[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; |Ah'KpL8W
} ZEYT17g]
int i1=l; `A_CLVE
int i2=mid+1; GWsvN&nr
for(int cur=l;cur<=r;cur++){ ?%Hj,b
if(i1==mid+1) qcSlqWDk
data[cur]=temp[i2++]; R?Vs8?
else if(i2>r) G~5EAeG
data[cur]=temp[i1++]; {N42z0c
else if(temp[i1] data[cur]=temp[i1++]; &`Oj<UyJY
else 0JN>w^
data[cur]=temp[i2++]; G>&Tap>
} gdPv,p19L
} R*|y:T,H
q$L=G
} >x]b"@Hkw
CoO..
改进后的归并排序: gi\2bzWkbX
S~X&^JvT
package org.rut.util.algorithm.support; ~)xg7\k
M=:!d$c
import org.rut.util.algorithm.SortUtil; NCR4n_
!W4A9Th
/** gG*]|>M JI
* @author treeroot f3El9[
* @since 2006-2-2 VbyGr~t
* @version 1.0 +GqK$B(x7
*/ 'Z5l'Ac
public class ImprovedMergeSort implements SortUtil.Sort { 7)SG#|v[$
?y_W%ogW
private static final int THRESHOLD = 10; W}{RJWr
JcV'O)&
/* 5tfD*j n
* (non-Javadoc) oM\b>*
* Xo[j*<=0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DLggR3K_\
*/ . 7*k}@k
public void sort(int[] data) { .,[NJ:l
int[] temp=new int[data.length]; +}1h
mergeSort(data,temp,0,data.length-1); &\6Buw_
} gCfAy=-,V
utOATjB.z
private void mergeSort(int[] data, int[] temp, int l, int r) { *9Ta0e*
int i, j, k; w{TZN{Y
int mid = (l + r) / 2; {x_SnZz&
if (l == r) #@%DY*w]v
return; iXLODuI
if ((mid - l) >= THRESHOLD) kd55y
mergeSort(data, temp, l, mid); qV]p\/a.
else E0HXB1"
insertSort(data, l, mid - l + 1); }9=X*'BO
if ((r - mid) > THRESHOLD) -7-r~zmr
mergeSort(data, temp, mid + 1, r); ^#i3JMq
else 9lXjB_wG>
insertSort(data, mid + 1, r - mid); } V *
\"k[y+O],4
for (i = l; i <= mid; i++) { I "Qf};n
temp = data; 8.JFQ/)i
} $[(amj-;l
for (j = 1; j <= r - mid; j++) { 'C[{cr.`
temp[r - j + 1] = data[j + mid]; eV(nexE
} LK>AC9ak<
int a = temp[l]; ,i]X^z5!
int b = temp[r]; I}^Q u0ub
for (i = l, j = r, k = l; k <= r; k++) { 6&9}M Oc
if (a < b) { [d dKC)tA
data[k] = temp[i++]; uy'I#^Bt
a = temp; ;r8< Ed
} else { OKo)p`BX
data[k] = temp[j--]; QH>e_
b = temp[j]; #!.26RM:P
} wqnrN6$jf
} eeMeV>
} sOVbz2\yb
;15j\{r
/** ]#NJ[IZb
* @param data "5wer5? t
* @param l Ty&Ok*
* @param i ioW&0?,Ym
*/ Z:(Zy
private void insertSort(int[] data, int start, int len) { ]nIH0k3y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;9&#Sb/
} ;6)Onwx
} 2#jBh
} MA`.&MA.
} B+VD53 V
aw\0\'}
堆排序： )swu~Wb}U@
X;/5Niv32q
package org.rut.util.algorithm.support; e0Jz|?d=
`*Ju0)g1
import org.rut.util.algorithm.SortUtil; 1Zo"Xb
8pXului
/** 9cqq"-$G`
* @author treeroot wH0m^?a!3
* @since 2006-2-2 '}5Yc,
* @version 1.0 [`n)2} k
*/ XG!s+ShFV
public class HeapSort implements SortUtil.Sort{ :aHLr[%Mz
TC* 78;r
/* (non-Javadoc) mVsghDESJ)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ` W}Bc
*/ OF1fS\P<>
public void sort(int[] data) { af-
MaxHeap h=new MaxHeap(); a(#aEbN?d
h.init(data); FW@(MIH
for(int i=0;i h.remove(); zn)Kl%N^
System.arraycopy(h.queue,1,data,0,data.length); "?HDv WP=w
} "3;b,<0
'eYM;\%('
private static class MaxHeap{ bXNM.K
o%SD\zk
void init(int[] data){ N|-'Fu
this.queue=new int[data.length+1]; ^[g7B"`K5
for(int i=0;i queue[++size]=data; #d*)W3e2{
fixUp(size); dX;Q\ ]"
} rtn.^HF
} nj4G8/U-q
NsN =0ff
private int size=0; 5Tg[-tl
ozOvpi:k3%
private int[] queue; O<>cuW(l
&_dM2lj{
public int get() { #I9hKS{
return queue[1]; ""W*) rR
} 1yd}F`{8UF
"CTK%be{q/
public void remove() { ym*oCfu=
SortUtil.swap(queue,1,size--); xH4Qv[k Q7
fixDown(1); aovw'O\Q
} L ]Y6/Q
file://fixdown Z=.$mFE\
private void fixDown(int k) { yt[vd8O'c
int j; e.'6q ($3
while ((j = k << 1) <= size) { !mIr_d2"
if (j < size %26amp;%26amp; queue[j] j++; 7^FJ+gN8b
if (queue[k]>queue[j]) file://不用交换 !v\_<8
break; h%PbM`:}6
SortUtil.swap(queue,j,k); ~YQH]
k = j; ZcE:r+
} &cf(}
} +i@{h9"6g
private void fixUp(int k) { I-L:;~.
while (k > 1) { 0nsjihw
int j = k >> 1; 5Z_7Sc
if (queue[j]>queue[k]) ;6655C
break; ]9PQKC2&
SortUtil.swap(queue,j,k); s9[547?`
k = j; zEy,aa:M
} =-%10lOI
} PD$' ~2
z,K;GZuP
} =berCV
^-2|T__
} M]7>Ar'zsG
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SortUtil： G7NRpr
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package org.rut.util.algorithm; B&rw R/d
YT~h1<se
import org.rut.util.algorithm.support.BubbleSort; 0WI@BSHnM
import org.rut.util.algorithm.support.HeapSort; HY2*5#T
import org.rut.util.algorithm.support.ImprovedMergeSort; 7'zXf)!
import org.rut.util.algorithm.support.ImprovedQuickSort; NbPNcjPL
import org.rut.util.algorithm.support.InsertSort; jz$ ]"\G#
import org.rut.util.algorithm.support.MergeSort; ;!(GwgllD
import org.rut.util.algorithm.support.QuickSort; 9/#?]LJ
import org.rut.util.algorithm.support.SelectionSort; Xy]Pmt
import org.rut.util.algorithm.support.ShellSort; yvIzgwN%s!
P$#{a2
/** SX]uIkw
* @author treeroot 5j~1%~,#
* @since 2006-2-2 ,X}Jpi;/
* @version 1.0 wAKm]?zB>
*/ Bdr'd? u<A
public class SortUtil { &w%--!T
public final static int INSERT = 1; &>A<{J@VL
public final static int BUBBLE = 2; i_f\dkol
public final static int SELECTION = 3; !hjA
public final static int SHELL = 4; Ox%p"xuP,
public final static int QUICK = 5; (sqI:a
public final static int IMPROVED_QUICK = 6; e#odr{2#4u
public final static int MERGE = 7; wV^c@.ga
public final static int IMPROVED_MERGE = 8; ?np3*;lw
public final static int HEAP = 9; 0vZ49}mb)
v2jpao<K
public static void sort(int[] data) { 2(AuhZ>
sort(data, IMPROVED_QUICK); XiO~^=J
} +SNjU"x
private static String[] name={ g\]~H%2 ,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |*(R$tX
}; /Ref54
N|e#&
private static Sort[] impl=new Sort[]{ ?/q\S
new InsertSort(), 4o|<zn
new BubbleSort(), jSMxba]
new SelectionSort(), 8(>2+#exw
new ShellSort(), A)_HSIVi
new QuickSort(), }D[j6+E
new ImprovedQuickSort(), ;6M [d
new MergeSort(), ipC <p?PpR
new ImprovedMergeSort(), 722:2 {
new HeapSort() (vFO'jtcB-
}; Y/ I32@
k}0b7er=R
public static String toString(int algorithm){ "1Y'VpKm(~
return name[algorithm-1]; yT-qT_.
} a4&Aw7"X
CUnBi?Mi
public static void sort(int[] data, int algorithm) { b\S~uFq6
impl[algorithm-1].sort(data); w:+&i|H>
} UDW_?SHAx
NwyNl
public static interface Sort { L;-V Yo#
public void sort(int[] data); an2Yluc;
} <q&4Y+b
8d7 NESYl
public static void swap(int[] data, int i, int j) { Y_<-.?jf
int temp = data; G8&/Ic
data = data[j]; x c]#8K
data[j] = temp; 8"}8Nrb0
} 8.:WMH`
} -B& Nou