support.InsertSort; twx[s$O'b
import org.rut.util.algorithm.support.MergeSort; zLJ/5&
import org.rut.util.algorithm.support.QuickSort; 1m.W<
import org.rut.util.algorithm.support.SelectionSort; 3g6j?yYqb
import org.rut.util.algorithm.support.ShellSort; ()H:UvM=t
Km^&<3ch#
/** ,\@O(; mF
* @author treeroot J4\qEO
* @since 2006-2-2 h5K$mA5
* @version 1.0 CoA6
*/ Y5j]Z^^v
public class SortUtil { xL" |)A =
public final static int INSERT = 1; I&YSQK:b
public final static int BUBBLE = 2; :GJ &_YHf
public final static int SELECTION = 3; & j+oJasI
public final static int SHELL = 4; M8TSt\
public final static int QUICK = 5; -neKuj
public final static int IMPROVED_QUICK = 6; uAWM\?
public final static int MERGE = 7; Zcc9e03
public final static int IMPROVED_MERGE = 8; `Ry]y"K
public final static int HEAP = 9; LupkrxV
:Q@&5!]>d
public static void sort(int[] data) { +k>.Q0n%m
sort(data, IMPROVED_QUICK); b4pm_Um
} =ha{Ziryo
private static String[] name={ &:7ZQ1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k%G1i-]4
}; Ft!],n-n*
Tq~=TSD
private static Sort[] impl=new Sort[]{ 71{p+3Z&
new InsertSort(), k|!EDze43?
new BubbleSort(), O &-wxJ]S
new SelectionSort(), ]H1I,`=@
new ShellSort(), =3v]gOcO
new QuickSort(), _x5 3g A
new ImprovedQuickSort(), tq|hPd<C
new MergeSort(), @qHNE,K
new ImprovedMergeSort(), $O5UyKI
new HeapSort() X<*U.=r)
}; k Zq!&
.?hP7;hhI
public static String toString(int algorithm){ %p0xM
return name[algorithm-1]; f-71~
} FJ6u.u
w/K_B:s
public static void sort(int[] data, int algorithm) { =i7`ek
impl[algorithm-1].sort(data); v@d
} -Zz$~$
*v3]}g[<
public static interface Sort { MHC^8VL
public void sort(int[] data); O7$hYk
} $ <#KA3o\
x a06i#
public static void swap(int[] data, int i, int j) { QhK#Y{xY
int temp = data; E}tqQ*u
data = data[j]; PxS8 n?y
data[j] = temp; 1[vi.
} [E ]E
} #gcF"L||