[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; {V{0^T-
} xh=FkY&d
int i1=l; gD,A9a(3
int i2=mid+1; \\y}DNh
for(int cur=l;cur<=r;cur++){ 3KDu!w@
if(i1==mid+1) >t2]Ssi(
data[cur]=temp[i2++]; M^Q&A R'F
else if(i2>r) ,HQ1C8
data[cur]=temp[i1++]; ^u=PdBY
else if(temp[i1] data[cur]=temp[i1++]; Z#srQD3].(
else ^ yY{o/6
data[cur]=temp[i2++]; S83]O!w0
} 8+=p8e~An
} yY-FL`-
AECxd[k$9
} XB6N[E
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改进后的归并排序: Z3LQl(
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package org.rut.util.algorithm.support; YK(XS"Kl
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import org.rut.util.algorithm.SortUtil; ViCg|1c
{yGZc3e1j
/** Kc%tnVyGh:
* @author treeroot Z $ p^v*y
* @since 2006-2-2 )6PJ*;p-
* @version 1.0 ,?P8m"
*/ `;zu1o
public class ImprovedMergeSort implements SortUtil.Sort { eTLI/?|+N
50}.Xm@,BO
private static final int THRESHOLD = 10; bjU 2UcI"<
!&1}w86
/* eA3`]XP.`b
* (non-Javadoc) 5d)'`hACe
* ;5,`Jpca
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <K|3Q'(S
*/ ex0 kb
public void sort(int[] data) { PR48~K,?
int[] temp=new int[data.length]; CnM+HN30o
mergeSort(data,temp,0,data.length-1); n0Qh9*h
} :u[ oc.
:Vu7,o
private void mergeSort(int[] data, int[] temp, int l, int r) { Dx p>
int i, j, k; }rFsU\]:q
int mid = (l + r) / 2; w0q?\qEX
if (l == r) KZ367&>b7
return; I{i:B
if ((mid - l) >= THRESHOLD) D5o+0R
mergeSort(data, temp, l, mid); 9q@z[+X
else 6Cop#kW#
insertSort(data, l, mid - l + 1); n"K {uj))
if ((r - mid) > THRESHOLD) ;'b!7sMO~
mergeSort(data, temp, mid + 1, r); ==PQ-Ia
else V{ 4i$'
insertSort(data, mid + 1, r - mid); 9Bbm7Gd
+MOe{:/6
for (i = l; i <= mid; i++) { E.5*Jr=J
temp = data; 4\ uZKv@,
} 4OqE.LFu
for (j = 1; j <= r - mid; j++) { aPcGI
temp[r - j + 1] = data[j + mid]; {9m!UlTtw
} ~@)-qV^~
int a = temp[l]; Vz=j)[
int b = temp[r]; n $D}0wSM/
for (i = l, j = r, k = l; k <= r; k++) { XL"v21X
if (a < b) { es*_Oo1
data[k] = temp[i++]; s>9z+;~!
a = temp; Wo1V$[`Dy
} else { P?WT)C2)u
data[k] = temp[j--]; $=@9 D,R
b = temp[j]; 7(nz<z p
} <:kTTye|
} ]$XBd{\D{
} '6dD^0dZ
?,+C!R?
/** (e bBH
* @param data 9;xL!cy
* @param l .:|#9%5
* @param i 0NuL9
*/ ~L4*b*W
private void insertSort(int[] data, int start, int len) { Wq[=}qh~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 47(1V/r
} e&FX7dsyy
} a|]%/[G@
} mZ& \3m=
} @wAr[.lZ
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堆排序： UG^?a
*x#&[>
package org.rut.util.algorithm.support; /pSUn"3
/v|68x6
import org.rut.util.algorithm.SortUtil; ba:mO$
H(DVVHx
/** hK9t}NE.O
* @author treeroot F]dd>#
* @since 2006-2-2 ?Uy*6YS
* @version 1.0 YWn6wzu%Vc
*/ !Xv2PdP
public class HeapSort implements SortUtil.Sort{ 99+/W*C
R;Gl{
/* (non-Javadoc) 6S+K*/w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oE|u;o
*/ X{9JSq
public void sort(int[] data) { J*6n6
MaxHeap h=new MaxHeap(); 2gC&R1H
h.init(data); 0x9F*i_
for(int i=0;i h.remove(); B1i!te}*
System.arraycopy(h.queue,1,data,0,data.length); ^S;RX*
} J}Z_.:JO(w
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private static class MaxHeap{ J*q=C%}.
nV,{w4t+
void init(int[] data){ R1b )
this.queue=new int[data.length+1]; 1X!f!0=g+
for(int i=0;i queue[++size]=data; y uK5r
fixUp(size); !Z0rTC3d
} r{6B+3J
} 9'/|?I
l]58P
private int size=0; Z+h70,|
~jRk10T(B
private int[] queue; UV *tO15i
xjn8)C
public int get() { PE6u8ZAb"
return queue[1]; a*n%SUP
} :x*|lz[
]rX?n
public void remove() { }9+1<mT9a/
SortUtil.swap(queue,1,size--); dnWt\>6& 2
fixDown(1); 3{#pd6e5
} g$^qQs)^N
file://fixdown $X<<JnsK
private void fixDown(int k) { uB#B\i
int j; J^+$L"K
while ((j = k << 1) <= size) { T~ q'y~9o
if (j < size %26amp;%26amp; queue[j] j++; >-@{vyoOy
if (queue[k]>queue[j]) file://不用交换 %OfDTs
break; -z~ V
SortUtil.swap(queue,j,k); 3PR7g
k = j; tx&U"]
} >"$-VY6i
} c:,{O0 #
private void fixUp(int k) { PuoJw~^h
while (k > 1) { .T$9Q Ar5
int j = k >> 1; '14l )1g.
if (queue[j]>queue[k]) Gp3t?7S{T
break; %_J/&{6G
SortUtil.swap(queue,j,k); YT%SCaU
k = j; \$\(9!=
} l<MCmKuYp
} hb8@br
K&P{2Hndr
} *~oDP@[S
-Fw4;&>
} O@(.ei*HJ!
}${ZI
SortUtil： ALt";8Oa
~\s &]L
package org.rut.util.algorithm; .2SIU4[P
XJ1nhE
import org.rut.util.algorithm.support.BubbleSort; [j+0EVwB
import org.rut.util.algorithm.support.HeapSort; aFc'_FrQ
import org.rut.util.algorithm.support.ImprovedMergeSort; Y(!)G!CMc
import org.rut.util.algorithm.support.ImprovedQuickSort; YU\t+/b
import org.rut.util.algorithm.support.InsertSort; +7vh__
import org.rut.util.algorithm.support.MergeSort; zB7dCw
import org.rut.util.algorithm.support.QuickSort; ={DB
import org.rut.util.algorithm.support.SelectionSort; Ko1?jPE
import org.rut.util.algorithm.support.ShellSort; T+{'W
#?d>S;)+
/** Ywb)h^{!
* @author treeroot {ZYCnS&?CL
* @since 2006-2-2 Ex&RR< 5
* @version 1.0 (i~%4w=
*/ D '_#?%3^
public class SortUtil { Yiw^@T\H`
public final static int INSERT = 1; 7X3l&J2C4l
public final static int BUBBLE = 2; 7a.#F]`
public final static int SELECTION = 3; owVUL~
public final static int SHELL = 4; ] j?Fk$C
public final static int QUICK = 5; V@xnz)^t
public final static int IMPROVED_QUICK = 6; OZ]3OL,
public final static int MERGE = 7; F^v{Jqc
public final static int IMPROVED_MERGE = 8; >v4~:n2D
public final static int HEAP = 9; W)P_t"'@L
#7:9XID /
public static void sort(int[] data) { D)eKq!_
sort(data, IMPROVED_QUICK); o;-!?uJ
} 2{tJ'3
private static String[] name={ ~#x!N=q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (C[S?@S
}; ,&l*AB!
lVBy&f
private static Sort[] impl=new Sort[]{ r ($t.iS
new InsertSort(), ',ybHW%D%i
new BubbleSort(), <6@NgSFz'
new SelectionSort(), Oua/NF)
new ShellSort(), jM@I"JZb
new QuickSort(), 2"K~:Tm#w
new ImprovedQuickSort(), !g:G{b
new MergeSort(), ?\$/#zak
new ImprovedMergeSort(), (c7{dYV
new HeapSort() VrL>0d&d
}; g/Nj|:3
p2?+[d
public static String toString(int algorithm){ /r{5Lyk*
return name[algorithm-1]; U"G+su->e
} 83(P_Y:
t`3T_t Y
public static void sort(int[] data, int algorithm) { qO'5*d;!d
impl[algorithm-1].sort(data); O g~"+IGp
} {8Nd-WJ{
XD>@EYN<X
public static interface Sort { 1pr_d"#4
public void sort(int[] data); KT?s\w
} qq{N; C
qk"=nAJX
public static void swap(int[] data, int i, int j) { jJnBwHp
int temp = data; bL[W.O0
data = data[j]; W8rn8Rh
data[j] = temp; *==nOO9G
} 'V{k$}P2
} 9r*T3=u.S