[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; @v#]+9F
} zA~aiX
int i1=l; MJ=(rp=YU9
int i2=mid+1; jD`p;#~8
for(int cur=l;cur<=r;cur++){ kp{q5J6/
if(i1==mid+1) ;tBc&LJ?
data[cur]=temp[i2++]; Lrr1) h
else if(i2>r) {^Y0kvnd
data[cur]=temp[i1++]; *!~jHy8F
else if(temp[i1] data[cur]=temp[i1++]; O&]P u5
else #RJFJb/
data[cur]=temp[i2++]; 4axc05
} 7U@;X~c
} U_X/
w7(jSPB
} P?.j wI
lY.{v]i }
改进后的归并排序: c]u^0X?&
"JH /ODm
package org.rut.util.algorithm.support; o 0-3[W'x<
da'7* &/
import org.rut.util.algorithm.SortUtil; QR.]?t;1
{JJq/[j
/** Y&G]M
* @author treeroot \Q CH.~]
* @since 2006-2-2 I6jDRC0<
* @version 1.0 ?3I93Bt7
*/ F!LVyY"w
public class ImprovedMergeSort implements SortUtil.Sort { 82EH'C
l]bCt b%_
private static final int THRESHOLD = 10; ogOUrJ}P
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/* wDL dmrB
* (non-Javadoc) <9BM%
* jt*VD>ji
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B%.XWW$
*/ J:N4F.o&K
public void sort(int[] data) { K+`$*vS~ws
int[] temp=new int[data.length]; XOdkfmc+s'
mergeSort(data,temp,0,data.length-1); ~> xVhd
} =:4vRq [
^:(:P9h
private void mergeSort(int[] data, int[] temp, int l, int r) { b<1k$0J6
int i, j, k; nB8JdM2h{
int mid = (l + r) / 2; -F]0Py8(
if (l == r) FL,av>mV
return; 5bfd8C
if ((mid - l) >= THRESHOLD) uB`H9
mergeSort(data, temp, l, mid); wva| TZ
else 5ree3 quh
insertSort(data, l, mid - l + 1); T!iRg=<bz
if ((r - mid) > THRESHOLD) snl$v
mergeSort(data, temp, mid + 1, r); voD0u
else >h[ {_+
insertSort(data, mid + 1, r - mid); MPn 6sf9M
$69ef[b
for (i = l; i <= mid; i++) { |?kZfr&9q
temp = data; miq"3
} gvoo1 Sa
for (j = 1; j <= r - mid; j++) { ;&A%"8o
temp[r - j + 1] = data[j + mid]; e%B;8)7
} ~&UfnO
int a = temp[l]; tW=,o&C=
int b = temp[r]; +Vf39}8
for (i = l, j = r, k = l; k <= r; k++) { _:0)uR LS
if (a < b) { a2z1/Nh
data[k] = temp[i++]; 0zL7$Q#c
a = temp; ",pN.<F9O
} else { ql+tqgo
data[k] = temp[j--]; +1R qo
b = temp[j]; ;)SWUXa;{
} LK?V`J5wY
} Q)H1\
} M.[A%_|P
r N.<S[
/** PXH"%vVF
* @param data nVK`H@5fw
* @param l W{{{c2.
* @param i VkD8h+)
*/ C4`u3S
private void insertSort(int[] data, int start, int len) { ,^>WCG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q3~RK[OCq
} {e3XmVAI
} ]t23qA@^2
} 2&k5X-Y
} ~I_v {
_i-(`5
堆排序： IIrXI8'}
w|;kL{(W
package org.rut.util.algorithm.support; 7wm9S4+|
e@GR[0~
import org.rut.util.algorithm.SortUtil; \N?,6;%xB
)]^xy&:|
/** .ZB/!WiF
* @author treeroot (t{m(;/
* @since 2006-2-2 )Q!3p={S*
* @version 1.0 */kX|Sur
*/ .&Vyo<9Ck
public class HeapSort implements SortUtil.Sort{ Wb|xEwqd`
"]"!"#aMv
/* (non-Javadoc) hlgBx~S[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |PI]v`[
*/ z]d^%>Ef
public void sort(int[] data) { }`SXUM_sD`
MaxHeap h=new MaxHeap(); ] VN4;R
h.init(data); LvtZZX6!
for(int i=0;i h.remove(); s[ CnJZ\q
System.arraycopy(h.queue,1,data,0,data.length); e/h2E dY
} ?;//%c8,.
TDMyZ!d
private static class MaxHeap{ WC?}a^ 8
'A|OVyH
void init(int[] data){ H,?)6pZ
this.queue=new int[data.length+1]; 1VH$l(7IQ
for(int i=0;i queue[++size]=data; RZV8{
fixUp(size); nhUL{ER
} ^J([w~&
} ~(|~Ze>
2K8?S
private int size=0; o*L#S1yL
e-taBrl;
private int[] queue; .hD2g"
+>F #{b
public int get() { ,sM>{NK9R
return queue[1]; ,w+}Evp])
} %?4G^f
HfF4BQxm
public void remove() { #*g.hL<
SortUtil.swap(queue,1,size--); `#m>3
fixDown(1); zeXMi:X
} )ny,vcU]
file://fixdown Rj/9\F3H
private void fixDown(int k) { T}?vp~./
int j; q0}?F
while ((j = k << 1) <= size) { mNvK|bTUT
if (j < size %26amp;%26amp; queue[j] j++; #2F 6}
if (queue[k]>queue[j]) file://不用交换 V<#E!MG
break; " -Ie
SortUtil.swap(queue,j,k); ~+y0UEtq7
k = j; /!r#=enG7
} )LA^j|Y}
} h%hE$2
private void fixUp(int k) { ATeXOe
while (k > 1) { W[dMf!(
int j = k >> 1; `mI%Se
if (queue[j]>queue[k]) ]wMp`}$b@L
break; }> 51oBgk_
SortUtil.swap(queue,j,k); e<wRA["
k = j; 0P5!fXs*
} 9}4EW4
} )6S;w7
"dKYJ&$
} $J~~.PUXQ
+Oae3VFf;
} >gt_C'
9"@P.8_
SortUtil： jJpSn[{
r "^{?0
package org.rut.util.algorithm; I92c!`{
=,aWO7Pz
import org.rut.util.algorithm.support.BubbleSort; a?+Ni|+
import org.rut.util.algorithm.support.HeapSort; !f(aWrw7e6
import org.rut.util.algorithm.support.ImprovedMergeSort; :Rs% (Z
import org.rut.util.algorithm.support.ImprovedQuickSort; h=q%h8
import org.rut.util.algorithm.support.InsertSort; dh7PpuN{
import org.rut.util.algorithm.support.MergeSort; !U,^+"l'GP
import org.rut.util.algorithm.support.QuickSort; -jZP&8dPH
import org.rut.util.algorithm.support.SelectionSort; /nK)esB1L
import org.rut.util.algorithm.support.ShellSort; !Q,A#N(
S=Ihg
/** @~!1wPvF`I
* @author treeroot 5-277?
* @since 2006-2-2 >.D0McQg
* @version 1.0 ;w(]z
*/ + *YGsM`E9
public class SortUtil { hIj[#M&6
public final static int INSERT = 1; %j].' ;
public final static int BUBBLE = 2; QK5y%bTSA
public final static int SELECTION = 3; 728}K^7:
public final static int SHELL = 4; iL-I#"qT,
public final static int QUICK = 5; lR!Sdd} -
public final static int IMPROVED_QUICK = 6; (%fl
public final static int MERGE = 7; Nk-biD/J
public final static int IMPROVED_MERGE = 8; mx#H+:}&r
public final static int HEAP = 9; qAH@)}
0Fw0#eE
public static void sort(int[] data) { ;Yrg4/Ipa
sort(data, IMPROVED_QUICK); Mk=;UBb$X
} L3Leb%,!
private static String[] name={ :E|HP#iwu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1i}Rc:
}; mT.p-C
O&#bC
private static Sort[] impl=new Sort[]{ <v?9:}
new InsertSort(), >4:W:;R
new BubbleSort(), _tR%7%3*
new SelectionSort(), "y>\ mC
new ShellSort(), 5Wj+ey^^w
new QuickSort(), ]MkZ1~f7
new ImprovedQuickSort(), '676\2.
new MergeSort(), %Fc,$ =
new ImprovedMergeSort(), 8Ek<J+&|I
new HeapSort() #e.2m5T
}; Na^1dn
khl(9R4a
public static String toString(int algorithm){ 2,nKbE9*
return name[algorithm-1]; :&=TE2
} L~1u?-zu
>4a@rT/
public static void sort(int[] data, int algorithm) { .>0e?A4,5?
impl[algorithm-1].sort(data); A>6b 6
} N\<RQtDg
[y y D-
public static interface Sort { Vw*;xek?
public void sort(int[] data); XD`QU m
} 4BG6C'`%
L<>;E
public static void swap(int[] data, int i, int j) { tb7Wr1$<
int temp = data; #Zpp*S55
data = data[j]; (Rvke!"B
data[j] = temp; Wh%qvV6]
} SGW2'
} {&G7 Xa