[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; )eT>[['fm
} :j .:t
int i1=l; q2J|koT
int i2=mid+1; C>x)jDb?
for(int cur=l;cur<=r;cur++){ ||*F.p
if(i1==mid+1) J5F@<vi
data[cur]=temp[i2++]; E9>z.vV
else if(i2>r) Lfcy#3!
data[cur]=temp[i1++]; B|"/bQ
else if(temp[i1] data[cur]=temp[i1++]; Ipq0 1 +
else *P9"1K+
data[cur]=temp[i2++]; kvbW^pl
} )=()
} ]UEA"^
%qo.n v
} J^CAQfcx
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改进后的归并排序: &y1iLk h^
Kr'?h'F
package org.rut.util.algorithm.support; L~)8Q(f
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import org.rut.util.algorithm.SortUtil; Rc{R^5B
Yb`b/BMR
/** u&c%L0)E&
* @author treeroot ?Y -;781
* @since 2006-2-2 ,g}$u'A+d
* @version 1.0 [jlum>K
*/ e(a,nZF.
public class ImprovedMergeSort implements SortUtil.Sort { Hcg7u7M{
<z2.A/L
private static final int THRESHOLD = 10; E9I08AODS
zI,Qc60B
/* n{MTh_C4n
* (non-Javadoc) '" %0UflJS
* D8u`6/^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HBvyX`-
*/ d9U)O6=
public void sort(int[] data) { ezL1,GT
int[] temp=new int[data.length]; Mb[4_Dc
mergeSort(data,temp,0,data.length-1); @$^4Av-
} Z]G#:
KWjhkRK4]
private void mergeSort(int[] data, int[] temp, int l, int r) { `Rfe*oAf
int i, j, k; 5NN;Fw+
int mid = (l + r) / 2; (!5Pl`:j"
if (l == r) \/j,
return; s+fxv(,"c
if ((mid - l) >= THRESHOLD) <yEApWd;
mergeSort(data, temp, l, mid); Or?c21un
else )V>OND
insertSort(data, l, mid - l + 1); |hi,]D^Kc
if ((r - mid) > THRESHOLD) fVY I
mergeSort(data, temp, mid + 1, r); G8__6v~
else SE'|||B
insertSort(data, mid + 1, r - mid); o[ks-C>jw
#o}/'
for (i = l; i <= mid; i++) { WvJ:yUb2
temp = data; b:~#;$g
} .'H$|"(v
for (j = 1; j <= r - mid; j++) { T}msF
temp[r - j + 1] = data[j + mid]; N2}Y8aR~
} ;qUB[Kw
int a = temp[l]; ;T0X7MNx
int b = temp[r]; ^&mrY[;S
for (i = l, j = r, k = l; k <= r; k++) { |y0k}ed
if (a < b) { B=n90XO |
data[k] = temp[i++]; z\UXnRL
a = temp; p6BDhT(RS
} else { |:#Ug
data[k] = temp[j--]; GXD<X_[
b = temp[j]; sUc[!S:/
} \}.bTca
} W$,/hB& z
} %>9L}OAm
\ILNx^$EL
/** GT]>
* @param data oxeu%wj_
* @param l AhA&=l i;
* @param i +HUy,@^Pa
*/ 6la'\l#
private void insertSort(int[] data, int start, int len) { V3cKdlu Na
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DBaZcO(U
} y>E:]#F
} @73kry v
} `kvIw,c.
} {Y2J:x
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堆排序： mejNa(D ^
']\SX*z?
package org.rut.util.algorithm.support; WFk%nO/
2!W[ff@~7
import org.rut.util.algorithm.SortUtil; &{<hY|%
b3[!1i
/** : KFK2yD
* @author treeroot L?|}!
* @since 2006-2-2 U<sGj~"#
* @version 1.0 1fIx@
*/ O9?.J,,mVh
public class HeapSort implements SortUtil.Sort{ )hQ]>o@i{
#*y.C[^5{
/* (non-Javadoc) 7 qn=W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z]DZ:dF
*/ S~fP$L5
public void sort(int[] data) { [tt{wl"E
MaxHeap h=new MaxHeap(); ZD|F"v.
h.init(data); H$WD7/?j
for(int i=0;i h.remove(); 0n2H7}Uq
System.arraycopy(h.queue,1,data,0,data.length); Gukvd6-g9b
} Srmr`[i
',]Aj!q
private static class MaxHeap{ L'KKU4zj
*! :j$n;
void init(int[] data){ jwLZC
this.queue=new int[data.length+1]; d(RMD
for(int i=0;i queue[++size]=data; f2o6GC_
fixUp(size); Y7qQ`|
} lo6upirZX
} K2n#;fY %
DQ/rx`BG
private int size=0; u$5.GmKm
8Ara^Xh}q
private int[] queue; pYAKA1F
}m^^6h
public int get() { $?z}yx$
return queue[1]; +'93%/:
} YG=:lf
ZWS:-]P.
public void remove() { - uO(qUa#
SortUtil.swap(queue,1,size--); 4B[pQlg
fixDown(1); ( [a$Z2m
} Aep](je
file://fixdown AsuugcN*
private void fixDown(int k) { z(.,BB[
int j; ^["D>@yIR
while ((j = k << 1) <= size) { s.;'-oA
if (j < size %26amp;%26amp; queue[j] j++; kxEq_FX
if (queue[k]>queue[j]) file://不用交换 wX6-WQR
break; [Rq|;p
SortUtil.swap(queue,j,k); II _CT=
k = j; XA>uCJf
} rB]2qk`/'
} ~rjK*_3/
private void fixUp(int k) { Yuf+d-%
while (k > 1) { E'mT%@MOM
int j = k >> 1; }Ptv[{q]GE
if (queue[j]>queue[k]) tzgaHN
break; %rlqq*
SortUtil.swap(queue,j,k); SQU@JKi;g
k = j; ARnq~E@1
} ^jS1g*nrN
} u^^jt(j
`.pd %\
} A-L)2.M
| ~>7_:
} lsj9^z7
!@P{s'<:
SortUtil： FxK!h.C.
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package org.rut.util.algorithm; bW/T}FND
go6;_
import org.rut.util.algorithm.support.BubbleSort; <Tbl|9
import org.rut.util.algorithm.support.HeapSort; !h}Vz
import org.rut.util.algorithm.support.ImprovedMergeSort; ~Hg*vCd ?
import org.rut.util.algorithm.support.ImprovedQuickSort; ir\)Hz2P
import org.rut.util.algorithm.support.InsertSort; T:K}mLSg
import org.rut.util.algorithm.support.MergeSort; Si23w'T
import org.rut.util.algorithm.support.QuickSort; wfu`(4
import org.rut.util.algorithm.support.SelectionSort; XrMw$_0)
import org.rut.util.algorithm.support.ShellSort; LB$0'dZU
*'M+oi
/** w&es N$2
* @author treeroot E;4dlL`*
* @since 2006-2-2 &jg>X+;
* @version 1.0 6[a;83
*/ }FkF1?C
public class SortUtil { W;P8'_2Y
public final static int INSERT = 1; TJ0;xn6o
public final static int BUBBLE = 2; ~<3J9\z1
public final static int SELECTION = 3; KzZRFEA_
public final static int SHELL = 4; wQOIUvd
public final static int QUICK = 5; /+?eSgM/
public final static int IMPROVED_QUICK = 6; `M,Gsy1h
public final static int MERGE = 7; (ZD~Q_O-
public final static int IMPROVED_MERGE = 8; SA,+oq(
public final static int HEAP = 9; kSjvY&n%
F@-8J?Hl:
public static void sort(int[] data) { *#o2b-[V
sort(data, IMPROVED_QUICK); ?; tz
} r]bG,?|
private static String[] name={ sbq:8P#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Tl-Ix&37
}; AXPdgo6
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private static Sort[] impl=new Sort[]{ nm@.] "/
new InsertSort(), D'"l%p
new BubbleSort(), #7naI*O
new SelectionSort(), TA!6|)BUW
new ShellSort(), #UqE%g`J
new QuickSort(), &MJ`rj[%
new ImprovedQuickSort(), BVxk}#d
new MergeSort(), D4U<Rn6N_5
new ImprovedMergeSort(), f(*iagEy
new HeapSort() /k=krAz.
}; X->` ~-aj
+qM2&M
public static String toString(int algorithm){ z_nY>_L83*
return name[algorithm-1]; \|C~VU@
} Qa,$_,E
l#3jJn
public static void sort(int[] data, int algorithm) { O+ J0X*&x
impl[algorithm-1].sort(data); *30T$_PiX|
} $&. rS.*
#8a k=lL
public static interface Sort { JYa3xeC;
public void sort(int[] data); uB+:sX-L
} z v:o$2Z
L?b;TjLe
public static void swap(int[] data, int i, int j) { z/f0.RJ
int temp = data; [yDOvQ[
data = data[j]; T)Pr%kF
data[j] = temp; opon"{
} @e^(V$ap
} 7$Pf