[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; _/ Uer}
} '}eA2Q>BV
int i1=l; ]6 ]Nr
int i2=mid+1; ~*,e&I
for(int cur=l;cur<=r;cur++){ o$,Dh?l
if(i1==mid+1) pswEIa
data[cur]=temp[i2++]; +`H{
else if(i2>r) MY `V0
data[cur]=temp[i1++]; =ijVT_|u0
else if(temp[i1] data[cur]=temp[i1++]; {s/u[T_D2
else s@c.nT%BYL
data[cur]=temp[i2++]; 4|[)D/N
} Q!_@Am"h
} Y;[#~3CA
pJpTOq\h
} 6V@?/B
4RYvI!
改进后的归并排序: &z"sT*3
'HdOW[3o
package org.rut.util.algorithm.support; +f- E8q
ehCZhi~
import org.rut.util.algorithm.SortUtil; =u^{Jvl[
ttaYtV]]
/** gQ@fe3[
* @author treeroot IFg(Ze~
* @since 2006-2-2 0`L>t
* @version 1.0 `aw5"ns^V
*/ V;}6C&aP.
public class ImprovedMergeSort implements SortUtil.Sort { etHkyF
|f.R]+cH
private static final int THRESHOLD = 10; [)&(zJHX
uI*2}Q
/* 4H\+vJPM
* (non-Javadoc) Q|`sYm'.
* ==z,vxr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m{)F9F
*/ IT~pp_6g
public void sort(int[] data) { [8J/#!B
int[] temp=new int[data.length]; VP<_~OLc
mergeSort(data,temp,0,data.length-1); Vg+jF!\7
} MCcWRbE5#
TnvX&Y'
private void mergeSort(int[] data, int[] temp, int l, int r) { h5.>};"@'
int i, j, k; D\H)uV`
int mid = (l + r) / 2; HSR^R
if (l == r) ]1XJQW@gF
return; 'n)]"G|
if ((mid - l) >= THRESHOLD) {hLS,Me
mergeSort(data, temp, l, mid); JTxHM?/G
else @4Ox$M
insertSort(data, l, mid - l + 1); JN Ur?+g
if ((r - mid) > THRESHOLD) A]FjV~PB
mergeSort(data, temp, mid + 1, r); 8@f=GJf
else 0y"Ra%Y
insertSort(data, mid + 1, r - mid); pM^r8kIH
EZ.|6oug\
for (i = l; i <= mid; i++) { #)r
temp = data; NzP5s&,C69
} %z_PEqRj
for (j = 1; j <= r - mid; j++) { B-<H8[GkG1
temp[r - j + 1] = data[j + mid]; ,/qS1W(
} .<!Jhf$
int a = temp[l]; 3%JPJuNVw
int b = temp[r]; Zu$30&U
for (i = l, j = r, k = l; k <= r; k++) { >c~Fgs
if (a < b) { XSu9C zx&I
data[k] = temp[i++]; 8u401ddg
a = temp; "s6O|=^*
} else { $ +`
data[k] = temp[j--]; t&r-;sH^[
b = temp[j]; 5DHFxym'
} E_aDkNT
} nEZoF
} 1i.t^PY
]Y%?kQ^
/** c&Mci"nj0
* @param data \>@'wl
* @param l Mpm#a0f
* @param i &s|&cT
*/ g]=w_
private void insertSort(int[] data, int start, int len) { X\I"%6$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 483BrFV
} !Ol>![
} %D(% lh2
} {~"&$DY2
} 7yU<!p?(
.{-&3++WZ
堆排序： Yxal%
`dH[&=S
package org.rut.util.algorithm.support; uqhNi!;
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import org.rut.util.algorithm.SortUtil; PQmgv&!DP
6wzTX8
/** s uT#k3
* @author treeroot >-s\$8En'
* @since 2006-2-2 A;t6duBDf/
* @version 1.0 >f [Lb|t
*/ Zhl}X!:c?\
public class HeapSort implements SortUtil.Sort{ Z/-!-
9Blc
/* (non-Javadoc) `7|\Gqy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MCOz-8@|Y
*/ p/|":(U
public void sort(int[] data) { \X5>HPB
MaxHeap h=new MaxHeap(); 'J&&F2O%
h.init(data); ,[To)x5o
for(int i=0;i h.remove(); SBBDlr^P
System.arraycopy(h.queue,1,data,0,data.length); -q9`Btz
} niZ/yW{w
\($EYhx
private static class MaxHeap{ sv<U$M~)X
D8otUDB{
void init(int[] data){ ':kj\$U
this.queue=new int[data.length+1]; RO-ABFEi(
for(int i=0;i queue[++size]=data; P +U=/$o
fixUp(size); 7-nz'-'
} CU3[{a
} }MKm>N
E>j*m}b
private int size=0; y{~l&zrl
y*,3P0*z
private int[] queue; 6~Y-bn"%D5
JzA`*X[
public int get() { IS;F9{
return queue[1]; nu{bEp
} XG fLi
-lM4*+f
public void remove() { p&wXRI
SortUtil.swap(queue,1,size--); $gsn@P>"
fixDown(1); 6Sh0%Fs
} ipB*]B F[
file://fixdown ]| oh1q
private void fixDown(int k) { |A_yr/f
int j; 5}3Q}o#
while ((j = k << 1) <= size) { krkRP%jy
if (j < size %26amp;%26amp; queue[j] j++; _ukKzY
if (queue[k]>queue[j]) file://不用交换 S$q:hXZ#e
break; ,5jE9
SortUtil.swap(queue,j,k); HFD5*Z~M
k = j; ,bRvj8"M
} \/C-e
} ^E&':6(
private void fixUp(int k) { ag*RQ
while (k > 1) { y0vo-)E]-]
int j = k >> 1; {s}@$rW
if (queue[j]>queue[k]) ?pdvFM
break; k36%n *4
SortUtil.swap(queue,j,k); <>,V>k|
k = j; b?-Ep?G'\
} [m7jZOEu
} wrq0fHwM
Q7O8']~n
} D'e'xU
0R~{|RHM
} EJP##eGx
mBgMu@zt)
SortUtil： :&Xy#.un
is`Eqcj`dr
package org.rut.util.algorithm; yu~~"Rq)
^YzFEu$
import org.rut.util.algorithm.support.BubbleSort; :70cOt~Z
import org.rut.util.algorithm.support.HeapSort; E<;C@B
import org.rut.util.algorithm.support.ImprovedMergeSort; 1,fjdd8OM;
import org.rut.util.algorithm.support.ImprovedQuickSort; ot P7;l
import org.rut.util.algorithm.support.InsertSort; HaI
import org.rut.util.algorithm.support.MergeSort; ) 'x4#5]
import org.rut.util.algorithm.support.QuickSort; ;Dg8>
import org.rut.util.algorithm.support.SelectionSort; Z+ [Nco
import org.rut.util.algorithm.support.ShellSort; NZ`W`#{
g9OO#C>
/** |S#)[83*3
* @author treeroot {'8a'9\
* @since 2006-2-2 zRsG$)B
* @version 1.0 DWDL|4 og
*/ Gc}d#oo*k
public class SortUtil { SLRQ3<0W_
public final static int INSERT = 1; }./__gJ
public final static int BUBBLE = 2; h0`@yo
public final static int SELECTION = 3; Jla ;^X
public final static int SHELL = 4; vsg"!y@v
public final static int QUICK = 5; *,!6#Z7
public final static int IMPROVED_QUICK = 6; GYYk3\r
public final static int MERGE = 7; !u)veh3x
public final static int IMPROVED_MERGE = 8; T:S+Pt~
public final static int HEAP = 9; U}(*}Ut
nE)?P*$3Z
public static void sort(int[] data) { =p|,~q&i
sort(data, IMPROVED_QUICK); i[A$K~f
} <e|I?zI9-
private static String[] name={ u$d T^c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %{s<h6{R
}; HjUs}#</
k8w }2Vw
private static Sort[] impl=new Sort[]{ MHJH@$|]
new InsertSort(), &^^zm9{
new BubbleSort(), hkeOe
new SelectionSort(), h\afO
new ShellSort(), AjB-&Z
new QuickSort(), PvX>+y5
new ImprovedQuickSort(), hrPm$`
new MergeSort(), 4M'y9(
new ImprovedMergeSort(), 4vcUHa|4
new HeapSort() !},_,J~(|
}; _] veTAV
w=I8f}(
public static String toString(int algorithm){ C]K|;VQ
return name[algorithm-1]; !8M]n
} vL(7|K
eS9uKb5n(
public static void sort(int[] data, int algorithm) { ^2}0lP|
impl[algorithm-1].sort(data); gtWJR
} $+qJ#0OE$
pTPWToKh
public static interface Sort { 0\84~t'[
public void sort(int[] data); >.N?y@
} z6#~B&
7<DlA>(oUX
public static void swap(int[] data, int i, int j) { G4][`C]8c
int temp = data; oF[l<OY4
data = data[j]; 6tBL?'pG
data[j] = temp; jFfuT9oId
} `+cc{k
} ,,vl+Z<&