[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; 7!d<>_oH
} 6b5{
int i1=l; ^L2Zo'y [
int i2=mid+1; ="PywZ
for(int cur=l;cur<=r;cur++){ Lm2cW$s
if(i1==mid+1) 3n"&$q6
data[cur]=temp[i2++]; j1C0LP8
else if(i2>r) g&20F`.N*>
data[cur]=temp[i1++]; ~#xs `@{s
else if(temp[i1] data[cur]=temp[i1++]; ^K@GK
else R5YtCw]i=
data[cur]=temp[i2++]; 5Szo5
} 6Yi,%#
} ZkG##Jp\>
4w
} SodW5v a
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改进后的归并排序: YH6K-}
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package org.rut.util.algorithm.support; Z|7I }i
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import org.rut.util.algorithm.SortUtil; p{_O*bo
&5CeRx7%
/** ]$X=~>w
* @author treeroot . *+7xL
* @since 2006-2-2 bJu,R-f
* @version 1.0 TuPxyB
*/ u(Q(UuI
public class ImprovedMergeSort implements SortUtil.Sort { ).6/ii9gt
l@2`f#y1~<
private static final int THRESHOLD = 10; lJpv
7VD7di=D
/* +.Ukzu~s
* (non-Javadoc) P>cJ~FM
* Lgw@y!Llij
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kxiyF$ 9
*/ (W6\%H2u
public void sort(int[] data) { H0:6zSsc=|
int[] temp=new int[data.length]; Kd21:|!t^
mergeSort(data,temp,0,data.length-1); ojI"<Q~g
} V'#u_`x"D)
l`G:@}P>G
private void mergeSort(int[] data, int[] temp, int l, int r) { r/w@Dh]{_
int i, j, k; T{kwy3
int mid = (l + r) / 2; B3=/iOb#
if (l == r) lY8Qy2k|
return; r3K:
if ((mid - l) >= THRESHOLD) *8HxJ+[,[
mergeSort(data, temp, l, mid); 57%cN-v*
else ",oUVl
insertSort(data, l, mid - l + 1); X=}0+W
if ((r - mid) > THRESHOLD) @)Y7GM+^
mergeSort(data, temp, mid + 1, r); 0L-g'^nn
else k3eN;3#&
insertSort(data, mid + 1, r - mid); zm.sX~j
U*l>8
for (i = l; i <= mid; i++) { Xm+3`$<
temp = data; ` R-np_
} Rla*hc~
for (j = 1; j <= r - mid; j++) { `t"Kq+
temp[r - j + 1] = data[j + mid]; &cejy>K
} =I3U.^:
int a = temp[l]; BuO J0$
int b = temp[r]; ^@cX0_
for (i = l, j = r, k = l; k <= r; k++) { 9%veUvY
if (a < b) { %zVv3p:
data[k] = temp[i++]; y9mZQq
a = temp; agot (
} else { -igZU>0B_
data[k] = temp[j--]; B(NL3WJ
b = temp[j]; p 8rAtz>=J
} +OP'/
} 3hjwwLKG$
} _)\,6| #
gpl!Iz~5
/** cSWVHr
* @param data CawVC*b3
* @param l X~b+LG/
* @param i 8hV:bz"
*/ 7hE=+V8
private void insertSort(int[] data, int start, int len) { W u{nC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'v5gg2
} mSp7H!
} ?NeB_<dLa`
} {[#
} !7|9r$
%^A++Z$`
堆排序： ~Dh}E9E:
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package org.rut.util.algorithm.support; %ua5T9H Z
$^GnY7$!>
import org.rut.util.algorithm.SortUtil; 8`<GplO
<FLc0s
/** ~)(Dm+vZ
* @author treeroot q|\Cp
* @since 2006-2-2 [X\2U4
* @version 1.0 b&&'b)
*/ w%na n=
public class HeapSort implements SortUtil.Sort{ cE?J]5#^
yx4c+(J^8
/* (non-Javadoc) cV,URUD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `_kRvpi
*/ 5T*7HC[
public void sort(int[] data) { ]C^*C|
MaxHeap h=new MaxHeap(); yIP IA%dJ
h.init(data); 6FAP *V;
for(int i=0;i h.remove(); /zAx`H
System.arraycopy(h.queue,1,data,0,data.length); \|s/_35(
} :a`m9s 4
HRh".!lxy
private static class MaxHeap{ o$;x[US
6jA Q
void init(int[] data){ 4Yk(ldR~
this.queue=new int[data.length+1]; OC.@C}u
for(int i=0;i queue[++size]=data; M1\/ueOe
fixUp(size); cQb%bmBc5
} h<q``hn>
} T!r7RS
T9yW# .
private int size=0; %UhF=C
G3n7x?4m
private int[] queue; s"Wdbw(O'
jiDYPYx;I
public int get() { Nq3P?I(<
return queue[1]; 6=D;K.!
} 3._fbAN%e
0SYkDI
public void remove() { C7:Ry)8'I
SortUtil.swap(queue,1,size--); 0>Nq$/!
fixDown(1); iddT.
} $cedO']
file://fixdown v'=APl+_
private void fixDown(int k) { )i>KgX
int j; BGS6uV4^>
while ((j = k << 1) <= size) { ~b/>TKn+
if (j < size %26amp;%26amp; queue[j] j++; mB`r6'#=
if (queue[k]>queue[j]) file://不用交换 &,xM;8b
break; 7v_e"[s~
SortUtil.swap(queue,j,k); A>k;o0r
k = j; 1lM0pl6M
} oB@C-(M
} h !1c(UR
private void fixUp(int k) { {I ,'
while (k > 1) { g*uO IF
int j = k >> 1; 1d6pQ9 N
if (queue[j]>queue[k]) |ouk;r24V
break; Uw!v=n3#!
SortUtil.swap(queue,j,k); 7+bzCDKU
k = j; |iI`p-L9
} TMrmyvv
} '}=M~
5s9~rm
} qZ.\GHS
g& Rk}/F
} fi)ypv*
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SortUtil： hkY E7
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package org.rut.util.algorithm; B(5g&+{Lq~
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import org.rut.util.algorithm.support.BubbleSort; |qD<h
import org.rut.util.algorithm.support.HeapSort; s.U p<Rw
import org.rut.util.algorithm.support.ImprovedMergeSort; @{G(.S
import org.rut.util.algorithm.support.ImprovedQuickSort; l;ugrAo?
import org.rut.util.algorithm.support.InsertSort; !ibp/:x
import org.rut.util.algorithm.support.MergeSort; e;$s{CNo
import org.rut.util.algorithm.support.QuickSort; 4{_5z7ody
import org.rut.util.algorithm.support.SelectionSort; *MNY1+RJ
import org.rut.util.algorithm.support.ShellSort; D{mu2'q
#"|Ey6&
/** cVMTT]cj1
* @author treeroot 3 V<8
* @since 2006-2-2 jB;+tDC!Co
* @version 1.0 %AFy{l
*/ R?(j#bk
public class SortUtil { GUxhCoxb
public final static int INSERT = 1; 6ZE]7~X
public final static int BUBBLE = 2; N78Ev7PN
public final static int SELECTION = 3; )L?Tq"hy
public final static int SHELL = 4; Z=xrjE
public final static int QUICK = 5; |[ge,MO:
public final static int IMPROVED_QUICK = 6; c=5$bo]LI
public final static int MERGE = 7; C,E 5/XW
public final static int IMPROVED_MERGE = 8; :MpCj<<[
public final static int HEAP = 9; n1ICW 9
@'QBrE
public static void sort(int[] data) { 7Vi[I< *
sort(data, IMPROVED_QUICK); XxGm,A+>Ty
} bFpwq#PDW>
private static String[] name={ rr*IIG&.5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E4{8 $:q=
}; \,WPFV
GM5::M]fS
private static Sort[] impl=new Sort[]{ mxIEg?r(
new InsertSort(), #KIHq2:.4
new BubbleSort(), `c icjA@~
new SelectionSort(), b#b#r
new ShellSort(), b% F|VG
new QuickSort(), 5Z@Q^
new ImprovedQuickSort(), !@Ox%vK
new MergeSort(), T|u)5ww%
new ImprovedMergeSort(), {0|^F!1z
new HeapSort() w/&#UsEIr
}; +mY(6|1
p(Sfw>t(
public static String toString(int algorithm){ FY'f{gD^
return name[algorithm-1]; 7}Gy%SJ`
} |Qm 7x[i
YRK4l\_`
public static void sort(int[] data, int algorithm) { =hA/;
impl[algorithm-1].sort(data); 7"gy\_M
} t((0]j^
vm(% u!_P
public static interface Sort { Co'dZd(
public void sort(int[] data); A9"ho}<
} -kJ`gdS
8?PNyO-Wt5
public static void swap(int[] data, int i, int j) { gw H6r3=y(
int temp = data; =0Nd\
data = data[j]; 'b-}KDP
data[j] = temp; ]8RcZn
} {h2D}F
} J~==<?j: