[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; FQWjL>NB
} UFB|IeX?q
int i1=l; V;SfW2`)
int i2=mid+1; P27Ot1px
for(int cur=l;cur<=r;cur++){ TK5$-6k
if(i1==mid+1) K$S0h-?9]O
data[cur]=temp[i2++]; ~^F]t$rz
else if(i2>r) |O8e;v72g^
data[cur]=temp[i1++]; Pp?P9s{
else if(temp[i1] data[cur]=temp[i1++]; Q7+WV`&
else KMhrw s{&B
data[cur]=temp[i2++]; 7ZUN;mr
} 0F$|`v"0
} | R,dsBd
RZz?_1'
} Il=6t
fG2)r
改进后的归并排序: >{^_]phlb
+R~]5Rxd
package org.rut.util.algorithm.support; }u^bTR?3
:DH@zR
import org.rut.util.algorithm.SortUtil; `gl?y;xC
!&U75FpN}:
/** <$nPGz)}
* @author treeroot ]TrJ*~
* @since 2006-2-2 30h[&Oc
* @version 1.0 Jk.x^
*/ 8r(Vz
public class ImprovedMergeSort implements SortUtil.Sort { lO@-*m$
Vz mlKVE
private static final int THRESHOLD = 10; ]yOM
r`"_D%kc
/* ev&l=(hY
* (non-Javadoc) Rxy|Ag/I;V
* kH 9k<{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rVabkwYD
*/ #c|l|Xvq2
public void sort(int[] data) { LNL}R[1(
int[] temp=new int[data.length]; *RY}e
mergeSort(data,temp,0,data.length-1); 'bfxQ76@sa
} m0G"Aj
)=)N9CRy
private void mergeSort(int[] data, int[] temp, int l, int r) { &^ERaPynd
int i, j, k; jnV#Q ;
int mid = (l + r) / 2; Gr({30"8
if (l == r) q~qz^E\T
return; sD3Ts;k
if ((mid - l) >= THRESHOLD) }Z <I%GT
mergeSort(data, temp, l, mid); 1^k}GXsWmE
else >D=X Tgqqq
insertSort(data, l, mid - l + 1); !+$qSD,%x
if ((r - mid) > THRESHOLD) hx^@aI
mergeSort(data, temp, mid + 1, r); #o&T$D5
else P.(UbF d'
insertSort(data, mid + 1, r - mid); n l5+#e*\
m#h`iW
for (i = l; i <= mid; i++) { $I5|rB/4?
temp = data; &Hw:65O
} ^aaj=p:cV
for (j = 1; j <= r - mid; j++) { 4H;g"nWqO
temp[r - j + 1] = data[j + mid]; -t_&H\_T
} P#pb48^-
int a = temp[l]; ^(Gl$GC$Mu
int b = temp[r]; -Ua5anzB
for (i = l, j = r, k = l; k <= r; k++) { WDNj7
if (a < b) { |(~IfSE2
data[k] = temp[i++]; r%: :q^b3
a = temp; Xp;'Wa"@
} else { T:j41`g%s
data[k] = temp[j--]; i(A`'V8GY
b = temp[j]; <,Gjo]z
} %YxKWZ/?
} ['(qeS@5O
} E.#JCO|(1
1mV ' ~W
/** X'd\b}Bm
* @param data D*L@I@ [
* @param l nR%w5oe
* @param i ?r;F'%N=
*/ K*~xy bA
private void insertSort(int[] data, int start, int len) { c'$y_]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8?~>FLWTXZ
} SP0ueAa}
} ^C,rN;mX'
} i@{b+5$
} Tu:lIy~A
ruhC:rg:/
堆排序： C4E*q3[Y
D[T\_3W
package org.rut.util.algorithm.support; aeMj4|{\
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import org.rut.util.algorithm.SortUtil; Njo.-k
j+.E#:tu"
/** BDN}`F[F
* @author treeroot >>=zkPy
* @since 2006-2-2 BDp(&=ktq
* @version 1.0 ddYb=L+_b
*/ B <Jxj
public class HeapSort implements SortUtil.Sort{ RCkmxO;b&
__z/X"H
/* (non-Javadoc) }2=~7&)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c7rC!v
*/ +o.#']}Pl
public void sort(int[] data) { 0>,i] |Y
MaxHeap h=new MaxHeap(); Kj"n Id)
h.init(data); iR4"I7J
for(int i=0;i h.remove(); o/U}G,|G
System.arraycopy(h.queue,1,data,0,data.length); ='#7yVVcs
} \hJLa
M7DoAS{6e
private static class MaxHeap{ pE1uD4lLb
*R&77 o7
void init(int[] data){ Vl7V?`_4
this.queue=new int[data.length+1]; ^(*eoe
for(int i=0;i queue[++size]=data; JWt@vf~
fixUp(size); #,jm3Mqj
} 3&X5*-U
} %*L8W*V
,[n=PJVw/
private int size=0; q:_-#u
s_u! RrC
private int[] queue; 0s4]eEXH
gYL#} )g
public int get() { &S^a_L:
return queue[1]; H8c -/
} y_IF{%i
BQMo*I>I
public void remove() { q|.0Ja
SortUtil.swap(queue,1,size--); h#h)=;
fixDown(1); ud(w0eX
} enMHKN g
file://fixdown wh]v{Fi'
private void fixDown(int k) { <.|]%7
int j; -P]onD
while ((j = k << 1) <= size) { O|;|7fCB\
if (j < size %26amp;%26amp; queue[j] j++; T.!.3B$@]
if (queue[k]>queue[j]) file://不用交换 :2L-Nf
break; 7r3EMX\#Qm
SortUtil.swap(queue,j,k); <l)I%1T_c
k = j; "jq F
} >+BLD
} Kn+B):OY+
private void fixUp(int k) { Xp^71A?>
while (k > 1) { e<{Ani0
int j = k >> 1; bmC{d
if (queue[j]>queue[k]) l%cE o`U
break; yV@~B;eW0
SortUtil.swap(queue,j,k); xqVIw!J?/}
k = j; ;>p{|^X0D
} uoY]@.
} Nrp1`qY
Yv;iduc('
} 6r5<uZ9w_X
&-.2P!t
} -1F+,+m
9(9\kQj{C
SortUtil： } AHR7mu=
Daf;; w
package org.rut.util.algorithm; &W y9%
~ Q;qRx
import org.rut.util.algorithm.support.BubbleSort; l;JB;0<s"
import org.rut.util.algorithm.support.HeapSort; r^"pLzAx
import org.rut.util.algorithm.support.ImprovedMergeSort; L6pw'1'
import org.rut.util.algorithm.support.ImprovedQuickSort; |P=-m-W
import org.rut.util.algorithm.support.InsertSort; C'z}jM`g
import org.rut.util.algorithm.support.MergeSort; gDsb~>rb|
import org.rut.util.algorithm.support.QuickSort; ,3ivB8
import org.rut.util.algorithm.support.SelectionSort; pu+jw<7
import org.rut.util.algorithm.support.ShellSort; vB/G#\Zqz
\R#OJ=F
/** cCy*?P@
* @author treeroot !vSj1w
* @since 2006-2-2 XCZNvLG
* @version 1.0 [%6"UH r
*/ x_KJCU
public class SortUtil { v+2t;PJd2
public final static int INSERT = 1; 2HREO@._)
public final static int BUBBLE = 2; ON3~!Q)
public final static int SELECTION = 3; >^KO5N-:4
public final static int SHELL = 4; r7:4|6E
public final static int QUICK = 5; bu r0?q
public final static int IMPROVED_QUICK = 6; &qFy$`"
public final static int MERGE = 7; Z:%~Al:
public final static int IMPROVED_MERGE = 8; <bOi}
public final static int HEAP = 9; $~.'Tnk)
>BlF< d`X
public static void sort(int[] data) { ^{fA:N=
sort(data, IMPROVED_QUICK); 5F|oNI}$:
} 6M_,4> -
private static String[] name={ k| ,F/:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ER$qL"H U
}; +dSO?Y]
Xkb\fR6<K
private static Sort[] impl=new Sort[]{ -Fs<{^E3j
new InsertSort(), 9rhl2E
new BubbleSort(), ZC:7N{a
new SelectionSort(), h}jE=T5Hc
new ShellSort(), kC-OZVoO
new QuickSort(), >a2i%j/T
new ImprovedQuickSort(), Sy`7})[
new MergeSort(), CrI:TB>/"
new ImprovedMergeSort(), [E|%
new HeapSort() iwnFCZVS
}; rXu^]CK *G
6{PlclI !
public static String toString(int algorithm){ qm=N@@R&
return name[algorithm-1]; EAXbbcV
} vTU*6)
?T <2Cl'C
public static void sort(int[] data, int algorithm) { u IGeSd5B
impl[algorithm-1].sort(data); dBMr%6tz
} =6:>C9
J PK(S~
public static interface Sort { N3g\X
public void sort(int[] data); 5ki<1{aVtZ
} KI{B<S3*Z
h#rziZ(
public static void swap(int[] data, int i, int j) { +&h<:/ V
int temp = data; u3ns-e
data = data[j]; o79EDPX
data[j] = temp; hV]]%zwR+
} -9z!fCu3
} yJAz#~PO/