[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; 5EFow-AH
} cw/g1,p
int i1=l; P;MS%32
int i2=mid+1; fk*JoR.o
for(int cur=l;cur<=r;cur++){ >f'nl
if(i1==mid+1) q0`Vw%
data[cur]=temp[i2++]; q_OIzZ@
else if(i2>r) %Q1v8l.}
data[cur]=temp[i1++]; R@=ve %a-
else if(temp[i1] data[cur]=temp[i1++]; Rk"VFe>r
else [jDO8n/
data[cur]=temp[i2++]; #ZCgpg$wM
} 67 7p9{:
} RW,ew!Z
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} 15iCJ p
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改进后的归并排序: -gIuL
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package org.rut.util.algorithm.support; :n0(gB
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import org.rut.util.algorithm.SortUtil; 7#MBT-ih
]pB0bJAt
/** :&6QKTX
* @author treeroot (66X
* @since 2006-2-2 gLl?e8[F
* @version 1.0 pF K[b
*/ gBYL.^H^l
public class ImprovedMergeSort implements SortUtil.Sort { Hi,_qlc+
m ~fqZK
private static final int THRESHOLD = 10; y<BiR@%,7
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/* ]8+%57:E
* (non-Javadoc) +**H7: bO
* ^T(l3r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =ub&@~E
*/ "Z&qOQg%3
public void sort(int[] data) { ^yy\CtG
int[] temp=new int[data.length]; O4\GL
mergeSort(data,temp,0,data.length-1); .N_0rPO,Kw
} *S~. KW[
^w8H=UkP!+
private void mergeSort(int[] data, int[] temp, int l, int r) { [xO^\oQa=c
int i, j, k; DXSZ#^,S[W
int mid = (l + r) / 2; ;NLL?6~
if (l == r) (z ;=3S
return; <g>_#fz"K
if ((mid - l) >= THRESHOLD) 2?QIK3"v
mergeSort(data, temp, l, mid); C([;JO 11[
else *3S,XMS{O
insertSort(data, l, mid - l + 1); $aE%W? \
if ((r - mid) > THRESHOLD) lk6mu
mergeSort(data, temp, mid + 1, r); <~"qz*_
else T-fW[][&$
insertSort(data, mid + 1, r - mid); 4{CVBowi
hAG++<H{
for (i = l; i <= mid; i++) { 6by5VESx
temp = data; lCWk)m8
} w gATfygr
for (j = 1; j <= r - mid; j++) { ^CZn<$
temp[r - j + 1] = data[j + mid]; ;?=] ffa{
} iP|h];a+@
int a = temp[l]; Va(R*38k
int b = temp[r]; B*Hp
for (i = l, j = r, k = l; k <= r; k++) { k/?+jb
if (a < b) { ghbxRnU}
data[k] = temp[i++]; n$5,B*
a = temp; swi|
} else { &p8K0 |
data[k] = temp[j--]; LNXhzW
b = temp[j]; MCL?J,1?r
} Y_Ej-u+>{
} #96E^%:zL
} ecA0z c~
B wtD!de$
/** jBI VZ!X
* @param data w^G<]S{l
* @param l }`f%"Z
* @param i )w;XicT
*/ q6H90Zb
private void insertSort(int[] data, int start, int len) { !rTh+F*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $Jb+}mlT
} W zy8
} NkNw9?:#4
} bi#o1jR
} o2a`4K
ln9MVF'!&
堆排序： ^Bm9yR
yZmQBh$
package org.rut.util.algorithm.support; $w+g%y)
CWCE}WU>4
import org.rut.util.algorithm.SortUtil; BI4p3-
^4B6IF*
/** yK"U:X
* @author treeroot c{|soc[#
* @since 2006-2-2 ? Ew>'(Q
* @version 1.0 >9<h?F%S
*/ r^WO$u|@i
public class HeapSort implements SortUtil.Sort{ <X|"5/h
2x$\vL0
/* (non-Javadoc) (tyo4Tz1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (V{bfDu&h@
*/ r{>tTJFD(:
public void sort(int[] data) { >/5D/}4
MaxHeap h=new MaxHeap(); ;`X-.45
h.init(data); kl3#&>e
for(int i=0;i h.remove(); qZ`@Ro
System.arraycopy(h.queue,1,data,0,data.length); kj@#oLd%
} Qs#v/r
^a<=@0|
private static class MaxHeap{ WAqR70{KM
#mx;t3ja7
void init(int[] data){ RL.%o?<&?
this.queue=new int[data.length+1]; L G{N
for(int i=0;i queue[++size]=data; 7lR(6ka&/
fixUp(size); P1Re7/
} 47`{ e_YP0
} 3"I1'+
*7BY$q
private int size=0; !G`w@E9M)
2ZIf@C{P.
private int[] queue; pfZn<n5p
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public int get() { =*"Amd,
return queue[1]; uW Q`
} wqA5GK>m2
)ckx&e
public void remove() { &[R&@l Y
SortUtil.swap(queue,1,size--); (5_oH
fixDown(1); AWD &K!
} ={={W
file://fixdown T_v
private void fixDown(int k) { r-4I{GPb
int j; 0e:KiUr
while ((j = k << 1) <= size) { J +<|8D
if (j < size %26amp;%26amp; queue[j] j++; VR*5}Qp
if (queue[k]>queue[j]) file://不用交换 q_cqjly<
break; PJO;[: .I
SortUtil.swap(queue,j,k); 0S/&^
k = j; \ E[0KvN;O
} PCt&66F
} 8Q#&=]W$
private void fixUp(int k) { sDJ5'ul
while (k > 1) { Br\/7F
int j = k >> 1; V&h,v%$
if (queue[j]>queue[k]) eA{,=,v)
break; 6K?+adKlc
SortUtil.swap(queue,j,k); &/=xtO/Z{
k = j; zx#d_SVi
} <XCH{Te1
} 47$JN}qI0
>s[}f6*2@
} Z#7HuAF{]
+1h^9Y'
} bTHJbpt*-
GN=F-*2
SortUtil： ~;bwfp_
w<\N-J|m
package org.rut.util.algorithm; dn%/SJC
bsqoR8
import org.rut.util.algorithm.support.BubbleSort; Q6Jb]>g\H
import org.rut.util.algorithm.support.HeapSort; G!0|ocE}
import org.rut.util.algorithm.support.ImprovedMergeSort; O}#*U+j
import org.rut.util.algorithm.support.ImprovedQuickSort; M 80Us.
import org.rut.util.algorithm.support.InsertSort; iDHmS6_c
import org.rut.util.algorithm.support.MergeSort; RoJ&dK
import org.rut.util.algorithm.support.QuickSort; ;#rtV;
import org.rut.util.algorithm.support.SelectionSort; `z+:Z>>
import org.rut.util.algorithm.support.ShellSort; U?xl%qF`)
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/** Br-y`s~cP
* @author treeroot #cjB <APY
* @since 2006-2-2 #BT= K
* @version 1.0 UT[KwM{y
*/ JhB{aW>
public class SortUtil { M&Ycw XV:Z
public final static int INSERT = 1; v oC< /}E
public final static int BUBBLE = 2; |mMW"(~
public final static int SELECTION = 3; tkNuM0
public final static int SHELL = 4; ':.d,x)
public final static int QUICK = 5; qDcl;{L
public final static int IMPROVED_QUICK = 6; F\,3z7s
public final static int MERGE = 7; Y`lC4*g
public final static int IMPROVED_MERGE = 8; MzJ5_}
public final static int HEAP = 9; "uZ'oN
8&dmH&
public static void sort(int[] data) { 0Apvuf1
sort(data, IMPROVED_QUICK); M{O2O(
} v[F_r
private static String[] name={ {(xNC#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ai#W. n
}; #-e3m/>
8&`s wu&
private static Sort[] impl=new Sort[]{ xo^_;(;
new InsertSort(), <`6-J `.
new BubbleSort(), joM98H@
new SelectionSort(), K;[V`)d'
new ShellSort(), fFSW\4JD=
new QuickSort(), OP:;?Fs9`
new ImprovedQuickSort(), tb0s+rb
new MergeSort(), 9H.E15B
new ImprovedMergeSort(), u7a4taM$d
new HeapSort() 9%\q*
}; ;h
BMFpkK9|
public static String toString(int algorithm){ I"<~!krt%
return name[algorithm-1]; ps<JKHC/c
} |mmIu_
?P"ht
public static void sort(int[] data, int algorithm) { m;Sw`nw?
impl[algorithm-1].sort(data); -R6z/P(}
} ?*}V>h 8m)
VZ_4B *D
public static interface Sort { J5|Dduv
public void sort(int[] data); o^DiIoor
} yDy3;*lE
27,WP-qie
public static void swap(int[] data, int i, int j) { U R@'J@V#:
int temp = data; 2!&:V]
data = data[j]; 9O}YtX2
data[j] = temp; $lV0TCgba8
} `$MO.K{
} L$(W* PG}