[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; mhX66R
} ^iBIp#
int i1=l; _'ebXrbZB
int i2=mid+1; /:Gy .
for(int cur=l;cur<=r;cur++){ ~".@;Q
if(i1==mid+1) Rzh.zvxTp
data[cur]=temp[i2++]; 9PACXW0
else if(i2>r) iF Mf[qBg
data[cur]=temp[i1++]; {l5fKVb\C
else if(temp[i1] data[cur]=temp[i1++]; HzKY2F(,
else Z~QLjv&$/r
data[cur]=temp[i2++]; L-:@Om!
} 4p-"1c$
} 9&uf
gpf0-g-X
} !H)-
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改进后的归并排序: uSRhIKy
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package org.rut.util.algorithm.support; a*LfT<hmU3
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import org.rut.util.algorithm.SortUtil; 3(\D.Z
rD4umWi
/** IQ_s]b;z
* @author treeroot Hnk&2bY
* @since 2006-2-2 }.&;NgZS
* @version 1.0 U-4F
*/ kyvl>I0q@
public class ImprovedMergeSort implements SortUtil.Sort { UWqD)6
Fz,jnV9=j
private static final int THRESHOLD = 10; d6'G 7'9
{4,],0bjx/
/* &Q;sbI}
* (non-Javadoc) P "IR3=
* ~gff{Nzk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @`C'tfG/4
*/ L;$>SLl,
public void sort(int[] data) { Gj-nTN
int[] temp=new int[data.length]; 1w(3!Ps+
mergeSort(data,temp,0,data.length-1); AQ@)'
} 'UWkJ2:!
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private void mergeSort(int[] data, int[] temp, int l, int r) { >8kXa.)84
int i, j, k; 6(d6Uwc`
int mid = (l + r) / 2; K_YOp1
if (l == r) Zs=A<[
return; o}114X4q;
if ((mid - l) >= THRESHOLD) ty.$H24
mergeSort(data, temp, l, mid); <MkvlLu((o
else bV&9>fC
insertSort(data, l, mid - l + 1); :R=6Ku>
if ((r - mid) > THRESHOLD) f%@~|:G:
mergeSort(data, temp, mid + 1, r); -Q@f),
else GIxs>E'X
insertSort(data, mid + 1, r - mid); ?@$xLUHR4
dGBjV #bNT
for (i = l; i <= mid; i++) { >x;\H(g
temp = data; FUI*nkZY
} hFv{?v
for (j = 1; j <= r - mid; j++) { *}lLV.+A
temp[r - j + 1] = data[j + mid]; b|Emu!9U
} i83~&Q=
int a = temp[l]; )/>BgXwH
int b = temp[r]; ;un@E:
for (i = l, j = r, k = l; k <= r; k++) { S \]O8#OX
if (a < b) { * &:_Vgu
data[k] = temp[i++]; )8W! |
a = temp; mW%8`$rVEO
} else { 2@6@|jRG
data[k] = temp[j--]; +:;ddV
b = temp[j]; F/5G~17
} FefroaJ:u
} w/m@(EBK
} J@I>m N1\
H575W"53
/** {V QGfN
* @param data :,JaOn'
* @param l r3g^0|)
* @param i PO"lY'W.U
*/ ,7&\jET5^0
private void insertSort(int[] data, int start, int len) { p!YK~cH[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .<`)`:n+B
} 1 6zxPSTr}
} (^}t
} S"h;u=5it
} '37 {$VHw
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堆排序： W|>jj$/o
iX+8!>Q
package org.rut.util.algorithm.support; c{/R?<
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import org.rut.util.algorithm.SortUtil; 3E|||3rf
d,(y$V+
/** hI86WP9*
* @author treeroot 7<^+)DsS?
* @since 2006-2-2 0#J~@1Gf
* @version 1.0 +QFKaS<sn
*/ 4@-tT;$
public class HeapSort implements SortUtil.Sort{ -pYmM d,
PF`uwx@zH
/* (non-Javadoc) -iDs:J4Iq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cpa" ,8
*/ EE 1D>I
public void sort(int[] data) { ML12&E>
MaxHeap h=new MaxHeap(); jum"T\
h.init(data); ]AY 4bm
for(int i=0;i h.remove(); TRi#
System.arraycopy(h.queue,1,data,0,data.length); , lR(5ZI
} *m"9F'(Sd
as:l1S
private static class MaxHeap{ Pw<?Dw]m
_VT{2`|})
void init(int[] data){ }gv'r ";
this.queue=new int[data.length+1]; 1$T`j2s
for(int i=0;i queue[++size]=data; }+KM"+@$<
fixUp(size); 4@0aN6Os
} s5@BVD'}E
} mKe6rEUs|
7He"IJ
private int size=0; XS&Pc
mw5>[
private int[] queue; %Y ZCdS
fYP,V0P
public int get() { _;PQt" ]
return queue[1]; $l7}e=1
} XE2Un1i}j1
|Gz<I
public void remove() { 0BC@wV
SortUtil.swap(queue,1,size--); |-=-/u1
fixDown(1); t`JT
} g4WmUV#wp
file://fixdown RkG?R3e
private void fixDown(int k) { >k"O3Pc@
int j; `?$-T5Rr
while ((j = k << 1) <= size) { Wmd@%K
if (j < size %26amp;%26amp; queue[j] j++; 0e8
if (queue[k]>queue[j]) file://不用交换 _K9PA[m5~
break; i<Ms2^
SortUtil.swap(queue,j,k); oi0O4J%H
k = j; HHx:s2G
} .$-;`&0cZ
} |2^mCL.r
private void fixUp(int k) { Gk5'|s
while (k > 1) { MlWKfe<
int j = k >> 1; _W(xO |,M
if (queue[j]>queue[k]) [6VM4l"
break; 6E) T;R(@
SortUtil.swap(queue,j,k); : _Y^o
k = j; oX)a6FXK>
} "T5jz#H#/
} h's[) t
|iJz[%
} Kc]cJ`P4.
g=D]=&H
} \)28,`
3)VO{Cj!
SortUtil： 2+pw%#fe
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package org.rut.util.algorithm; i-0 :Fs
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import org.rut.util.algorithm.support.BubbleSort; :c]y/lQmV
import org.rut.util.algorithm.support.HeapSort; 9ls1y=M8J
import org.rut.util.algorithm.support.ImprovedMergeSort; %u%;L+0Q[
import org.rut.util.algorithm.support.ImprovedQuickSort; > U3>I^Y
import org.rut.util.algorithm.support.InsertSort; Lb$Uba-_
import org.rut.util.algorithm.support.MergeSort; *}:P
import org.rut.util.algorithm.support.QuickSort; |u`YT;`!"-
import org.rut.util.algorithm.support.SelectionSort; !"phz&E5ah
import org.rut.util.algorithm.support.ShellSort; ,Z|O y|+'
7V=deYt_p
/** Nkb%4ofKqu
* @author treeroot N''xdz3Z
* @since 2006-2-2 * g+v*q X
* @version 1.0 Onqapm0
*/ mu0L_u(P
public class SortUtil { j*8Ze!^
public final static int INSERT = 1; Usht\<{
public final static int BUBBLE = 2; VKXi*F9
public final static int SELECTION = 3; 7]u_
public final static int SHELL = 4; 2FL_!;p;2E
public final static int QUICK = 5; ,%m~OB#
public final static int IMPROVED_QUICK = 6; f(}&8~&
public final static int MERGE = 7; DDIRJd<J
public final static int IMPROVED_MERGE = 8; ajRht+{
public final static int HEAP = 9; c5f57Z
fc:87ZR{K
public static void sort(int[] data) { B7A.~'=
sort(data, IMPROVED_QUICK); $m>( kd1
} ,f>^q"
private static String[] name={ 5Mxl({oI]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +:#g6(P]
}; r_ 9"^Er
aG"
private static Sort[] impl=new Sort[]{ o}36bi{
new InsertSort(), (q7;/n
new BubbleSort(), ]Gm&Kn>
new SelectionSort(), vRmzjd~
new ShellSort(), T}p|_)&y
new QuickSort(), brE%/%!e
new ImprovedQuickSort(), r+]a
new MergeSort(), |<]wM(GxE
new ImprovedMergeSort(), 'bji2#z[
new HeapSort() UHl1>(U
}; 2#`d:@r
@uxg;dyI~
public static String toString(int algorithm){ i+-=I+L3
return name[algorithm-1]; ^s8JW"H
} kYS\TMt,C
UA0R)BH'
public static void sort(int[] data, int algorithm) { N:^4OnVR
impl[algorithm-1].sort(data); ,({%t
} $H,9GIivD
GO#eI]>/r
public static interface Sort { &6Wim<*
public void sort(int[] data); H'2o84$
} 9zehwl]~
78mJ3/?rC
public static void swap(int[] data, int i, int j) { S@L%X<Vm
int temp = data; Q|Pm8{8
data = data[j]; a- /p/ I-%
data[j] = temp; d D^?%,a
} H,fVF837
} j~ qm5}