[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; L}pt)w*V1j
} W@I|Q -
int i1=l; Zo~
int i2=mid+1; m+T;O/lG0{
for(int cur=l;cur<=r;cur++){ e-EUf
if(i1==mid+1) D1=((`v '
data[cur]=temp[i2++]; mUikA9u5=
else if(i2>r) Z'7
data[cur]=temp[i1++]; P`cq H(
else if(temp[i1] data[cur]=temp[i1++]; ?BZPwGMs
else TtTj28k7
data[cur]=temp[i2++]; j=r P:#
} @pRlxkvV
} tu66'z
*(T:,PY
} /$p6'1P8
y#z
改进后的归并排序: m0a?LY
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package org.rut.util.algorithm.support; gq'Y!BBQy
#ZrHsfP
import org.rut.util.algorithm.SortUtil; ) iN/ua
YOmM=X+'H
/** 7Bd-!$j+
* @author treeroot IHv[v*4:
* @since 2006-2-2 9^#c| 0T
* @version 1.0 7%|~>
*/ J`].:IOh
public class ImprovedMergeSort implements SortUtil.Sort { oUQ,61H
^Xq 6:
private static final int THRESHOLD = 10; %UERc{~o*,
e9U9Uu[
/* HOJs[mqB%
* (non-Javadoc) `3WFjU5a
* P"8~$ P#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kr9*,E9cv
*/ %|q>pin2
public void sort(int[] data) { oF1,QQ^dg
int[] temp=new int[data.length]; D!Pq4'd(
mergeSort(data,temp,0,data.length-1); 0vD7v
} S]Mw#O|
ic#`N0s?
private void mergeSort(int[] data, int[] temp, int l, int r) { VKG&Y_7N
int i, j, k; ijK"^4i
int mid = (l + r) / 2; 'R'*kxf
if (l == r) V8C:"UZ;
return; pUQ/03dp
if ((mid - l) >= THRESHOLD) ($;77fPR
mergeSort(data, temp, l, mid); `-J%pEIza
else ZJzt~ H
insertSort(data, l, mid - l + 1); afuOeZP
if ((r - mid) > THRESHOLD) _4U5
mergeSort(data, temp, mid + 1, r); ?kH8Lw~{5W
else qh|_W(`y
insertSort(data, mid + 1, r - mid); xRzFlay8
1q:2\d]
for (i = l; i <= mid; i++) { Tz8PSk1[
temp = data; v50bdj9}k
} #mCL) [
for (j = 1; j <= r - mid; j++) { bB1UZ O
temp[r - j + 1] = data[j + mid]; Vr`R>S,-
} NflD/q/ L
int a = temp[l]; \F/hMXDlJ
int b = temp[r]; x7!L{(E3
for (i = l, j = r, k = l; k <= r; k++) { %\dz m-d(C
if (a < b) { <66X Xh.
data[k] = temp[i++]; 7e|s wJ>4
a = temp; 0zlb0[
} else { |@ s,XS
data[k] = temp[j--]; C.Kh[V\Ut
b = temp[j]; i]YV {
} %,}A@H,
} 8QLj["
} C'.L20qW
Bn#?zI
/** j7$e28|_n
* @param data !sQY&*
* @param l ZojIR\F^
* @param i ff,pvk8N5
*/ _VRpI)mu
private void insertSort(int[] data, int start, int len) { Vt %bI0#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5HkKurab
} 5 ZGNz1)?V
} jjw`Dto&
} }@'$b<!B
} ]6(N@RC
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堆排序： a!7A_q8M
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package org.rut.util.algorithm.support; VM GS[qrG
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import org.rut.util.algorithm.SortUtil; !;Yg/'vD-
cl=EA6P\X
/** aQ?/%\>
* @author treeroot 5\5/
* @since 2006-2-2 Y)0*b5?1r
* @version 1.0 DS.RURzd{r
*/ A}G7l?V&
public class HeapSort implements SortUtil.Sort{ dMf:h"7
8<S~Z:JK
/* (non-Javadoc) lYVz3p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4B =7:r
*/ nm5cpnNl
public void sort(int[] data) { *4Thd:7 `
MaxHeap h=new MaxHeap(); ?I_s0k I
h.init(data); %GjM(;Tk
for(int i=0;i h.remove(); p{amC ;cI$
System.arraycopy(h.queue,1,data,0,data.length); =9'RM>
} 9YIM'q>`v
:~e>Ob[,"
private static class MaxHeap{ +Mo9kC
tZ:_ag)o
void init(int[] data){ Pk{_(ybaY
this.queue=new int[data.length+1]; :|V$\!o'U
for(int i=0;i queue[++size]=data; \HxT@UQ)~
fixUp(size); ]qethaNy
} [,t*Pfq'W8
} gPNZF\ r
(6?9BlH~
private int size=0; q>_/u"
.zA^)qgL
private int[] queue; twL3\ }N/B
=x%dNf$e{W
public int get() { 2h|MXI\g
return queue[1]; b#uL?f
} @| M|+k3
@Lpq~ 1eZB
public void remove() { \\PjKAsh
SortUtil.swap(queue,1,size--); $UMFNjL
fixDown(1); Ygm`ZA y
} 1-%fo~!l
file://fixdown a,@]8r-"
private void fixDown(int k) { >:AARx%
int j; XX7{-Yy
while ((j = k << 1) <= size) { {@H6HqD
if (j < size %26amp;%26amp; queue[j] j++; yzbx .
if (queue[k]>queue[j]) file://不用交换 CJ/X}hi,
break; *W4m3Lq
SortUtil.swap(queue,j,k); 9_# >aOqL
k = j; 7`-Zuf
} J`peX0Stl
} 3 R=,1<
private void fixUp(int k) { `YFtL
while (k > 1) { 4x{0iav
int j = k >> 1; ~bM4[*Q7
if (queue[j]>queue[k]) oRm L {UDZ
break; 0LPig[
SortUtil.swap(queue,j,k); 3QV*%
k = j; nHnK)9\N
} A;;fACF8e
} ciFmaM.
q!{y&.&\
} 35Ij ..z0
|'.*K]Yp
} 1Ce@*XBU
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SortUtil： r54&XE]O
!POl;%\
package org.rut.util.algorithm; Buf/@B7+\
RY]#<9>M
import org.rut.util.algorithm.support.BubbleSort; `>7;!
import org.rut.util.algorithm.support.HeapSort; chcbd y>C
import org.rut.util.algorithm.support.ImprovedMergeSort; PXK7b2fE.
import org.rut.util.algorithm.support.ImprovedQuickSort; 6_J$UBT
import org.rut.util.algorithm.support.InsertSort; ^Ew]uN>,
import org.rut.util.algorithm.support.MergeSort; 8UXjm_B^'
import org.rut.util.algorithm.support.QuickSort; @)UZ@ ~R
import org.rut.util.algorithm.support.SelectionSort; 8ZM?)#`@{
import org.rut.util.algorithm.support.ShellSort; 5m*iE*+
WQ~;;.v#
/** <Y*+|T+&d
* @author treeroot :=}US}H$
* @since 2006-2-2 Upc+Ukw
* @version 1.0 j>*R]mr6
*/ k52/w)Ro,$
public class SortUtil { )bS~1n_0
public final static int INSERT = 1; wF IegC(
public final static int BUBBLE = 2; q$ZHd
public final static int SELECTION = 3; S'|,oUWDb
public final static int SHELL = 4; ?zeJ#i
public final static int QUICK = 5; ^WHE$4U`
public final static int IMPROVED_QUICK = 6; o>).Cj
public final static int MERGE = 7; @E;=*9ek{u
public final static int IMPROVED_MERGE = 8; 4iqoR$3Fc
public final static int HEAP = 9; LIS)(X<]?
9%8"e>~
public static void sort(int[] data) { *EOdEFsR/
sort(data, IMPROVED_QUICK); na#CpS;pc
} qIVx9jNN
private static String[] name={ -l`f)0{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "oTHq]Ku
}; WB?jRYp
OP~HdocB
private static Sort[] impl=new Sort[]{ )T/0S$@
new InsertSort(), G^~k)6v=m
new BubbleSort(), x^HGVWw_
new SelectionSort(), SFB~ ->db
new ShellSort(), hU(umL<
new QuickSort(), :V1W/c
new ImprovedQuickSort(), MC?,UDNd%
new MergeSort(), "w^!/
new ImprovedMergeSort(), #D<C )Q
new HeapSort() ql<i]Y
}; cWEE%
XF Patd
public static String toString(int algorithm){ UM!ENI|
return name[algorithm-1]; !2 LCLN\
} EqyeJq .
@E^~$-J5j
public static void sort(int[] data, int algorithm) { ~;QvWS
impl[algorithm-1].sort(data); z8jk[5z
} 3[\iQ*d }B
J{l1nHQZSu
public static interface Sort { )hd@S9Z.Y
public void sort(int[] data); VCu{&Sh*
} u6M.'
g$7{-OpB
public static void swap(int[] data, int i, int j) { B268e
int temp = data; $$D}I*^Dt
data = data[j]; G'rxXJq
data[j] = temp; VGfMN|h
} Q~814P8]
} oeKHqP wg