[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; }z,f8Yz
} %^KNY ;E
int i1=l; 0]k-0#JM
int i2=mid+1; yt+d f0l
for(int cur=l;cur<=r;cur++){ P!xN]or]u
if(i1==mid+1) X+7@8)1(
data[cur]=temp[i2++]; XP%/*am
else if(i2>r) W!Fu7a
data[cur]=temp[i1++]; a1dkB"Zp.p
else if(temp[i1] data[cur]=temp[i1++]; EBMZ7b-7
else i+@t_pxc
data[cur]=temp[i2++]; ioT+,li
} T/$hN hQK
} 1c4@qQyo
wNm1H[{
} D}T+X;u)K
?v,4seRuz
改进后的归并排序: ;%^T*?t
eKvQS}11
package org.rut.util.algorithm.support; }rA _4%
b wqd`C
import org.rut.util.algorithm.SortUtil; E}lNb
:{=2ih-}
/** R>B4v+b
* @author treeroot tlyDXB~+
* @since 2006-2-2 0eFvcH:qG
* @version 1.0 hQ_gOI
*/ }@TtX\7(D
public class ImprovedMergeSort implements SortUtil.Sort { fI }v}L^
pxV@fH+`
private static final int THRESHOLD = 10; >5MHn@
<G60R^o
/* PzH#tG&.j
* (non-Javadoc) Dssecc'
* mw flx8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aX}:O
*/ GF17oMi
public void sort(int[] data) { #,;X2%c
int[] temp=new int[data.length]; ;@s'JSPt
mergeSort(data,temp,0,data.length-1); 9-hVlQ~|
} VWT\wAL
hZ~\Z S7
private void mergeSort(int[] data, int[] temp, int l, int r) { zrE Dld9
int i, j, k; M?.[Rr-uw
int mid = (l + r) / 2; f[+N=vr
if (l == r) l g43
return; n]a/nv
if ((mid - l) >= THRESHOLD) CAtdx!
mergeSort(data, temp, l, mid); V)3S.*]
else 0=I:VGC3
insertSort(data, l, mid - l + 1); pa2cM%48
if ((r - mid) > THRESHOLD) tish%Qnpd
mergeSort(data, temp, mid + 1, r); &vV_,$
else 1gh<nn
insertSort(data, mid + 1, r - mid); f{ER]U
b$/'dnx
for (i = l; i <= mid; i++) { -=VGXd
temp = data; BjAmM*k
} !fK9YW(Im
for (j = 1; j <= r - mid; j++) { lAAs/
temp[r - j + 1] = data[j + mid]; C?fa-i0l^
} 'bx$}w N
int a = temp[l]; NTy0NH
int b = temp[r]; ~[3B<^e
for (i = l, j = r, k = l; k <= r; k++) { oa:30@HSb
if (a < b) { +lED6]+%
data[k] = temp[i++]; | x/Z qY
a = temp; p}9bZKyf
} else { r0fEW9wL
data[k] = temp[j--]; " twq#Alx
b = temp[j]; h+d3JM
} Dfl%Knl@J
} %2z]2@
} ]}HuK#
RqE|h6/
/** i2Cw#x0s
* @param data E'wJ+X9 +
* @param l %:vMD
* @param i Kfk/pYMDq
*/ /G& %T
private void insertSort(int[] data, int start, int len) { Avr2MaY{h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $9Asr07
} 8}<4f|?
} xji2#S%
} <j^bk"l p
} j_Qkw ?
fsH=2p
堆排序： 5V"g,]'Nd
N;.}g*_+}
package org.rut.util.algorithm.support; B?p18u$i#l
A0`#n|(Ad!
import org.rut.util.algorithm.SortUtil; LJ+Qe%|
[(PD2GO+
/** +*vg)F:
* @author treeroot f_qW+fN::s
* @since 2006-2-2 ^oT!%"\
* @version 1.0 )[d>?%vfd
*/ j@4AY}[tX
public class HeapSort implements SortUtil.Sort{ @EV*QC2l;Y
Vi o ~2
/* (non-Javadoc) csNB \
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <C6*-j1oz
*/ d]<S/D'i
public void sort(int[] data) { %9lx)w
MaxHeap h=new MaxHeap(); Vp~c$y+
h.init(data); OPP^n-iPr
for(int i=0;i h.remove(); ">D7wX,.>
System.arraycopy(h.queue,1,data,0,data.length); WjVj@oC
} mf\eg`'4?
GfMCHs
private static class MaxHeap{ Kfl#78$d
Z<^TO1xs9B
void init(int[] data){ 1?j['~aE
this.queue=new int[data.length+1]; !Ey=
for(int i=0;i queue[++size]=data; ^qP}/H[QT
fixUp(size); {'e%Hx
} T_=iJ: Q
} "0edk"hk
~.H*"
private int size=0; |A0)-sVZ
fu]mxGPc
private int[] queue; p ! _\a
&)y$XsSMW
public int get() { 4UV<Q*B\F
return queue[1]; *dw6>G0U
} DLP G
ZI>')T<@j"
public void remove() { ,2C{X+t
SortUtil.swap(queue,1,size--); gvLzE&V}
fixDown(1); zIE{U
} TC$)::C1
file://fixdown 'gQ0=6(\
private void fixDown(int k) { 4' MmT'
int j; zXRq) ;s
while ((j = k << 1) <= size) { .\6q\7Ej
if (j < size %26amp;%26amp; queue[j] j++; xq<3*Bcw
if (queue[k]>queue[j]) file://不用交换 <*'%Xgm
break; HZDeQx`*s
SortUtil.swap(queue,j,k); vz1yH%~E
k = j; -fm1T|>#
} KqI<#hUl
} ZJ Ke}F`l
private void fixUp(int k) { H/?@UJ5m
while (k > 1) { _hz}I>G@B
int j = k >> 1; :U!@
if (queue[j]>queue[k]) pSC\[%K
break; #FNSE*Y
SortUtil.swap(queue,j,k); o,D7$WzL
k = j; <jwQ&fm)/R
} "7X[@xX@
} {k"t`uo_
ah9P C7[
} }#Gq*^w
7kDqgod^A
} 1](PuQm7+
"AcC\iq
SortUtil： suF<VJ)&s
Wp2$L-T&$
package org.rut.util.algorithm; _<LJQ
tP0\;W
import org.rut.util.algorithm.support.BubbleSort; E'ay @YAp
import org.rut.util.algorithm.support.HeapSort; WNmG'hlA
import org.rut.util.algorithm.support.ImprovedMergeSort; |@*3 nb8
import org.rut.util.algorithm.support.ImprovedQuickSort; Ua2waA
import org.rut.util.algorithm.support.InsertSort; XTro;R=#
import org.rut.util.algorithm.support.MergeSort; 5HqvSfq>?
import org.rut.util.algorithm.support.QuickSort; !CGpE=V
import org.rut.util.algorithm.support.SelectionSort; Z&![W@m@0N
import org.rut.util.algorithm.support.ShellSort; yRyUOTK
]I<w;.z
/** u"s@eN
* @author treeroot 92 oUQ EK
* @since 2006-2-2 mNk@WY_F
* @version 1.0 # X`t~Y'
*/ $3'xb/3|
public class SortUtil { W_bp~Wu
public final static int INSERT = 1; bCL/"OB
public final static int BUBBLE = 2; x=VLTH/oo
public final static int SELECTION = 3; RoLN#
public final static int SHELL = 4; 089 <B& <
public final static int QUICK = 5; nQaryL
public final static int IMPROVED_QUICK = 6; ZR8%h<
public final static int MERGE = 7; h7a/]~
public final static int IMPROVED_MERGE = 8; w =2; QJ<
public final static int HEAP = 9; s$D"
5>!I6[{
public static void sort(int[] data) { ^(+@uuBx
sort(data, IMPROVED_QUICK); dzRnI*
} [fZhfZ)<
private static String[] name={ lK%)a +2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bHK[Z5
}; h2P&<ggqX
)zv"<>Q 6
private static Sort[] impl=new Sort[]{ \TS.9 >\
new InsertSort(), /)*si
new BubbleSort(), !~_6S*~
new SelectionSort(), HrS-o=
new ShellSort(), ym;I(TC+
new QuickSort(), l0K_29^
new ImprovedQuickSort(), 9'Cu9nR
new MergeSort(), C1w6[f1+
new ImprovedMergeSort(), ZU68\cL
new HeapSort() ZE[NQ8
}; E0*62OI~O
%%+@s
public static String toString(int algorithm){ 9yYNX;C
return name[algorithm-1]; 8'-E>+L
} O^DLp/vM
=:=s
public static void sort(int[] data, int algorithm) { sUk&NM%>
impl[algorithm-1].sort(data); gHox>r6.A
} qS/ 'Kyp_
4K0Fc^-
public static interface Sort { ?W\KIp\Kn
public void sort(int[] data); <~hx ~"c
} Q6$^lRNOpk
y3Ul}mVhA
public static void swap(int[] data, int i, int j) { wJg&OQc9
int temp = data; ,Yu2K`
data = data[j]; PnJA'@x
data[j] = temp; @g]>D
} S76xEL
} $VJE&b