[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; "Vc|D (g
} bZWR.</
int i1=l; YdvXp/P:|
int i2=mid+1; X)]>E]X
for(int cur=l;cur<=r;cur++){ !V#*(_+n
if(i1==mid+1) pHVDug3
data[cur]=temp[i2++]; /oe0
else if(i2>r) @.cord`
data[cur]=temp[i1++]; 6C.!+km
else if(temp[i1] data[cur]=temp[i1++]; A<H]uQ>
else nUONI+6Z/
data[cur]=temp[i2++]; S|u5RU8*"|
} mhIGunK;+
} zB y%$5~Fw
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} L ~Vw`C
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改进后的归并排序: :/? Op
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package org.rut.util.algorithm.support; gjT`<CW
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import org.rut.util.algorithm.SortUtil; y'f-4E<
"AJ>pU3
/** `$ bQ8$+Ci
* @author treeroot jc6~V$3
* @since 2006-2-2 nC/T$ #G
* @version 1.0 \K9Y@jnr
*/ Rbm+V{EF&
public class ImprovedMergeSort implements SortUtil.Sort { "[A&S!
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private static final int THRESHOLD = 10; j }^?Snq
rf$[8d
/* \2@9k`
* (non-Javadoc) )tV]h#4
* $a\X(okx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tvzO)&)$
*/ _jkJw2+s\
public void sort(int[] data) { *X|%H-Q:H`
int[] temp=new int[data.length]; Dh{P23}
mergeSort(data,temp,0,data.length-1); 5.0;xz}#y
} g+.E=Ef8<4
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private void mergeSort(int[] data, int[] temp, int l, int r) { :i?c
int i, j, k; Qw%0<~<
int mid = (l + r) / 2; Z#%77!3
if (l == r) Pd 6
return; *=E4|>Ul,
if ((mid - l) >= THRESHOLD) 0\$Lnwp_
mergeSort(data, temp, l, mid); :]C\DUBo
else [MC}zd'/
insertSort(data, l, mid - l + 1); 8^-g yx'
if ((r - mid) > THRESHOLD) 8r\xQr'8h
mergeSort(data, temp, mid + 1, r); . 55aY~We
else Yic'p0< ?V
insertSort(data, mid + 1, r - mid); i3Nt?FSN
+xmZK<{<
for (i = l; i <= mid; i++) { Git2Cet
temp = data; SR)@'-Wd
} '?fn} V
for (j = 1; j <= r - mid; j++) { Yu^}
temp[r - j + 1] = data[j + mid]; v g tJ+GjN
} [iSLn3XXRX
int a = temp[l]; x~yd/ R
int b = temp[r]; [qt^gy)
for (i = l, j = r, k = l; k <= r; k++) { v#sx9$K T
if (a < b) { 0j/i):@
data[k] = temp[i++]; ~ YZi"u
a = temp; 8>:2li
} else { HoM8V"8B
data[k] = temp[j--]; VxAR,a1+n
b = temp[j]; JY>I
} wIbc8ze
} C$B?|oUJc
} VHws9)
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/** \=~<I
* @param data gwF@'Uu
* @param l !lB,2_
* @param i q%^gG03.
*/ }W%}_UT
private void insertSort(int[] data, int start, int len) { U(qM( E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z<P#djx
} {la^useg[
} R?\8SdJ
} Un[#zh<4
} &jPsdv h
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堆排序： 8|Y^z_C
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package org.rut.util.algorithm.support; Z#W`0G>'
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import org.rut.util.algorithm.SortUtil; ^jhHaN]G^
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/** &c@I4RV|q
* @author treeroot ZNA?`Z)f
* @since 2006-2-2 ?,),%JQ
* @version 1.0 ]g+(#x_.?
*/ IweQB}d
public class HeapSort implements SortUtil.Sort{ qx? lCz a"
z?YGE iR/}
/* (non-Javadoc) cRfX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s^v,i CH{
*/ KoXXNJax
public void sort(int[] data) { J<zg 'Jk^
MaxHeap h=new MaxHeap(); 4Y/!V[
h.init(data); uc"u@ _M
for(int i=0;i h.remove(); wLUmRo56aR
System.arraycopy(h.queue,1,data,0,data.length); >zhbipA
} 3i$AR
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private static class MaxHeap{ mg;AcAS.o,
i\eykYc,
void init(int[] data){ XAFTLNV>
this.queue=new int[data.length+1]; O@Kr}8^,
for(int i=0;i queue[++size]=data; Ua3ERBX{
fixUp(size); BR%:`uiQ<
} (c_hX(
} ^ pR&
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private int size=0; Zj<T#4?8
Q\z*q,^R
private int[] queue; |Z/ySAFM
&boBu^,94
public int get() { q.X-2jjpx:
return queue[1]; (6+0U1[Iz
} tE>:kx0*3
J8D-a!
public void remove() { QBo^{],
SortUtil.swap(queue,1,size--); tr}$82Po
fixDown(1); wLbnsqa
} Y{'G2)e
file://fixdown Stw6%T-
private void fixDown(int k) { y|mR'{$I
int j; Q&\k"X1
while ((j = k << 1) <= size) { v>P){VT
if (j < size %26amp;%26amp; queue[j] j++; ?d%}K76V<
if (queue[k]>queue[j]) file://不用交换 ixkg,
break; 0nd<6S+fs
SortUtil.swap(queue,j,k); MLb\:Ihy
k = j; G j:|
} t8[:}[Jx
} [6tQv<}^
private void fixUp(int k) { @'y"D
while (k > 1) { $7*Ml)H!9
int j = k >> 1; vtT:c.~d
if (queue[j]>queue[k]) &Gt9a-ne
break; +Snjb0
SortUtil.swap(queue,j,k); :4Vt
k = j; g<-cHF
} }A;Xd/,'r
} 334*nQ
wDG4rN9x
} KKzvoc?Bt
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} RPWYm
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SortUtil： $p@g#3X`
h^)2:0#{I
package org.rut.util.algorithm; dd+).*
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import org.rut.util.algorithm.support.BubbleSort; I|:j~EY
import org.rut.util.algorithm.support.HeapSort; aU!UY(
import org.rut.util.algorithm.support.ImprovedMergeSort; @mazwr{B
import org.rut.util.algorithm.support.ImprovedQuickSort; 1,J.
import org.rut.util.algorithm.support.InsertSort; x@ O:
import org.rut.util.algorithm.support.MergeSort; $b$D[4
import org.rut.util.algorithm.support.QuickSort; }R x%&29&
import org.rut.util.algorithm.support.SelectionSort; {%Y7]*D
import org.rut.util.algorithm.support.ShellSort; ;sf/tX
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/** a*8}~p,
* @author treeroot ;FBc^*q
* @since 2006-2-2 H#y"3E<s
* @version 1.0 B+LNDnjO]
*/ V_kE"W)
public class SortUtil { sFTIRVXN,
public final static int INSERT = 1; Y(f-e,
public final static int BUBBLE = 2; xd3
public final static int SELECTION = 3; 2o/`8+eJu
public final static int SHELL = 4; Fqv5WoYVf
public final static int QUICK = 5; F8I<4S
public final static int IMPROVED_QUICK = 6; @n(In$
public final static int MERGE = 7; ZJ(!jc$"*%
public final static int IMPROVED_MERGE = 8; v=>Gvl3&U
public final static int HEAP = 9; URgF8?n
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public static void sort(int[] data) { AngwBZ@
sort(data, IMPROVED_QUICK); I'C,'
} :Eyv==
private static String[] name={ 5,Y2Lzr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K;PpS*!
}; M=A9ax
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private static Sort[] impl=new Sort[]{ 1c!},O
new InsertSort(), ~}*;Ko\
new BubbleSort(), 0Pk-FSY|f
new SelectionSort(), B .mV\W
new ShellSort(), U:9vjY
new QuickSort(), (% P=#vZ
new ImprovedQuickSort(), Ev16xL8B
new MergeSort(), *zWn4BckN
new ImprovedMergeSort(), v3Yj2LSqx
new HeapSort() bB-v ar
}; ,0bM*qob
}[`?#`sW
public static String toString(int algorithm){ t,,^^ll
return name[algorithm-1]; v"+EBfx
} $wTX
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public static void sort(int[] data, int algorithm) { KoJG!Rm
impl[algorithm-1].sort(data); r `dU (T!
} -huZnDN
!%r`'|9y
public static interface Sort { @`D6F;R
public void sort(int[] data); s_!Z+D$K
} ~x:]ch|
-;$/<
public static void swap(int[] data, int i, int j) { =1\wZuK#
int temp = data; .<%M8rcj
data = data[j]; ud D[hPJd
data[j] = temp; GcW}<g}
} bf/loMtD
} ?y)X$D^