[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; "m\UqQGX
} lMI ix0sSj
int i1=l; cC(ubUR
int i2=mid+1; B "s8i{Vm
for(int cur=l;cur<=r;cur++){ @[Jt~v
if(i1==mid+1) Xk7$?8r4&
data[cur]=temp[i2++]; 1&>nL`E[3
else if(i2>r) faKrSmE!
data[cur]=temp[i1++]; _mq*j^u,j
else if(temp[i1] data[cur]=temp[i1++]; jwtXI\@MS
else WhVmycdv
data[cur]=temp[i2++]; a)yNXn8E_
} OD2ai]!v+
} 1\7"I-
`8b6 /
} &oEq&
i:Ct6[
改进后的归并排序: ?lw[
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package org.rut.util.algorithm.support; 5FR#_}k]_F
{&j{V-}f
import org.rut.util.algorithm.SortUtil; igbb=@QBJ
p<nBS"/
/** .j4ziRa-
* @author treeroot ]j#$.$q
* @since 2006-2-2 Z 5YW L4s
* @version 1.0 8`*9jr
*/ %D6Wlf+^n
public class ImprovedMergeSort implements SortUtil.Sort { 9P>S[=
OL9C#er
private static final int THRESHOLD = 10; =$z$VbBv
s&_O2(l
/* wyhf:!-I
* (non-Javadoc) S2GBX1
* ?g*T3S"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u9^;~i,
*/ 4uVmhjT:X
public void sort(int[] data) { jW0z|jr
int[] temp=new int[data.length]; =}o>_+"
mergeSort(data,temp,0,data.length-1); XGl13@=O
} 8'\,&f`Y
J?ZVzKTb>}
private void mergeSort(int[] data, int[] temp, int l, int r) { Pds*M?&F
int i, j, k; 4qXUk:C@m
int mid = (l + r) / 2; 8ch~UBq/
if (l == r) 9: |K]y
return; $YQ&\[pDA
if ((mid - l) >= THRESHOLD) O]LuL&=s y
mergeSort(data, temp, l, mid); S<9d^= a
else l@F e(^5E
insertSort(data, l, mid - l + 1); 78BuD[<X-
if ((r - mid) > THRESHOLD) 2o5<nGn
mergeSort(data, temp, mid + 1, r); ?4?jG3p
else Mz.&d:
insertSort(data, mid + 1, r - mid); bQQ/7KM
>!p K94
for (i = l; i <= mid; i++) { &!~n=]*sz
temp = data; `.-k%2?/
} [hj'Yg8{
for (j = 1; j <= r - mid; j++) { Bw7:ry
temp[r - j + 1] = data[j + mid]; @Lv_\^2/}
} @I.OT
int a = temp[l]; aJ_Eh(cF
int b = temp[r]; M<m64{m1
for (i = l, j = r, k = l; k <= r; k++) { F+9`G[
if (a < b) { [bVP2j
data[k] = temp[i++]; M!DoR6
a = temp; nhhJUN?8
} else { ?vNS!rY2&
data[k] = temp[j--]; 0A4|
b = temp[j]; ~{!!=@6
} M#2U'jy
} uM<+2S
} jCv+m7Z
&WU*cfJn)A
/** _1%^ibn
* @param data R~(.uV`#j
* @param l IHmNi>E&/
* @param i "?.Wb L
*/ g%P4$|C9i
private void insertSort(int[] data, int start, int len) { @Odu.F1e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W>IKy#
} Ri0+nJ6
} *4VP5]!
} rz7b%WY
} 1T?%i
Wfw9cxGkf
堆排序： "G)? E|
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package org.rut.util.algorithm.support; Bq8<FZr#!
% 7:
import org.rut.util.algorithm.SortUtil; | lfPd
uCr
/** ZSb+92g{L$
* @author treeroot !_#js
* @since 2006-2-2 ;9sVWJJCw
* @version 1.0 )pH{b]t
*/ >n\Q[W
public class HeapSort implements SortUtil.Sort{ TI&J>/z;$
u)MA#p {
/* (non-Javadoc) .lS6KBf@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0zNS;wvv&
*/ 4Lb<#e13R?
public void sort(int[] data) { >R-$JrU.=
MaxHeap h=new MaxHeap(); t!N>0]:mo
h.init(data); \hc9Rk
for(int i=0;i h.remove(); Wm_-T]#_
System.arraycopy(h.queue,1,data,0,data.length); ^O"`.2O1
} 2yc\A3ft#
4D$E
private static class MaxHeap{ Q+N @j]'
<(%uOo$
void init(int[] data){ :9qB{rLi}
this.queue=new int[data.length+1]; v1rGq
for(int i=0;i queue[++size]=data; k/Q]Ke
fixUp(size); >s~`K^zS
} h {btT
} PrxXL/6
0CYI,V
private int size=0; $OuA<-
$a1.c;NE'
private int[] queue; 4B(qVf&M
BpE[9N
public int get() { ?2c:|FD
return queue[1]; YJ`>&AJ
} |Dli6KN
LYv2ll`XP
public void remove() { kXRD_B5&
SortUtil.swap(queue,1,size--); *i90[3l
fixDown(1); ~C+T|
} #2iA-5
file://fixdown m0YDO0
private void fixDown(int k) { sS|5x
int j; $^F2
while ((j = k << 1) <= size) { SOJHw6
if (j < size %26amp;%26amp; queue[j] j++; L;<]wKs
if (queue[k]>queue[j]) file://不用交换 [rem,i+
break; =*N(8j>y
SortUtil.swap(queue,j,k); <#i'3TUR
k = j; F"I@=R-n
} sj2+|>
} rv>6k:(
private void fixUp(int k) { :PJjy6,1
while (k > 1) { Fx2&ji6u
int j = k >> 1; 3f x!\
if (queue[j]>queue[k]) 6A<aelE*i
break; ~C3-E %h@Z
SortUtil.swap(queue,j,k); K[Kc'6G
k = j; MI3_<[
} |H49FL
} &40dJ~SQ
i=rW{0c%
} bcg)K`'N
4}`MV.
} ?e*vvu33!
eyOAG4QTV
SortUtil： f}A^rWO
Px`yD3
package org.rut.util.algorithm; GfV9Ox
LE"xZxe
import org.rut.util.algorithm.support.BubbleSort; w@R-@ G
import org.rut.util.algorithm.support.HeapSort; W%x#ps5%
import org.rut.util.algorithm.support.ImprovedMergeSort; ZO}*^
import org.rut.util.algorithm.support.ImprovedQuickSort; 5NK:94&JE
import org.rut.util.algorithm.support.InsertSort; z Ey&%Ok
import org.rut.util.algorithm.support.MergeSort; 9i@*\Ada
import org.rut.util.algorithm.support.QuickSort; |tkmO:
import org.rut.util.algorithm.support.SelectionSort; ,;g:qe3D$
import org.rut.util.algorithm.support.ShellSort; l\)Q3.w
a+d|9y/k
/** Uz6B\-(0p
* @author treeroot ]|oqJ2P
* @since 2006-2-2 u Wtp2]A
* @version 1.0 C" {j0X`
*/ u]"RAH
public class SortUtil { n=~?BxB
public final static int INSERT = 1; l}{O
public final static int BUBBLE = 2; ]d0Dd")n
public final static int SELECTION = 3; N|; cG[W
public final static int SHELL = 4; riz({
public final static int QUICK = 5; IdM;N
public final static int IMPROVED_QUICK = 6; ZWv$K0agu
public final static int MERGE = 7; 1=>$c
public final static int IMPROVED_MERGE = 8; UA^E^$f:
public final static int HEAP = 9; ?hO*~w;UU|
E^s>S,U[y
public static void sort(int[] data) { b/)UN*~
sort(data, IMPROVED_QUICK); *Z(qk`e.b
} ^gy(~u
private static String[] name={ fw5AZvE6$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s<{c?4T
}; &,+ZNA`P
)+J?(&6
private static Sort[] impl=new Sort[]{ mcvTz, ;=
new InsertSort(), 6%? NNEM
new BubbleSort(), Nt)9-\T
new SelectionSort(), D6D*RTi4
new ShellSort(), a v/=x
new QuickSort(), ie)Qsw@
new ImprovedQuickSort(), 1FuChd
new MergeSort(), hd900LA}
new ImprovedMergeSort(), p"ZPv~("V
new HeapSort() {.ph)8
}; DwI)?a_+
6*%lnd+_
public static String toString(int algorithm){ qsLsyi|zG
return name[algorithm-1]; WH!<Z=#c}
} DZvpt%q
dg-pwWqN
public static void sort(int[] data, int algorithm) { zx^)Qb/EL6
impl[algorithm-1].sort(data); IQ\`n|
} {Su]P {oJ
$iV3>>;eh
public static interface Sort { jRGG5w}
public void sort(int[] data); 'Mg%G(3
} )K}b,X`($
cWm.']
public static void swap(int[] data, int i, int j) { ]uP{Sj
int temp = data; R1U\/
data = data[j]; iS{)Tll}&
data[j] = temp; H_x35|"
} bF3j*bpO"
} uzsR*x%s-