[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; rN^P//
} 7Cj6Kw5k
int i1=l; _-g?6q
int i2=mid+1; @=1kr ^i
for(int cur=l;cur<=r;cur++){ }7jg>3ng(
if(i1==mid+1) %phv<AW
data[cur]=temp[i2++]; Nt'u;0
else if(i2>r) .FXn=4l'vV
data[cur]=temp[i1++]; DN;An0 {MK
else if(temp[i1] data[cur]=temp[i1++]; ?rgk
else C %o^AR
data[cur]=temp[i2++]; gkyv[
} &-0eWwMW
} {$mj9?n=v
GT"gB$Mh
} 7 V+rQ
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改进后的归并排序: HJu;4O($
wmr8[n&c
package org.rut.util.algorithm.support; ^yB>0/{)z
>Kc>=^=5
import org.rut.util.algorithm.SortUtil; .AgD`wba
O.8{c;
/** BSu ]NOwe
* @author treeroot KzC`*U[
* @since 2006-2-2 ;ywQk| r
* @version 1.0 pP6pn~}
*/ n7S~nk
public class ImprovedMergeSort implements SortUtil.Sort { Eo }mSd
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private static final int THRESHOLD = 10; hVcV_
u*$ 1e
/* U0:tE>3`
* (non-Javadoc) 2x7%6'
* Wg+fT{[f|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IuQY~!
*/ SrVJ Q~:>
public void sort(int[] data) { jreY'y:
int[] temp=new int[data.length]; iE$/ Rcp
mergeSort(data,temp,0,data.length-1); ?g$dz?^CK&
} 9H<6k*
8HyK;+ZkVd
private void mergeSort(int[] data, int[] temp, int l, int r) { M/,jHG8v
int i, j, k; &<P!o_+eb
int mid = (l + r) / 2; ?*Kewj
if (l == r) #'-L`])7uw
return; v5 yOh5
if ((mid - l) >= THRESHOLD) R3$K[Lv,
mergeSort(data, temp, l, mid); 2Xm\;7
else 3'WS6B+
insertSort(data, l, mid - l + 1); e_BOzN~c
if ((r - mid) > THRESHOLD) >#RXYDd
mergeSort(data, temp, mid + 1, r); [yF4_UoF
else ega< {t
insertSort(data, mid + 1, r - mid); |'2E'?\/x
P2`!)teN
for (i = l; i <= mid; i++) { ~ 0x9`~
temp = data; ;ml;{<jI
} )up!W4h6o
for (j = 1; j <= r - mid; j++) { Z=Oo%lM6B
temp[r - j + 1] = data[j + mid]; 2EOt.4cP
} ;TK:D=p4
int a = temp[l]; av1*i3
int b = temp[r]; dfo{ B/+
for (i = l, j = r, k = l; k <= r; k++) { ;q&>cnLDR
if (a < b) { Iky'x[p,D
data[k] = temp[i++]; ,!f*OWnZ
a = temp; shlL(&Py
} else { .jhuC#x{/
data[k] = temp[j--]; Pv`^#BX'
b = temp[j]; a"{tqNc
} ?hS n)
} wL2d.$?TEg
} CW Y'q
tF)aNtX4^
/** }Jgz#d
* @param data ]y,6
* @param l :G|Jcl=r
* @param i @Zs}8YhC
*/ !m$OI:rr
private void insertSort(int[] data, int start, int len) { l|fOi A*K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /._wXH
} ~<pGiW'w5
} 1X/ q7lR
} e/WR\B'1
} J*8fGR%
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堆排序： \)ac,i@fy
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package org.rut.util.algorithm.support; n2R{$^JxO
}Y5Sf"~M
import org.rut.util.algorithm.SortUtil; UKx91a}g
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/** <BQ4x.[
* @author treeroot f4zd(J
* @since 2006-2-2 =@m|g )
* @version 1.0 .h^."+TJ
*/ -O_5OT4
public class HeapSort implements SortUtil.Sort{ x~}RL-Y2o
Q^8C*ekfg!
/* (non-Javadoc) v"L<{HN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nVoPTr
*/ _tN"<9v.
public void sort(int[] data) { :JSOj@s
MaxHeap h=new MaxHeap(); m5sgcxt/
h.init(data); +GWeu0b(~
for(int i=0;i h.remove(); -lyT8qZ:(
System.arraycopy(h.queue,1,data,0,data.length); 4.7ePbk[E
} S"w$#"EJA
:?{ **&=
private static class MaxHeap{ VuFH >8n
e.i5j^5u
void init(int[] data){ UR?[ba_h
this.queue=new int[data.length+1]; iwL\Ha
for(int i=0;i queue[++size]=data; a[)in ,3
fixUp(size); 'u$$scGt
} l?B\TA^
} lC.Yu$O5
@Q3aJ98)2
private int size=0; g^1M]1.f
j ij:}.d6
private int[] queue; =_8
KLs%{'[7:
public int get() { VZJs@qx:Z
return queue[1]; |J2Rwf
} (hVhzw"~
u|=_!$8
public void remove() { `Y/DttjL
SortUtil.swap(queue,1,size--); )oa6;=go
fixDown(1); &&|*GAjJ
} iD_NpH q
file://fixdown y`=A$>A
private void fixDown(int k) { yjpV71!M
int j; ?K{CjwE.M
while ((j = k << 1) <= size) { ycRy!0l
if (j < size %26amp;%26amp; queue[j] j++; dV8mI,h
if (queue[k]>queue[j]) file://不用交换 qr(SAIX"
break; <O>r e3s
SortUtil.swap(queue,j,k); 9>qR6k?
k = j; waW2$9O
} A5+vzu^
} PV>-"2n
private void fixUp(int k) { OR4!73[I
while (k > 1) { J \1&3r|R
int j = k >> 1; eM+]KG)}
if (queue[j]>queue[k]) xe2Ap[Y'M
break; _;{n+i[
SortUtil.swap(queue,j,k); (D{Fln\
k = j; J(h=@cw
} 9~<HTH
} d> `9!)
?I`']|I
} kh 17
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} mKPyM<Q
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SortUtil： Ezm ~SY
.ev'd&l.
package org.rut.util.algorithm; b-@VR
h2!We#
import org.rut.util.algorithm.support.BubbleSort; \Zqgr/.w/
import org.rut.util.algorithm.support.HeapSort; ;4Y@xS2M
import org.rut.util.algorithm.support.ImprovedMergeSort; }f<.07
import org.rut.util.algorithm.support.ImprovedQuickSort; ykxjT@[
import org.rut.util.algorithm.support.InsertSort; a{QHv0goG
import org.rut.util.algorithm.support.MergeSort; %s%v|HDs
import org.rut.util.algorithm.support.QuickSort; AIF?+i%H}
import org.rut.util.algorithm.support.SelectionSort; fEWS3`Yy
import org.rut.util.algorithm.support.ShellSort; M/ 0!B_(R
P8Fq %k
/** EMmNlj6
* @author treeroot y1(smZU
* @since 2006-2-2 o';sHa'
* @version 1.0 )Rn}4)9!iT
*/ 7:I` ~ @m
public class SortUtil { j{IAZs#@>
public final static int INSERT = 1; gpe^G64c`
public final static int BUBBLE = 2; IR?ICXmtx
public final static int SELECTION = 3; Y>{K2#k
public final static int SHELL = 4; RN'|./N
public final static int QUICK = 5; |%g^6RN
public final static int IMPROVED_QUICK = 6; A/,7%bB1
public final static int MERGE = 7; jnYFA[Ab
public final static int IMPROVED_MERGE = 8; hUcG3IOBf
public final static int HEAP = 9; ot]E\g+!
A{Z=[]r1`E
public static void sort(int[] data) { /,f*IdB
sort(data, IMPROVED_QUICK); DHW;*A-
} DT8|2"H
private static String[] name={ >0=`3X|Y7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tEf_XBjKV
}; `B"=\0
+n%uIv
private static Sort[] impl=new Sort[]{ m\__Fl
new InsertSort(), =GTltFqI1
new BubbleSort(), GNA:|x
new SelectionSort(), Rgw\qOb
new ShellSort(), H*!j\|v0
new QuickSort(), =4"D8UaHr
new ImprovedQuickSort(), Bl2y~fCA
new MergeSort(), 5. 5
new ImprovedMergeSort(), @>_`g=
new HeapSort() h)"PPI
}; @H"~/m_o
b!J21cg<L
public static String toString(int algorithm){ j#"?Oe{_1
return name[algorithm-1]; t(-noy)
} GN /]^{D
PCH&eTKN
public static void sort(int[] data, int algorithm) { RRqHo~*0
impl[algorithm-1].sort(data); )dbi
} W^ict,t
nKp='>Th
public static interface Sort { ^<'5 V)
public void sort(int[] data); Y'&A~/Adf
} `=RJ8u
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public static void swap(int[] data, int i, int j) { 6&S;Nrg9
int temp = data; (n05MwKu\
data = data[j]; Igt:M[ /
data[j] = temp; fD
} YQvN;W
} y~w2^VN=