[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; FC.d]XA%/d
} ` aTkIo:ms
int i1=l; ]^,<Ez
int i2=mid+1; @=o1q=5@8
for(int cur=l;cur<=r;cur++){ Q9X7-\n
if(i1==mid+1) bSmF"H0cP
data[cur]=temp[i2++]; ,: X+NQ
else if(i2>r) /{pVYY
data[cur]=temp[i1++]; eto3dJ!R
else if(temp[i1] data[cur]=temp[i1++]; 9g3J{pKcZ
else ~YO-GX(
data[cur]=temp[i2++]; /60`"xH
} X+;F5b9z
} HA%%WSuf
6 W/S?F~{
} y=y=W5#;77
FoM4QO
改进后的归并排序: *ayn<Vlh`^
mQt';|X@
package org.rut.util.algorithm.support; k8^!5n
nOxCni~T
import org.rut.util.algorithm.SortUtil; aaq{9Y#
H!U\;ny
/** '| Enc"U
* @author treeroot <VD^f
* @since 2006-2-2 ?qr-t+
* @version 1.0 }J}a;P4
*/ c-z2[a8
public class ImprovedMergeSort implements SortUtil.Sort { qJQE|VM&
|B&KT
private static final int THRESHOLD = 10; &wRdUIc
$"[1yQ<p
/* P+pL2BA
* (non-Javadoc) O[Xl*9P
* X%W_cb2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )'8DK$.
*/ '$u3i #.\
public void sort(int[] data) { 6|U0"C#]
int[] temp=new int[data.length]; BCV<( @c
mergeSort(data,temp,0,data.length-1); dj*%^cI
} #*uSYGdc
IVD1mk
private void mergeSort(int[] data, int[] temp, int l, int r) { Q!/<=95E
int i, j, k; xlVQ[Mt
int mid = (l + r) / 2; Eq-fR~<9
if (l == r) grEmp9Q ?
return; lyiBRMiP|
if ((mid - l) >= THRESHOLD) 4fBgmL
mergeSort(data, temp, l, mid); Iu6KW:x
else |+Z, 7~!
insertSort(data, l, mid - l + 1); l c)*HYqU
if ((r - mid) > THRESHOLD) ^.Cfa
mergeSort(data, temp, mid + 1, r); X1U7$/t
else =jdO2MgSg*
insertSort(data, mid + 1, r - mid); ^,zE Nqg7
qq}EXq^
for (i = l; i <= mid; i++) { {<~0nLyJS
temp = data; vlCjh! x
} oXwoi!
for (j = 1; j <= r - mid; j++) { KNU/Kc#
temp[r - j + 1] = data[j + mid]; U#G[#sd> K
} $|.x!sA
int a = temp[l]; j"o`K}C
int b = temp[r]; J 2%^%5&0
for (i = l, j = r, k = l; k <= r; k++) { dDN#>|
if (a < b) { +7?p&-r)x
data[k] = temp[i++]; mfOr+
a = temp; v 1Yf:c
} else { /km^IH
data[k] = temp[j--]; s~Wjh7'
b = temp[j]; ,>CFw-Nxu
} B]dHMLzl
} \7Hzj0hSi
} "UVqkw,vt
DUf=\p6`f
/** m`C(y$8fU
* @param data \&]M \
* @param l =O~1L m;
* @param i 2%0zPflT
*/ v :]y#y
private void insertSort(int[] data, int start, int len) { ~/1kCZB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); flTK
} N8(xz-6
} E :*!an
} `+$'bNPn&
} LNml["
-xq)brG
堆排序： =zXpeo&|m
S!8eY `C.
package org.rut.util.algorithm.support; ~Kda#=
'5wa"/ ?w
import org.rut.util.algorithm.SortUtil; uRG0}>]|U
[P)'LY6F
/** #6'oor X
* @author treeroot qgrRH'
* @since 2006-2-2 {'Nvs_{6
* @version 1.0 `Bx3grZ 7&
*/ QQPbKok>
public class HeapSort implements SortUtil.Sort{ I z~#G6]M
a`(6hL3IT
/* (non-Javadoc) Woa5Ov!n0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x3>K{
*/ CF9a~^+%
public void sort(int[] data) { b!SGQv(^M
MaxHeap h=new MaxHeap(); Y2vzK;
h.init(data); qC?J`
for(int i=0;i h.remove(); ]O',Ei^
System.arraycopy(h.queue,1,data,0,data.length); QU16X
} P{5p'g ,
t,= ta{ a
private static class MaxHeap{ Z_F:H@-&
.:Bjs*
void init(int[] data){ wl2rw93
this.queue=new int[data.length+1]; /A\'_a|
for(int i=0;i queue[++size]=data; I<|)uK7
fixUp(size); (:2:_FL
} VaQ>g*(I
} ;%2/
m8$6FN
private int size=0; 7CYu"+Ea
&0SGAJlec
private int[] queue; UTKS<.q
,e( |,u
public int get() { S6,AY(V
return queue[1]; ;YNN)P%"
} \c>9f"jS_
eS fT+UL
public void remove() { C$oY,A,
SortUtil.swap(queue,1,size--); l_iucN
fixDown(1); 7^'TU=ss_
} '|&}rLr:+
file://fixdown w{)*'8oCB
private void fixDown(int k) { f!ehq\K1k
int j; 3 8pw
while ((j = k << 1) <= size) { m9Gyjr'L
if (j < size %26amp;%26amp; queue[j] j++; 2H;&E1:
if (queue[k]>queue[j]) file://不用交换 sp0&"&5
break; lxj_(Uo
SortUtil.swap(queue,j,k); nH}api^0A
k = j; @!fy24R]D
} 0#F3@/1h
} *D #H-]9
private void fixUp(int k) { A?|KA<&m#u
while (k > 1) { LSlaz
int j = k >> 1; x,IU]YW@
if (queue[j]>queue[k]) #rMMOu9r2
break; |xQG
SortUtil.swap(queue,j,k); :Gqyj_|<
k = j; 9=@j]g|
} [Ua4{3#
} *$/7;CLq
yw"FI!M
} >WE3$Q>bi
y/mxdPw
} G%S=K2v
+e<P7}ZQ
SortUtil： LdI)
iq,qf)BY.|
package org.rut.util.algorithm; w_@NT}
VE4!=4
import org.rut.util.algorithm.support.BubbleSort; ,=B "%=S
import org.rut.util.algorithm.support.HeapSort; \2-!%i,
import org.rut.util.algorithm.support.ImprovedMergeSort; kLMg|48fdI
import org.rut.util.algorithm.support.ImprovedQuickSort; }cgEC-
import org.rut.util.algorithm.support.InsertSort; )52:@=h*l
import org.rut.util.algorithm.support.MergeSort; )XMSQ ="m
import org.rut.util.algorithm.support.QuickSort; ps"crV-W
import org.rut.util.algorithm.support.SelectionSort; ,& =(DJ
import org.rut.util.algorithm.support.ShellSort; ;[0<QmeI!
AOWX=`J8V
/** 'Fo*h6=
* @author treeroot wfM$JYfI
* @since 2006-2-2 ~/Aw[>_;
* @version 1.0 ?'CIt5n+\{
*/ 5X\3y4
public class SortUtil { =+~e44!~D
public final static int INSERT = 1; 8NudY3cU!
public final static int BUBBLE = 2; 8HX(1nNj}
public final static int SELECTION = 3; sI/Hcm
public final static int SHELL = 4; wblEx/FqE^
public final static int QUICK = 5; 6(sqS~D
public final static int IMPROVED_QUICK = 6; eJilSFp1
public final static int MERGE = 7; x?KgEcnw2X
public final static int IMPROVED_MERGE = 8; Dk&cIZ43
public final static int HEAP = 9; Vi23pDZ5
~Lhq7;=H?O
public static void sort(int[] data) { TU$/3fp*
sort(data, IMPROVED_QUICK); ->6/L)
} zHG KPuk'
private static String[] name={ Wd_bDZQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OZ&J'Y
}; 24Z7;'
%Z 9<La
private static Sort[] impl=new Sort[]{ !e&ZhtTuC
new InsertSort(), `Q1S8i$
new BubbleSort(), ;{ XKZ}
new SelectionSort(), =`xk|86f
new ShellSort(), ]7O)iq%
new QuickSort(), ^)rX27!G
new ImprovedQuickSort(), <?&GBCe
new MergeSort(), Tc,Bv7:
new ImprovedMergeSort(), l^:m!SA_
new HeapSort() LVq3R 8A
}; 49nZWv48"_
gZ%B9i:
public static String toString(int algorithm){ ~KDx
return name[algorithm-1]; _2q4Aaza
} "BK'<j^q
Q mOG2
public static void sort(int[] data, int algorithm) { t]P[>{y
impl[algorithm-1].sort(data); ct3QtX0B
} Ym(^ih
'$ ~.x|
public static interface Sort { l2+qP{_4
public void sort(int[] data); 9b@L^]Kg
} gTY\B.
+G"=1sxJ
public static void swap(int[] data, int i, int j) { yrnB]$hf
int temp = data; pAtHU(}
data = data[j]; eU1= :n&&\
data[j] = temp; nj!)\U
} Op,Ce4A
} bENfEOf,