[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; SJa>!]U'xI
} P-gjSE|yh
int i1=l; KB|mtsi
int i2=mid+1; %A'mXatk
for(int cur=l;cur<=r;cur++){ Xm>zT'B_tJ
if(i1==mid+1) D:bmq93PC
data[cur]=temp[i2++]; "``>ii
else if(i2>r) ;<Hk Cd
data[cur]=temp[i1++]; 4c 8{AZ
else if(temp[i1] data[cur]=temp[i1++]; l1'v`!
else RH<2f5-sC!
data[cur]=temp[i2++]; M.}J SDt
} kBcTXl
} rDbtT*vN
JG'%HJ"D
} 1uj~/M
d]O:VghY\
改进后的归并排序: MQx1|>rG
gMF6f%
package org.rut.util.algorithm.support; [1kQ-Ko`
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import org.rut.util.algorithm.SortUtil; F%o!+%&7
4jTO:aPh_
/** R@jMFh;
* @author treeroot L{&2 P
* @since 2006-2-2 Q~Mkf&s
* @version 1.0 ?Ce=h+l
*/ S@u46X>
public class ImprovedMergeSort implements SortUtil.Sort { !(?7V
)AkBo
private static final int THRESHOLD = 10; =dA]nM
-i{_$G8W/c
/* ~nmFZ]y
* (non-Javadoc) X5/fy"g&
* 6[ 3 K@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k &J;,)V
*/ JfWkg`LqL
public void sort(int[] data) { s.Z{mnD6
int[] temp=new int[data.length]; xCXsyZ2h
mergeSort(data,temp,0,data.length-1); tyW}=xs
} nng|m
c( U,FUS
private void mergeSort(int[] data, int[] temp, int l, int r) { !"qT2<A
int i, j, k; [niFJIsc
int mid = (l + r) / 2; _3 oo%?}
if (l == r) WXmfh
return; T\.(e*hC
if ((mid - l) >= THRESHOLD) QCZ88\jX[
mergeSort(data, temp, l, mid); iw/~t
else a'jUM+D;
insertSort(data, l, mid - l + 1); TY %zw6 #p
if ((r - mid) > THRESHOLD) P}5bSQ( a3
mergeSort(data, temp, mid + 1, r); iv+a5
else g_c@Kyf
insertSort(data, mid + 1, r - mid); sYDav)L.
c:0n/DC
for (i = l; i <= mid; i++) { *izCXfW7
temp = data; Xzg >/w 8J
} )2ShoFF
for (j = 1; j <= r - mid; j++) { iTAj${ >
temp[r - j + 1] = data[j + mid]; ?.< Qgd
} ^SG>VfgC
int a = temp[l]; xJ{r9~
int b = temp[r]; W;7$Dq:
for (i = l, j = r, k = l; k <= r; k++) { mwLf)xt0'
if (a < b) { PbZ%[F
data[k] = temp[i++]; 2?q>yL!Gz
a = temp; "zY~*3d
} else { (BPp2^
data[k] = temp[j--]; 8=L"rekV_
b = temp[j]; {v]L|e%{
} $eI cCLF
} 81y<Uz 6
} 0{ mm%@o
F<p`)?
/** &}e>JgBe0
* @param data ,NZllnW
* @param l ANBuX6q
* @param i duEXp]f!
*/ fiWN^sTM
private void insertSort(int[] data, int start, int len) { \MRd4vufv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jXf@JxQ
} : pUu_
} LJ@(jO{z
} ,hI$nF0}p
} vFdI?(c-
V':A!
堆排序： 3GE;:;8B
eEVB
package org.rut.util.algorithm.support; '9WTz(0?
Yl&[_ l
import org.rut.util.algorithm.SortUtil; d"?"(Q_8n
SJP3mq/^K
/** }hg=#*
* @author treeroot myX&Z F_9
* @since 2006-2-2 D8,8j;
* @version 1.0 V;SV0~&
*/ [XI:Yf
public class HeapSort implements SortUtil.Sort{ P!f0&W
aQL0Sj:,
/* (non-Javadoc) :$K=LV#Iru
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lq_UCCnv5
*/ C=o-3w
public void sort(int[] data) { ,i}EGW,9q
MaxHeap h=new MaxHeap(); M| Gl&
h.init(data); hR|xUp
for(int i=0;i h.remove(); WZ6{9/%:
System.arraycopy(h.queue,1,data,0,data.length); SS%Bde&<{
} ]N]Fb3
9FSa=<0wE
private static class MaxHeap{ mB>0$l y
lG0CCOdQ
void init(int[] data){ PZ6R+n8
this.queue=new int[data.length+1]; B/a`5&G]
for(int i=0;i queue[++size]=data; Xykoq"dbb
fixUp(size); ej_u):G*
} #KoI8U"
} ;5X~"#%U_
AFL'Ox]0
private int size=0; \jk*Nm8;
_ s}aF
private int[] queue; NbU4|Oi
)=}qAVO8
public int get() { &aIFtlC
return queue[1]; aE)1LP
} `)8~/G%
~ i+XVo
public void remove() { f9#srIx+
SortUtil.swap(queue,1,size--); ``g
fixDown(1); AP>n-Z|
} >>J$`0kM*
file://fixdown ,}W|cm>
private void fixDown(int k) { rWJ5C\R
int j; o?/H<k\5
while ((j = k << 1) <= size) { {jYVA~.|Z
if (j < size %26amp;%26amp; queue[j] j++; B<BS^waU
if (queue[k]>queue[j]) file://不用交换 0/DO"pnL@
break; EgPL+qL
SortUtil.swap(queue,j,k); ~Sb)i f
k = j; g#74c'+
} [7PC\
} fWA#n
private void fixUp(int k) { 1SS1P0Ur
while (k > 1) { 6;Z`9PGp
int j = k >> 1; YJ,"@n_
if (queue[j]>queue[k]) ^`lDw
break; |X1axRO
SortUtil.swap(queue,j,k); EMe1!)
k = j; a_+3, fP
} rZ(#t{]=!
} .zdaY, U
hx@@[sKF7
} 3HuocwWbz
*ezMS
} u8JH~b
_y6iR&&x
SortUtil： u=L Dfn
iTdamu`L
package org.rut.util.algorithm; kw z6SObQ
`,~'T [
import org.rut.util.algorithm.support.BubbleSort; \(Nx)F
import org.rut.util.algorithm.support.HeapSort; j<!dpt
import org.rut.util.algorithm.support.ImprovedMergeSort; #9}1Lo>
import org.rut.util.algorithm.support.ImprovedQuickSort; z0\ $#r^I
import org.rut.util.algorithm.support.InsertSort; tQNc+>7k+u
import org.rut.util.algorithm.support.MergeSort; $2*_7_Qb
import org.rut.util.algorithm.support.QuickSort; b4^O=
import org.rut.util.algorithm.support.SelectionSort; |;|r[aU
import org.rut.util.algorithm.support.ShellSort; :Wx7a1.Jz
gzhIOeY
/** cZYvP
* @author treeroot q,7W,<-
* @since 2006-2-2 `'iO+/;GY
* @version 1.0 ;lE=7[UJ3X
*/ #E Bdg
public class SortUtil { u!~kmIa4
public final static int INSERT = 1; rd%uc~/
public final static int BUBBLE = 2; Z>R@
public final static int SELECTION = 3; 2K/t[.8
public final static int SHELL = 4; {7oPDP
public final static int QUICK = 5; o8:9Yjs
public final static int IMPROVED_QUICK = 6; #w5%^HwO
public final static int MERGE = 7; tR9iFv_
public final static int IMPROVED_MERGE = 8; 5#|&&$)
public final static int HEAP = 9; KAE %Wwjr
/0k'w%V{n
public static void sort(int[] data) { }sqFvab<
sort(data, IMPROVED_QUICK); /,~]1&?}1
} B+Qo{-
private static String[] name={ !.#g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]vR Ol.
}; ex~"M&^
32 j){[PL3
private static Sort[] impl=new Sort[]{ 0 5?`W&:9
new InsertSort(), /YPG_,lRA
new BubbleSort(), 8VU(+%X
new SelectionSort(), WQCnkP
new ShellSort(), &m36h`tM
new QuickSort(), POl-S<QV
new ImprovedQuickSort(), E[ -yfP~[
new MergeSort(), C%<Dq0j
new ImprovedMergeSort(), aLLI\3
new HeapSort() uIO?4\s&G
}; 1Ci^e7|?
]QY-LO(
public static String toString(int algorithm){ 6||%T$_;}
return name[algorithm-1]; C[TjcHoA
} c^H#[<6p
f:P;_/cJc
public static void sort(int[] data, int algorithm) { x{!+4W;S
impl[algorithm-1].sort(data); v h)CB8
} $_'<kH-eP
ncUhCp?'
public static interface Sort { so.}WU
public void sort(int[] data); #%$@[4"V
} YVF@v-v-,
[Pq |6dz
public static void swap(int[] data, int i, int j) { >2K'!@~'
int temp = data; 3zfpFgD!
data = data[j]; 4Hyp]07
data[j] = temp; )D+eWo
} =s:kC`O
} e)-$#qW