[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; 7H %>\^A^
} # 4L[8(+V
int i1=l; q okgu$2
int i2=mid+1; L Me{5H
for(int cur=l;cur<=r;cur++){ =rMT1
if(i1==mid+1) nm_]2z O
data[cur]=temp[i2++]; (i^{\zv
else if(i2>r) xlZ"F
data[cur]=temp[i1++]; ?4P*,c
else if(temp[i1] data[cur]=temp[i1++]; pQKR
else #HfvY}[o
data[cur]=temp[i2++]; @7e h/|Y,
} ?suNA
} ]v{f!r=}
;!v2kVuS]
} R'`q0MoN1
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改进后的归并排序: $e)d!m.
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package org.rut.util.algorithm.support; ~Pq1@N>n
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import org.rut.util.algorithm.SortUtil; J\^ZRu_K
33z)F
/** ^1sX22k
* @author treeroot R@N I
* @since 2006-2-2 D6=Z%h\*
* @version 1.0 L0H;y6&
*/ F[BJhN*]a
public class ImprovedMergeSort implements SortUtil.Sort { $1y8gm
B&ItA76
private static final int THRESHOLD = 10; $T.we+u
<csz4tL}P
/* |2z?8lx
* (non-Javadoc) mtu/kd'(
* {EE/3e@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7p}J]!Z
*/ CZe0kH^:{
public void sort(int[] data) { RY3ANEu+
int[] temp=new int[data.length]; Vf9PHHH|
mergeSort(data,temp,0,data.length-1); %5Hsd
} \ 'G%%%;4
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private void mergeSort(int[] data, int[] temp, int l, int r) { 0*^ J;QGE
int i, j, k; i`U:uwW`
int mid = (l + r) / 2; C8 9c2
if (l == r) 1BO$xq
return; = _X#JP79
if ((mid - l) >= THRESHOLD) :34]}`-
mergeSort(data, temp, l, mid); `?r]OVe{y
else _H@Y%"ZHJ6
insertSort(data, l, mid - l + 1); ,#:*dl
if ((r - mid) > THRESHOLD) 6;6a.iZ
mergeSort(data, temp, mid + 1, r); v6(Yz[
else 5G"LuA
insertSort(data, mid + 1, r - mid); +RWP;rk
HI)MBrj;r
for (i = l; i <= mid; i++) { 4+2XPaIm
temp = data; {\3k(NdEX
} /I&Hq7SW`
for (j = 1; j <= r - mid; j++) { `B'*ln'r5
temp[r - j + 1] = data[j + mid]; $8zsqd 4?
} K=T]@ix$
int a = temp[l]; &~gqEl6RF
int b = temp[r]; ^L#\z7
for (i = l, j = r, k = l; k <= r; k++) { WJ":BK{NM
if (a < b) { U+:oy:mz
data[k] = temp[i++]; QFt7L
a = temp; 4gbi?UAmX
} else { 9c9FC
data[k] = temp[j--]; BNns#Q8a
b = temp[j]; =%P'?(o|
} acr@erk
} AT Dm$ *
} U ?'$E\
E`s9SE
/** Rj6:.KEJ
* @param data GPlAQk
* @param l :?W {vV
* @param i OjO$.ecT
*/ hd{Vz{;W
private void insertSort(int[] data, int start, int len) { ?|!167/O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7xz~%xC.
} 9QE|p
} #vh1QV!Ho
} #!V [(/
} =5=D)x~
uis;S)+
堆排序： Pl^-]~
Y*nzOD$
package org.rut.util.algorithm.support; 4bXAA9"
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import org.rut.util.algorithm.SortUtil; B~zP!^m
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/** HgL*/d
* @author treeroot $T7hY$2Ql
* @since 2006-2-2 bU'{U0lM
* @version 1.0 {.F``2
*/ D~_|`D5WK
public class HeapSort implements SortUtil.Sort{ `s74g0h
kB_uU !G
/* (non-Javadoc) ]=ar&1}J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .C=&`;Vs
*/ Y^5X>
public void sort(int[] data) { kcT?<r
MaxHeap h=new MaxHeap(); \%\b*OO
h.init(data); 4 4%jz-m
for(int i=0;i h.remove(); k#"Pv"
System.arraycopy(h.queue,1,data,0,data.length); Ij;=
} V"":_`1VW
JmN,:bI
private static class MaxHeap{ DF D5">g@
fq-$u;~h
void init(int[] data){ 63:0Vt>hZ^
this.queue=new int[data.length+1]; !g:UkU\J
for(int i=0;i queue[++size]=data; mw}obblR
fixUp(size); JHpoW}7QB
} pL`snVz
} ONQp-$
KI(9TI*
private int size=0; xR+=F1y
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private int[] queue; Ht^MY
=w&%29BYq
public int get() { [{3WHS.
return queue[1]; <()xO(
} $s2Ty1
etF?,^)h=g
public void remove() { \ZrLh,6f.
SortUtil.swap(queue,1,size--); ~N+lI\K
fixDown(1); /Z<"6g?
} Dz,Fu:)
file://fixdown .N~qpynY
private void fixDown(int k) { a(CZGIB
int j; p'{ `Uvr
while ((j = k << 1) <= size) { $t5 0<1
if (j < size %26amp;%26amp; queue[j] j++; G3QB Rh{
if (queue[k]>queue[j]) file://不用交换 Q"c!%`\
break; -eAo3
SortUtil.swap(queue,j,k); L^PZ\OC
k = j; q|m8G
} 9R.IYnq
} (?-5p;
private void fixUp(int k) { wqo2iRql
while (k > 1) { ?QO)b9
int j = k >> 1; Re?sopg0r
if (queue[j]>queue[k]) 20gPx;
break; YN4P >d
SortUtil.swap(queue,j,k); 2cfzLW(
k = j; ]7kq@o/7
} ;cZ9C 1
} jeb<qi>
F=
} |E@Gsw
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} 6 .DJRY
.UbmU^y|
SortUtil： vj0`[X
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package org.rut.util.algorithm; /1++ 8=
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import org.rut.util.algorithm.support.BubbleSort; 0O4'Ts ?
import org.rut.util.algorithm.support.HeapSort; 9m56oT'U{
import org.rut.util.algorithm.support.ImprovedMergeSort; "hz(A.THi
import org.rut.util.algorithm.support.ImprovedQuickSort; s<0yQ-=.?N
import org.rut.util.algorithm.support.InsertSort; Vja' :i
import org.rut.util.algorithm.support.MergeSort; FVLXq0<Cj
import org.rut.util.algorithm.support.QuickSort; L]0+u\(
import org.rut.util.algorithm.support.SelectionSort; IDBhhv3ak
import org.rut.util.algorithm.support.ShellSort; +AyQ4Q(-o
xMg&>}5
/** MnFem $ @
* @author treeroot b0LjNO@<
* @since 2006-2-2 OB3AZH$
* @version 1.0 ,G1|] ~
*/ q,d]i/T
public class SortUtil { "Gcr1$xG8!
public final static int INSERT = 1; i2b\` 805
public final static int BUBBLE = 2; ;nj'C1
public final static int SELECTION = 3; ~bT0gIc
public final static int SHELL = 4; hXS'*vO"
public final static int QUICK = 5; bf3LNV|
public final static int IMPROVED_QUICK = 6; "n '*_rh>+
public final static int MERGE = 7; G/(oQA
public final static int IMPROVED_MERGE = 8; fT._Os?i
public final static int HEAP = 9; ,IuO;UV#)
YkPz ~;
public static void sort(int[] data) { Y'/`?CK
sort(data, IMPROVED_QUICK); .^#{rk
} 'N='B<^;%
private static String[] name={ eFXxkWR)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -a3+C,I8g
}; fh$U"
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private static Sort[] impl=new Sort[]{ a[s%2>e
new InsertSort(), 3]'=s>UO>^
new BubbleSort(), ni@D7:h
new SelectionSort(), .5L/<
new ShellSort(), s5|LD'o!
new QuickSort(), w;H
new ImprovedQuickSort(), : ` F>B
new MergeSort(), eHv~?b5l
new ImprovedMergeSort(), psRm*,*O
new HeapSort() y5a^xRDw
}; EN.yU!N.4
lGG1d
public static String toString(int algorithm){ g/+M&k$
return name[algorithm-1]; l@1f L%f
} sLbz@54
toTAWT D
public static void sort(int[] data, int algorithm) { xx;'WL,g
impl[algorithm-1].sort(data); 6z%3l7#7Yi
} %n}fkj'
Vu`dEvL?
public static interface Sort { R$,`}@VqZ3
public void sort(int[] data); nq/xD;q
} rA*,)I_v@
AG}' W
public static void swap(int[] data, int i, int j) { ZM;EjS1
int temp = data; [$[t.m
data = data[j]; Xki/5roCQ|
data[j] = temp; (/"T=`3t
} .[cT3l/t
} .U5+PQN