[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; ZDkD%SCy
} rE{Xo:Cf
int i1=l; CVSsB:H6e
int i2=mid+1; s@)"IdSA(
for(int cur=l;cur<=r;cur++){ EfBVu
if(i1==mid+1) !k= 0X\5L
data[cur]=temp[i2++]; azDC'.3{p
else if(i2>r) ^Im%D(MY
data[cur]=temp[i1++]; uJ/?+5TU
else if(temp[i1] data[cur]=temp[i1++]; 5ih"Nds[H
else !ga(L3vf
data[cur]=temp[i2++]; Z(k\J|&9C
} jle%|8m&@
} ci_v7Jnwo
Bpm5dT;
} 51ajE2+X&
U_}A{bFG
改进后的归并排序: sAD P~xvU
K)Xs L
package org.rut.util.algorithm.support; W]yClx \
_]D#)-uv}C
import org.rut.util.algorithm.SortUtil; ;4/dk_~p]
D"x$^6`c}
/** F@K*T2uh
* @author treeroot ? __aVQ7
* @since 2006-2-2 d7_g u
* @version 1.0 0n<(*bfW
*/ w^dueP7J
public class ImprovedMergeSort implements SortUtil.Sort { $uFh$f
Q{l*62Bx
private static final int THRESHOLD = 10; v<7Gln
D _bkUR1
/* +{C9uY)$vf
* (non-Javadoc) #[U9(44,
* >\?z37:T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yf!*OGF
*/ eb.cq"C
public void sort(int[] data) { @( n^S?(
int[] temp=new int[data.length]; 16[-3cJ T
mergeSort(data,temp,0,data.length-1); :B*vkwT
} ^QXw[th!d
pe!dm}!h[
private void mergeSort(int[] data, int[] temp, int l, int r) { e\A(#l@g
int i, j, k; 2%{YYT
int mid = (l + r) / 2; GIRSoRVsh
if (l == r) /J[H5uA
return; =,AC%S_D~
if ((mid - l) >= THRESHOLD) orB8Q\p'
mergeSort(data, temp, l, mid); KCJN<
else ?9(o*lp
insertSort(data, l, mid - l + 1); ;X$q#qzN#
if ((r - mid) > THRESHOLD) o/dMm:TF
mergeSort(data, temp, mid + 1, r); W) 33;E/}
else W<rTq0~$?
insertSort(data, mid + 1, r - mid); $@_<$t
G+hF [b44'
for (i = l; i <= mid; i++) { Q_QKm0!
temp = data; $/, BJ/9
} Y[iDX#
for (j = 1; j <= r - mid; j++) { )H;pGM:
temp[r - j + 1] = data[j + mid]; C?w<$DU
} &$b\=
int a = temp[l]; TDAWI_83-
int b = temp[r]; .B 85!lCF
for (i = l, j = r, k = l; k <= r; k++) { P>{US1t
if (a < b) { $c@w$2
data[k] = temp[i++]; 83 i1
a = temp; Z@uTkqG)
} else { %qS]NC
data[k] = temp[j--]; bSrRsgKvT
b = temp[j]; B=Zl&1
} lJ:M^.Em0
} d`9W
} pwFU2}I
FpdDIa
/** ]3O 4\o
* @param data Wa[x`:cT?u
* @param l VDByj "%
* @param i atLV`U&t
*/ e}'#Xv
private void insertSort(int[] data, int start, int len) { ^])e[RN7?n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zd*3R+>U'>
} $N}/1R^?r
} tjZ\h=
} Gh]_L+
} i\=z'
x7P([^i
堆排序： Sc1+(z
> $w^%I
package org.rut.util.algorithm.support; Q;$ 9qOF
W NwJM
import org.rut.util.algorithm.SortUtil; s;fVnaqG:
w~kHQ%A
/** )\T@W
* @author treeroot $^W-Wmsz
* @since 2006-2-2 x],8yR)R
* @version 1.0 [!1)mR
*/ Fw_ (q!
public class HeapSort implements SortUtil.Sort{ KqM!!
May&@x/oMS
/* (non-Javadoc) ^Yj"RM$;N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q'Jv}'eK_
*/ Ni2]6U
public void sort(int[] data) { 9z5"y|$
MaxHeap h=new MaxHeap(); {8^Gs^c c
h.init(data); `6a]|7|f
for(int i=0;i h.remove(); lpl8h4d
System.arraycopy(h.queue,1,data,0,data.length); v!NB~"LQ
} xn(+G$m
b!i`o%Vb
private static class MaxHeap{ e#>tM
c%|vUAq*
void init(int[] data){ cI*KRCU
this.queue=new int[data.length+1]; )Vwj9WD
for(int i=0;i queue[++size]=data; S5i+vUI8C
fixUp(size); _Ry_K3K
} %&^Q(f
} R<f#r03@|
|h5kg<Zgo
private int size=0; OSp?okV
9pWi.J
private int[] queue; Wgxn`6
9<xTu>7J
public int get() { +"]oc{W!
return queue[1]; Zxg1M
} `kv1@aQPL
eYJ{LPo
public void remove() { m)s xotgXf
SortUtil.swap(queue,1,size--); <"*"1(wN
fixDown(1); ZhH+D`9
} hVMYB_<~
file://fixdown X?tj$
private void fixDown(int k) { o_iEkn
int j; +"'F Be
while ((j = k << 1) <= size) { tf4*R_6;1$
if (j < size %26amp;%26amp; queue[j] j++; ecn}iN
if (queue[k]>queue[j]) file://不用交换 :/+>e IE
break; G49Ng|qn
SortUtil.swap(queue,j,k); )T>8XCL\}
k = j; 82lr4
} \X&]FZ(*
} <5dH *K
private void fixUp(int k) { x+4vss
while (k > 1) { iJ}2"i7M
int j = k >> 1; m&Lt6_vi
if (queue[j]>queue[k]) Z.!g9fi8>
break; HtxLMzgz<<
SortUtil.swap(queue,j,k); Osnyd+dJY
k = j; ya:sW5fk
} cv3L&zg M
} 3 h#s([uL
aiYo8+{!#
} kEO1TS
7'Lp8
} aC`Li^
}/20%fP
SortUtil： y =R aJm
NdZ)[f:2
package org.rut.util.algorithm; 0f1H8zV
P*0f~eu
import org.rut.util.algorithm.support.BubbleSort; `%|u!
import org.rut.util.algorithm.support.HeapSort; *xPB<v2N:P
import org.rut.util.algorithm.support.ImprovedMergeSort; ugno]5Ni
import org.rut.util.algorithm.support.ImprovedQuickSort; ;v_ls)_,-
import org.rut.util.algorithm.support.InsertSort; */nuv k
import org.rut.util.algorithm.support.MergeSort; dgXg kB'
import org.rut.util.algorithm.support.QuickSort; ]GNh)
import org.rut.util.algorithm.support.SelectionSort; I-,>DLG
import org.rut.util.algorithm.support.ShellSort; D}MoNE[r
ozU2
/** TM0b-W (H
* @author treeroot *|oPxQCtK
* @since 2006-2-2 F=srkw:*.
* @version 1.0 Vc|NL^
*/ *%X.ym'
public class SortUtil { T8U[xu.>
public final static int INSERT = 1; ^uhxURF
public final static int BUBBLE = 2; S/VA~,KCe;
public final static int SELECTION = 3; Q\|18wkW
public final static int SHELL = 4; 6J\q`q(W(
public final static int QUICK = 5; \7yJ\I
public final static int IMPROVED_QUICK = 6; #pX8{Tf[
public final static int MERGE = 7; v;Es^ YI
public final static int IMPROVED_MERGE = 8; WHP;Neb6
public final static int HEAP = 9; RK-x?ZYH'
Hq?&Qo
public static void sort(int[] data) { yxvjg\!&
sort(data, IMPROVED_QUICK); PcB{=L
} `NQ{)N0!
private static String[] name={ ijFV<P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zj{(p Z1
}; I0iY+@^5
_lP4}9p
private static Sort[] impl=new Sort[]{ 7,h3V=^)Q
new InsertSort(), Qwv '<
new BubbleSort(), 9\AS@SH{^T
new SelectionSort(), wlrIgn%
new ShellSort(), *Rq`*D>:U}
new QuickSort(), zka?cOmYF[
new ImprovedQuickSort(), ^sV|ck
new MergeSort(), .Vmtx
new ImprovedMergeSort(), +8f>^*:u
new HeapSort() 2 5Q+1
}; @V$I?iXV
&$F[/[Ds+
public static String toString(int algorithm){ -D#5o,]3
return name[algorithm-1]; T%kKVr
} ")ED)&e
9`BEi(z
public static void sort(int[] data, int algorithm) { &\k?xN
impl[algorithm-1].sort(data); %K?iNe
} .fEwk
Ukc'?p,*
public static interface Sort { jn$j^51`C
public void sort(int[] data); wWTQ6~Y%d
} '0RRFO
Ff<)4`J
public static void swap(int[] data, int i, int j) { B'p5M.6d#:
int temp = data; b66R}=P l
data = data[j]; [/OQyb4F<
data[j] = temp; ,]7XMU3
} &2{]hRM
} c|lU(Tf