[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; !+T1kMP+l
} ?['!0PF
int i1=l; }vd*eexA
int i2=mid+1; SiratkP9n7
for(int cur=l;cur<=r;cur++){ SAx9cjj+
if(i1==mid+1) ]k0 jmE
data[cur]=temp[i2++]; NK_|h%
else if(i2>r) {m.$EoS
data[cur]=temp[i1++]; <>cS@V5j
else if(temp[i1] data[cur]=temp[i1++]; }rTH<!j
else du3f'=q6|
data[cur]=temp[i2++]; _IYaMo.n
} %BqaVOKJ"f
} k9^Hmhjw
0s#72}n
} ,5}U H
m~ tvuz I
改进后的归并排序: "s*-dZO
J!6FlcsZm
package org.rut.util.algorithm.support; RLB3 -=9t
*T|B'80
import org.rut.util.algorithm.SortUtil; gE-y`2SU
l4Xz r:]
/** rl*O-S/
* @author treeroot Ifj&S'():
* @since 2006-2-2 CLb6XnkcA\
* @version 1.0 ~GaGDS\V
*/ AZtS4]4G)
public class ImprovedMergeSort implements SortUtil.Sort { a|aVc'j
bLgH3[{
private static final int THRESHOLD = 10; /:&!o2&1H
l>?c AB[
/* p*Bty@CRi
* (non-Javadoc) hRcb}>pr
* c?p^!zG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g,ZA\R~
*/ yBIlwN`kB
public void sort(int[] data) { Y?T{>"_W
int[] temp=new int[data.length]; `BPTcL<W
mergeSort(data,temp,0,data.length-1); %`vzQt`>
} w2)Ro:G
^NW[)Dq1<
private void mergeSort(int[] data, int[] temp, int l, int r) { (B7G'h.?
int i, j, k; 7io["zW
int mid = (l + r) / 2; H"Pb)t
if (l == r) OG,P"sv
return; sGvbL-S-f:
if ((mid - l) >= THRESHOLD) \U~4b_aN
mergeSort(data, temp, l, mid); S:\i M:
else )xGAe#E~j
insertSort(data, l, mid - l + 1); ]$ew 5%
if ((r - mid) > THRESHOLD) [uq>b|`RG
mergeSort(data, temp, mid + 1, r); pMc6p0
else fCl}eXg6w
insertSort(data, mid + 1, r - mid); ]Z JoC!u
DHidI\*gT
for (i = l; i <= mid; i++) { Q M,!-~t
temp = data; &K)8
} weitDr6
for (j = 1; j <= r - mid; j++) { I$Nh|eM
temp[r - j + 1] = data[j + mid]; o_b[*
} cPGlT"
int a = temp[l]; |m19fg3u
int b = temp[r]; PJnC
for (i = l, j = r, k = l; k <= r; k++) { B[vj X"yg
if (a < b) { Tt[zSlIMx
data[k] = temp[i++]; BG{f)2F\
a = temp; 'm%{Rz>j
} else { R;& >PFmq
data[k] = temp[j--]; 8#I>`z^F
b = temp[j]; T:|/ux3
} A]1Nm3@
} prBLNZp
} J3Mb]X)_}
e5=d Ev
/** d1/emwH
* @param data D)_ C@*q
* @param l Rd?}<L
* @param i k_=SDm a
*/ NzRvbj]
private void insertSort(int[] data, int start, int len) { jXcJ/g(X3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )n/%P4l
} QaX.Av
} lG*Rw-?a
} 5:Qz
} od;-D~
bP,<^zA|X
堆排序： qZoDeN-CC
-@uFRQt
package org.rut.util.algorithm.support; b^Hrzn
idmU.`
import org.rut.util.algorithm.SortUtil; QbU5FPiN
fS]&?$q
/** :dmE/Tq
* @author treeroot FR(W.5[
* @since 2006-2-2 =O/Bte.
* @version 1.0 vNv?trw
*/ ]!UYl
public class HeapSort implements SortUtil.Sort{ ~iw&^p|=K
rvA>khu0/
/* (non-Javadoc) HN47/]"*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;#B(L=/
*/ I8*VM3
public void sort(int[] data) { ;'!x
MaxHeap h=new MaxHeap(); Z1Qz LvWs
h.init(data); w$gvgz
for(int i=0;i h.remove(); [^>XRBSm
System.arraycopy(h.queue,1,data,0,data.length); a"~o'W7
} _8K+iqMZG
z,HhSW?&^
private static class MaxHeap{ }v(wjD
6*8Wtq
void init(int[] data){ vr!J3H f
this.queue=new int[data.length+1]; ! VwU=5
for(int i=0;i queue[++size]=data; \j)Evjw
fixUp(size); -K"'F`;W
} }v1wpv/b(
} >DL
pjl%Jm
private int size=0; 4Z)4WGp!
N'^>pSc4W|
private int[] queue; :}Jx
VJ*1g+c
public int get() { |5@Ra@0
return queue[1]; lED!}h'4
} ,|%KlHo^
:\](m64z;
public void remove() { LS@TTiN
SortUtil.swap(queue,1,size--); s"(RdJ-,
fixDown(1); *k$[/{S1-
} ~cz}C("Z
file://fixdown !}*N';
private void fixDown(int k) { ,(jJOFf
int j; {1GJ,['qL
while ((j = k << 1) <= size) { ;qx#]Z0 <
if (j < size %26amp;%26amp; queue[j] j++; 8&QST!JGSX
if (queue[k]>queue[j]) file://不用交换 C|{Sj`,XG
break; <,.$U\W
SortUtil.swap(queue,j,k); D(cD8fn,J
k = j; p l)":}/)
} 1-RY5R}VR
} mq:k|w^6
private void fixUp(int k) { Xz]l#w4Pp
while (k > 1) { u09Tlqh0 3
int j = k >> 1; $m`Dyu
if (queue[j]>queue[k]) MVatV[G
break; &lc@]y8
SortUtil.swap(queue,j,k); YMGy-]!o
k = j; X<ex >sM
} ;W|kc</R*
} UhB+c
?7\V)$00(&
} UG1<Xfu|
\0@DOW22C
} =g% L$b<i
b3NIFKw
SortUtil： x/QqG1q
s|YH_1r
package org.rut.util.algorithm; h yrPu_
0 _!0\d#c
import org.rut.util.algorithm.support.BubbleSort; 7KtU\u
import org.rut.util.algorithm.support.HeapSort; gt4GN`-k
import org.rut.util.algorithm.support.ImprovedMergeSort; ]aN9mT N
import org.rut.util.algorithm.support.ImprovedQuickSort; ,@"yr>Q9#6
import org.rut.util.algorithm.support.InsertSort; *i#2>=)
import org.rut.util.algorithm.support.MergeSort; Zy0M\-Mn
import org.rut.util.algorithm.support.QuickSort; ZbRRDXk!
import org.rut.util.algorithm.support.SelectionSort; )1<0c@g=
import org.rut.util.algorithm.support.ShellSort; PW*Vfjf4
x;ik
/** {uDW<u_!
* @author treeroot 8lQ/cGAc
* @since 2006-2-2 hzD)yf
* @version 1.0 a%go[_w
*/ B'/U#>/
public class SortUtil { ]#~J[uk
public final static int INSERT = 1; ;W0J
public final static int BUBBLE = 2; 0'&C5v'
public final static int SELECTION = 3; g%2G=gR$?z
public final static int SHELL = 4; 'afW'w@
public final static int QUICK = 5; m:_#kfC&K"
public final static int IMPROVED_QUICK = 6; deVd87;@7[
public final static int MERGE = 7; }OkzP)(
public final static int IMPROVED_MERGE = 8; .0Ud?v>=
public final static int HEAP = 9; Ff<cY%t
g4W$MI
public static void sort(int[] data) { vc#o(?g
sort(data, IMPROVED_QUICK); mR}8}K]L
} )L<.;`g4x
private static String[] name={ @6UY4vq9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4S(G366
}; 6v@Prw@.b
R P{pEd
private static Sort[] impl=new Sort[]{ )Rr6@o
new InsertSort(), [bLKjD
new BubbleSort(), 1$Up7=Dr=
new SelectionSort(), A-x^JC=
new ShellSort(), 81RuNs]
new QuickSort(), aru2H6
new ImprovedQuickSort(), }$?FR
new MergeSort(), Uo3
new ImprovedMergeSort(), >iyNZ]."\
new HeapSort() ``xm##K
}; ^C gg1e1
ZllmaI
public static String toString(int algorithm){ o HK
return name[algorithm-1]; HB9"T5Pd*
} &0 QUObK
gD$&OkH
public static void sort(int[] data, int algorithm) { R6~6b&-8
impl[algorithm-1].sort(data); tbQY&TO1
} 5{ap
SiNgV\('U
public static interface Sort { &zn|),
public void sort(int[] data); -=-^rQx9
} sBlq)h;G?6
lh-.I]>&`
public static void swap(int[] data, int i, int j) { Vy&X1lG:
int temp = data; q\tr&@4iC
data = data[j]; /OKp(u;)z
data[j] = temp; VnuG^)S
} %+r(*Q+0$f
} ^;II@n i