[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; ,`32!i
} *#y;8
int i1=l; M"{uX
int i2=mid+1; /4$4h;_8
for(int cur=l;cur<=r;cur++){ 8!mc@$Z
if(i1==mid+1) Ri#H.T<'
data[cur]=temp[i2++]; xY\0zQ
else if(i2>r) r[_4Lo@G
data[cur]=temp[i1++]; 1zftrX~v!X
else if(temp[i1] data[cur]=temp[i1++]; $Z?\>K0i
else ,Q/Ac{C
data[cur]=temp[i2++]; %+-C3\'
} :!fG; )=
} g> S*<
\*0yaSQF
} e-5?p~>
M2@b1;
改进后的归并排序: ir16
]"~51HQZ
package org.rut.util.algorithm.support; %."@Q$lA
&|Pu-A"5~
import org.rut.util.algorithm.SortUtil; Z5(enTy-
;heHefbvvd
/** }fR,5|~X
* @author treeroot 7=XL!:P
* @since 2006-2-2 }_ mT l@*
* @version 1.0 }(XdB:C8
*/ 8|Y.|\
public class ImprovedMergeSort implements SortUtil.Sort { =Gk/k}1
<spZ! #o
private static final int THRESHOLD = 10; sZ&G%o
_7T@5\b:;
/* P u0uKE
* (non-Javadoc) L,,*gK
* ULH0'@BJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CjIu[S1%
*/ V DS23Bo
public void sort(int[] data) { 76cG90!Z
int[] temp=new int[data.length]; RW$:9~
mergeSort(data,temp,0,data.length-1); $,>@o=)_
} '1^B+m
YW\0k5[
private void mergeSort(int[] data, int[] temp, int l, int r) { &sXRN&Fp
int i, j, k; CSPKP#,B0[
int mid = (l + r) / 2; y! .J
if (l == r) -u!FOD/
return; YW@#91.
if ((mid - l) >= THRESHOLD) YwY74w:
mergeSort(data, temp, l, mid); c#IYFTz
else #@@Mxr'F
insertSort(data, l, mid - l + 1); dC\ZjZZ
if ((r - mid) > THRESHOLD) *=V7@o
mergeSort(data, temp, mid + 1, r); 38DT2<qC
else cRd0S*QN2
insertSort(data, mid + 1, r - mid); 54-#QIx|
5]I|DHmu
for (i = l; i <= mid; i++) { p Dx-2:}
temp = data; ^EG\iO2X
} AcI,N~~
for (j = 1; j <= r - mid; j++) { ")O`mXg-
temp[r - j + 1] = data[j + mid]; K{b(J Nd
} G7--v,R1x
int a = temp[l]; -/{4Jf Wf
int b = temp[r]; M?b6'd9f
for (i = l, j = r, k = l; k <= r; k++) { ,QzL)W7
if (a < b) { t#%R q
data[k] = temp[i++]; C2Xd?d
a = temp; 1]IQg;q
} else { 7eWk7&Xul
data[k] = temp[j--]; '13ZX:
b = temp[j]; V $z} K
} h/B>S
} .9md~j:o^s
} ={LMdC~5X
,g%&|FAP
/** dlhdsj:
* @param data *@d&5
* @param l T3`ludm^u
* @param i []a[v%PkG
*/ /axIIfx-
private void insertSort(int[] data, int start, int len) { oB74y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 22f`LoM
} hXqD<?
} ,+~rd4a
} ]4;PR("aU
} aW!@f[%~F
NPFpq,P>
堆排序： p~*UpU8u
sP^R/z|Y
package org.rut.util.algorithm.support; 5jUYN-$GO
Gs3LB/8?
import org.rut.util.algorithm.SortUtil; 4)1s M=u
i hh/sPi
/** $H+VA@_
* @author treeroot Ur*6Gi6
* @since 2006-2-2 rXA*NeA3v
* @version 1.0 XS$OyW_Q
*/ q$aaA`E%
public class HeapSort implements SortUtil.Sort{ B" 3dQwQ
3Kn_mL3V-
/* (non-Javadoc) S{Er?0wm.R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qG<$Ajiin
*/ sqW* pi
public void sort(int[] data) { fJ ,1Ef;Z
MaxHeap h=new MaxHeap(); @r?Uua
h.init(data); U*3uq7
for(int i=0;i h.remove(); _U/!4A
System.arraycopy(h.queue,1,data,0,data.length); clk[/'1
} C*`mM'#
aXL{TD:]
private static class MaxHeap{ a<@N-Exr
P LueVz
void init(int[] data){ Qci4J
this.queue=new int[data.length+1]; O)"gS!,
for(int i=0;i queue[++size]=data; SCz(5[MZJ
fixUp(size); 0@EwM
} ?.YOI.U^
} 3mOtW%Hl
i@4~.iZ8
private int size=0; eQ&ZX3*}
v;0|U:`]
private int[] queue; (<)]sp2
AGbhJ=tB
public int get() { LU9A#
return queue[1]; RoyPrO [3
} ,13Lq-
R%'^gFk8
public void remove() { |<GDUwC_;
SortUtil.swap(queue,1,size--); =Jym%m
fixDown(1); n-%s8aaVf
} o0pII )v
file://fixdown 9[^gAR
private void fixDown(int k) { p1|f<SF')
int j; kP?KXT3y
while ((j = k << 1) <= size) { M`l.t -ut
if (j < size %26amp;%26amp; queue[j] j++; p8]68!=W\F
if (queue[k]>queue[j]) file://不用交换 *;fw%PW
break; Oj^,m.R
SortUtil.swap(queue,j,k); V?=8".GiX
k = j; X0n~-m"m
} Mv6-|O
} P<f5*L#HD
private void fixUp(int k) { OdB?_.+$
while (k > 1) { /=gOa\k|p
int j = k >> 1; kJ Mf
if (queue[j]>queue[k]) 1SR+m>pL
break; u6bXv(
SortUtil.swap(queue,j,k); {1b Zg
k = j; %!PM&zV
} <0PT"ij
} 7Ddaf>
$n^gmhp
} I:d[Q s
uIDuGrt
} $.[#0lCI
}eRD|1
SortUtil： (bh95X
,qYJioWX
package org.rut.util.algorithm; YR;^hs?
1M}&ZH
import org.rut.util.algorithm.support.BubbleSort; `ck$t5:6sp
import org.rut.util.algorithm.support.HeapSort; .({smN,B
import org.rut.util.algorithm.support.ImprovedMergeSort; P'O#I}Dmw<
import org.rut.util.algorithm.support.ImprovedQuickSort; C|o`k9I#
import org.rut.util.algorithm.support.InsertSort; z$kenhFG/
import org.rut.util.algorithm.support.MergeSort; oI#a_/w
import org.rut.util.algorithm.support.QuickSort; H8'Z#"h
import org.rut.util.algorithm.support.SelectionSort; Jzp#bgq}|
import org.rut.util.algorithm.support.ShellSort; u3o#{~E/#
fa<v0vb+
/** tyDM'|p
* @author treeroot j8sH#b7Z
* @since 2006-2-2 leQT-l2Bk
* @version 1.0 e~"fn*"
*/ s\P2Bp_{
public class SortUtil { @_LN3zP
public final static int INSERT = 1; is@b&V]
public final static int BUBBLE = 2; %zOh
public final static int SELECTION = 3; EKzAd
public final static int SHELL = 4; <~)kwq'
public final static int QUICK = 5; "kA*Vc#
public final static int IMPROVED_QUICK = 6; A.5i"Ci[ie
public final static int MERGE = 7; cDI [PJ9
public final static int IMPROVED_MERGE = 8; e0$=!QlPr
public final static int HEAP = 9; W mm4hkf
b%Eei2Gm%
public static void sort(int[] data) { T =2=k&|
sort(data, IMPROVED_QUICK); xrN &N_K#
} i>joT><B
private static String[] name={ x1BobhU~Zl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O%ug@& S{
}; ":nQgV\9
G!XIc>F*
private static Sort[] impl=new Sort[]{ 2"-S<zM
new InsertSort(), `w.AQ?p@
new BubbleSort(), @l0|*lo%
new SelectionSort(), 84{Q\c
new ShellSort(), l]]l
new QuickSort(), ~QZ"Z tu
new ImprovedQuickSort(), -!8(bjlJ&
new MergeSort(), oQL59XOT4
new ImprovedMergeSort(), /NFz4h=>
new HeapSort() ^`D=GF^tX
}; 42\-~]
sk|=% }y
public static String toString(int algorithm){ A?*o0I
return name[algorithm-1]; PG]%Bv57
} c~o+WI Ym
!(t,FYeH
public static void sort(int[] data, int algorithm) { nL?oTze*p
impl[algorithm-1].sort(data); Tb1U^E:
} p\Lq}tk<
P5gN#G
public static interface Sort { @WKzX41'
public void sort(int[] data); ?J,AB #+
} ]p!Gt,rYq
|D.O6?v@
public static void swap(int[] data, int i, int j) { T,_(?YJW
int temp = data; <A.W 8b7D
data = data[j]; DSxUdEK6
data[j] = temp; s[Ur~Wvn
} wl1m*`$
} R3X{:1{j