[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; ha
} Je_Hj9#M\d
int i1=l; +#8?y 5~q
int i2=mid+1; QwXM<qG*
for(int cur=l;cur<=r;cur++){ Hn)K;?H4
if(i1==mid+1) !P/ ]o
data[cur]=temp[i2++]; =<fH RX`
else if(i2>r) 7iu?Q
data[cur]=temp[i1++]; 6G6Hg&B
else if(temp[i1] data[cur]=temp[i1++]; nL!h hseH
else RrKAgw
data[cur]=temp[i2++]; a OR}
} I8HUH*|)n
} cw.Uy(ks|$
?GqFtNz
} uA=6 HpDB
oc'#sE
改进后的归并排序: HRIf)n&~f
*V#v6r7<Y/
package org.rut.util.algorithm.support; UXD?gK1
7Z5,(dH>
import org.rut.util.algorithm.SortUtil; Ht+ng
qY\zZ
/** (y|{^@
* @author treeroot g0I<Fan
* @since 2006-2-2 g!~&PT)*
* @version 1.0 hY+3PNiI@
*/ 2n+j.
public class ImprovedMergeSort implements SortUtil.Sort { H^xrFXg~z
$UW!tg*U&
private static final int THRESHOLD = 10; heoOOP(#
SFoF]U09
/* vM~/|)^0sW
* (non-Javadoc) i0/gyK
* s([9/ED
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fp4?/-]
*/ *E:w377<}
public void sort(int[] data) { W093rNF~
int[] temp=new int[data.length]; Tj*o[2mD
mergeSort(data,temp,0,data.length-1); T[a1S?_*T
} ju0]~,
TFbCJ@X
private void mergeSort(int[] data, int[] temp, int l, int r) { M['25[
int i, j, k; <y'B !d#
int mid = (l + r) / 2; jjBcoQU$o
if (l == r) gXI_S9z
return; v}A] R9TY
if ((mid - l) >= THRESHOLD) d hiLv_/
mergeSort(data, temp, l, mid); Iu|G*~\
else a<tUpI$
insertSort(data, l, mid - l + 1); OdgfvHDgW
if ((r - mid) > THRESHOLD) p9R`hgx
mergeSort(data, temp, mid + 1, r); ]n?a h
else wJ!
insertSort(data, mid + 1, r - mid); S$W *i@x?
RL~|Kr<7J
for (i = l; i <= mid; i++) { a$#,'UB
temp = data; OQ#gQ6;?0
} ~]Mq'
for (j = 1; j <= r - mid; j++) { .Y'kDuUu
temp[r - j + 1] = data[j + mid]; X^%I 3
} COv#dOw
int a = temp[l]; %#Wg>6
int b = temp[r]; ;w4rwL
for (i = l, j = r, k = l; k <= r; k++) { V'c9DoSRI\
if (a < b) { Fdd$Bl.&XS
data[k] = temp[i++]; 8"wA8l.
a = temp; "A__z|sQ
} else { SAs'u"EB
data[k] = temp[j--]; +;#hED;8
b = temp[j]; . )Fn]x"<
} H:U1#bQQ:
} ;G!X?(%+
} M<7<L
Bx E1Ky8@A
/** aFo%B; 8m
* @param data 6`NsX
* @param l =N<Hc:<t4
* @param i L"zOa90ig
*/ <y*#[:i
private void insertSort(int[] data, int start, int len) { 8/b_4!5c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0'^? m$
} HT A-L>Cee
} OI %v>ns
} @U;-5KYYi
} v7O{8K+
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堆排序： z-[Jbjhd
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package org.rut.util.algorithm.support; {xEX_$nv
wX#\\Jgi
import org.rut.util.algorithm.SortUtil; U,iTURd
#`z!f0 P
/** oLruYSaD
* @author treeroot }y|%wym
* @since 2006-2-2 Uvf-h4^J]:
* @version 1.0 /qI80KVnN
*/ ehxtNjA
public class HeapSort implements SortUtil.Sort{ Yc:b:\0}F6
XF\`stEnb
/* (non-Javadoc) <n }=zu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ":]O3 D{r
*/ rorzxp{
public void sort(int[] data) { z&<Rx[
MaxHeap h=new MaxHeap(); P_-zkw
h.init(data); +hjc~|RK
for(int i=0;i h.remove(); V$q%=Sip
System.arraycopy(h.queue,1,data,0,data.length); Vz 5:73
} 1b6gTfU
xO1d^{~^^
private static class MaxHeap{ 6J%SkuxR
XF^c(*5
void init(int[] data){ ys+?+dY2
this.queue=new int[data.length+1]; #l;Ekjfz
for(int i=0;i queue[++size]=data; h^hEyrJw
fixUp(size); wk9tJ#}
} U45/%?kE)
} 2d.I3z:[
7UQD02
private int size=0; = 1}-]ctVn
bs+KcY:N]
private int[] queue; cR@z^
s ]QzNc
public int get() { i":-g"d
return queue[1]; NPB':r-8
} NLz$jk%=g
Qs%f6rL
public void remove() { B|,6m 3.
SortUtil.swap(queue,1,size--); KL5rF,DME
fixDown(1); ~PlwPvWo
} Iu1P}R>C
file://fixdown DN^ln%#
private void fixDown(int k) { G)<k5U4
int j; \re.KB#R
while ((j = k << 1) <= size) { RtqW!ZZ:H
if (j < size %26amp;%26amp; queue[j] j++; B.Xm*adBT
if (queue[k]>queue[j]) file://不用交换 ,{oP`4\Lm
break; ppV\FQ{K
SortUtil.swap(queue,j,k); Ce_Z &?
k = j; ~MhPzu&B
} jC\R8_
} ^<% w'*gR
private void fixUp(int k) { uxh4nyE
while (k > 1) { k*M{?4
int j = k >> 1; YRYrR|I
if (queue[j]>queue[k]) n53}79Uiz
break; aY {.
SortUtil.swap(queue,j,k); m
k = j; *JpEBtTv=5
} (|6qN
} nIsi
p:4vjh=1h
} W_DO8nX
v>nJy~O]
} 10[~ki-1;
$C[YqZO
SortUtil： a,j!B hu
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package org.rut.util.algorithm; *Lh0E/5
"(C}Dn#
import org.rut.util.algorithm.support.BubbleSort; e<C5}#wt
import org.rut.util.algorithm.support.HeapSort; M1ayAXO
import org.rut.util.algorithm.support.ImprovedMergeSort; sdO;vp^:b
import org.rut.util.algorithm.support.ImprovedQuickSort; 6iC}%eU
import org.rut.util.algorithm.support.InsertSort; 2j"%}&
import org.rut.util.algorithm.support.MergeSort; r{<u\>6X>P
import org.rut.util.algorithm.support.QuickSort; a"&Z!A:Z=
import org.rut.util.algorithm.support.SelectionSort; sztnRX_
import org.rut.util.algorithm.support.ShellSort; Mys;Il"
L>L4%?
/** g{D&|qWj
* @author treeroot "QlCcH`g
* @since 2006-2-2 NA3yd^sr
* @version 1.0 #g|j;{P
*/ C$(t`G
public class SortUtil { )0GnTB;5Z
public final static int INSERT = 1; =Q|}7g8o
public final static int BUBBLE = 2; n!N;WL3k
public final static int SELECTION = 3; A>4k4*aFm#
public final static int SHELL = 4; l y%**iN
public final static int QUICK = 5; .K7A!;
public final static int IMPROVED_QUICK = 6; cX=` Tl
public final static int MERGE = 7; C>03P.s4c
public final static int IMPROVED_MERGE = 8; Vm.u3KE
public final static int HEAP = 9; ]{"(l(
c:$:j,i}
public static void sort(int[] data) { .xk<7^ZD
sort(data, IMPROVED_QUICK); q?MYX=Y6
} 4kz8U
private static String[] name={ &FZe LIt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2fLd/x~
}; Ke/P[fo
i5wA=K_
private static Sort[] impl=new Sort[]{ Y7jD:P
new InsertSort(), (la
new BubbleSort(), txgGL'
new SelectionSort(), DRzpV6s
new ShellSort(), CTI(Kh+
new QuickSort(), K8+b\k4E
new ImprovedQuickSort(), ^y3\e
new MergeSort(), yf8UfB#a
new ImprovedMergeSort(), 0 /kbxpih
new HeapSort() FQ87[| S
}; u+R?N% EKP
Mb9q<4
public static String toString(int algorithm){ SKtEEFyIR_
return name[algorithm-1]; $e;!nI;z
} )N6R#
B>]5/!_4
public static void sort(int[] data, int algorithm) { c,-x}i0c
impl[algorithm-1].sort(data); 1Efl|lV
} =ddx/zN
Nb8<8O ^
public static interface Sort { Y5NbY02E
public void sort(int[] data); KGWENX_U
} .;F+ QP0
EUn"x'
public static void swap(int[] data, int i, int j) { $oQsh|sTI
int temp = data; hHg gH4T
data = data[j]; 5HIpoj;\(
data[j] = temp; 6m" 75
} M"vcF5q
} u7C{>