[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; 'tbb"MEi4
} 4|(?Wt)5
int i1=l; A"'MRYT`
int i2=mid+1; cm]]9z_<
for(int cur=l;cur<=r;cur++){ (gZ!o_
if(i1==mid+1) VtO+=mZV
data[cur]=temp[i2++]; a:fHTU=\p
else if(i2>r) ~JXHBX
data[cur]=temp[i1++]; Vo%d;>!G\;
else if(temp[i1] data[cur]=temp[i1++]; w.8~A,5}Dh
else /\#5\dHj
data[cur]=temp[i2++]; 82X.
} /K^cU;E,
} z)%1i
ZwMw g t
} ~K9U0ypH
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改进后的归并排序: -)oBh
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package org.rut.util.algorithm.support; {UcItLjY
ng*%1;P
import org.rut.util.algorithm.SortUtil; K288&D|1WU
6"7qZq
/** R%%`wmG)"
* @author treeroot Bu1z$#AC
* @since 2006-2-2 Db=gS=Qm
* @version 1.0 sD8S2
*/ L|X5Ru
public class ImprovedMergeSort implements SortUtil.Sort { Bt,Xe~$z-
vrzX%'
private static final int THRESHOLD = 10; to3J@:V8e
/<0D E22
/* +&OqJAu
* (non-Javadoc) WM"^#=+$
* vgj^-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vi8~j
*/ 8-:k@W
public void sort(int[] data) { ~-5@- V
int[] temp=new int[data.length]; er0D5f R
mergeSort(data,temp,0,data.length-1); j&A3s{S4A
} 0>iFXw:fn
=[JN'|Q+
private void mergeSort(int[] data, int[] temp, int l, int r) { |8 bO5l:
int i, j, k; :OCuxSc%5
int mid = (l + r) / 2; xV#a(>-4
if (l == r) Net)l@IB]
return; vLuQe0l{
if ((mid - l) >= THRESHOLD) ,SF.@^o@a
mergeSort(data, temp, l, mid); xXZKj
else %i8>w:@NW
insertSort(data, l, mid - l + 1); A Vm{#^p[(
if ((r - mid) > THRESHOLD) u!o]Co>
mergeSort(data, temp, mid + 1, r); -l H>8+
else iIaT1i4t.
insertSort(data, mid + 1, r - mid); ti^v%+r1
T[-c|
for (i = l; i <= mid; i++) { vQ"s
temp = data; 5xDN&su
} P0e""9JOo
for (j = 1; j <= r - mid; j++) { UMuuf6
temp[r - j + 1] = data[j + mid]; Q)`gPX3F
} &_d/ciq1f
int a = temp[l]; :z.Y$]F@
int b = temp[r]; zN+*R;Ds
for (i = l, j = r, k = l; k <= r; k++) { _]xt65TL
if (a < b) { &3Z. #*
data[k] = temp[i++]; ~59`S#ax/l
a = temp; x XM!E 8
} else { PCPf*G>
data[k] = temp[j--]; ny(GTKoUz
b = temp[j]; 8A^jD(|
} & 8'(
} 6_<s=nTX
} E0eQ9BXh
ZBmXaP[9
/** ~sIGI?5f
* @param data q|o|/O-{
* @param l <*"pra{3
* @param i f{Fe+iPc
*/ LxlbD#<V
private void insertSort(int[] data, int start, int len) { ]hE+$sKd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dA1 C)gLi
} tB7K&ssi
} bugFl>
} d"I28PIS"
} rjL?eTU"s
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堆排序： v0`qMBr1y
DVl[t8K!
package org.rut.util.algorithm.support; Kr/h`RM
8jggc#.
import org.rut.util.algorithm.SortUtil; =0h|yjnL/
HX3D*2v":
/** %e Sm&`
* @author treeroot x^)g'16`
* @since 2006-2-2 o)tKH@`vE
* @version 1.0 l*K I
*/ f4'El2>-86
public class HeapSort implements SortUtil.Sort{ v._Egk0
"[*S?QO(L
/* (non-Javadoc) & =73D1A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QSHJmk 6L
*/ \[hn]@@
public void sort(int[] data) { vZb|!#I
MaxHeap h=new MaxHeap(); 5=Kq@[(4
h.init(data); jq57C}X}2
for(int i=0;i h.remove(); ]6{(Hjt
System.arraycopy(h.queue,1,data,0,data.length); K`Bq(z?/
} #)^^_
}+Rgx@XZ\
private static class MaxHeap{ j?:`-\w5
URYZV8=B~
void init(int[] data){ ]}z'X!v_@
this.queue=new int[data.length+1]; +`;+RDKY*
for(int i=0;i queue[++size]=data; Z+Yeg
fixUp(size); _1>SG2h{fV
} 5vD3K!\u
} .E+OmJwD
I&L.;~
private int size=0; WD15pq l
f).*NX
private int[] queue; $!!R:Wn/R
;>NP.pnA)
public int get() { EjWgaV
return queue[1]; lijB#1<8*
} X<(6T
Q_ctX|.
public void remove() { 8y$5oD6g9
SortUtil.swap(queue,1,size--); vqq6B/r@Fu
fixDown(1); ,-@xq.D
} C<_Urnmn
file://fixdown RX:R*{]-
private void fixDown(int k) { }@d>,1DU
int j; 9%sFJ
while ((j = k << 1) <= size) { .iFViVZC
if (j < size %26amp;%26amp; queue[j] j++; 5XDgs|8
if (queue[k]>queue[j]) file://不用交换 ^^%JoQ.
break; ~?gzq~~t
SortUtil.swap(queue,j,k); Hi^35
k = j; >-!r9"8@
} Zr=ib
} C1b*v&1{
private void fixUp(int k) { tl|ijR
while (k > 1) { # Mu<8`T-
int j = k >> 1; 7%e1cI
if (queue[j]>queue[k]) gNqAj# m
break; 4sTMgBzw
SortUtil.swap(queue,j,k); lr,q{;
k = j; h\(B#SN
} ML=eL*}l
} vm8$:W2 }
8) HBh7/
} }MP>]8Aq
i0>]CJG
} tAERbiH
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SortUtil： =NadAyv
[@//#}5v
package org.rut.util.algorithm; ! D$Ooamq
[ 7g><
import org.rut.util.algorithm.support.BubbleSort; p}uncIod
import org.rut.util.algorithm.support.HeapSort; Q=WySIF.
import org.rut.util.algorithm.support.ImprovedMergeSort; |#k@U6`SG
import org.rut.util.algorithm.support.ImprovedQuickSort; [EKQR>s)
import org.rut.util.algorithm.support.InsertSort; }"|K(hq
import org.rut.util.algorithm.support.MergeSort; .4E&/w+
import org.rut.util.algorithm.support.QuickSort; 3U0`,c\ao*
import org.rut.util.algorithm.support.SelectionSort; Fx2bwut.K
import org.rut.util.algorithm.support.ShellSort; yPal<c
3eF-8Z(f
/** xU4 +|d
* @author treeroot z*!%g[3I
* @since 2006-2-2 NGbG4-w-
* @version 1.0 H5Io{B%=
*/ y2^Y/)
public class SortUtil { =o$sxb E(
public final static int INSERT = 1; y]f"@9G#
public final static int BUBBLE = 2; 2I,^YWR
public final static int SELECTION = 3; .?loO3 m
public final static int SHELL = 4; >7QvK3S4%
public final static int QUICK = 5; c_4[e5z
public final static int IMPROVED_QUICK = 6; ^y<<>Y'I
public final static int MERGE = 7; y#3j`. $3p
public final static int IMPROVED_MERGE = 8; GJ_7h_4
public final static int HEAP = 9; QD0"rxZJ
?M\{&mlF
public static void sort(int[] data) { 3v1iy/ /
sort(data, IMPROVED_QUICK); ;5659!;
} oY933i@l)P
private static String[] name={ v]B3m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G?Q3/y(
}; PoxK{Y
]7Tkkw$
private static Sort[] impl=new Sort[]{ 4b98KsYg
new InsertSort(), iT2B'QI=<
new BubbleSort(), J4fi'
new SelectionSort(), e,W%uH>X
new ShellSort(), NTYg[VTr
new QuickSort(), %H]ptH5
new ImprovedQuickSort(), uM_wjP
new MergeSort(), n[lJLm^(_C
new ImprovedMergeSort(), ^\4h<M
new HeapSort() B><d9d
}; cj$[E]B3V*
UG+d-&~Ll
public static String toString(int algorithm){ 5kCUaPu
return name[algorithm-1]; PoG-Rqe
} e4?>-
Uq^#riq
public static void sort(int[] data, int algorithm) { zh8nc%X{
impl[algorithm-1].sort(data); Vex{.Vh,"
} Cv6'`",Yzm
: y%d
public static interface Sort { g/CSGIIT
public void sort(int[] data); S[PE$tYT#t
} ;:\<gVi:
|}=acc/
public static void swap(int[] data, int i, int j) { X=5xh
int temp = data; nn@-W]
data = data[j]; a7r%X -
data[j] = temp; |}BLF
} xhVO3LW'
} QdF5Cwf4