[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; Nd'+s>d0
} XdE#l/#
int i1=l; )#n0~7 &
int i2=mid+1; |TL&#U
for(int cur=l;cur<=r;cur++){ 1DVu`<OXcH
if(i1==mid+1) xS?[v&"2
data[cur]=temp[i2++]; ^ZV1Ev8T6
else if(i2>r) (7^5jo[D
data[cur]=temp[i1++]; 1"?3l`i
else if(temp[i1] data[cur]=temp[i1++]; Sm(X/P=z
else )'3(=F$+l
data[cur]=temp[i2++]; ATl.Qku@
} 9Jd{HI=
} > 2_xRn<P
2k;>nlVxX
} RnC96"";R.
s ;EwAd(
改进后的归并排序: .l5y+a'
8*z)aB&f3
package org.rut.util.algorithm.support; 'X_8j` ]#
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import org.rut.util.algorithm.SortUtil; n6D9f~8"
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/** y|X</3w
* @author treeroot Z BjyQ4h
* @since 2006-2-2 hr3RC+ y
* @version 1.0 %\Dvng6$
*/ dS]TTU1
public class ImprovedMergeSort implements SortUtil.Sort { J&Ig%&/
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private static final int THRESHOLD = 10; x}v]JEIf[Q
gP%S{<.?
/* I/4:SNha
* (non-Javadoc) "2}{lu
* <%w)EQf4m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qd$Y"~Mco
*/ [Q+8Ku
public void sort(int[] data) { iR}3 [
int[] temp=new int[data.length]; _`3'D`s
mergeSort(data,temp,0,data.length-1); }dcXuX4{r
} Age
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private void mergeSort(int[] data, int[] temp, int l, int r) { Ilt!O^
int i, j, k; q"BM*:W
int mid = (l + r) / 2; 7^1yZ1(
if (l == r) >%Rb}Ki4
return; EGpN@
if ((mid - l) >= THRESHOLD) /g$cQ=c
mergeSort(data, temp, l, mid); yF2|w=!
else %]NaHf
insertSort(data, l, mid - l + 1); 6{Y3-Pxg
if ((r - mid) > THRESHOLD) .}IxZM[}D
mergeSort(data, temp, mid + 1, r); ^6R Sbi\
else @ 3n;>oi
insertSort(data, mid + 1, r - mid); -M=#U\D
7|$cM7_r
for (i = l; i <= mid; i++) { #._%~}U
temp = data; .U}"ONd9e
} +9mE1$C
for (j = 1; j <= r - mid; j++) { jw63sn
temp[r - j + 1] = data[j + mid]; @c3GJ'"X
} Rdb[{Ruxb
int a = temp[l]; <X@XbM
int b = temp[r]; n-ZOe]3
for (i = l, j = r, k = l; k <= r; k++) { uu0"k<Tp
if (a < b) { Pnf|9?~$H
data[k] = temp[i++]; udw>{3>
a = temp; : L}Fm2^
} else { `|nCr
data[k] = temp[j--]; f3_-{<FZ
b = temp[j]; [I6(;lq2
} ~)J]`el,Q
} R(YhVW_l
} |#_IAN
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/** hF m_`J&"
* @param data M"XILNV-~
* @param l ]M^k~Xa
* @param i G@$Y6To[
*/ bogw/)1
private void insertSort(int[] data, int start, int len) { ,Sz`$'^c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \tv^],^`
} x<&2`=
} Std?p{ i
} FXLY*eRk
} TpnJm%9`)t
6(#fGH&[
堆排序： RP!!6A6:
#fB&Hv #s7
package org.rut.util.algorithm.support; U(xN}Y?
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import org.rut.util.algorithm.SortUtil; 0}LBnV
~!V5Ug_2
/** =f48[=
* @author treeroot 9E`WZo^.
* @since 2006-2-2 6t zUp/O
* @version 1.0 8bf_W3
*/ qDSZ:36
public class HeapSort implements SortUtil.Sort{ _:N+mEF
ub/Z'!
/* (non-Javadoc) `.oWmBey\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L@mNfLK
*/ o )\\(^ld
public void sort(int[] data) { h=?V)WSM
MaxHeap h=new MaxHeap(); PhUG}94
h.init(data); uGXN ciEp`
for(int i=0;i h.remove(); ]o!rK<
System.arraycopy(h.queue,1,data,0,data.length); nK!yu?mS
} e6G=Bq$
c#)!-5E~H
private static class MaxHeap{ ,)&ansN
r6,EyCWcCs
void init(int[] data){ sxG8jD
this.queue=new int[data.length+1]; +,;"?j6<p
for(int i=0;i queue[++size]=data; )Cas0~RM
fixUp(size); c<k=8P
} \@\r`=WgB
} 2wCSjAWWh(
JD\yl[ac%
private int size=0; W;Pdbf"
3VI[*b
private int[] queue; S['rfD>9
B|\JGnNQ
public int get() { m8jQ~OS
return queue[1]; st_.~m!/
} ,0hk)Vvr3
_DDknQP
public void remove() { c[IT?6J4
SortUtil.swap(queue,1,size--); `s )- lI
fixDown(1); |2L|Zp&
} o"kVA;5<G
file://fixdown v|K,
private void fixDown(int k) { :D|5E>o(
int j; 54lU~ "
while ((j = k << 1) <= size) { kT@m*Etr{
if (j < size %26amp;%26amp; queue[j] j++; DPWt=IFU
if (queue[k]>queue[j]) file://不用交换 hSN{jl{L`
break; "_f~8f`y
SortUtil.swap(queue,j,k); 2uCw[iZM
k = j; mRurGaR
} xmM!SY>
} 'VMov
private void fixUp(int k) { dCb7sqJ%
while (k > 1) { ;c/|LXc\
int j = k >> 1; pftnFOLO
if (queue[j]>queue[k]) $q$G
break; ~cf*Oq
SortUtil.swap(queue,j,k); -n:~m p
k = j; AT:L&~O.
} i?3~Gog
} " jBc5*
z [|:HS&
} Tqf:G4!
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} ,J$XVvwxF
**G5fS.^W
SortUtil： k#g` n3L
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package org.rut.util.algorithm; a23XrX
bo-AM]
import org.rut.util.algorithm.support.BubbleSort; &E?TR A# E
import org.rut.util.algorithm.support.HeapSort; Vr^UEu.w?
import org.rut.util.algorithm.support.ImprovedMergeSort; Vsj1!}X:
import org.rut.util.algorithm.support.ImprovedQuickSort; W?:e4:Q
import org.rut.util.algorithm.support.InsertSort; /&i6vWMhP
import org.rut.util.algorithm.support.MergeSort; =#Z+WD-E
import org.rut.util.algorithm.support.QuickSort; o*t4zF&n
import org.rut.util.algorithm.support.SelectionSort; V+$^4Ht
import org.rut.util.algorithm.support.ShellSort; 0X<U.Sxn
d}w}VL8l
/** ymW? <\AD,
* @author treeroot u*S-Pji,x
* @since 2006-2-2 /'l"Us},^!
* @version 1.0 TOb(
*/ yg^ 4<A
public class SortUtil { ]3\%i2NM
public final static int INSERT = 1; `x:O&2
public final static int BUBBLE = 2; gTQc=,3l3
public final static int SELECTION = 3; FKH_o
public final static int SHELL = 4; KY'x;\0 g
public final static int QUICK = 5; &v/>P1Z G
public final static int IMPROVED_QUICK = 6; |muZv!,E
public final static int MERGE = 7; vf@toYc[E
public final static int IMPROVED_MERGE = 8; iAr]Ed"9|
public final static int HEAP = 9; yno X=#`
xxQgX~'x
public static void sort(int[] data) { V<i_YLYmJe
sort(data, IMPROVED_QUICK); <~Oy3#{
} AX]cM)w
private static String[] name={ OQJ#>*?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6QYHPz
}; ujf]@L?
#z5$_z?_
private static Sort[] impl=new Sort[]{ so>jz@!EE
new InsertSort(), ]@6L,+W"
new BubbleSort(), 8~}~d}wW
new SelectionSort(), RI3GAd
new ShellSort(), Gspb\HJ^
new QuickSort(), pt%*Y.)az
new ImprovedQuickSort(), !"LFeqI$lr
new MergeSort(), 0O!A8FA0
new ImprovedMergeSort(), =.]{OT
new HeapSort() |Kq<}R
}; aT~=<rEDy
iOB*K)U1
public static String toString(int algorithm){ dAr=X4LE
return name[algorithm-1]; H1d2WNr[
} *AG01# ZF
J(Fk@{!F.*
public static void sort(int[] data, int algorithm) { FvXpqlp
impl[algorithm-1].sort(data); n#S?fsQN
} :I2spBx
)E*-
public static interface Sort { mM2DZ^"j(
public void sort(int[] data); EEP&Y?
} Od+nBJ
jpkKdQX)
public static void swap(int[] data, int i, int j) { jSQM3+`b
int temp = data; GQ0(lS
data = data[j]; lxfv'A
data[j] = temp; ?BRZ){)
} 2t;3_C
} qV)hCc/ ~