[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; GP1>h.J
} :=L[kzX
int i1=l; !P Gow
int i2=mid+1; H5RHA^p|
for(int cur=l;cur<=r;cur++){ Y)u}+Yg
if(i1==mid+1) SbnVU[
data[cur]=temp[i2++]; 3}:pD]`h
else if(i2>r) 0v7;ZxD
data[cur]=temp[i1++]; 2K*-uT#$~
else if(temp[i1] data[cur]=temp[i1++]; IVNNiNN*5
else paBGJ~{=
data[cur]=temp[i2++]; el|t6ZT*
} Z `\7B e
} ^}1RDdQ"U
oh@r0`J]x
} RO.(k!J .
g[M@
改进后的归并排序: T4!]^_t^
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package org.rut.util.algorithm.support; <Z8] W1)
Ic=V:
import org.rut.util.algorithm.SortUtil; _Mt:^H}Sy
)ql?}
/** }ZmdX^xB
* @author treeroot UdI>x 4bI
* @since 2006-2-2 DpS6>$v8t
* @version 1.0 .sG,TLE[<
*/ ONjc},_
public class ImprovedMergeSort implements SortUtil.Sort { O[L8(+Sn
'6 'XBL?
private static final int THRESHOLD = 10; {hg$?4IyQ
c&Zm>Qo[
/* g?$9~/h :;
* (non-Javadoc) }"&(sYQ*`
* Ro1' L1:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^,KR0
*/ FoG<$9
public void sort(int[] data) { 5nj~RUK
int[] temp=new int[data.length]; b<( W}$x
mergeSort(data,temp,0,data.length-1); )(L&+DDy
} <@vE3v;
.FXQ,7mZ-
private void mergeSort(int[] data, int[] temp, int l, int r) { twu6z5<!-=
int i, j, k; ppnj.tLz;r
int mid = (l + r) / 2; p 5o;Rvr
if (l == r) KFs` u6
return; Q~@8t"P
if ((mid - l) >= THRESHOLD) 9bNIaC*M
mergeSort(data, temp, l, mid); cY"^3Ot%^
else *tO<wp&
insertSort(data, l, mid - l + 1); B)Q'a3d#
if ((r - mid) > THRESHOLD) a,4g`?
mergeSort(data, temp, mid + 1, r); V]O :;(W_
else Ur-^X(nL
insertSort(data, mid + 1, r - mid); _N:h&uw
u=l(W(9=
for (i = l; i <= mid; i++) { .)3 2WD%
temp = data; {;}8Z$
} sR9F:
for (j = 1; j <= r - mid; j++) { Ii,:+o%
temp[r - j + 1] = data[j + mid]; p_AV3
} $KKaA{0-
int a = temp[l]; W^N"y&
int b = temp[r]; +i>q;=~
for (i = l, j = r, k = l; k <= r; k++) { *@& "MZ/M
if (a < b) { 1wgu%$|d
data[k] = temp[i++]; Yq^y"rw
a = temp; -&EmEXs%
} else { ( 7?%Hg
data[k] = temp[j--]; !:t9{z{Ixg
b = temp[j]; |i`@!NrFL
} E&+^H on
} 6-=_i)kzq
} }gW}Vr <
mCGcM^21-x
/** uf^:3{1
* @param data 0|ps),
* @param l ?},ItJ#>)q
* @param i 1;P\mff3Y
*/ `aUp&8{
private void insertSort(int[] data, int start, int len) { +o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1pb;A;F,A
} }SV3PdE
} Y2X1!Em>B
} rxK0<pWJhx
} QRlzGRueR&
2f!oA~|2
堆排序： [tzSr=,Cg
L)}V[j#
package org.rut.util.algorithm.support; vVYduvw
0'hxw3#
import org.rut.util.algorithm.SortUtil; !_ Q!H2il
OQ7c|O
/** MI(i%$R-A
* @author treeroot ^I{]Um:
* @since 2006-2-2 $t$f1?
* @version 1.0 `&_k\/
*/ kkBU<L2
public class HeapSort implements SortUtil.Sort{ $/TA5h
<S$21NtM87
/* (non-Javadoc) ~It+|X=Kx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z5Ihc%J^
*/ C[nr>
public void sort(int[] data) { LH#LBjOZk
MaxHeap h=new MaxHeap(); " B{0-H+
h.init(data); WWcm(q=
for(int i=0;i h.remove(); X-$td~r
System.arraycopy(h.queue,1,data,0,data.length); k6L373e#Q
} iwJ-<v_:h
`^-Be
private static class MaxHeap{ +~Lzsh"
&H1D!N
void init(int[] data){ +g6j=%
this.queue=new int[data.length+1]; ^Cn]+0G#C8
for(int i=0;i queue[++size]=data; ?gwbg*
fixUp(size); R%_H\-wo
} 0a6@HwO
} @Q\$dneY
2Lekckgv
private int size=0; 7Y|>xx=v
o>;0NF| }
private int[] queue; &IEBZB\/+&
$t# ,'M
public int get() { }0*ra37z>
return queue[1]; &@utAuI
} &9dr+o-(~
06 Esc^D
public void remove() { 8+|V!q
SortUtil.swap(queue,1,size--); hf^`at
fixDown(1); k\&IFSp
} n+\Cw`'<H
file://fixdown bC4*w O
private void fixDown(int k) { [{p?BTs
int j; 4a.e ,gitf
while ((j = k << 1) <= size) { y~c4:*L3
if (j < size %26amp;%26amp; queue[j] j++; HvgK_'
if (queue[k]>queue[j]) file://不用交换 BdB`
break; Hrg=sR
SortUtil.swap(queue,j,k); b|ksMB>)
k = j; TQ\wHJ
} v(@+6#&
} zGL<m0C
private void fixUp(int k) { iWN.3|r
while (k > 1) { `b#nC[b6|v
int j = k >> 1; _/%]:
if (queue[j]>queue[k]) F{*9[jY
break; G9'YgW+$7
SortUtil.swap(queue,j,k); oY2?W
k = j; )-9w3W1r
} xL39>PB
} 8A8xY446)
3 !>L?
} lQ<#jxp
J!A/r<
} qSC~^N`
3h[:0W!C]
SortUtil： wwK~H
DNm7z[t{
package org.rut.util.algorithm; R(/[NvUb
8!&ds~?
import org.rut.util.algorithm.support.BubbleSort; 6Y>,e;R
import org.rut.util.algorithm.support.HeapSort; *3F /Ft5
import org.rut.util.algorithm.support.ImprovedMergeSort; x<{;1F,k3
import org.rut.util.algorithm.support.ImprovedQuickSort; P$(WdVG
import org.rut.util.algorithm.support.InsertSort; 4iYKW2a
import org.rut.util.algorithm.support.MergeSort; N.5KPAvg%
import org.rut.util.algorithm.support.QuickSort; HoIKx_
import org.rut.util.algorithm.support.SelectionSort; XC7Ty'#"KX
import org.rut.util.algorithm.support.ShellSort; <(#xOe
CSG+bqUG
/** ~.4W,QLuD
* @author treeroot wcdW72
* @since 2006-2-2 B{OW}D$P#
* @version 1.0 Jv 6nlK`
*/ X]zCTY=l
public class SortUtil { {m_A1D/_
public final static int INSERT = 1; 1IOo?e=/bM
public final static int BUBBLE = 2; nCffBc
public final static int SELECTION = 3; `Ct'/h{
public final static int SHELL = 4; u5cVz_S
public final static int QUICK = 5; .-('C> @
public final static int IMPROVED_QUICK = 6; NRHr6!f>
public final static int MERGE = 7; ]/ZA/:Oa+
public final static int IMPROVED_MERGE = 8; zqekkR]
public final static int HEAP = 9; r6F{
`x%U
public static void sort(int[] data) { ^Txu~r0@
sort(data, IMPROVED_QUICK); pPiYPfs
} q9W~7
private static String[] name={ bk\dy7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;xW8Z<\-
}; #Dj"W8'zh
?Kx6Sf<i
private static Sort[] impl=new Sort[]{ 95.qAFB1
new InsertSort(), cW81
new BubbleSort(), R/ALR
new SelectionSort(), z9k*1:
new ShellSort(), b"ol\&1 #
new QuickSort(), r,`Z.A
new ImprovedQuickSort(), ShL1'Z}^{
new MergeSort(), ]~j_N^oZ1X
new ImprovedMergeSort(), (*Gi~?-
new HeapSort() L?=#*4t
}; 6)=](VmNL`
hw&ke$Fg#
public static String toString(int algorithm){ ONjC(7
return name[algorithm-1]; rmY,v
} XysFwi
bDciZ7[b
public static void sort(int[] data, int algorithm) { m!HC-[<
impl[algorithm-1].sort(data); ;,v!7
} s"I-YFP%c
_-4n~(
public static interface Sort { ^?$D.^g
public void sort(int[] data); @wd!&%yzO
} y;,=ajrF
3+CSQb8
public static void swap(int[] data, int i, int j) { K(-G: |
int temp = data; Nj0-`j0E
data = data[j]; ~mN g[]
data[j] = temp; :.C+?$iuX
} -rEeKt
} 8ku? W