[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; UR\*KR;yM
} jjwY{jV
int i1=l; fu|I(^NV
int i2=mid+1; 5H5<ft,
for(int cur=l;cur<=r;cur++){ dW=]|t&
if(i1==mid+1) %>s y`c
data[cur]=temp[i2++]; ]02V,'x
else if(i2>r) ._nhW*
data[cur]=temp[i1++]; }X`K3sk2/z
else if(temp[i1] data[cur]=temp[i1++]; R"tLu/Sn
else F!Uk`[L
data[cur]=temp[i2++]; * 5j iC
} +[>m`XTq
} 2qEy"DKu
V^Nc0r
} "B\qp"N
l^SKd
改进后的归并排序: v<c8qg
} o=g)
package org.rut.util.algorithm.support; @hCGV'4
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import org.rut.util.algorithm.SortUtil; +XQS -=
<?I~ +
/** 1M+mH#?
* @author treeroot ^,rbA>/L
* @since 2006-2-2 L-Hl.UV
* @version 1.0 |+[bKqI5
*/ h qxe
public class ImprovedMergeSort implements SortUtil.Sort { m=#2u4H4
)UxF lp;\
private static final int THRESHOLD = 10; oZIoY*7IrQ
BeVQ[
/* .qHgQ_%
* (non-Javadoc) !]"T`^5,Y
* cLXMq"?C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eQNYfWR
*/ }6o` in>M
public void sort(int[] data) { %II |;<
int[] temp=new int[data.length]; Mbi)mybM
mergeSort(data,temp,0,data.length-1); lT%o6qgT
} BO1Mz=q
{?t=*l\S{w
private void mergeSort(int[] data, int[] temp, int l, int r) { V43|Ej}E
int i, j, k; 7wZKK0;T
int mid = (l + r) / 2; ~UL;O\-b0
if (l == r) f-3lJ?6
return; }?H|9OS
if ((mid - l) >= THRESHOLD) x&kF;UC
mergeSort(data, temp, l, mid); khyVuWN
else 2"13!s
insertSort(data, l, mid - l + 1); 'Yj/M
if ((r - mid) > THRESHOLD) UGAP$_j ]P
mergeSort(data, temp, mid + 1, r); `M|fwlAJQ
else C`DTPoXN
insertSort(data, mid + 1, r - mid); O8M;q!)y
eE7+fMP{
for (i = l; i <= mid; i++) { j]jwQRe
temp = data; 5Zh /D0!|
} )K%AbKn
for (j = 1; j <= r - mid; j++) { )WD<Q x&
temp[r - j + 1] = data[j + mid]; &OsJnkY<<
} JH2d+8O:qK
int a = temp[l]; Of-l<Ks\
int b = temp[r]; L-q.Q
for (i = l, j = r, k = l; k <= r; k++) { oo<,hOv
if (a < b) { Bl(we/r
data[k] = temp[i++]; w%`7,du|
a = temp; ?a(ApD\
} else { 4D0"Y#&G
data[k] = temp[j--]; $_NVy>\&
b = temp[j]; Z~v.!j0
} ;Q\Duj
} l].dOso$`
} O,hT< s "
VBy=X\w]
/** V:yia^1
* @param data \]GBd~i<
* @param l `2}Mz9mk
* @param i C?X^h{Tp
*/ lNqYpyvy*
private void insertSort(int[] data, int start, int len) { xMU4Av[{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =r#of|`Q
} pYH#Vh
} s_u@8e 6_
} va| 1N/&
} LG@5Z-
r 5:DIA!
堆排序： /wKL"M-%
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package org.rut.util.algorithm.support; U+URj <)
fgq#Oi}
import org.rut.util.algorithm.SortUtil; L`tr7EEr
[>v.#:YM^
/** +Y6=;*j$
* @author treeroot E]i3E[T
* @since 2006-2-2 ]w"r4HlCx
* @version 1.0 [Jwo,?w
*/ '4ftclzL
public class HeapSort implements SortUtil.Sort{ j$,:cN
$O?&!8);,
/* (non-Javadoc) 3D(/k%;)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R8sj>.I9j
*/ 0M>+.}e+
public void sort(int[] data) { 4uwI=UUB
MaxHeap h=new MaxHeap(); DFcgUEq
h.init(data); EH=[!iW;
for(int i=0;i h.remove(); X6kCYTJYF
System.arraycopy(h.queue,1,data,0,data.length); H)ud?vB6
} MQ7N8@!t
,eW K~ pa
private static class MaxHeap{ JN,4#,
^cn%]X#.
void init(int[] data){ Il`35~a
this.queue=new int[data.length+1]; =# <!s!
for(int i=0;i queue[++size]=data; JgEPzHgx
fixUp(size); ">@]{e*
} K)QMxn
} 0NL~2Qf_4
C|*U)#3:F
private int size=0; W9+H/T7!
I r]#u]Ap
private int[] queue; OWx-I\:
;p)RMRMg
public int get() { 3MH9%*w'0
return queue[1]; Zi/tax9C
} u$O` \=
oSq?.*w<
public void remove() { ark~#<SqAr
SortUtil.swap(queue,1,size--); #rD0`[pz
fixDown(1); clV3x`z
} m&a.i B
file://fixdown W US[hx,
private void fixDown(int k) { H|JPqBNRh
int j; Jz<-B
while ((j = k << 1) <= size) { 98'/yZ
if (j < size %26amp;%26amp; queue[j] j++; g0O~5.f
if (queue[k]>queue[j]) file://不用交换 F>RL&i
break; Q8.=w
SortUtil.swap(queue,j,k); ]Dec/Nnj
k = j; :7>oFz
} iI.pxo s
} _Wg?H:\
private void fixUp(int k) { 69N/_V
while (k > 1) { 3CcCcZ9I
int j = k >> 1; h}0}g]IUx
if (queue[j]>queue[k]) o^+2%S`]
break; 5nF46c
SortUtil.swap(queue,j,k); +Np[m$Z*
k = j; MkLXMwuQ&
} kD;1+lNz
} P|j|0o,8p
Cw$0XyO
} n/9.;9b$I
`xv2,Z9<
} UI2TW)^2
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SortUtil： pW5ch"HE
#!?jxfsFa
package org.rut.util.algorithm; ?TWve)U
*^aEUp6&
import org.rut.util.algorithm.support.BubbleSort; h@AKfE!\~
import org.rut.util.algorithm.support.HeapSort; )SU\s+"M
import org.rut.util.algorithm.support.ImprovedMergeSort; /~~A2.=.
import org.rut.util.algorithm.support.ImprovedQuickSort; fVJlA
import org.rut.util.algorithm.support.InsertSort; 4|U$ON?x
import org.rut.util.algorithm.support.MergeSort; O"^3,-
import org.rut.util.algorithm.support.QuickSort; R.x^
import org.rut.util.algorithm.support.SelectionSort; Y=83r]%
import org.rut.util.algorithm.support.ShellSort; nSy{{d
RISDjU3
/** $/p0DY
* @author treeroot {#`O'F>
* @since 2006-2-2 Y8v13"P6
* @version 1.0 f |%II,!3
*/ I-Q@v`
public class SortUtil { ZNDn! Sj
public final static int INSERT = 1; +}VaQ8ti4
public final static int BUBBLE = 2; _ck)yY?7
public final static int SELECTION = 3; 11VtC)
public final static int SHELL = 4; b!p]\B!
public final static int QUICK = 5; ,ArHS
public final static int IMPROVED_QUICK = 6; qPQ6`rD\
public final static int MERGE = 7; Nwwn #+
public final static int IMPROVED_MERGE = 8; %cO^:
public final static int HEAP = 9; 7F5v-/
)d~{gPr.
public static void sort(int[] data) { )2sE9G,
sort(data, IMPROVED_QUICK); S2i*Li
} Xfc+0$U@
private static String[] name={ Y-?0!a=e.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |E?PQ?P
}; W{RZ@3ZY
HOaNhJ{7D
private static Sort[] impl=new Sort[]{ g?.y7!m
new InsertSort(), ]SC|%B_*
new BubbleSort(), LUs)"ZAi|
new SelectionSort(), /9pN.E
new ShellSort(), mO=A50_&,Q
new QuickSort(), O*7vmPy
new ImprovedQuickSort(), m>{a<N
new MergeSort(), -=cxUDB
new ImprovedMergeSort(), NiH =T
new HeapSort() ~] &yHzp2
}; lfw|Q@
0Ra%>e(I^
public static String toString(int algorithm){ CM%Rz-c
return name[algorithm-1]; ]4ib^R~Z
} 5^ck$af
38GkV.e}$
public static void sort(int[] data, int algorithm) { m]+~F_/
impl[algorithm-1].sort(data); K'Y/0:"*
} N_^PoX935O
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public static interface Sort { tVv/G~(
public void sort(int[] data); G! Y l0Zr
} ,&~-Sq)~
,<=gPs;x
public static void swap(int[] data, int i, int j) { )2lB
int temp = data; $l $p|
data = data[j]; W:maE9E=
data[j] = temp; ^sKdN-{
} AQ&vq$
} s\zY^(v4