[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; NUJ~YWO;
} 9<Eg}Ic
int i1=l; mdih-u(T|
int i2=mid+1; ITJ q
for(int cur=l;cur<=r;cur++){ !cW[G/W8
if(i1==mid+1) k_|^kdWJ
data[cur]=temp[i2++]; -cF'2Sfr
else if(i2>r) ~,6b_W p/
data[cur]=temp[i1++]; 5AeQQU
else if(temp[i1] data[cur]=temp[i1++]; [U =Uo*
else l.)}t)my}
data[cur]=temp[i2++]; o}Cq.[G4k
} -4#2/GXNO
} ^n.WZUk
ws/63d*
} EpPf_ \o
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改进后的归并排序: `b5 @}',
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package org.rut.util.algorithm.support; we7c`1E
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import org.rut.util.algorithm.SortUtil; 3:/'n
)vB2!H/
/** y %8op:'
* @author treeroot vEe NW
* @since 2006-2-2 9.O8/0w7LV
* @version 1.0 aT l c
*/ M[5[N{
public class ImprovedMergeSort implements SortUtil.Sort { xG&SX#[2
+#J,BKul
private static final int THRESHOLD = 10; \$*$='6"
t=euE{c
/* Kr`]_m
* (non-Javadoc) 4pU>x$3$
* D<{{ :7n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !G5a*8]
*/ ~|Y>:M+0Z
public void sort(int[] data) { &:B<Q$g#
int[] temp=new int[data.length]; B#%;Qc
mergeSort(data,temp,0,data.length-1); ._:nw=Y0<}
} g&/p*c_
%bXtKhg5eJ
private void mergeSort(int[] data, int[] temp, int l, int r) { Mn:/1eY
int i, j, k; 7cg*|E@
int mid = (l + r) / 2; 7sNw
if (l == r) 1YxgR}7
return; vC;]jJb:
if ((mid - l) >= THRESHOLD) 'BMy8
mergeSort(data, temp, l, mid); %WFu<^jm
else S*)1|~pRvQ
insertSort(data, l, mid - l + 1); n}-3o]ku
if ((r - mid) > THRESHOLD) Ok-.}q>\Mv
mergeSort(data, temp, mid + 1, r); ;(6g\'m
else >cmE t
insertSort(data, mid + 1, r - mid); 9?T{}| ?
^D67y%
for (i = l; i <= mid; i++) { BfTcI)
temp = data; /nx'Z0&+X
} *v%rMU7,
for (j = 1; j <= r - mid; j++) { L *[K>iW
temp[r - j + 1] = data[j + mid]; wRNroQ
} =dP{Gh
int a = temp[l]; ?ne_m:J[
int b = temp[r]; 2LY=DL7
for (i = l, j = r, k = l; k <= r; k++) { !{^\1QK
if (a < b) { O OFVnu
data[k] = temp[i++]; 9X<OJT;3J
a = temp; xom<P+M!|
} else { {1J&xoV"
data[k] = temp[j--]; a)-FGP^
b = temp[j]; w>?Un,K
} 7Ob*Yv=[
} u8zbYd3
} }}{!u0N},V
6"j_iB
/** {.e=qQ%P5)
* @param data "R #k~R
* @param l woH)0v
* @param i =/Aj
*/ %T`U^Pnr
private void insertSort(int[] data, int start, int len) { qUF'{K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )4Q?aMm
} o;F" {RZ
} a5'#j35
} |Yi)"-
} #:fQ.WWO
J<j&;:IRd
堆排序： T".]m7!
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package org.rut.util.algorithm.support; -7>)i
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import org.rut.util.algorithm.SortUtil; /Poet%XvRx
(3vHY`9
/** I XA>`D
* @author treeroot (n( fI f
* @since 2006-2-2 z;u> Yz+3
* @version 1.0 0CvsvUN@
*/ z T%U!jqI
public class HeapSort implements SortUtil.Sort{ yTM{|D]$(
F-Z%6O,2
/* (non-Javadoc) ?^HfNp9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OIb
*/ _K2?YY(#>
public void sort(int[] data) { "T/>d%O1b
MaxHeap h=new MaxHeap(); lw%?z/HDf
h.init(data); 8am`6;O:!
for(int i=0;i h.remove(); e>'H IO
System.arraycopy(h.queue,1,data,0,data.length); ^u)z{.z'H/
} qf'm=efRyu
uw\1b.r'B
private static class MaxHeap{ {WN(&eax
[ANuBNF
void init(int[] data){ 46jh-4)<
this.queue=new int[data.length+1]; RH)EB<PV
for(int i=0;i queue[++size]=data; s3s4OAY
fixUp(size); hi=XYC,
} ;_kzcK!l
} fCAiLkT,C[
}H:F< z*
private int size=0; z|R,&~:
w [>;a.$
private int[] queue; "pxzntY|
&YP#M|
public int get() { USJ-e
return queue[1]; DbX{#4lx
} {aKqXL[UP
z5\;OLJS,
public void remove() { `XTh1Z\
SortUtil.swap(queue,1,size--); Upl6:xYrG
fixDown(1); |rRO@18dA
} OY-w?'p?W
file://fixdown _Yb_D/
private void fixDown(int k) { ~0"p*?^
int j; N8cAqr
while ((j = k << 1) <= size) { 5}ie]/[|
if (j < size %26amp;%26amp; queue[j] j++; =iB,["s
if (queue[k]>queue[j]) file://不用交换 9D\4n
break; ~i'Nqe_
SortUtil.swap(queue,j,k); ;Z[]{SQ
k = j; V5}nOGV9
} V2Q$g^X'
} SD\= m/W
private void fixUp(int k) { /{2*WI;
while (k > 1) { t5k!W7C
int j = k >> 1; Myat{OF
if (queue[j]>queue[k]) dth&?/MERL
break; 5@Bu99`
SortUtil.swap(queue,j,k); ]36sZ *
k = j; ;.sl*q1A
} t,)N('m}=
} bZ_mYyBh
<<A`aU^fX
} Wx'Kp+9'
jo+w>
} |aQ"3d
EUYCcL'G
SortUtil： _:n b&B
Gm`}(;(A
package org.rut.util.algorithm; TOF '2&H
vh!v MB}}
import org.rut.util.algorithm.support.BubbleSort; wu<])&F
import org.rut.util.algorithm.support.HeapSort; Bc-yxjsw
import org.rut.util.algorithm.support.ImprovedMergeSort; bSwWszd~
import org.rut.util.algorithm.support.ImprovedQuickSort; ({0)@+V8
import org.rut.util.algorithm.support.InsertSort; v<\A%
import org.rut.util.algorithm.support.MergeSort; " }gVAAvc7
import org.rut.util.algorithm.support.QuickSort; q}uHFp/J
import org.rut.util.algorithm.support.SelectionSort; W_O)~u8
import org.rut.util.algorithm.support.ShellSort; +Z2MIC|Ud
3 vP(SIF
/** 5M]z5}n/
* @author treeroot {MAQ/5
* @since 2006-2-2 ;32#t[ib
* @version 1.0 Ax3W2s
*/ pb60R|k
public class SortUtil { /e\{
public final static int INSERT = 1; egR9AEJvz
public final static int BUBBLE = 2; 3XiO@jzre
public final static int SELECTION = 3; a>4uiFiv
public final static int SHELL = 4; 2g*J
public final static int QUICK = 5; I:(m aMc
public final static int IMPROVED_QUICK = 6; NW|f7 ItX
public final static int MERGE = 7; c9''
public final static int IMPROVED_MERGE = 8; I0AJY )R
public final static int HEAP = 9; Uv_N x10
PMsz`
public static void sort(int[] data) { XB hb`AG
sort(data, IMPROVED_QUICK); @Fv=u
} ){s*n=KIO
private static String[] name={ :Br5a34q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gsar[gZ
}; $$i.O}
~pk(L[G
private static Sort[] impl=new Sort[]{ Sydh2d
new InsertSort(), :vx$vZb
new BubbleSort(), mAgF73,3
new SelectionSort(), J`M&{UP
new ShellSort(), |XYEn7^r
new QuickSort(), JN/UUfj
new ImprovedQuickSort(), ?q`0ZuAg\<
new MergeSort(), \2[<XG(^
new ImprovedMergeSort(), TG48%L
new HeapSort() m4K* <
}; "\"DCDKmG
Eu}b8c
public static String toString(int algorithm){ ~Vh(6q.oT
return name[algorithm-1]; .Hhhi
} pN6%&@) =
x"kjs.d7[<
public static void sort(int[] data, int algorithm) { J;t 7&Zpe
impl[algorithm-1].sort(data); v1U?&C
} )/ Ud^wi
rr`;W}3
public static interface Sort { d|9b~_::V
public void sort(int[] data); PW(\4Q\
} rjt8fN
;?fS(Vz~
public static void swap(int[] data, int i, int j) { .@)mxC:\K9
int temp = data; lA!"z~03*
data = data[j]; 5cr(S~Q;
data[j] = temp; 9L0GLmLk1u
} 4rK{-jvh>m
} D(W,yq~7uY