[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; C/?x`2'
} FuC#w 9_
int i1=l; mzf~qV^T
int i2=mid+1; mzRH:HgN?
for(int cur=l;cur<=r;cur++){ 63E)RR_Lh
if(i1==mid+1) BOflhoUX
data[cur]=temp[i2++]; y(ceEV
else if(i2>r) bMq)[8,N
data[cur]=temp[i1++]; E-jJ!>&K
else if(temp[i1] data[cur]=temp[i1++]; Sx:JuK@
else 0fGt7 "Q
data[cur]=temp[i2++]; xX?9e3(
} d>gQgQ;g
} r>#4Sr
frokl5L@
} 2BKiA[ ;;
kyi"U A82
改进后的归并排序: +iqzj-e&e[
1B#iJZ}
package org.rut.util.algorithm.support; `@xnpA]l
z6*r<>Bf+b
import org.rut.util.algorithm.SortUtil; 7@R^B=pb
LC7%Bfn!
/** o2D;EUsNX
* @author treeroot 0.\}D:x(z
* @since 2006-2-2 x)jc
* @version 1.0 ?8qN8rk^+
*/ %Rt 5$+dNT
public class ImprovedMergeSort implements SortUtil.Sort { Nwj M=GG
u4tv=+jh
private static final int THRESHOLD = 10; Tn"@u&P *
{%_D>y
/* \9fJ)*-
* (non-Javadoc) 99\lZ{f(
* +[ng99p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V%(T#_E/6
*/ An_3DrUFV_
public void sort(int[] data) { KVevvy)W
int[] temp=new int[data.length]; 2]y Hxo/6
mergeSort(data,temp,0,data.length-1); \[G"/]J
} ]z!Df\I
Kv)Kn8df
private void mergeSort(int[] data, int[] temp, int l, int r) { 4/V;g%0uN;
int i, j, k; TNDp{!<|L;
int mid = (l + r) / 2; Q@"}v_r4
if (l == r) )<%CI#s#
return; ^-LnO%h?
if ((mid - l) >= THRESHOLD) n&!q9CR`
mergeSort(data, temp, l, mid); ~Ede5Vg!!2
else m 7S`u
insertSort(data, l, mid - l + 1); 27i-B\r
if ((r - mid) > THRESHOLD) l_s#7.9$
mergeSort(data, temp, mid + 1, r); x~i\*Ox^
else $ y(Qdb
insertSort(data, mid + 1, r - mid); K5RgWP
]s0GAp"
for (i = l; i <= mid; i++) { 194n
temp = data; O2":)zU.
} z6Fl$FFP
for (j = 1; j <= r - mid; j++) { ZA&bp{}D
temp[r - j + 1] = data[j + mid]; mBEMwJ}O`
} ]Exbuc
int a = temp[l]; k]A=Q
int b = temp[r]; nq,:UYNJ
for (i = l, j = r, k = l; k <= r; k++) { R, #szTu
if (a < b) { d;,Jf*x\
data[k] = temp[i++]; B8unF=u
a = temp; 0dIGX |e
} else { .F'Cb)Z
data[k] = temp[j--]; Aj]/A
b = temp[j]; Lf:#koaC
} guVuO
} ex#-,;T
} <`WDNi$Y
l9]nrT1Hy
/** V$wbmz
* @param data g:.LCF
* @param l ^I9U<iNIL
* @param i ^F qs,^~W
*/ \PD%=~
private void insertSort(int[] data, int start, int len) { ?VCp_Ji
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $> ;|
} s1R#X~d
} 39m8iI%w[
} /l$fQ:l
} mG1!~}[
GPizR|}h
堆排序： ~$ Po3]{s
E^Ch;)j|
package org.rut.util.algorithm.support; mN l[D
PZvc4
import org.rut.util.algorithm.SortUtil; AHMvh 7O?
OJ7Uh_;/
/** L8Q/!+K
* @author treeroot o6RT4`
* @since 2006-2-2 x[fp7*TiG
* @version 1.0 8QMMKOui\
*/ <Qr*!-Kc6
public class HeapSort implements SortUtil.Sort{ elR1NhB|p
R%~~'/2V
/* (non-Javadoc) #V)l>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W9{;HGWS
*/ =jA.INin4
public void sort(int[] data) { >0u*E *Y
MaxHeap h=new MaxHeap(); :#\jx
h.init(data); ]<ay_w;
for(int i=0;i h.remove(); I?nU+t;
System.arraycopy(h.queue,1,data,0,data.length); 6kMEm)YjT
} 3sRI7g
V lkJ$f5l
private static class MaxHeap{ R5mb4
V6+:g=@U-l
void init(int[] data){ 4jlwu0L+
this.queue=new int[data.length+1]; BpGyjoJ2
for(int i=0;i queue[++size]=data; tk)}4b^\%j
fixUp(size); V3T.EW
} h#Mx(q
} Hq~SRc~
?r*}1WsH
private int size=0; 'R2*3<
=(~*8hJ
private int[] queue; a^^OI|?
{u0sbb(
public int get() { @\:@_}Z`_}
return queue[1]; PN=5ICT
} c,]fw2
s0CDp"uJY
public void remove() { xIV#}z0
SortUtil.swap(queue,1,size--); Q/J<$W*,
fixDown(1); mwn$ey&QE
} &4%78K\
file://fixdown Z2-tDp(I
private void fixDown(int k) { &_s^C?x
int j; 6(7dr?^eGT
while ((j = k << 1) <= size) { ;mr*$Iu7|
if (j < size %26amp;%26amp; queue[j] j++; 6ZwQ/~7H
if (queue[k]>queue[j]) file://不用交换 nEP3B'+
break; _mQj=
SortUtil.swap(queue,j,k); /1m+iM^V
k = j; E(z|LS*3
} kpy)kS
} /!.]Y8yEH
private void fixUp(int k) { GO*D4<#u
while (k > 1) { BlM(Q/z
int j = k >> 1; U]B-B+-
if (queue[j]>queue[k]) arS@l<79
break; 5E 9R+N
SortUtil.swap(queue,j,k); xX0wn?,~
k = j; {iCX?Sb
} sk_xQo#Y 3
} gxJ12' m
h`eHoKJ#w
} hFan$W$
'*Tt$0#o
} ynf!1!4
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SortUtil： _PQk<QZ
<]_[o:nOP
package org.rut.util.algorithm; ^rO!-
}[PC YnS
import org.rut.util.algorithm.support.BubbleSort; qP zxP @4
import org.rut.util.algorithm.support.HeapSort; jK%Lewq
import org.rut.util.algorithm.support.ImprovedMergeSort; (dx~lMI
import org.rut.util.algorithm.support.ImprovedQuickSort; @k#xr
import org.rut.util.algorithm.support.InsertSort; 32y 9rz
import org.rut.util.algorithm.support.MergeSort; yigq#h^
import org.rut.util.algorithm.support.QuickSort; YN7OQqa
import org.rut.util.algorithm.support.SelectionSort; cBU3Q<^
import org.rut.util.algorithm.support.ShellSort; hBifn\dFr
ah(k!0PV
/** dDAl n+
* @author treeroot )c 79&S
* @since 2006-2-2 yMmUOIxk\
* @version 1.0 DMSC(Sz
*/ ;#8xRLW
public class SortUtil { .$Yp~
public final static int INSERT = 1; E8t{[N6d
public final static int BUBBLE = 2; tO D}&
public final static int SELECTION = 3; 9+8N-LZ
public final static int SHELL = 4; bb+iUV|Do
public final static int QUICK = 5; K(?p]wh
public final static int IMPROVED_QUICK = 6; kbbHa_;aqV
public final static int MERGE = 7; rt?*eC1b+Z
public final static int IMPROVED_MERGE = 8; 8wEJyAu2
public final static int HEAP = 9; PCa0I^d
K$s{e0 79
public static void sort(int[] data) { SLH;iqPT
sort(data, IMPROVED_QUICK); 83aWMmA(1
} ttt4h
private static String[] name={ !9.\A:G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "5Z5x%3I
}; A6E~GJa
-D1A
private static Sort[] impl=new Sort[]{ JL<<EPC
new InsertSort(), F7]8*[u
new BubbleSort(), v-"nyy-&Z
new SelectionSort(), !kH 1|
new ShellSort(), 0,8RA_Ca}
new QuickSort(), 9%0^fhrJ
new ImprovedQuickSort(), \J;]g\&I"
new MergeSort(), &IsPqO
new ImprovedMergeSort(), ~jz51[{v
new HeapSort() rZ.z!10
}; o,?h}@
*D`$oK,U
public static String toString(int algorithm){ N] pw7S%
return name[algorithm-1]; RX^Xtc"
} |0X~D}r|J
ta'wX
public static void sort(int[] data, int algorithm) { *_HF%JYMZ
impl[algorithm-1].sort(data); # $'H?lO
} QBfo=9[=e
/#q6.du
public static interface Sort { FJ{&R Ld
public void sort(int[] data); hx4c`fOs
} X+N8r^&
Im]6-#(9\|
public static void swap(int[] data, int i, int j) { EN8xn9M?
int temp = data; m,}GP^<1i
data = data[j]; fhC|=0XB
data[j] = temp; M7-2;MZ
} _kBx2>qQ
} ?N@[R];