[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; O7-mT8o
} CUBEW~X}M
int i1=l; T?tgdJ
int i2=mid+1; !Sh&3uy_qN
for(int cur=l;cur<=r;cur++){ Eg#K.5hJ
if(i1==mid+1) 4U+xb>
data[cur]=temp[i2++]; ZojIR\F^
else if(i2>r) "4+&-ms
data[cur]=temp[i1++]; "/3'XOK|
else if(temp[i1] data[cur]=temp[i1++]; @s ?
else l1OE!W W
data[cur]=temp[i2++]; 5 ZGNz1)?V
} jjw`Dto&
} }@'$b<!B
]6(N@RC
} .f%fHj
K1"*.\?F
改进后的归并排序: V3Q+s8OIF
bMg(B-uF7
package org.rut.util.algorithm.support; Ui_8)z _
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import org.rut.util.algorithm.SortUtil; eTI%^d|
aQ?/%\>
/** \r^qL^
* @author treeroot }Gz~nf%
* @since 2006-2-2 B}Z63|/N
* @version 1.0 MDhRR*CBh
*/ |:q=T ~x
public class ImprovedMergeSort implements SortUtil.Sort { v7BA[jQr
D[aCsaR
private static final int THRESHOLD = 10; }Z@ovsG
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/* ~dgDO:)
* (non-Javadoc) ?I_s0k I
* QdH\LL^8R4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eL10Q(;P`
*/ Xx."$l
public void sort(int[] data) { :DrWq{4
int[] temp=new int[data.length]; `w#Oih!6A|
mergeSort(data,temp,0,data.length-1); v5!d$Vctu
} Y!~49<;
^ =bu(L
private void mergeSort(int[] data, int[] temp, int l, int r) { Z&Pg"a?\
int i, j, k; m4hX 'F
int mid = (l + r) / 2; E4`N-3
if (l == r) ]/[FR5>
return; m[?E
if ((mid - l) >= THRESHOLD) |oH,
mergeSort(data, temp, l, mid); #%a;"w
else D.B.7-_8
insertSort(data, l, mid - l + 1); s@&`f{
if ((r - mid) > THRESHOLD) gf#{k2r
mergeSort(data, temp, mid + 1, r); fxgPhnaC>
else b#uL?f
insertSort(data, mid + 1, r - mid); @| M|+k3
@Lpq~ 1eZB
for (i = l; i <= mid; i++) { \\PjKAsh
temp = data; $UMFNjL
} Ygm`ZA y
for (j = 1; j <= r - mid; j++) { eJF5n#
temp[r - j + 1] = data[j + mid]; 8p^bD}lN7
} Y>|B;Kj0(
int a = temp[l]; l4D+Y
int b = temp[r]; ?{P"O!I{
for (i = l, j = r, k = l; k <= r; k++) { @TLS<~
if (a < b) { QwNly4
data[k] = temp[i++]; !O+)sbd<
a = temp; mq aHwID
} else { rHC>z7+z.
data[k] = temp[j--]; )M,OfXa
b = temp[j]; c(3~0Yr
} &oP+$;Y
} 3EV;LH L
} k$R~R-'
~Sg5:T3
/** b*;Si7-
* @param data 9oyE$S h]
* @param l 04LI]'
* @param i <{dVKf,e
*/ r@72|:,
private void insertSort(int[] data, int start, int len) { "Q}#^h]F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ttu2skcv
} p#ol*m5wE
} A_XY'z1
} mC4zactv
} e}D3d=6`
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堆排序： K,Ef9c/+K
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package org.rut.util.algorithm.support; I?h)OvWd
!^^?dRd*v
import org.rut.util.algorithm.SortUtil; ;;_,~pI?k
eV2W{vuI
/** #+:9T/*>0
* @author treeroot %}SGl${-
* @since 2006-2-2 0ZT5bg_M
* @version 1.0 MuYk};f
*/ ;+e}aER&9
public class HeapSort implements SortUtil.Sort{ O!mvJD
5QW=&zI`=
/* (non-Javadoc) `_BNy=`s*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j>*R]mr6
*/ k52/w)Ro,$
public void sort(int[] data) { )bS~1n_0
MaxHeap h=new MaxHeap(); @GBxL*e
h.init(data); Sc>,lIM
for(int i=0;i h.remove(); S'|,oUWDb
System.arraycopy(h.queue,1,data,0,data.length); "9m2/D`=
} ^WHE$4U`
o>).Cj
private static class MaxHeap{ @E;=*9ek{u
Q}1 R5@7
void init(int[] data){ [=E
this.queue=new int[data.length+1]; &R[ Mc-2
for(int i=0;i queue[++size]=data; -d~4A
fixUp(size); FK:;e lZ
} dU6ou'pf
} ,p4&g)o
2"0es40;0
private int size=0; K0H'4' I
n)L*
private int[] queue; bt"W(m&f
Ov};e
public int get() { I~q#eO)
return queue[1]; "8c@sHk(w
} %@wJ`F2a_
)2pbpbWX>
public void remove() { $LKIT0
SortUtil.swap(queue,1,size--); t0/p]=+.p/
fixDown(1); b1^vd@(lx
} JI?rL
file://fixdown ^M3~^lV
private void fixDown(int k) { DQNnNsP:M-
int j; NV)!7~r}:
while ((j = k << 1) <= size) { 1QqYQafA
if (j < size %26amp;%26amp; queue[j] j++; ZRv*!n(Ug<
if (queue[k]>queue[j]) file://不用交换 TMAJb+@l:
break; ST2.:v;lb
SortUtil.swap(queue,j,k); k>F'ypm
k = j; Ao&\EcIOT
} m#8m] Y
} 1q~+E\x
private void fixUp(int k) { FqkDKTS\&
while (k > 1) { K\>tA)IPSV
int j = k >> 1; {s)+R[?m<o
if (queue[j]>queue[k]) p`mS[bxv!
break; l/BLUl~z
SortUtil.swap(queue,j,k); fXXr+Mor
k = j; !zuxz
} 3b*cU}go
} \X<bH&x:z
5j:0Yt
} guX 9}
W!%]_I!&K
} wQv'8A_}
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SortUtil： JCz@s~f\y
2]I4M[|&z
package org.rut.util.algorithm; @_U;9)
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import org.rut.util.algorithm.support.BubbleSort; WF2}-NU"
import org.rut.util.algorithm.support.HeapSort; qgE 73.!`6
import org.rut.util.algorithm.support.ImprovedMergeSort; ^=C{.{n
import org.rut.util.algorithm.support.ImprovedQuickSort; cYFiJJLG]
import org.rut.util.algorithm.support.InsertSort; ;E@G`=0St
import org.rut.util.algorithm.support.MergeSort; (2$( ?-M
import org.rut.util.algorithm.support.QuickSort; t/ +=|*
import org.rut.util.algorithm.support.SelectionSort; Ae mDJ8Y
import org.rut.util.algorithm.support.ShellSort; =fu :@+
E8>Rui@9
/** 2}YOcnB
* @author treeroot q/4YS0CqE
* @since 2006-2-2 UH]l9Aq$P
* @version 1.0 ([ jF4/
*/ I'PeN0T f
public class SortUtil { +cIUGFp}
public final static int INSERT = 1; %TX@I$Ba
public final static int BUBBLE = 2; 5:O-tgig.
public final static int SELECTION = 3; D<|qaHB=
public final static int SHELL = 4; _8"O$w
public final static int QUICK = 5; "[vu6`m?
public final static int IMPROVED_QUICK = 6; >"gf3rioW
public final static int MERGE = 7; N*%@
public final static int IMPROVED_MERGE = 8; QF{4/y^j{
public final static int HEAP = 9; }-ftyl7
|o,8V p
public static void sort(int[] data) { vLR~'"`F
sort(data, IMPROVED_QUICK); ?dD&p8{
} x;-. ZVF
private static String[] name={ jZh';M8"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "J+3w
}; _$= _du
(:._"jp]
private static Sort[] impl=new Sort[]{ .{44a$)
new InsertSort(), ,stN
new BubbleSort(), Qi_>Mg`x
new SelectionSort(), U Z.=aQ}M
new ShellSort(), (rkyWz
new QuickSort(), O<96/a'
new ImprovedQuickSort(), *:>"q ej
new MergeSort(), mocI&=EF2X
new ImprovedMergeSort(), D@.tkzU@E
new HeapSort() 7h6,c/<
}; VUVaaOmO
Ynp{u`?
public static String toString(int algorithm){ 4Fp0ZVT
return name[algorithm-1]; &C_'p{G
} AFc$%\s4
0TN;86Mo
public static void sort(int[] data, int algorithm) { p[<Dk$7K
impl[algorithm-1].sort(data); QFg sq{
} 6:q"l\n>
h.-@ F
public static interface Sort { ~.A)bp
public void sort(int[] data); 5O~HWBX.
} 4AG\[f 8q
43={Xy
public static void swap(int[] data, int i, int j) { T^T[$26
int temp = data; Y|8:;u'
data = data[j]; BhM'@g*
data[j] = temp; .mDM[e@'
} /I)yU>o
} Q2zjZC*'%