[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; _@?]!J[
} mI0|lp 1$
int i1=l; ks(PH6:]<
int i2=mid+1; pSV 8!
for(int cur=l;cur<=r;cur++){ z81I2?v[Jr
if(i1==mid+1) BtU,1`El5
data[cur]=temp[i2++]; r~t&;yRv
else if(i2>r) 4XX21<yn
data[cur]=temp[i1++]; M7jDV|Go
else if(temp[i1] data[cur]=temp[i1++]; R8":1 #&
else mN@0lfk;
data[cur]=temp[i2++]; :*}tkr4&eh
} c{FvMV2em
} >A2& Mjo
Ge(r6"%7
} P d*}0a~
B<:i[~`7t
改进后的归并排序: b!7"drge:
2uiiTg>
package org.rut.util.algorithm.support; xu& v(C9
]*):2%f
import org.rut.util.algorithm.SortUtil; H(?z?2b p
u@==Ut
/** !aLByMA
* @author treeroot \ZCc~muR
* @since 2006-2-2 )o9CFhFB
* @version 1.0 ap;*qiNFQ
*/ i$%;z~#wW
public class ImprovedMergeSort implements SortUtil.Sort { (Ca\$p7/
T3M 4r|
private static final int THRESHOLD = 10; K")-P9I6-f
Jc{zi^)(EN
/* 8)R)h/E>
* (non-Javadoc) (">!vz
* sjShm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %9Ulgs8=
*/ 9J2%9,^
public void sort(int[] data) { C_'Ug
int[] temp=new int[data.length]; 9W'#4
mergeSort(data,temp,0,data.length-1); 3z~zcQ^\
} /\#qz.c2K
o Q{gh$6*
private void mergeSort(int[] data, int[] temp, int l, int r) { 9D8el}uHf
int i, j, k; ;y"E}h
int mid = (l + r) / 2; 2"V?+Hhz
if (l == r) #c?\(qjWA
return; eDTEy;^o
if ((mid - l) >= THRESHOLD) eZP"M6
mergeSort(data, temp, l, mid); ';b/D
else (qB$I\
insertSort(data, l, mid - l + 1); QdDdrR^&
if ((r - mid) > THRESHOLD) 8iX?4qj{P
mergeSort(data, temp, mid + 1, r); PPE:@!u<
else ,JVD ;u
insertSort(data, mid + 1, r - mid); }\l5|Ft[!
QD"V=}'?
for (i = l; i <= mid; i++) { Q@]#fW\Y
temp = data; M%9PVePOe
} k}jH
for (j = 1; j <= r - mid; j++) { ~rn82an@G
temp[r - j + 1] = data[j + mid]; )G*Hl^Z;4
} eJ7A.O
int a = temp[l]; 3n6_yK+D
int b = temp[r]; *h-nI=
for (i = l, j = r, k = l; k <= r; k++) { W.0dGUi*
if (a < b) { tQ=U22&7
data[k] = temp[i++]; Gi;eDrgj~
a = temp; }Qg9l|
} else { 4P2)fLmc
data[k] = temp[j--]; #( X4M{I
b = temp[j]; z,DEBRT+
} lza'l
} hiP^*5h
} -V4@BKI8
o*r\&!NIw
/** v?d~H`L
* @param data chfj|Ce]x
* @param l $ n 7dIE
* @param i $i~DUT(
*/ Pf@8C{I
private void insertSort(int[] data, int start, int len) { k[G?22t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Cww$ A %}
} _W?}%;
} ze,HNFg@>
} ,|T
} s(wbsRVP8
t;y>q
堆排序： . 6Bz48*
S ._9
package org.rut.util.algorithm.support; 7,Z%rqf\)
G}f.fRY
import org.rut.util.algorithm.SortUtil; H!oP!rzEo
y4M<L. RO
/** H>_%ZXL
* @author treeroot YSv\T '3
* @since 2006-2-2 bU_9GGG|
* @version 1.0 HjV83S;
*/ :K2N7?shA
public class HeapSort implements SortUtil.Sort{ Q1s`d?P/`
&t%ICz&3
/* (non-Javadoc) |\N[EM%.@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .c~;/@{
*/ j.ANBE96>
public void sort(int[] data) { 2r[Q$GPM<
MaxHeap h=new MaxHeap(); fqvA0"tv
h.init(data); N}\$i&Vi
for(int i=0;i h.remove(); 3go!P])
System.arraycopy(h.queue,1,data,0,data.length); yfuvU2nVH
} y;#p=,r
Isoqs(Oi
private static class MaxHeap{ <qHwY.
s u![ST(
void init(int[] data){ wIi(p5*
this.queue=new int[data.length+1]; m<"1*d~
for(int i=0;i queue[++size]=data; `2S%l,>)#
fixUp(size); M,cI0i
} MLa]s* ; d
} BflF*-s ^
bQ
private int size=0; u%h]k ,(E
|h6)p;`gc
private int[] queue; "kf7??Z
m,*t}j0 7
public int get() { 1Pn!{ bU3@
return queue[1]; ;~/
} o+6Y/6Xp@
vxbO>c
public void remove() { V-J\!CHX
SortUtil.swap(queue,1,size--); B.{0,bW?
fixDown(1); .hT^7|Jz[
} WY<ip<
file://fixdown <}i\fJX6
private void fixDown(int k) { Q"QrbU
int j; Cn+TcdHX
while ((j = k << 1) <= size) { =EV8~hMyqh
if (j < size %26amp;%26amp; queue[j] j++; I9tdr<
if (queue[k]>queue[j]) file://不用交换 qYbod+UX
break; ^#gGA_H
SortUtil.swap(queue,j,k); \n+`~< i
k = j; B>9D@fmzs
} bjD0y cB[
} Xo]FOJ5
private void fixUp(int k) { H(n_g QAX
while (k > 1) { 7J0PO}N
int j = k >> 1; s g6
if (queue[j]>queue[k]) S{fNeK
break; C7)].vUN
SortUtil.swap(queue,j,k); l^"gpO${K
k = j; Kd^ ._
} 9J l9\y9
} G0a UZCw
|urohua
} dR $@vDm
{Ivu"<`L3
} ~EX/IIa{
*:GoS?Ma
SortUtil： Yckl,g_
C]eb=rw$
package org.rut.util.algorithm; shP,-Vs#
#gi&pR'$
import org.rut.util.algorithm.support.BubbleSort; ydoCoD w
import org.rut.util.algorithm.support.HeapSort; u~a<Psp&|
import org.rut.util.algorithm.support.ImprovedMergeSort; 'nW:2(J
import org.rut.util.algorithm.support.ImprovedQuickSort; R},mq&f5
import org.rut.util.algorithm.support.InsertSort; 2b3x|9o8
import org.rut.util.algorithm.support.MergeSort; Hyc19|
import org.rut.util.algorithm.support.QuickSort; W)j/[
import org.rut.util.algorithm.support.SelectionSort; FDpNM\SR1l
import org.rut.util.algorithm.support.ShellSort; DAc jx:~
/z5j.TMs
/** kj+AsQC,
* @author treeroot umD .
* @since 2006-2-2 `[Z?&'CRQ
* @version 1.0 oh,Nu_!
*/ .VWH
public class SortUtil { S@T>u,t'
public final static int INSERT = 1; +gK7`:v4O*
public final static int BUBBLE = 2; dHd{9ftyF
public final static int SELECTION = 3; x!LUhX '
public final static int SHELL = 4; <fN?=u+
public final static int QUICK = 5; u3"F7 lJ
public final static int IMPROVED_QUICK = 6; X8?|5$Ey
public final static int MERGE = 7; 4sROMk=l
public final static int IMPROVED_MERGE = 8; [+ 1([#
public final static int HEAP = 9; 0'aZ*ozk
uXtfP?3Vy
public static void sort(int[] data) { =C5[75z#+
sort(data, IMPROVED_QUICK); [(UQQa=+
} uw;s](~E
private static String[] name={ H^'EY:|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .>h|e_E
}; ^VoQGP/cl
>;0z-;k6
private static Sort[] impl=new Sort[]{ 4[rD|
new InsertSort(), 9u"im+=:
new BubbleSort(), !4-NbtT
new SelectionSort(), Z`< +8e
new ShellSort(), _mFb+8C
new QuickSort(), 21w<8:Vg
new ImprovedQuickSort(), I"Y?vj9]
new MergeSort(), _khQ
new ImprovedMergeSort(), 7|"11^q
new HeapSort() D`,@EW].
}; C^l)n!fq
evtn/.kDR
public static String toString(int algorithm){ O`rrg~6#
return name[algorithm-1]; \/{qE hP
} S.M< (
jZ.+b j >
public static void sort(int[] data, int algorithm) { +ZGOv,l
impl[algorithm-1].sort(data); NE3G!qxL
} +.[#C5
gy~M]u{
public static interface Sort { :n>:*e@w%
public void sort(int[] data); r\_aux^z
} 'VR5>r
7.akp
public static void swap(int[] data, int i, int j) { )M^;6S
int temp = data; b]CJf8'u
data = data[j]; M`iJ6L
data[j] = temp; qfN<w&P
} vWzNsWPK"{
} PMkwY{.u