[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; :$>Co\D
} VdVUYp
int i1=l; !c;Z<@
int i2=mid+1; 2]$ 7
for(int cur=l;cur<=r;cur++){ ~w&_l57
if(i1==mid+1) x9,X0JO
data[cur]=temp[i2++]; Y"x9B%e
else if(i2>r) KqM!7
data[cur]=temp[i1++]; )&Bf%1>
else if(temp[i1] data[cur]=temp[i1++]; 8f""@TTp
else yc#0c[ZQu
data[cur]=temp[i2++]; Xx=jN1=,
} 8BL]]gT-I
} ?"d25LyN
IfK%i/J
} -2{NIF^H
W+F^(SC\
改进后的归并排序: XIgGE)n
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package org.rut.util.algorithm.support; mHm"QBa!
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import org.rut.util.algorithm.SortUtil; 5#DtaVz
0/1Ay{ns
/** &!@7+'])
* @author treeroot 5gdsV4DH$
* @since 2006-2-2 cZd9A(1"^
* @version 1.0 7S +YQ$_
*/ Gu3# y"a>
public class ImprovedMergeSort implements SortUtil.Sort { TqvgCk-
k>2tC<
private static final int THRESHOLD = 10; pj~Ao+
2MV!@rx
/* kM#ZpI&0%
* (non-Javadoc) sPu@t&$
* %\ifnIQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _(qU%B
*/ 3gUGfedi
public void sort(int[] data) { 0Gq}x;8H&
int[] temp=new int[data.length]; $CgJ+ua\8
mergeSort(data,temp,0,data.length-1); $Ur-Q d
} dx/NY1
h#Z5vH
private void mergeSort(int[] data, int[] temp, int l, int r) { 5Tl3k=o}
int i, j, k; bv%A;
int mid = (l + r) / 2; u_;&+o2
if (l == r) "_g3{[es!
return; y;.U-}e1
if ((mid - l) >= THRESHOLD) 55mDLiA
mergeSort(data, temp, l, mid); M%\=Fb
else F$|Ec9
insertSort(data, l, mid - l + 1); 8hKyp5(%l
if ((r - mid) > THRESHOLD) Y[0
mergeSort(data, temp, mid + 1, r); yY3Mv/R
else /C'dW
insertSort(data, mid + 1, r - mid); z_A:MoYfo
@(~m.p|
for (i = l; i <= mid; i++) { RPXkf71iM
temp = data; R*DQm
} 1L4-hYtCj
for (j = 1; j <= r - mid; j++) { *c0\<BI
temp[r - j + 1] = data[j + mid]; UC u4S >
} B!;qz[]I
int a = temp[l]; )\!-n]+A
int b = temp[r]; l'K3)yQEJ
for (i = l, j = r, k = l; k <= r; k++) { 8,5H^Bi
if (a < b) { 5ree3 quh
data[k] = temp[i++]; Q#,j,h
a = temp; 4X()D {uR
} else { 4!I;U>b b
data[k] = temp[j--]; pejG%pJ
b = temp[j]; pE^jUxk6
} 7jf%-X
} kOQq+_Y
} HxH.=M8S_
9rCvnP=
/** %+1;iuDL
* @param data x+X^K_*
* @param l Me.t_)
* @param i #nzVgV]
*/ uia[>&2
private void insertSort(int[] data, int start, int len) { dV:vM9+x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K<3$>/|
} %.zcE@7*
} cc$L56q
} u`Sg'ro
} iJr 1w&GL$
?eU=xO
堆排序： :.K#=ROP
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package org.rut.util.algorithm.support; 9uRs@]i
o|FY-+
import org.rut.util.algorithm.SortUtil; {|jrYU.k~
PN +<C7/
/** MmvMuX]#)
* @author treeroot 4raKhN"
* @since 2006-2-2 cSkJlhwNn
* @version 1.0 c'678!r9 P
*/ ,J(+%#$UT
public class HeapSort implements SortUtil.Sort{ s*XwU
y*AB=d^
/* (non-Javadoc) ^LO`6,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X`,]@c%C`
*/ d- wbZ)BR
public void sort(int[] data) { Gz>M`M`[4
MaxHeap h=new MaxHeap(); HLPnbI-+
h.init(data); \Jcj4
for(int i=0;i h.remove(); s[ CnJZ\q
System.arraycopy(h.queue,1,data,0,data.length); LMV0:\>
} dV5aIj
xz#.3|_('
private static class MaxHeap{ !JkH$~
N~w4|q!]
void init(int[] data){ 77:s=)
this.queue=new int[data.length+1]; r%QnV0L^
for(int i=0;i queue[++size]=data; 5_d=~whO&2
fixUp(size); XO=UKk+EK
} z_jTR[dY
} p PF]&:&-b
mp{r$tc
private int size=0; I>]t% YKj
WLb*\
private int[] queue; rQ4i%.
zeXMi:X
public int get() { ^w+jPT-n
return queue[1]; T}?vp~./
} f +#
7\q_^
public void remove() { 6Wos6_
SortUtil.swap(queue,1,size--); wc-ll&0Z
fixDown(1); e|L$e0
} BBub'
file://fixdown =uYz4IDB
private void fixDown(int k) { V!'N:je
int j; ]wMp`}$b@L
while ((j = k << 1) <= size) { +UK".
if (j < size %26amp;%26amp; queue[j] j++; 0P5!fXs*
if (queue[k]>queue[j]) file://不用交换 yxECK&&P0#
break; "dKYJ&$
SortUtil.swap(queue,j,k); $jd>=TU|
k = j; "!yKX(aTX
} $ljgFmR_
} ]g>@r.Nc
private void fixUp(int k) { [ imC21U
while (k > 1) { jU#/yM"Y
int j = k >> 1; A~vZ}?*M
if (queue[j]>queue[k]) M!=WBw8Y]a
break; )8c`o
SortUtil.swap(queue,j,k); 4{'0-7}
k = j; a{lDHk`Wf
} q4k)E
} ~IHjj1s
u5f+%!p
} 5(/ 5$u
ZKGS?z
} @-z#vJ5Qe{
2p(M`@
SortUtil： iA~b[20&
w"CcWng1
package org.rut.util.algorithm; fwy-M:
CfMq?.4%E}
import org.rut.util.algorithm.support.BubbleSort; Fr%LV#Q
import org.rut.util.algorithm.support.HeapSort; x8a?I T.
import org.rut.util.algorithm.support.ImprovedMergeSort; gTK5z.]
import org.rut.util.algorithm.support.ImprovedQuickSort; Co2* -[R
import org.rut.util.algorithm.support.InsertSort; wz*QB6QtU
import org.rut.util.algorithm.support.MergeSort; wHW";3w2~
import org.rut.util.algorithm.support.QuickSort; c<V.\y0x
import org.rut.util.algorithm.support.SelectionSort; 2Yx6.e<
import org.rut.util.algorithm.support.ShellSort; ^n@.
\/jr0):
/** bQ-5uFe~$B
* @author treeroot Ejdw"P"
* @since 2006-2-2 ,L+tm>I
* @version 1.0 +#5nk,1c>
*/ e`Xy!@`_
public class SortUtil { Na^1dn
public final static int INSERT = 1; XA~Rn>7&H
public final static int BUBBLE = 2; :&=TE2
public final static int SELECTION = 3; z_#B 4
public final static int SHELL = 4; }>JFO:v&
public final static int QUICK = 5; pti`q)
public final static int IMPROVED_QUICK = 6; QD LXfl/
public final static int MERGE = 7; XD`QU m
public final static int IMPROVED_MERGE = 8; 6h N~<
public final static int HEAP = 9; :GC<U|p
d:0RDK-}s
public static void sort(int[] data) { p\o=fcH%E
sort(data, IMPROVED_QUICK); Y[gj2vNe4g
} J/j1Yf'9
private static String[] name={ pN<wO1\9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w>T1D
}; Lj"~6l`)
b .k J&c
private static Sort[] impl=new Sort[]{ tRYMK+
new InsertSort(), c/ wzV
new BubbleSort(), eL9RrSXz
new SelectionSort(), ]RmQ*F-
new ShellSort(), 88}c+V+N!
new QuickSort(), .+7GecYz
new ImprovedQuickSort(), XM3N>OR.
new MergeSort(), <ns[( Q
new ImprovedMergeSort(), OiX>^_iDt
new HeapSort() #Nxk3He]8
}; lhTjG,U=
%4U;Rdq&Ud
public static String toString(int algorithm){ H,qIHQW#
return name[algorithm-1]; ]#N2:ych
} n6;jIf|
nBL7LocvR
public static void sort(int[] data, int algorithm) { 4VPL -":6
impl[algorithm-1].sort(data); v$"#9oh
} s)"C~w^
g^(wZ$NH
public static interface Sort { ^~(vP:
public void sort(int[] data); xA]CtB*o7
} w4pU^&O
>z6(fM`i
public static void swap(int[] data, int i, int j) { 7]YLe+Ds
int temp = data; aksyr$d0V<
data = data[j]; $78fR8|r-
data[j] = temp; jcQ{,9 H`l
} `pzp(\lc
} Nh~ Hh(