[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; w>W`8P_b@
} Ft)Z'&L
int i1=l; L!]~J?)
int i2=mid+1; ttK`*Ng
for(int cur=l;cur<=r;cur++){ P_w\d/3
if(i1==mid+1) ,LHQ@/}A C
data[cur]=temp[i2++]; Mn=5yU
else if(i2>r) n_Ka+Y<
data[cur]=temp[i1++]; a}w%k
else if(temp[i1] data[cur]=temp[i1++]; OLdD3OI
else P6E=*^^m(
data[cur]=temp[i2++]; %$l^C!qcY
} Twj?SV
} ;I+"MY7D
oYG].PC
} 7Z;w<b~
O(( kv|X4
改进后的归并排序: !^|%Z
I'[hvp
package org.rut.util.algorithm.support; hR$lX8
`>q|_w\e
import org.rut.util.algorithm.SortUtil; v0dFP0.;&
N+vU@)_lC
/** u%7a&1c
* @author treeroot `tkd1M
* @since 2006-2-2 p]zYj >e
* @version 1.0 m7XJe[O
*/ x\Y%/C[Kc
public class ImprovedMergeSort implements SortUtil.Sort { wnE c
a*pZcv<
private static final int THRESHOLD = 10; |-zwl8E
5g-apod
/* :8_`T$8i4
* (non-Javadoc) 9@yP;{Q
* -%=StWdb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $l&&y?()
*/ )Q\ZYCPOr
public void sort(int[] data) { P#H#@:/3
int[] temp=new int[data.length]; '^l/e: (H3
mergeSort(data,temp,0,data.length-1); |7Q8WjCQ{m
} wYf=(w\c
WRAW%?$
private void mergeSort(int[] data, int[] temp, int l, int r) { V=|^r?
int i, j, k; `~(C\+gUp
int mid = (l + r) / 2; ,h2q37
if (l == r) %uGA+ \b
return; B-[SUmHr
if ((mid - l) >= THRESHOLD) Xl6)&
mergeSort(data, temp, l, mid); &,Q{l$`X
else AEwb'
insertSort(data, l, mid - l + 1); UBRMV s
if ((r - mid) > THRESHOLD) *eXO?6f%s^
mergeSort(data, temp, mid + 1, r); FZ>*<&
else |?Q(4(D`*
insertSort(data, mid + 1, r - mid); FGx_qBG4|
hkgPC-
for (i = l; i <= mid; i++) { T , =ga
temp = data; J'O`3!Oy/
} 3i(k6)H$4
for (j = 1; j <= r - mid; j++) { GxZQ{ \
temp[r - j + 1] = data[j + mid]; (?\ZN+V)
} [Pp#l*
int a = temp[l]; l``1^&K
int b = temp[r]; 7IJb$af:;
for (i = l, j = r, k = l; k <= r; k++) { -e(2?Xq9
if (a < b) { YY!(/<VI
data[k] = temp[i++]; |V9%@ Y?
a = temp; qd|*vE
} else { @@|E1'c7
data[k] = temp[j--]; *A\NjXJl~
b = temp[j]; J-PzIFWd
} _R(5?rG,
} rF0zGNH
} @?]-5~3;
om_&|9B)
/** IVNNiNN*5
* @param data ['km'5uZ^
* @param l ~POeFZ
* @param i , D1[}Lr=K
*/ 9_>4~!x`
private void insertSort(int[] data, int start, int len) { .;KupQ;*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qk,cp},2K
} ,Vs:Lle
} hTG d Uw]
} @&ZTEznbyt
} _TPo=}Z
+~fu-%,k
堆排序： ~$\j$/A8/
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package org.rut.util.algorithm.support; zRJy3/>
oM7^h3R
import org.rut.util.algorithm.SortUtil; ONGe/CEXT
17i^|&J6}:
/** *i?qOv/=>
* @author treeroot &\X;t|
* @since 2006-2-2 %|,<\~P
* @version 1.0 xRY5[=97
*/ -.*\J|S@g
public class HeapSort implements SortUtil.Sort{ ^n2w6U0
"G,*Z0V5
/* (non-Javadoc) H);'\]_'x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /*O,T
*/ =5|5j!i=q
public void sort(int[] data) { a,4g`?
MaxHeap h=new MaxHeap(); aBI]' D;
h.init(data); 4By-+C*
for(int i=0;i h.remove(); lhI;K4#
System.arraycopy(h.queue,1,data,0,data.length); sR9F:
} ~+np7
$KKaA{0-
private static class MaxHeap{ >eTlew<5
1wgu%$|d
void init(int[] data){ ~ 9;GD4
this.queue=new int[data.length+1]; (>K$gAQH
for(int i=0;i queue[++size]=data; JJ~?ON.H
fixUp(size); "P{&UwMmh
} 4r. W:}4:
} XJzXxhk2
$aA.d^
private int size=0; 1 ~7_!
Ax0,7,8y
private int[] queue; ZYsFd_
jyGVbno`
public int get() { xB(:d'1|
return queue[1]; ffM(il/2
} @EY}iK~
3I5WDuq
public void remove() { #I?iR3u
SortUtil.swap(queue,1,size--); i-?zwVmn
fixDown(1); QVW6SY
} $P(nh'\
file://fixdown DH !Br
private void fixDown(int k) { A,{D9-%
int j; \Wc/kY3&
while ((j = k << 1) <= size) { s.sy7%{
if (j < size %26amp;%26amp; queue[j] j++; TyWy5J< :+
if (queue[k]>queue[j]) file://不用交换 <dL04F
break; #'x?)AS
SortUtil.swap(queue,j,k); AE&n^vdQW
k = j; W6O.E
} *?D2gaCta
} $/TA5h
private void fixUp(int k) { n:'BN([]o
while (k > 1) { d&bc>Vt
int j = k >> 1; g&TCff
if (queue[j]>queue[k]) j#,M@CE
break; 0xUj#)
SortUtil.swap(queue,j,k); (u&yb!`
k = j; j dhml%pAd
} AtlR!IEUb
} ]zU<=b@
?ev G=S4>
} +)JqEwCrq
yl<$yd0Zdu
} htYrv5q=M
M5kHD]b
SortUtil： %`T5a<
s66XdM
package org.rut.util.algorithm; HoE.//b
R%_H\-wo
import org.rut.util.algorithm.support.BubbleSort; eBTedSM?t
import org.rut.util.algorithm.support.HeapSort; Vfm #UvA
import org.rut.util.algorithm.support.ImprovedMergeSort; SE)j}go
import org.rut.util.algorithm.support.ImprovedQuickSort; DUKmwKM"k
import org.rut.util.algorithm.support.InsertSort; %4|}&,%%r
import org.rut.util.algorithm.support.MergeSort; pZ~>l=-
import org.rut.util.algorithm.support.QuickSort; M(zY[O
import org.rut.util.algorithm.support.SelectionSort; _@pf1d$
import org.rut.util.algorithm.support.ShellSort; ~oA9+mT5
Xb@z7X#O!
/** wu!_BCIy
* @author treeroot 8+|V!q
* @since 2006-2-2 uxMy1oy
* @version 1.0 J=SB/8tQ)T
*/ !BQ ELB$0
public class SortUtil { K'5sn|)
public final static int INSERT = 1; ^$+f3Z'
public final static int BUBBLE = 2; [{p?BTs
public final static int SELECTION = 3; @EP{VV
public final static int SHELL = 4; Ky9No"o
public final static int QUICK = 5; ZYR,8y
public final static int IMPROVED_QUICK = 6; xDA,?i;T 0
public final static int MERGE = 7; {iIg 4PzrU
public final static int IMPROVED_MERGE = 8; aRO_,n9
public final static int HEAP = 9; aU.0dsq
`-K)K<
public static void sort(int[] data) { _h=<_Z
sort(data, IMPROVED_QUICK); h/0-Mrk;e
} XJlDiBs9=Q
private static String[] name={ C+(Gg^ w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N7$DRG/<b
}; 18p3
v`+n`DT
private static Sort[] impl=new Sort[]{ sx(l
new InsertSort(), ?V5Pt s
new BubbleSort(), ??zABV
new SelectionSort(), AY/-j$5+?
new ShellSort(), OZC/+"\,
new QuickSort(), j^$3vj5E[
new ImprovedQuickSort(), o.A}``
new MergeSort(), <7FP"YU
new ImprovedMergeSort(), +NLQYuN
new HeapSort() Q9eYF-+
}; !skb=B#
cGpN4|*rQ
public static String toString(int algorithm){ ))CXjwLj;
return name[algorithm-1]; X$uz=)
} C;)Xwm>e
@q{:Oc^
public static void sort(int[] data, int algorithm) { _!C)r*0(
impl[algorithm-1].sort(data); =hugnX<9
} B'KXQa-$O
ek(kY6x:
public static interface Sort { 9&XV}I,~?|
public void sort(int[] data); 7SA-OFM
} 7>t$<J
J:~[j
public static void swap(int[] data, int i, int j) { gf3u0' $
int temp = data; hk7(2j7B
data = data[j]; "u Of~e"
data[j] = temp; \~z?PA.$
} wcdW72
} $K6?(x_