[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[Jqf
} ]|sAK%/
int i1=l; nv0]05.4
int i2=mid+1; t`+'r}=d
for(int cur=l;cur<=r;cur++){ h}]fnA
if(i1==mid+1) ~M\I;8ne
data[cur]=temp[i2++]; 7DIIx}A
else if(i2>r) jLpc Zb,
data[cur]=temp[i1++]; de>v
else if(temp[i1] data[cur]=temp[i1++]; "R3d+p
else kI:}| _
data[cur]=temp[i2++]; qQ0cJIISb\
} \mV'mZ9>
} 4E+hRKuo,
Op>%?W8/UF
} *P#WDXRwd
Tp0bS
改进后的归并排序: 5cEcTJL[C
Y_]De3:V0B
package org.rut.util.algorithm.support; 1!.(4gV
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import org.rut.util.algorithm.SortUtil; +e-G,%>9
JqMDqPIQ
/** %zSuK8kxV
* @author treeroot fwBRWr9
* @since 2006-2-2 OX"j#
* @version 1.0 ;\[(- )f!=
*/ y|Ir._bt
public class ImprovedMergeSort implements SortUtil.Sort { 1c;6xc,ub
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private static final int THRESHOLD = 10; &[At`Nw71
1?| flK
/* 0 s70r
* (non-Javadoc) 2hee./F`
* wN2QK6Oc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O)Y?=G)
*/ gt/zpiKmV
public void sort(int[] data) { ;L,mBQB?0b
int[] temp=new int[data.length]; fPrLM'
mergeSort(data,temp,0,data.length-1); [p2H=
} MNg^]tpf
~j-cS J3
private void mergeSort(int[] data, int[] temp, int l, int r) { #Jna6
int i, j, k; HmZ{L +"
int mid = (l + r) / 2; uio@r^Xz
if (l == r) KL ?@@7
return; :Dd$i_3=
if ((mid - l) >= THRESHOLD) TARXx>
mergeSort(data, temp, l, mid); (%U@3._
else E"L2&.
insertSort(data, l, mid - l + 1); Z(9u<
if ((r - mid) > THRESHOLD) 8HZs>l
mergeSort(data, temp, mid + 1, r); lhi_6&&[8
else fPR$kch
insertSort(data, mid + 1, r - mid); ]q6;#EUr?
Uz7^1.-g4
for (i = l; i <= mid; i++) { 4<x'ocKlD
temp = data; /'hCi]b@v
} \T;\XAGr
for (j = 1; j <= r - mid; j++) { HXoX
temp[r - j + 1] = data[j + mid]; b]7GmRekl
} /RyR>G!
int a = temp[l]; ?h0X,fl3
int b = temp[r]; $-&BB(-{E&
for (i = l, j = r, k = l; k <= r; k++) { A"aV'~>
if (a < b) { Dk='+\
data[k] = temp[i++]; sO5?aB&
a = temp; J-ePE7i
} else { o=RM-tR`v
data[k] = temp[j--]; T2D<UhP
b = temp[j]; w ~dk#=
} .)+hH y
} ZlHDi!T
} 0Hs|*:Y1D
S=xA[%5
/** XUF\r]B,9
* @param data ^0#;YOk
* @param l z`Hy'{1
* @param i k@ K7yK
*/ 3b YCOqG
private void insertSort(int[] data, int start, int len) { ~Aq5XI%i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 720)VzT
} Pub0IIs
} 87WBM;$&s
} m{7^EF
} yi^b)2G
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堆排序： r|*&GHo L
ql GW.jY.
package org.rut.util.algorithm.support; jAh2N3)
1.D-FPK
import org.rut.util.algorithm.SortUtil; N-g8}03
?DH"V7bs
/** '&99?s`u
* @author treeroot f""`cdqAOh
* @since 2006-2-2 kSc{^-<R
* @version 1.0 ^ZM0c>ev=l
*/ 2S8P}$mM
public class HeapSort implements SortUtil.Sort{ O,<IGO
O'GG Ti]e
/* (non-Javadoc) vfB2XVc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KvQ,;A
*/ CAT.4GM
public void sort(int[] data) { !vn1v)6
MaxHeap h=new MaxHeap(); ^VT1vu %03
h.init(data); @h?shW=^
for(int i=0;i h.remove(); "C?5f]T
System.arraycopy(h.queue,1,data,0,data.length); F/1#l@qN
} + <c^=&7Lq
s!+"yK
private static class MaxHeap{ 4Iq'/r
z5*=MlZ)R.
void init(int[] data){ jEz+1Nl)
this.queue=new int[data.length+1]; @=5qT]%U3J
for(int i=0;i queue[++size]=data; :y2p@#l#
fixUp(size); L&-hXGx=7
} $hR)i
} =TP( UJ
D^U: ih
private int size=0; 7B3w\
#&8}<8V
private int[] queue; L0%hnA@
39 Y(!q
public int get() { @>x pYV
return queue[1]; zNSu
} -;;Z 'NM;8
i{^Z1;Yl
public void remove() { ^O^:$nXhYy
SortUtil.swap(queue,1,size--); h5kPn~
fixDown(1); /$"[k2 N
} INSkgOo
file://fixdown Y`6rEA0
private void fixDown(int k) { L?Yoh<
int j; N:VX!w
while ((j = k << 1) <= size) { W YW|P2*
if (j < size %26amp;%26amp; queue[j] j++; o$.e^XL
if (queue[k]>queue[j]) file://不用交换 x\s,= n3z
break; pWE`x|J
SortUtil.swap(queue,j,k); 6O2=Ns;J6
k = j; 7:NmCpgL!
} z5Qs@dG
} ]+DI.%
private void fixUp(int k) { 4*Z6}"
while (k > 1) { uqyB5V0gh
int j = k >> 1; "k$JP
if (queue[j]>queue[k]) d h^^G^
break; $!A:5jech
SortUtil.swap(queue,j,k); f]8I64
k = j; ]J2:194
} lo&#(L+2
} Gi^Ha=?J%
.wrL3z_
} $\a5&1rl
T:asm1BC[
} MVv1.6c7Y
{}>n{_
SortUtil： pN[0YmY#
IO.<q,pP!_
package org.rut.util.algorithm; o**yZ2
Wx)K*9
import org.rut.util.algorithm.support.BubbleSort; 4YU/uQm
import org.rut.util.algorithm.support.HeapSort; sTHq&(hLUG
import org.rut.util.algorithm.support.ImprovedMergeSort; o=fgin/E\
import org.rut.util.algorithm.support.ImprovedQuickSort; ;%q39U}
import org.rut.util.algorithm.support.InsertSort; Bz2'=~J
import org.rut.util.algorithm.support.MergeSort; %1McD{
import org.rut.util.algorithm.support.QuickSort; ts9pM~_~
import org.rut.util.algorithm.support.SelectionSort; +UWU|:
import org.rut.util.algorithm.support.ShellSort; BRG|Asg(
Ek.&Sf$cd'
/** B`#h{)[
* @author treeroot $<)Yyi>6E
* @since 2006-2-2 ekf$dgoR
* @version 1.0 }ublR&zlp
*/ Y^ve:Z
public class SortUtil { K%KZO`gO
public final static int INSERT = 1; 10sK]XI
public final static int BUBBLE = 2; }ZZ5].-a<D
public final static int SELECTION = 3; (d2@Mz
public final static int SHELL = 4; q$ghLGz
public final static int QUICK = 5; ES:!Vx9t0|
public final static int IMPROVED_QUICK = 6; ;@4H5p
public final static int MERGE = 7; &$fbP5uAZ
public final static int IMPROVED_MERGE = 8; j,%EW+j$
public final static int HEAP = 9; T*q"N?/4
!#D=w$@r:
public static void sort(int[] data) { bNzqls$
sort(data, IMPROVED_QUICK); }3/~x
} J>S3sP
private static String[] name={ *ftC_v@p5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9|:^k.
}; X.|Ygx
v1[_}N9f>H
private static Sort[] impl=new Sort[]{ 0^!Gib
new InsertSort(), hY\{|
new BubbleSort(), p_terD:
new SelectionSort(), dXu{p
new ShellSort(), CVKnTEs
new QuickSort(), E%k7wM {
new ImprovedQuickSort(), a,Kky^B
new MergeSort(), j=sBq.S
new ImprovedMergeSort(), )GB`*M[
new HeapSort() 1IA5.@G:
}; &,W$-[
(7q^FtjA#
public static String toString(int algorithm){ ,I*X)(
return name[algorithm-1]; m^Lj+=Z"
} I ,FqN}
M?6;|-HH
public static void sort(int[] data, int algorithm) { x(r+P9f\<
impl[algorithm-1].sort(data); cz.3|Lby
} 5h_5Z~
6nw&$I
public static interface Sort { ,a(O`##Bn
public void sort(int[] data); Wpm9`K
} H*!5e0~rR
N7. @FK
public static void swap(int[] data, int i, int j) { ;lfWuU%R
int temp = data; 0o/B{|rv
data = data[j]; [QEwK|!L
data[j] = temp; EnCU4CU`
} t3F?>G#y
} nmE5]Pcg