[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; I'2:>44>I6
} =A={Dpv[>
int i1=l; C`+g:qT
int i2=mid+1; XIh2Y\33ys
for(int cur=l;cur<=r;cur++){ vn|u&}h
if(i1==mid+1) OLUQjvnU
data[cur]=temp[i2++]; Yr5A,-s
else if(i2>r) Z.Lm[$/edn
data[cur]=temp[i1++]; 1RM;"b/
else if(temp[i1] data[cur]=temp[i1++]; s,m+q)
else Yq}7x1mm
data[cur]=temp[i2++]; [H;HrwM s)
} JIvVbI
} QLH&WF
s^ rO I~
} Nv "R'Pps
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改进后的归并排序: aSd$;t~
1MHP#X;|
package org.rut.util.algorithm.support; m6^Ua
@*q WV*$h
import org.rut.util.algorithm.SortUtil; v'Ce|.;
*F*c
/** D5fJuT-bp
* @author treeroot W/ZmG]sZE
* @since 2006-2-2 H=])o21
* @version 1.0 !R;P"%PHV
*/ '#$Y:/
public class ImprovedMergeSort implements SortUtil.Sort { B!GpD@U
r@FdxsCnGM
private static final int THRESHOLD = 10; LSb3w/3M
pw{3I 2Ix
/* L0uvRge
* (non-Javadoc) xEQ2iCeC
* txQyHQ)@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H .)}|
*/ EQ`;=I3J9y
public void sort(int[] data) { kf\n
int[] temp=new int[data.length]; wVkms
mergeSort(data,temp,0,data.length-1); K y~ 9's
} UgDai?b1
H|;6K`O_
private void mergeSort(int[] data, int[] temp, int l, int r) { 9\i;zpN\
int i, j, k; q"ba~@<BEl
int mid = (l + r) / 2; KK4>8zGR
if (l == r) 2Fi>nJ
return; 0/hX3h
if ((mid - l) >= THRESHOLD) *I%r
mergeSort(data, temp, l, mid); jC+>^=J(
else (1JZuR<?c
insertSort(data, l, mid - l + 1); mE)65@3%
if ((r - mid) > THRESHOLD) %Q5D#d"p`
mergeSort(data, temp, mid + 1, r); uXq?Z@af|f
else {`QF(WL
insertSort(data, mid + 1, r - mid); ^Dhj<_
d,[.=Jqv[
for (i = l; i <= mid; i++) { ^-{ 1]G:
temp = data; hPr*<2mp
} zrk/}b0j
for (j = 1; j <= r - mid; j++) { ^4(CO[|c~
temp[r - j + 1] = data[j + mid]; 6i[\?7O'0
} QT{$2 7;
int a = temp[l]; VaC#9Tp2X
int b = temp[r]; "wL~E Si
for (i = l, j = r, k = l; k <= r; k++) { o/buU{)y
if (a < b) { zOYkkQE3mJ
data[k] = temp[i++]; S+>&O3m
a = temp; `%;nHQ"
} else { :,rD5aOQ
data[k] = temp[j--]; 4 q}1
b = temp[j]; 1<A+.W
} k$:QpTg[
} f^](D'L?D
} WS9n.opl}
Ug^C}".&
/** !+& NG&1
* @param data GDw4=0u-
* @param l o_/C9[:
* @param i zYpIG8"o5
*/ o O%!P<D
private void insertSort(int[] data, int start, int len) { G&:[G>iSm^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }hyK/QUCoN
} ac>}$Uw)
} b0X*+q
} y2>v'%]2
} T~8`{^
AbUU#C7
堆排序： ]Vhhx`0
+JZ<9,4
package org.rut.util.algorithm.support; G?\o_)IJ
;d G.oUk=
import org.rut.util.algorithm.SortUtil; $>v^%E;Y4
q_>DX,A
/** j>gO]*BX~
* @author treeroot T'i9_V{
* @since 2006-2-2 toPA@V
* @version 1.0 hor ok:{
*/ Djx9TBZ5
public class HeapSort implements SortUtil.Sort{ OP |{R7uC
u~<>jAy
/* (non-Javadoc) X0b :Oiw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3Zg=ZnF
*/ S;NChu?8
public void sort(int[] data) { WhE5u&`
MaxHeap h=new MaxHeap(); OzBo*X/p
h.init(data); QNFA#`H
for(int i=0;i h.remove(); KQi9qj
System.arraycopy(h.queue,1,data,0,data.length); C yC<{D+
} ^q"p8
[ /*$?PXt
private static class MaxHeap{ ({D.oS
.6!]RA5!=
void init(int[] data){ J&^r}6D
this.queue=new int[data.length+1]; 1w+OnJI?
for(int i=0;i queue[++size]=data; JeMhiY}
fixUp(size); GW'=/ z7
} c}Jy'F7&f
} V)R-w`
GK/a^[f+'l
private int size=0; o]n5pZ\\W<
,8o]XFOr
private int[] queue; v3S{dX<
25ul,t_Du
public int get() { s .^9;%@$J
return queue[1]; lO%Z4V_Mj
} n$y1kD
BdUhFN*
public void remove() { <| |Lj
SortUtil.swap(queue,1,size--); E1 *\)q
fixDown(1); &gF{<$$
} S)VuT0
file://fixdown 5gF}7D@
private void fixDown(int k) { JC{}iG6r+
int j; kSU*d/}*u
while ((j = k << 1) <= size) { [KWF7GQi
if (j < size %26amp;%26amp; queue[j] j++; mfG|K@ODM-
if (queue[k]>queue[j]) file://不用交换 pSQ3SM
break; <WaiJy?
SortUtil.swap(queue,j,k); PZLWyp
k = j; ] 5P{*
} i/O!bq[o
} v{H23Cfh:
private void fixUp(int k) { i2)SSQ
while (k > 1) { XT>e/x9'
int j = k >> 1; C'n 9n!hR
if (queue[j]>queue[k]) N$Gx$u3Cd
break; a6WE,4T9
SortUtil.swap(queue,j,k); 6e |
k = j; Aplqxvth
} RfN5X}&A
} 'ZT!a]4
dq:M!F
} Btpx[T
q,u>`]}
} Uj k``;
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SortUtil： 2yq.<Wz<
2:pq|eiF
package org.rut.util.algorithm; DLS-WL
pe,c
import org.rut.util.algorithm.support.BubbleSort; dmlh;Z
import org.rut.util.algorithm.support.HeapSort; fbw{)SZ
import org.rut.util.algorithm.support.ImprovedMergeSort; [n74&EH
import org.rut.util.algorithm.support.ImprovedQuickSort; ]-x#zp;=
import org.rut.util.algorithm.support.InsertSort; \vQ_:-A
import org.rut.util.algorithm.support.MergeSort; ;i:Uoyi
import org.rut.util.algorithm.support.QuickSort; (Egykh>
import org.rut.util.algorithm.support.SelectionSort; /6gRoQ%j
import org.rut.util.algorithm.support.ShellSort; Om}&`AP};
7Fy^K;V"
/** D>G&aQ
* @author treeroot _rs#h)
* @since 2006-2-2 F,:F9r?l,H
* @version 1.0 zztW7MG2lQ
*/ GrM~%ng
public class SortUtil { aOYd"S}u
public final static int INSERT = 1; }O1F.5I1
public final static int BUBBLE = 2; r`<evwIe
public final static int SELECTION = 3; lq.0?(
public final static int SHELL = 4; pQVi&(M
public final static int QUICK = 5; WM@uxe,
public final static int IMPROVED_QUICK = 6; <wE2ly&x
public final static int MERGE = 7; oR-_=U^
public final static int IMPROVED_MERGE = 8; t9K.Jc0
public final static int HEAP = 9; zv0RrF^
2tWUBt\,g
public static void sort(int[] data) { (O`=$e
sort(data, IMPROVED_QUICK); +IS$Un
} r<|\4zIo/
private static String[] name={ >F-J}P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dk(-yv'
}; }U^9(
[MiD%FfcNH
private static Sort[] impl=new Sort[]{ ZgXh[UHQy
new InsertSort(), H}U&=w'
new BubbleSort(), |LNXu
new SelectionSort(), l^Lg"m2
new ShellSort(), ]iz5VI@
new QuickSort(), AOWI`
new ImprovedQuickSort(), t?0=;.D
new MergeSort(), Nc"h8p?
new ImprovedMergeSort(), uO^{+=;A=
new HeapSort() _K;rM7
}; 3c9[FZ@ya
j|[s?YJl
public static String toString(int algorithm){ zJ9,iJyuD
return name[algorithm-1]; U| N`X54
} 6B+ @76wH
e<C5}#wt
public static void sort(int[] data, int algorithm) { /FYa{.Vlr
impl[algorithm-1].sort(data); qp{NRNkQ
} ;3?M?E/$s
a"&Z!A:Z=
public static interface Sort { 17 j7j@s)
public void sort(int[] data); ]&r/H17
} 6u.b?_u
d3{Zhn@
public static void swap(int[] data, int i, int j) { be764do
int temp = data; "QlCcH`g
data = data[j]; u!@P,,NY
data[j] = temp; D8dTw{C
} C#r`oZS1
} J]~fv9~P