[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; ~h85BF5
} (#RHB`h5
int i1=l; gSUcx9f]
int i2=mid+1; Y M\ K%rk
for(int cur=l;cur<=r;cur++){ zhRB,1iG
if(i1==mid+1) 8a'.ZdqC?
data[cur]=temp[i2++]; ( _)jkI \
else if(i2>r) J|bd)0
data[cur]=temp[i1++]; S(8$S])0
else if(temp[i1] data[cur]=temp[i1++]; a$"Hvrj
else R:k5QD9/&p
data[cur]=temp[i2++]; N@1+O,o
} oxkoA
} 1Y@Aixx
Qqvihd
} TQ*1L:X7M&
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改进后的归并排序: 48qV>Gwf
&c:Ad% z
package org.rut.util.algorithm.support; #( jw!d&
,5,!es@`b
import org.rut.util.algorithm.SortUtil; E}p&2P+MR
;1.,Sn+zO
/** _Khc3Jo
* @author treeroot Z99>5\k
* @since 2006-2-2 D.Q=]jOs
* @version 1.0 M#VE]J
*/ /ZPyN<@
public class ImprovedMergeSort implements SortUtil.Sort { `~Zs0
$yYO_ZBiy
private static final int THRESHOLD = 10; "C SC
B$!)YD;
/* V'T ,4
* (non-Javadoc) 7=WT69,&
* (>GK\=:<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `[)YEgs
*/ %i-c0|,T4
public void sort(int[] data) { _m'Fr 7
int[] temp=new int[data.length]; r{ef.^&:
mergeSort(data,temp,0,data.length-1); ReI/]#Us
} Hp|_6hO 2
sq[iY
private void mergeSort(int[] data, int[] temp, int l, int r) { x`mN U
int i, j, k; {{MRELipW
int mid = (l + r) / 2; DRgTe&+
if (l == r) ul2")HL];
return; &twf,8
if ((mid - l) >= THRESHOLD) PGBQn#c<
mergeSort(data, temp, l, mid); ;YX4:OBqr
else }'/`2!lY
insertSort(data, l, mid - l + 1); k"]dK,,
if ((r - mid) > THRESHOLD) _/!y)&4"
mergeSort(data, temp, mid + 1, r); ;z:UN}
else \":m!K;Z
insertSort(data, mid + 1, r - mid); &8_gRP
A"D,Kg S
for (i = l; i <= mid; i++) { b7tOo7aH)
temp = data; : b~6i%b
} U1RpLkibQ
for (j = 1; j <= r - mid; j++) { QxOjOKAG
temp[r - j + 1] = data[j + mid]; rKf-+6Na
} yA(K=?sq
int a = temp[l]; B'EKM)dA
int b = temp[r]; 7`8Ik`lY
for (i = l, j = r, k = l; k <= r; k++) { BT"42#7_
if (a < b) { aKuSd3E@#
data[k] = temp[i++]; h{p=WWK
a = temp; >ByXB!Wi+
} else { aZ'Lx:)R
data[k] = temp[j--]; p2udm!)J
b = temp[j]; y+6o{`0
} pg%aI,
} )>-ibf`#?
} K7Wk6Aw
G\r?f&
/** H& Ca`B
* @param data a|=x5`h04~
* @param l `poE6\
* @param i LLXVNO@e+
*/ P2'DD 3
private void insertSort(int[] data, int start, int len) { !0C^TCuG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e0@Y#7N62
} .?e\I`Kk^'
} ,NVsn
} e `,ds~
} F^LZeF[#t
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堆排序： c#]q^L\x
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package org.rut.util.algorithm.support; h!:~f-@j4
yK2^Y]Ku?
import org.rut.util.algorithm.SortUtil; S"k*6U
e-*.Ca
/** ^=SD9V
* @author treeroot 5-0{+R5v
* @since 2006-2-2 9*=W-v
* @version 1.0 e|D;OM
*/ mL`5uf
public class HeapSort implements SortUtil.Sort{ Eb>78k(3I)
(S`2[.j
/* (non-Javadoc) mzc 4/<th
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `o?Ph&p}
*/ r~nsN*t
public void sort(int[] data) { VZ](uFBY
MaxHeap h=new MaxHeap(); 1`9xIm*9w
h.init(data); !i%"7tQ3$
for(int i=0;i h.remove(); zyg }F
System.arraycopy(h.queue,1,data,0,data.length); e^Ky<*Y
} z)=+ F]
XNb ZNaAd
private static class MaxHeap{ F.=Bnw/-
RxN,^!OV
void init(int[] data){ SdwS= (e6
this.queue=new int[data.length+1]; b-*3 2Y%
for(int i=0;i queue[++size]=data; ^ Dt#$Z
fixUp(size); lmSo8/%T
} =)` p_W
} t2iv(swTe
~~,rp) )
private int size=0; yxq}QSb \3
`VL}.h
private int[] queue; STw#lU) %(
(q7 Ry4-
public int get() { \7 NpT}dj
return queue[1]; U(;&(W"M
} aCxE5$~$
LtKI3ou
public void remove() { \y{Tn@7
SortUtil.swap(queue,1,size--); T=:]]nf?M
fixDown(1); )Cw`"n
} ;kJA'|GX
file://fixdown g@Qgxsyk>
private void fixDown(int k) { b(I2m
int j; PeE/iZ.
while ((j = k << 1) <= size) { 2kUxD8BcN
if (j < size %26amp;%26amp; queue[j] j++; iTg;7~1pY
if (queue[k]>queue[j]) file://不用交换 @b3#X@e}
break; A &9(mB
SortUtil.swap(queue,j,k); okFvn;
k = j; T'aec]u
} @(i!YL
} {?}*1,I
private void fixUp(int k) { A?T<",bO
while (k > 1) { FsGlJ
int j = k >> 1; 9A7@ 5F
if (queue[j]>queue[k]) "h7tnMS
break; ) (Tom9^
SortUtil.swap(queue,j,k); H<G4O02i_
k = j; S"hTE7`
} kY&h~Q
} =@5x"MOz
Iu35#j
} E|$Oha[
vHE^"l5v
} K!mOr
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SortUtil： J!*/a'Cv
'XUKN/.
package org.rut.util.algorithm; ,xT?mt}P
e%>b+Sv
import org.rut.util.algorithm.support.BubbleSort; A[YpcG'9
import org.rut.util.algorithm.support.HeapSort; l@hjP1o
import org.rut.util.algorithm.support.ImprovedMergeSort; @&hnL9D8lL
import org.rut.util.algorithm.support.ImprovedQuickSort; ;|cTHGxbE
import org.rut.util.algorithm.support.InsertSort; rBN)a"
import org.rut.util.algorithm.support.MergeSort; Wi}FY }f
import org.rut.util.algorithm.support.QuickSort; 9cv]y#
import org.rut.util.algorithm.support.SelectionSort; TV}}dw
import org.rut.util.algorithm.support.ShellSort; h`}3h< 8
m%8qZzqk
/** DBs*Fx[
* @author treeroot 1]T`n/d V
* @since 2006-2-2 2qO3XI
* @version 1.0 S-nlr@w8
*/ :9|W#d{o
public class SortUtil { j` /&r*zNq
public final static int INSERT = 1; [;b=A
public final static int BUBBLE = 2; kV Rn`n0
public final static int SELECTION = 3; *}):<nB$^
public final static int SHELL = 4; OW(&s,|6x
public final static int QUICK = 5; Ih[+K#t+E
public final static int IMPROVED_QUICK = 6; +"g~"<
public final static int MERGE = 7; :;!\vfZbU
public final static int IMPROVED_MERGE = 8; #DkD!dW(l
public final static int HEAP = 9; ;bX4(CMe &
H2-28XGc
public static void sort(int[] data) { @lUlY2
sort(data, IMPROVED_QUICK); 3v!~cC~cI
} ehAu^^Q>
private static String[] name={ HZ*0QgW\(5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SgE/!+{
}; =BZ?-mIU
(HN4g;{
private static Sort[] impl=new Sort[]{ k,Zm GllQ]
new InsertSort(), bO/*2oau
new BubbleSort(), ,goBq3[%?
new SelectionSort(), &(xUhX T
new ShellSort(), C+MSVc
new QuickSort(), XDD<oo
new ImprovedQuickSort(), wp.TfKxw
new MergeSort(), G;oFTP>o
new ImprovedMergeSort(), ]PNowS\
new HeapSort() qsg>5E
}; !)Rr] ~
[Id}4[={e
public static String toString(int algorithm){ IGAzE(
return name[algorithm-1]; 4o9$bv
} O:.,+,BH
T_OF7?
public static void sort(int[] data, int algorithm) { rFL$QC2
impl[algorithm-1].sort(data); 396R$\q
} 5GAy "Xd
Z]:BYX'
public static interface Sort { u&TdWZe
public void sort(int[] data); $X+u={]
} u:`y]
g3?U#7i
public static void swap(int[] data, int i, int j) { ?4)v`*
int temp = data; r[Zq3
data = data[j]; q?~Rnv
data[j] = temp; ZcryAm:I
} /axTh
} QlW=_Ymv{