[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; ru>c\X^|
} $XZC8L#
int i1=l; 5`3Wua
int i2=mid+1; K}feS(Ji
for(int cur=l;cur<=r;cur++){ UG,<\k&
if(i1==mid+1) />13?o#
data[cur]=temp[i2++]; Lk>GEi|
else if(i2>r) b"PRa|]
data[cur]=temp[i1++]; |z 8Wh
else if(temp[i1] data[cur]=temp[i1++]; QIWfGVc-
else )wb&kug-
data[cur]=temp[i2++]; 0;/},B[A
} nX>HRdC
} 1Y6DzWI
bMvHAtp
} +\yQZ{4'@
>S[NI<=8S
改进后的归并排序: '<!T'l:R:/
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package org.rut.util.algorithm.support; _Z0O]>KH
Ty5}5)CRZ
import org.rut.util.algorithm.SortUtil; (DTXc2)c
\-nbV#{
/** [IRWmN-
* @author treeroot sqE? U*8.-
* @since 2006-2-2 nN*:"F/^
* @version 1.0 ?rSm6V
*/ B4kJ 7Pdny
public class ImprovedMergeSort implements SortUtil.Sort { 277Am*2
e:T8={LU2W
private static final int THRESHOLD = 10; C9Xj)5k@R
M\L^ Wf9
/* '(-SuaH49
* (non-Javadoc) `F,*NESv
* 6_a~ 4_#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {[Z}<#n)
*/ +/|t8zFWs
public void sort(int[] data) { fKkH [
int[] temp=new int[data.length]; syB.Z-Cpd
mergeSort(data,temp,0,data.length-1); UWIw/(Mv/]
} yRtxh_wr9
90[?)s
private void mergeSort(int[] data, int[] temp, int l, int r) { 3{FUFx
int i, j, k; N799@:.
int mid = (l + r) / 2; KL^hYjC
if (l == r) ? 1 ~C`I;
return; e)):U
if ((mid - l) >= THRESHOLD) $`'Xb
mergeSort(data, temp, l, mid); 3 6-Sw
else xu(N'l.7&
insertSort(data, l, mid - l + 1); SXF~>|h5<
if ((r - mid) > THRESHOLD) M_Z(+k{Gy
mergeSort(data, temp, mid + 1, r); ]J)3y+;P
else k*"FMJG_
insertSort(data, mid + 1, r - mid); us$=)m~v+
s!eB8lkcT
for (i = l; i <= mid; i++) { JV_V2L1Ut
temp = data; (n {,R
} Y2 QX9RN
for (j = 1; j <= r - mid; j++) { Bq*aP*jv
temp[r - j + 1] = data[j + mid]; &vHfuM`
} x-Ug(/!^
int a = temp[l]; e%K oecq
int b = temp[r]; u~\I
for (i = l, j = r, k = l; k <= r; k++) { YIZ+BVa
if (a < b) { \95O
data[k] = temp[i++]; J%SuiT$L&Y
a = temp; MQ7Hn;`B
} else { /+zzZnLl-M
data[k] = temp[j--]; Bkh1VAT
b = temp[j]; d^W1;0
} ml\2%07
} 6E0{(*
} VY]L<4BfGL
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/** H){lXR/#u
* @param data ,p7W4;?4
* @param l ;fl3'.S[
* @param i N"Mw1R4
*/ MF]EX
private void insertSort(int[] data, int start, int len) { #[ZNiaWT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6 ~LCj"
} f\]splL
} .M zAkZ=
} lOJ3_8
} hUO&rov3@
/hksESiU
堆排序： ObIL w
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package org.rut.util.algorithm.support; 7v{s?h->$
3sF^6<E
import org.rut.util.algorithm.SortUtil; [8$K i$;
[t}\8^y
/** 6l,oL'$}P1
* @author treeroot 9#iv|X
* @since 2006-2-2 2?./S)x)
* @version 1.0 8{ooLdpX7
*/ {Xw6p
public class HeapSort implements SortUtil.Sort{ 6Qh@lro;y
`+?g96
/* (non-Javadoc) Htn''adg5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &w7Ev21
*/ 6X`i*T$.
public void sort(int[] data) { ).D+/D/"2
MaxHeap h=new MaxHeap(); Rt=zqfJ
h.init(data); *uG!U%jY)
for(int i=0;i h.remove(); 6xq/
System.arraycopy(h.queue,1,data,0,data.length); Fh0cOp(
} JT(6Uf
NuQ l
private static class MaxHeap{ <A+n[h
Tc.k0n%W:b
void init(int[] data){ 6! .nj3$*
this.queue=new int[data.length+1]; q47:kB{d
for(int i=0;i queue[++size]=data; f:hsE
fixUp(size); {Z!x]}{M
} mA2L~=v#
} ExKjH*gn
O~~WP*N
private int size=0; X" m0||
jqv"8S5
private int[] queue; +0Z,#b
LfsqtQ=J`
public int get() { 4Fs5@@>X
return queue[1]; 7G]v(ay
} 56`Tna,t
)F,IPAA#
public void remove() { $LkTu
SortUtil.swap(queue,1,size--); cM 5V%w
fixDown(1); 1XXuFa&
} s:ZYiZ-
file://fixdown DElrY)3O.
private void fixDown(int k) { oqUF_kh
int j; K6d2}!5
while ((j = k << 1) <= size) { 0*^>/*
if (j < size %26amp;%26amp; queue[j] j++; #X t|"Z
if (queue[k]>queue[j]) file://不用交换 JG/Pc1aK
break; ` G-V %
SortUtil.swap(queue,j,k); <N'v-9=2jl
k = j; !%X#;{
} tN1xZW:
} `p'682xI
private void fixUp(int k) { |w].*c}Z
while (k > 1) { r?2EJE2{V
int j = k >> 1; h"3Mj*s
if (queue[j]>queue[k]) u8Ak2:
break; QCAoL.v
SortUtil.swap(queue,j,k); r\T'_wo
k = j; Q5xQ5Le
} d+o.J",E
} {|{;:_.>
;_p$5GVR|
} J~.`
xQ,My
} F87/p
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SortUtil： CC B'
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package org.rut.util.algorithm; zvbO q
pv]2"|]V)
import org.rut.util.algorithm.support.BubbleSort; JnIE6@g<y
import org.rut.util.algorithm.support.HeapSort; IhjZ{oV/@
import org.rut.util.algorithm.support.ImprovedMergeSort; 4G2iT+X-
import org.rut.util.algorithm.support.ImprovedQuickSort; iY*fp=c9
import org.rut.util.algorithm.support.InsertSort; Mz6PH)e;
import org.rut.util.algorithm.support.MergeSort; p?2^JJpUb
import org.rut.util.algorithm.support.QuickSort; =&I9d;7
import org.rut.util.algorithm.support.SelectionSort; gY&WH9sp?9
import org.rut.util.algorithm.support.ShellSort; < Dt/JA(p
b4&l=^:e=
/** Vbv)C3ezD
* @author treeroot H~ E<ek'~
* @since 2006-2-2 H1.ktG
* @version 1.0 X;]Ijha<*
*/ $p|Im,
public class SortUtil { C#LTF-$])
public final static int INSERT = 1; N*+L'bO
public final static int BUBBLE = 2; #y-R*4G
public final static int SELECTION = 3; kvG.?^ v
public final static int SHELL = 4; GTM@9^
public final static int QUICK = 5; E#R1
public final static int IMPROVED_QUICK = 6; `ZU]eAV
public final static int MERGE = 7; B$M4f7
public final static int IMPROVED_MERGE = 8; d$^@$E2f
public final static int HEAP = 9; K0~=9/
21O@yNpS$
public static void sort(int[] data) { $R%tD.d3
sort(data, IMPROVED_QUICK); OS-k_l L
} ,FwpHs $A
private static String[] name={ =QK ucLo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EW`3$J;
}; /dO*t4$@?
g:Q:cSg<
private static Sort[] impl=new Sort[]{ B@v (ZY
new InsertSort(), aLl=L_
new BubbleSort(), k t'[
new SelectionSort(), }@"v7X $
new ShellSort(), 7 0PGbAD
new QuickSort(), Z;S)GUG^
new ImprovedQuickSort(), =YIosmr
new MergeSort(), |ZC'a!
new ImprovedMergeSort(), znDpg{U(
new HeapSort() -24ccN;
}; Yxy!&hPLv:
1]9l SE!E7
public static String toString(int algorithm){ 0"Euf41
return name[algorithm-1]; [nG[ x|;|
} 4V;-*:
fda4M
public static void sort(int[] data, int algorithm) { [kTckZv
impl[algorithm-1].sort(data); b6xz\zCL
} 2I|lY>Z
U_hzSf
public static interface Sort { >6Jz=N,
public void sort(int[] data); XD" 4t4~>
} -p%cw0*Y]C
&O#1*y Z
public static void swap(int[] data, int i, int j) { :wEy""*N0
int temp = data; YI;MS:Qj
data = data[j]; sy-#Eo#3
data[j] = temp; GvvKM=1
} _T7XCXEk
} Q5l+-