[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; >PalH24]
} JMyTwj[7
int i1=l; 8{I"q[GZ
int i2=mid+1; f7<pEGb
for(int cur=l;cur<=r;cur++){ ?nFO:N<
if(i1==mid+1) "mIgs9l$
data[cur]=temp[i2++]; BBL485`
else if(i2>r) t[C1z
data[cur]=temp[i1++]; d'HOpJE
else if(temp[i1] data[cur]=temp[i1++]; |. C1|J'Z
else %|"Qi]c d
data[cur]=temp[i2++]; "Pc$\zJm;
} [ygF0-3ND
} LAs7>hM
E5G{B'%j
} VWf %v
/iM$Tb5
改进后的归并排序: 79Bg]~}Z
?y7w}W
package org.rut.util.algorithm.support; Of7+/UV
e<\<,)9@/
import org.rut.util.algorithm.SortUtil; RA1yr+)
tIZ~^*'
/** :@. ;
* @author treeroot WS0JS'
* @since 2006-2-2 TT}]wZ
* @version 1.0 p2pAvlNoF
*/ JWHSnu!
public class ImprovedMergeSort implements SortUtil.Sort { \2!!L=&4G
;#anZC;
private static final int THRESHOLD = 10; 8L{u}|{
h/ep`-YaH
/* Je7RrCz
* (non-Javadoc) 3fkk [U
* FLr;`3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _N#&psQzw
*/ Dgi~rr1`'s
public void sort(int[] data) { #}yTDBt
int[] temp=new int[data.length]; 8 %Sb+w07
mergeSort(data,temp,0,data.length-1); Y& {|Sw7?
} #Ob]]!y
tJD] (F
private void mergeSort(int[] data, int[] temp, int l, int r) { *i%quMv
int i, j, k; Jh@_9/?
int mid = (l + r) / 2; g1[&c+=U`P
if (l == r) 9K"JYJ q2
return; >J>V% 7
if ((mid - l) >= THRESHOLD) l[Z)@bC1
mergeSort(data, temp, l, mid); Zk`#VH
else v[,Src
insertSort(data, l, mid - l + 1); X[hM8G
if ((r - mid) > THRESHOLD) w G!u+
mergeSort(data, temp, mid + 1, r); b-<HXn_Fd
else W{Q)-y
insertSort(data, mid + 1, r - mid); pj{\T?(
~L?nq@DL
for (i = l; i <= mid; i++) { n^9 ?~
temp = data; )|]dmQ-
} &7[[h+Lb
for (j = 1; j <= r - mid; j++) { =nRuY'
temp[r - j + 1] = data[j + mid]; }C#3O{5
} oyeG$mpg
int a = temp[l]; YD_]!HK}
int b = temp[r]; AFm1t2,+;
for (i = l, j = r, k = l; k <= r; k++) { Y 62r
if (a < b) { uHM@h{r
data[k] = temp[i++]; >L>+2z
a = temp; Y7Gs7
} else { NGTe4Crx
data[k] = temp[j--]; XD%wj
b = temp[j]; 46XN3r
} 284zmZZ
} 96ZdM=
} ltA/
e3(<8]`b[
/** !]b@RUU
* @param data FC>d_=V
* @param l %$mjJw<|&
* @param i kBsXfVs9
*/ nX5C<Ky
private void insertSort(int[] data, int start, int len) { v5$s#f<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x>3@R0A1:
} Yp5L+~J[
} =3'(A14C=
} kX;$}7n
} ])T/sO#'
C1B'#F9EO
堆排序： T9jw X:n
TQ'E5^
package org.rut.util.algorithm.support; S@}4-\
*4yN3y
import org.rut.util.algorithm.SortUtil; `gguip-C
C{m&}g`
/** A,XfD}+:Z
* @author treeroot Ja [4A0.
* @since 2006-2-2 ]PX}b
* @version 1.0 Z)9R9s
*/ %e=!nRc
public class HeapSort implements SortUtil.Sort{ T\sNtdF`:
(B#(Z=
/* (non-Javadoc) dOXD{c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x ^vt; $
*/ <r\I"z$
public void sort(int[] data) { p:[LnL
MaxHeap h=new MaxHeap(); bZ5n,KQA5
h.init(data); MCy~@)-IN
for(int i=0;i h.remove(); 4rp6 C/i
System.arraycopy(h.queue,1,data,0,data.length); ]VjLKFb~U
} _z"o1`{w
<GZhH:
private static class MaxHeap{ L;)v&a7[P
WL-0(
void init(int[] data){ GU6qIz|
this.queue=new int[data.length+1]; ;Bs^iL
for(int i=0;i queue[++size]=data; "tR}j,=S:D
fixUp(size); 9k>uRV6
} )I9aC~eAD
} ukihx?5
r+\/G{+=}
private int size=0; <GfVMD
a%J/0'(d
private int[] queue; LDQ e^
kL;t8{n
public int get() { 14l; *
return queue[1]; KH}t:m+h
} hyu}}0:
gCV rC
public void remove() { aN'0}<s
SortUtil.swap(queue,1,size--); fPz=KoN
fixDown(1); gWu"91Y0>
} 4#2 ,Y!
file://fixdown fM:80bnL+
private void fixDown(int k) { {B^pnLc
int j; 3o0IjZ=[>
while ((j = k << 1) <= size) { >hb-5xC
if (j < size %26amp;%26amp; queue[j] j++; RV92qn B
if (queue[k]>queue[j]) file://不用交换 X_?%A54z?
break; /(zB0TEd
SortUtil.swap(queue,j,k); ~@fanR =
k = j; rWe 8D/oc
} l $Zs~@N
} jt%WPkY:
private void fixUp(int k) { "1%*'B^}bw
while (k > 1) { cYD1~JX.
int j = k >> 1; `~E<Sf<M
if (queue[j]>queue[k]) Ar5JP_M`E
break; 8b~7~VCk
SortUtil.swap(queue,j,k); *1v_6<;2i<
k = j; uXNp!tY
} 4K #^dJnC
} .~,^u
V=9Bto00
} +/_!P;I
4Q&mC"
} opnkmM&[
MM*-i=
SortUtil： ,O9`X6rh'
u]#8$M2
package org.rut.util.algorithm; O3}P07
Y-7.Vjt^
import org.rut.util.algorithm.support.BubbleSort; Tvrc%L(]
import org.rut.util.algorithm.support.HeapSort; P.1Qc)m4
import org.rut.util.algorithm.support.ImprovedMergeSort; d!!3"{'
import org.rut.util.algorithm.support.ImprovedQuickSort; +1f{_v
import org.rut.util.algorithm.support.InsertSort; f>4+,@G
import org.rut.util.algorithm.support.MergeSort; ds')PIj
import org.rut.util.algorithm.support.QuickSort; d-i&k(M
import org.rut.util.algorithm.support.SelectionSort; |{!Ns+'
import org.rut.util.algorithm.support.ShellSort; C=EhY+5
8fEAYRGd
/** NIL^UN}
* @author treeroot x"!#_0TT}
* @since 2006-2-2 %9.bu|`KK
* @version 1.0 h%|9]5(=
*/ 4Xr"d@2(
public class SortUtil { l58l
public final static int INSERT = 1; [$H( CH`
public final static int BUBBLE = 2; M'vXyb%$1
public final static int SELECTION = 3; LA>dkPB
public final static int SHELL = 4; A1 b6Zt
public final static int QUICK = 5; X)Ocn`|
public final static int IMPROVED_QUICK = 6; ~Gwas0eNa
public final static int MERGE = 7; rcW#6VZ=
public final static int IMPROVED_MERGE = 8; .Btv}b
public final static int HEAP = 9; BiI{8`M!$x
B~e7w 4
public static void sort(int[] data) { U(8I+xZ
sort(data, IMPROVED_QUICK); 25w6KBTe;:
} Ic_tc
private static String[] name={ eKS:7:X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f`bIQ9R
}; uk1v7#p
" gwm23Rpj
private static Sort[] impl=new Sort[]{ 0sY#MHPT&
new InsertSort(), P[6dTZ!\s
new BubbleSort(), #C'o'%!(
new SelectionSort(), Q0_M-^~WT
new ShellSort(), !zF4 G,W
new QuickSort(), UU-v;_oP
new ImprovedQuickSort(), }$w4SpR
new MergeSort(), ( / G)"]
new ImprovedMergeSort(), fCs\Q
new HeapSort() Q=MCMe
}; sCL/pb]
Sk!v,gx
public static String toString(int algorithm){ (#CBq
return name[algorithm-1]; +}`p"<'u
} GF9ZL
M55e=
public static void sort(int[] data, int algorithm) { v] W1F,u
impl[algorithm-1].sort(data); ?%_]rr9
} [%7IQ4`{
60(}_%
public static interface Sort { F9ZOSL 8Q
public void sort(int[] data); P]{B^,E
} z[_R"+
s=3EBh
public static void swap(int[] data, int i, int j) { 'JJ1#kKa
int temp = data; %kaTQ"PB
data = data[j]; aEV|>K=6Y'
data[j] = temp; n">?LN-DC
} bEEJVF0
} g%Th_=qy