[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; uJAB)ti2I
} v:;C|uE|
int i1=l; 9#=IrlV4
int i2=mid+1; !AD,
for(int cur=l;cur<=r;cur++){ x:D<Mu#
if(i1==mid+1) @+Anv~B.
data[cur]=temp[i2++]; W3{5Do.h
else if(i2>r) oR%E_g?mI~
data[cur]=temp[i1++]; k3htHCf*G$
else if(temp[i1] data[cur]=temp[i1++]; zj$Z%|@$
else !C)>
data[cur]=temp[i2++]; =<tJAoVV
} -:1Gr8
} TY{?4
t+Tg@~K2[>
} (^OC%pc
6T'43h. :
改进后的归并排序: 3By>t!~Q
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package org.rut.util.algorithm.support; @0x.n\M_
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import org.rut.util.algorithm.SortUtil; vXWESy
Dqo:X`<bT
/** qi5>GX^t]b
* @author treeroot S g_?.XZc[
* @since 2006-2-2 ^O\1v
* @version 1.0 7*8nUq
*/ j2&OYg
public class ImprovedMergeSort implements SortUtil.Sort { w})&[d
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private static final int THRESHOLD = 10; oFx gR9
|Z)/
/* UqQZ A0e
* (non-Javadoc) kc/H
* KgkB)1s@n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LSOwa
*/ 3 mMdq*X5
public void sort(int[] data) { Ra,on&OP`*
int[] temp=new int[data.length]; O8}s*}]
mergeSort(data,temp,0,data.length-1); U";Rp&\3;
} Z-r0 D
&[\arwe)
private void mergeSort(int[] data, int[] temp, int l, int r) { ;]ZHD$g
int i, j, k; ViC76aJ
int mid = (l + r) / 2; vf'jz`Z
if (l == r) G37L 9IG-M
return; R5YtCw]i=
if ((mid - l) >= THRESHOLD) Q0cf]
mergeSort(data, temp, l, mid); xuC6EK+
else kys-~&@+
insertSort(data, l, mid - l + 1); 53#5p;k
if ((r - mid) > THRESHOLD) L?5t<`#lw
mergeSort(data, temp, mid + 1, r); iO#xIl<
else a\.?{/
insertSort(data, mid + 1, r - mid); z:q'?{`I
\fGYJ37
for (i = l; i <= mid; i++) { 9#ay(g
temp = data; >L3p qK
} S6Xw+W02
for (j = 1; j <= r - mid; j++) { 6I'VXdeN
temp[r - j + 1] = data[j + mid]; uqH! eN5
} . *+7xL
int a = temp[l]; bJu,R-f
int b = temp[r]; TuPxyB
for (i = l, j = r, k = l; k <= r; k++) { hYQ%|CBXBR
if (a < b) { ).6/ii9gt
data[k] = temp[i++]; @o.i2iG
a = temp; .oOt(K+
} else { %JU23c*
data[k] = temp[j--]; a*@Z^5f
b = temp[j]; |[t=.dK%
} 8&AorYw[
} Z\yLzy#8
} D.JVEKLkU
x~I1(l7r
/** VY26Cf"
* @param data #k]0[;1os
* @param l A.*nDl`H
* @param i trA `l/
*/ Y{B_OoTun
private void insertSort(int[] data, int start, int len) { ;5S7_p2]j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SVeU7Q6-
} = ft$j
} w4/)r-Z4I
} T{kwy3
} %Y[/Ucdm
DD3yl\#,
堆排序： Fgq*3t
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package org.rut.util.algorithm.support; jWjK-q@Y
v\T1,Z@N^
import org.rut.util.algorithm.SortUtil; \YyU5f7';
Ji:@z%osr
/** 2{qG
* @author treeroot k0=y_7 =(5
* @since 2006-2-2 )x $Vy=
* @version 1.0 |iThgq_\z
*/ f\_Q+!^
public class HeapSort implements SortUtil.Sort{ y(g Otg
` R-np_
/* (non-Javadoc) Rla*hc~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eJdQ7g[>
*/ X'p%$HsMG
public void sort(int[] data) { .=<pU k 3G
MaxHeap h=new MaxHeap(); ) FsSXnZL
h.init(data); $G.|5sEk
for(int i=0;i h.remove(); %}MM+1eu
System.arraycopy(h.queue,1,data,0,data.length); )O'<jwp$
} %5w)}|fw
yL,B\YCf8
private static class MaxHeap{ !KW)*
z{_Vn(Kg
void init(int[] data){ UeTp,
this.queue=new int[data.length+1]; ?=Qg
for(int i=0;i queue[++size]=data; -B! TA0=oJ
fixUp(size); k18V4ATE]
} O
} U5s]dUs (
cSWVHr
private int size=0; CawVC*b3
$fG/gYvI\
private int[] queue; Y)5}bmL
l0o_C#"<S
public int get() { Wx`IEPsVbk
return queue[1]; B*Xh$R
} D~);:}}>
!y0 O['7
public void remove() { qa#F}aGd
SortUtil.swap(queue,1,size--); ^DJU99
fixDown(1); T!$HVHh&,}
} 2?&ptN)`N
file://fixdown `84yGXLK
private void fixDown(int k) { &WS%sE{p_
int j; =i<(hgD
while ((j = k << 1) <= size) { eu/Sp3@v
if (j < size %26amp;%26amp; queue[j] j++; s47"JKf"
if (queue[k]>queue[j]) file://不用交换 o?\Pw9Y
break; l^Z~^.{y
SortUtil.swap(queue,j,k); oDK\v8w-
k = j; 7qp|Msf},
} 6YbSzx`?k
} I>|?B(F
private void fixUp(int k) { `_kRvpi
while (k > 1) { 5T*7HC[
int j = k >> 1; pm|]GkM
if (queue[j]>queue[k]) 3j#F'M)s{
break; <Z_`^~!
SortUtil.swap(queue,j,k); xJlq2cK
k = j; '!GI:U+g
} $x0F(|wxt
} W;yZ$k#q}(
"=O)2}
} }R(_^@]
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} S d -+a
j$Co-b1
SortUtil： p `Z7VG
%&NK|M+n
package org.rut.util.algorithm; ^hJ,1{o
<#Dc(VhT
import org.rut.util.algorithm.support.BubbleSort; ppS`zqq $
import org.rut.util.algorithm.support.HeapSort; %UhF=C
import org.rut.util.algorithm.support.ImprovedMergeSort; G3n7x?4m
import org.rut.util.algorithm.support.ImprovedQuickSort; |&.)_+w
import org.rut.util.algorithm.support.InsertSort; 4T-AWk
import org.rut.util.algorithm.support.MergeSort; l"Q8`
import org.rut.util.algorithm.support.QuickSort; \U8Vsx1tl
import org.rut.util.algorithm.support.SelectionSort; 2q bpjm
import org.rut.util.algorithm.support.ShellSort; (6b%;2k
?U[AE -*
/** w0SgF/"@
* @author treeroot z9ZAY!Zhq]
* @since 2006-2-2 +g&W423k_
* @version 1.0 jHzb,&
*/ S{06bLXU"
public class SortUtil { 73X]|fy
public final static int INSERT = 1; 4B 6Aw?
public final static int BUBBLE = 2; ^}#!?"Y
public final static int SELECTION = 3; KYaf7qy]
public final static int SHELL = 4; c{q`uI;O
public final static int QUICK = 5; 7v_e"[s~
public final static int IMPROVED_QUICK = 6; A>k;o0r
public final static int MERGE = 7; 1-fz564
public final static int IMPROVED_MERGE = 8; Zx{'S3W
public final static int HEAP = 9; _BV:i:z
s.R(3}/
public static void sort(int[] data) { jXQ_7
sort(data, IMPROVED_QUICK); Q)/q h;Ru
} i)ctrdP-
private static String[] name={ =r2d{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H'.d'OE:I
}; -mF9Skj
!ywc).]e
private static Sort[] impl=new Sort[]{ #SmWF|/
new InsertSort(), -1:asM7
new BubbleSort(), W\ckt]'
new SelectionSort(), PE>_;k-@k
new ShellSort(), 5s9~rm
new QuickSort(), qZ.\GHS
new ImprovedQuickSort(), 9"e!0Q40
new MergeSort(), Y|L57F
new ImprovedMergeSort(), wl4yNC
new HeapSort() S/|8'x{<
}; eAj}/2y"
D3OV.G]`
public static String toString(int algorithm){ O(VV-n7U
return name[algorithm-1]; X"]ZV]7(]s
} z&8#1'
?.H*!u+9>
public static void sort(int[] data, int algorithm) { m,b<b91
impl[algorithm-1].sort(data); ~[{| s')
} *SZ<ori
J.*=7zmw
public static interface Sort { xnTky1zq
public void sort(int[] data); N Jf''e3
} D{mu2'q
+q;^8d>
public static void swap(int[] data, int i, int j) { G(- `FH
int temp = data; wFD.3!
data = data[j]; x8^Dhpr6
data[j] = temp; 9bB~r[k
} a)e2WgVB/E
} M:~#"lfK