[JAVA]用Java实现的各种排序

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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; B[Tw0rQ
} 8..itty
int i1=l; HFf| >&c&
int i2=mid+1; c shZR(b
for(int cur=l;cur<=r;cur++){ H%/$Rqg
if(i1==mid+1) HL_MuyE
data[cur]=temp[i2++]; W58\V
else if(i2>r) eR3!P8t
data[cur]=temp[i1++]; S4tdWA
else if(temp[i1] data[cur]=temp[i1++]; U2K>\/-~
else |_ ;-~bmb
data[cur]=temp[i2++]; CqF< BE
} !>! l=Z
} aoCyYnZD
Xe* L^8+
} "cti(0F-d
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改进后的归并排序: ,;{mH]"s
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package org.rut.util.algorithm.support; A]>0lB
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import org.rut.util.algorithm.SortUtil; yyZjMnuD
=b;v:HC
/** rb9x||
* @author treeroot ()P?fed
* @since 2006-2-2 2sf/^XC1
* @version 1.0 c !5OK4+Z
*/ v1;`.PWD
public class ImprovedMergeSort implements SortUtil.Sort { fPspJug
3J@#V '
private static final int THRESHOLD = 10; o{:D
6KV&E8Gn
/* ?Bk"3{hl
* (non-Javadoc) }G-qOt
* `< VoZ/v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #opFUX-
*/ cDLS)
public void sort(int[] data) { t6j(9[gGq
int[] temp=new int[data.length]; N>@AsI
mergeSort(data,temp,0,data.length-1); `oq 3G }
} bu\,2t}B
VP|9Cm=Fg
private void mergeSort(int[] data, int[] temp, int l, int r) { }!B<MGBd
int i, j, k; )%)?M *
int mid = (l + r) / 2; l=kgRh
if (l == r) 0PTB3-
return; _Z2VS"yH
if ((mid - l) >= THRESHOLD) CK.Z-_M
mergeSort(data, temp, l, mid); ^W'\8L
else W"z!sf5U
insertSort(data, l, mid - l + 1); _:=w6jCk
if ((r - mid) > THRESHOLD) 9;q@;)'5
mergeSort(data, temp, mid + 1, r); E-&=I> B5
else S[*e K Z
insertSort(data, mid + 1, r - mid); ?^k-)V
hC~lH eH
for (i = l; i <= mid; i++) { $zDW)%nAX
temp = data; #&&^5r-b-
} 3\6jzD
for (j = 1; j <= r - mid; j++) { K2)),_,@5+
temp[r - j + 1] = data[j + mid]; >WG$!o+R
} ~vG~Z*F
int a = temp[l]; 6rdm=8WFA
int b = temp[r]; !MQo=k
for (i = l, j = r, k = l; k <= r; k++) { %z1WdiC
if (a < b) { nwW`Q>+#U
data[k] = temp[i++]; YdIV_&-W
a = temp; 7?B]X%
} else { L +-B,466
data[k] = temp[j--]; T4._S:~
b = temp[j]; #jK{)%}mA
} fE7[Sk
} HL*jRl
} 7&OU!gp
tUL(1:-C
/** ;nSaZ$`5
* @param data .2Gn)dZU
* @param l c tTbvXP
* @param i a&4>xZU #
*/ rOH8W
private void insertSort(int[] data, int start, int len) { O*!+D-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8[ :FU
} aFd ,
} 0;r+E*`DA
} X~%Wg*Hm
} 2'_Oi-&
f4]nz:2
堆排序： LYv+Sv
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package org.rut.util.algorithm.support; A0o6-M]'0
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import org.rut.util.algorithm.SortUtil; w%j 6zsTz
~@MIG
/** N]}L*o&
* @author treeroot .\LWV=B
* @since 2006-2-2 ?cowey\m .
* @version 1.0 (\,mA-%E
*/ ]:Ocu--
public class HeapSort implements SortUtil.Sort{ Y#3m|b45n
NNb17=q_v
/* (non-Javadoc) o#Rao#bD:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k7f[aM5]
*/ ayHI(4!$j
public void sort(int[] data) { }a-ikFQ]
MaxHeap h=new MaxHeap(); 5{[3I|m{
h.init(data); \D>'
for(int i=0;i h.remove(); b{(!Ls_ &
System.arraycopy(h.queue,1,data,0,data.length); Su-LZ'C\
} OA&NWAm4
ps_CQh0
private static class MaxHeap{ h9&<-k
,TeDJ\k
void init(int[] data){ BDD^*Y
this.queue=new int[data.length+1]; 82efqzT
for(int i=0;i queue[++size]=data; qeH#c=DQ
fixUp(size); ir3iW*5k
} g}L2\i688
} 6@; w%Ea
DTAEfs!ZW
private int size=0; LHR%dt|M
?)5}v4b
private int[] queue; RkP7}ZA;
H /*^$>0Uo
public int get() { mzfj!0zR*
return queue[1]; FV!
} S'B7C>i`#N
/,c9&it(M
public void remove() { O#CxS/M5
SortUtil.swap(queue,1,size--); 3Akb|r
fixDown(1); Z!^iPB0~D
} }NiJDs
file://fixdown ) l0=jb
private void fixDown(int k) { ].7)^
int j; lf[(
while ((j = k << 1) <= size) { }7wQFKME
if (j < size %26amp;%26amp; queue[j] j++; *.ZV.(
if (queue[k]>queue[j]) file://不用交换 )I$_wB!UV
break; /$/\$f$
SortUtil.swap(queue,j,k); GriL< =?t
k = j; kplyZ
} 3:dQN;=
} qwiM.b5
private void fixUp(int k) { 0_,V}
while (k > 1) { pU<->d;->
int j = k >> 1; r#d~($[93
if (queue[j]>queue[k]) OI::0KOv
break; QU8?/
SortUtil.swap(queue,j,k); DLJu%5F
k = j; `?2S4lN/
} +'y$XR~W{
} `+Wl fk;
eiJ $}\qJL
} GyRU/0'BME
yLipuMNV
} <Mxy&9}ic
{[NBTT9&
SortUtil： Ycn*aR2
gM^ Hs7o,
package org.rut.util.algorithm; _LCK|H%v'
bt-y6,> +E
import org.rut.util.algorithm.support.BubbleSort; j@&F[r
import org.rut.util.algorithm.support.HeapSort; 9p9:nx\
import org.rut.util.algorithm.support.ImprovedMergeSort; [8l8m6
import org.rut.util.algorithm.support.ImprovedQuickSort; " q0lh
import org.rut.util.algorithm.support.InsertSort; Rm&i"
import org.rut.util.algorithm.support.MergeSort; rB< UOe
import org.rut.util.algorithm.support.QuickSort; |z-A;uL<
import org.rut.util.algorithm.support.SelectionSort; 3tA6r
import org.rut.util.algorithm.support.ShellSort; z|<6y~5,
1<Qb"FN!2
/** ri.;&
* @author treeroot ApG_Gd.
* @since 2006-2-2 Pz:,q~
* @version 1.0 18zv]v %
*/ ovvR{MTc
public class SortUtil { g-bHf]'
public final static int INSERT = 1; qa.nm4"6+
public final static int BUBBLE = 2; Xt_8=Q
public final static int SELECTION = 3; f)Z$,&
public final static int SHELL = 4; ^"(CZvq
public final static int QUICK = 5; %}J[EV
public final static int IMPROVED_QUICK = 6; J4;w9[a$
public final static int MERGE = 7; l#Ipo5=
public final static int IMPROVED_MERGE = 8; xVfAlN37(
public final static int HEAP = 9; -B*= V
x&@. [FJhO
public static void sort(int[] data) { [U5[;BNRD
sort(data, IMPROVED_QUICK); wa\Yc,R
} qRZv[T%*Q
private static String[] name={ mCb(B48]%X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "3(""0Q
}; SIYBMe
#^|y0:
private static Sort[] impl=new Sort[]{ EZ:pcnL{
new InsertSort(), HIsIW%B
new BubbleSort(), GL-v</2'U
new SelectionSort(), Tvqq#;I
new ShellSort(), {p[{5k 0
new QuickSort(), c@7d4Jz
new ImprovedQuickSort(), zo6|1xq
new MergeSort(), v[{g"C
new ImprovedMergeSort(), m!Cvd9X=
new HeapSort() lqe|1vN
}; H=RzY-\a%
e=Ko4Ao2y
public static String toString(int algorithm){ 6?$yBu9l
return name[algorithm-1]; 1y'8bt~7Pf
} )eIC5>#.
;-sZaU;
public static void sort(int[] data, int algorithm) { "jV:L
impl[algorithm-1].sort(data); IJa6W`}
} q)te/J@
'2Q[g0VR
public static interface Sort { K)b@,/5
public void sort(int[] data); A0X'|4I
} JYbsta
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public static void swap(int[] data, int i, int j) { f#mNx
int temp = data; :j^IXZW
data = data[j]; y_mTO4\C2
data[j] = temp; ^Gi9&fS,
} corNw+|/w
} Y*VF1M,2_