[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; Xbap'/t
} <rCl
int i1=l; YjsaTdZ!&
int i2=mid+1; _@d.wfM
for(int cur=l;cur<=r;cur++){ !E$S&zVMQ
if(i1==mid+1) 55yP.@i9J
data[cur]=temp[i2++]; a?D\H5TF-
else if(i2>r) 5g/WQo\
data[cur]=temp[i1++]; D6v0n6w
else if(temp[i1] data[cur]=temp[i1++]; 57HMWlg
else *emUQ/uvf
data[cur]=temp[i2++]; P~]BB.tog
} !'PPj_Hp]
} O81})r*Y
w|RG
} 4>, <b1Y
S&]JY
改进后的归并排序: QtX ->6P>
n*-#VKK^
package org.rut.util.algorithm.support; m_St"`6 .
<27e7H*6
import org.rut.util.algorithm.SortUtil; 7dW9i7Aj
) d\Se9!
/** dnN"
* @author treeroot JQ.ZAhv
* @since 2006-2-2 nYE_WXY3V
* @version 1.0 qk:F6kL\`
*/ 43 |zjE
public class ImprovedMergeSort implements SortUtil.Sort { Oj<2_u
Ujw^j
private static final int THRESHOLD = 10; \DfvNeF
Gz6FwU8L
/* ){gOb
* (non-Javadoc) VS 8|lgQ
* {kmaMP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )"f>cYF
*/ Q&n|tQ*4
public void sort(int[] data) { iv56zsR
int[] temp=new int[data.length]; KiCZEA
mergeSort(data,temp,0,data.length-1); 2-{8+*_'
} . vYGJ8(P
,ZH)[P)5P
private void mergeSort(int[] data, int[] temp, int l, int r) { ]YwIuz6]
int i, j, k; Y`c\{&M6
int mid = (l + r) / 2; =0m[
if (l == r) o_={xrmIA
return; qWr`cO~hc
if ((mid - l) >= THRESHOLD) dqG+hh^
mergeSort(data, temp, l, mid); gS"@P:wYzs
else {;z3$/JB
insertSort(data, l, mid - l + 1); )V9$ P)
if ((r - mid) > THRESHOLD) 5*4P_q(AxD
mergeSort(data, temp, mid + 1, r); :*4yR46
else T0aK1Lh
insertSort(data, mid + 1, r - mid); Z1q'4h=F.
Wp>W?'`
for (i = l; i <= mid; i++) { @^`f~0#:
temp = data; J7mT&U&Ru
} 2t[inzn=E
for (j = 1; j <= r - mid; j++) { vwP516EM
temp[r - j + 1] = data[j + mid]; Zso.3FR,
} EB>laZy>
int a = temp[l]; *Z{W,8h*s
int b = temp[r]; s$`evX7D
for (i = l, j = r, k = l; k <= r; k++) { 5#:tL&q
if (a < b) { ( 6r9y3'
data[k] = temp[i++]; ^=W%G^jJy
a = temp; SDTX0v
} else { $\0j:<o
data[k] = temp[j--]; e6{/e+/R
b = temp[j]; VsUEp_I
} E{lq@it32p
} n>!E ]
} S _#UEf
lt(,/
/** (|bht0
* @param data zW+Y{^hf
* @param l J$'T2@H#
* @param i AKL~F|t
*/ 3,iL#_+t
private void insertSort(int[] data, int start, int len) { x\t>|DB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'OJXllGi
} b6g,mzqu
} ]=h Ts%]w
} >"ZTyrK
} +Mg^u-(A
c*6o{x}K
堆排序： @|5B
]4hXK!^Uu
package org.rut.util.algorithm.support; J'2R-CI,
ZZlR:D
import org.rut.util.algorithm.SortUtil; [i&z_e)
9E (>mN
/** AV%Q5Mi}
* @author treeroot !nykq}kPN\
* @since 2006-2-2 Gt- -7S
* @version 1.0 9:@os0^O
*/ ]kKf4SJZFU
public class HeapSort implements SortUtil.Sort{ }H^#}
d(fgv
/* (non-Javadoc) TcRnjsY$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {4:En;
*/ #=$4U!yL
public void sort(int[] data) { a^sR?.+3
MaxHeap h=new MaxHeap(); *~fN^{B'!
h.init(data); 4e*0kItC
for(int i=0;i h.remove(); %zX'u.}8#
System.arraycopy(h.queue,1,data,0,data.length); f+/^1~^
} 6bqJM#y@
21cIWvy
private static class MaxHeap{ SxQ|1:i%
R[#5E|` `9
void init(int[] data){ R]ppA=1*_l
this.queue=new int[data.length+1]; _NZ) n)
for(int i=0;i queue[++size]=data; s"a*S\a;b
fixUp(size); 2%WZ-l!i
} eKu&_q
} iUl{_vb
XFBk:~}sI
private int size=0; /$q;-/DnTZ
YQ?|Vb U
private int[] queue; gg8T],s1!a
W#??fae
public int get() { 3bPVKsY
return queue[1]; JgK?j&!hs:
} dQizM^j
rj{'X /
public void remove() { hO(HwG?8t
SortUtil.swap(queue,1,size--); DJ<e=F!
fixDown(1); kXG+zsT
} ^,`Lt *
file://fixdown OU{PVF={
private void fixDown(int k) { 6^ KDc
int j; Xi0/Wb h\
while ((j = k << 1) <= size) { XK&#K? M
if (j < size %26amp;%26amp; queue[j] j++; >EMCG.**
if (queue[k]>queue[j]) file://不用交换 %:oGyV7a
break; mexI}
SortUtil.swap(queue,j,k); h]'fX
k = j; v4Nb/Y
} dxASU|Yo9
} TyK; q{
private void fixUp(int k) { 6J=~*&
while (k > 1) { fA+M/}=
int j = k >> 1; j*6!7u.,K
if (queue[j]>queue[k]) R6M@pO
break; ]|732Z
SortUtil.swap(queue,j,k); B8IfE`
k = j; ~ 4&_$e!
} +rql7D0st
} mCq*@1Lp9
bH,Jddc
} Je?V']lm
uAJ_`o[
} C-2n2OM.
~" $9auQtC
SortUtil： ,fYO>l';`f
bz>#}P=58G
package org.rut.util.algorithm; 4/d#)6
7l:H~"9r
import org.rut.util.algorithm.support.BubbleSort; DPe`C%Oc1
import org.rut.util.algorithm.support.HeapSort; >U) ,^H(
import org.rut.util.algorithm.support.ImprovedMergeSort; (+Uo;)~!YC
import org.rut.util.algorithm.support.ImprovedQuickSort; o/&:w z
import org.rut.util.algorithm.support.InsertSort; r[\47cG
import org.rut.util.algorithm.support.MergeSort; 6=H-H\iw
import org.rut.util.algorithm.support.QuickSort; x3WY26e
import org.rut.util.algorithm.support.SelectionSort; huR<+ =!
import org.rut.util.algorithm.support.ShellSort; B1p9pr
Q!|71{5U
/** / Sp+MB9
* @author treeroot ;M JM~\L0
* @since 2006-2-2 1}'Jbj"/
* @version 1.0 QeQbO
*/ X5<L
public class SortUtil { bqLv81V
public final static int INSERT = 1; :m+:%keK
public final static int BUBBLE = 2; ]_-$
public final static int SELECTION = 3; &V2G<gm0
public final static int SHELL = 4; Z1OcGRN!
public final static int QUICK = 5; gr-%9=Uq
public final static int IMPROVED_QUICK = 6; |]B]0J#_
public final static int MERGE = 7; ?9PNCd3$d
public final static int IMPROVED_MERGE = 8; k}<mmKB
public final static int HEAP = 9; U O[p
m<076O4|`
public static void sort(int[] data) { hA~}6Qn
sort(data, IMPROVED_QUICK); D@Wm-
} KztF#[64W^
private static String[] name={ lL83LhE}<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PB9<jj;
}; @B[=`9KF[
m1`ln5(R
private static Sort[] impl=new Sort[]{ "/\:Fdc^
new InsertSort(), g6*}&.&
new BubbleSort(), hpw;w}m
new SelectionSort(), Gge"`AT
new ShellSort(), Uz62!)
new QuickSort(), /_56H?w\
new ImprovedQuickSort(), +nqOP3
new MergeSort(), 2 na8G
new ImprovedMergeSort(), H?B.Hp|
new HeapSort() JE?XZp@V
}; h knobk
FEP\5d>
public static String toString(int algorithm){ ph|3M<q6
return name[algorithm-1]; ) .]Z}g&
} 4mPg; n
*/S,CV
public static void sort(int[] data, int algorithm) { 1`)R#$h
impl[algorithm-1].sort(data); * dNMnZ@Y
} ,Y&kW'2
=lffr?#&B
public static interface Sort { 0u0Hl%nl
public void sort(int[] data); 2s(K4~ee
} !-7(.i-
[Q%3=pm_
public static void swap(int[] data, int i, int j) { {<|0M%v
int temp = data; ?pVODnP k
data = data[j]; > h:~*g
data[j] = temp; MZ+"Arzb
} $MR{3-
} }wUF#