[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; pwS"BTZ
} K/*"U*9Kv
int i1=l; nCp_RJu
int i2=mid+1; $pAVTz
for(int cur=l;cur<=r;cur++){ HS ]c~
if(i1==mid+1) `Mbs6AJ
data[cur]=temp[i2++]; Eu"8IM!%-
else if(i2>r) u0,QsD)_X0
data[cur]=temp[i1++]; V9qA'k
else if(temp[i1] data[cur]=temp[i1++]; QT73=>^B
else {:VK}w
data[cur]=temp[i2++]; <?}pCX/O
} vr{|ubG]d
} Skr0WQ
Z!^>!'Z
} W2fcY;HZ
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改进后的归并排序: ov H'_'
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package org.rut.util.algorithm.support; `H>&dK|/
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import org.rut.util.algorithm.SortUtil; c}|.U
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/** 1%R${Qhr
* @author treeroot 5}Ge
* @since 2006-2-2 <nG}]Smd7
* @version 1.0 o<Mccj
*/ $'_Q@ZBq
public class ImprovedMergeSort implements SortUtil.Sort { n'{jc6&|
DNqV]N_W
private static final int THRESHOLD = 10; Q&w_kz.
F?]J`F\I
/* \}u/0UF97
* (non-Javadoc) z;2& d<h
* ?I?~BWu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T}1"
*/ bp}97ZQ
public void sort(int[] data) { );iJ9+ V}
int[] temp=new int[data.length]; <ta{)}IN^
mergeSort(data,temp,0,data.length-1); dmv0hof
} NIQ}+xpC
x|Pz24yP9
private void mergeSort(int[] data, int[] temp, int l, int r) { 5lP8#O?=
int i, j, k; }~PG]A
int mid = (l + r) / 2; Qt{V&Z7
if (l == r) Pi |Z\j)
return; r(Z?Fs/
if ((mid - l) >= THRESHOLD) Qjnh;uBO
mergeSort(data, temp, l, mid); [A{o"zY
else ohyq/u+y~A
insertSort(data, l, mid - l + 1); KU{zzn;g
if ((r - mid) > THRESHOLD) :E|Jqi\
mergeSort(data, temp, mid + 1, r); ar,v/l>d4N
else xg^%8Ls^
insertSort(data, mid + 1, r - mid); LEtGrA/%@b
0<uLQVoR2n
for (i = l; i <= mid; i++) { .>[l@x"
temp = data; Vj1V;dHv
} sq(5k+y*J
for (j = 1; j <= r - mid; j++) { Opg_-Bf
temp[r - j + 1] = data[j + mid]; a3w6&e`
} 1pG|jT+Bi
int a = temp[l]; v?6*n>R
int b = temp[r]; @6+_0^
for (i = l, j = r, k = l; k <= r; k++) { \>wQyz
if (a < b) { |.yS~XFJS
data[k] = temp[i++]; WHOy\j},V
a = temp; 6'e^np
} else { WjR2:kT
data[k] = temp[j--]; -bdWG]w"
b = temp[j]; 1BW9,Xr
} b&4JHyleF
} Nl,iz_2]
} [bX^_ Y
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/** [.xc`CF
* @param data Hf1b&8&:K
* @param l ??P\v0E
* @param i 0g=vMLi
*/ 1'("; 0I
private void insertSort(int[] data, int start, int len) { &J|I&p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <P0 P*>M
} R<Mp$K^b
} [4YRyx&:++
} T95FoA
} g$"x,:2x{
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堆排序： $0P16ZlPC
# c1LOz
package org.rut.util.algorithm.support; Q<MxbHk9
)G, S7A
import org.rut.util.algorithm.SortUtil; |T"j7
6(htpT%J
/** R)$]r>YZF
* @author treeroot ;w]1H&mc*A
* @since 2006-2-2 HGh)d` 8
* @version 1.0 aQY.96yo
*/ _7;G$\^&.
public class HeapSort implements SortUtil.Sort{ lFcHE c
?G~rYETvw
/* (non-Javadoc) HA}q.L]#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "5FP$oR
*/ ,|?#+O{
public void sort(int[] data) { i,Z-UA|f=T
MaxHeap h=new MaxHeap(); ,\3Cq2h
h.init(data); |9$C%@8
for(int i=0;i h.remove(); IN#/~[W
System.arraycopy(h.queue,1,data,0,data.length); 5?Q5cD2]\6
} ,aP5)ZN-
XH*(zTd(?
private static class MaxHeap{ e?07o!7[;
d Efk~V\
void init(int[] data){ %yKcp5_
this.queue=new int[data.length+1]; ?5lO1(
for(int i=0;i queue[++size]=data; GyxLzrp
fixUp(size); Mg8ciV}\xY
} Ygg(qB1q
} Xm(#O1Vm(l
n[y^S3}%;
private int size=0; A~k: m0MX
i Pl/I
private int[] queue; ds+2z=!!e
zT/woiyB`
public int get() { -H[@]Q4w
return queue[1]; !{(crfXB
} RhF<{U.
KMfRMc&
public void remove() { YbWz!.WPe
SortUtil.swap(queue,1,size--); iny/K/5bf
fixDown(1); eW3?3l`fvt
} V8o, e
file://fixdown aWLA6A+C&
private void fixDown(int k) { [rAi9LSO"
int j; GuL0:,
while ((j = k << 1) <= size) { ;BWWafZ
if (j < size %26amp;%26amp; queue[j] j++; XPt>klf
if (queue[k]>queue[j]) file://不用交换 }> C?Zx*
break; "iK'O =M
SortUtil.swap(queue,j,k); tId,Q>zH
k = j; g?}h*~<b
} SnvT !ca
} 1{cF/ :o
private void fixUp(int k) { !rqs!-cCQ
while (k > 1) { R&P^rrC@B5
int j = k >> 1; z1tCSt}7f
if (queue[j]>queue[k]) @ZV>Cl@%2
break; 94*MRn1E
SortUtil.swap(queue,j,k); F60m]NUM)c
k = j; #Ak9f-pf
} -(%Xq{
} YLSDJ$K6
i{Q,>Rt
} v6x jLP;O
NP~3!b
} tI9p2!
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SortUtil： Z%3)w.
Ln\Gv/)
package org.rut.util.algorithm; s6 K~I
Q4N0j' QA
import org.rut.util.algorithm.support.BubbleSort; B4m34)EOE
import org.rut.util.algorithm.support.HeapSort; ^QHgc_oDm
import org.rut.util.algorithm.support.ImprovedMergeSort; we*E}U4
import org.rut.util.algorithm.support.ImprovedQuickSort; lqAv
import org.rut.util.algorithm.support.InsertSort; -&v0JvTJ9j
import org.rut.util.algorithm.support.MergeSort; $\20Vgu<
import org.rut.util.algorithm.support.QuickSort; `VglE?M
import org.rut.util.algorithm.support.SelectionSort; d1*0?GTT
import org.rut.util.algorithm.support.ShellSort; _71I9V&
!g~u'r'1
/** $"Ci{iE
* @author treeroot 4Xv."L
* @since 2006-2-2 4!'4 l=jO
* @version 1.0 ukD:4sv
*/ y,<\d/YY@
public class SortUtil { hrfSe$8
public final static int INSERT = 1; -Zg@#H
public final static int BUBBLE = 2; Fj<a;oV
public final static int SELECTION = 3; +~lPf.
public final static int SHELL = 4; N{!@M_C^%R
public final static int QUICK = 5; x.(Sv]+[
public final static int IMPROVED_QUICK = 6; 2)q$HUIX
public final static int MERGE = 7; OF!n}.O(
public final static int IMPROVED_MERGE = 8; Et)j6xz/F
public final static int HEAP = 9; 7Uh/Gl
:+fW#:
public static void sort(int[] data) { P&Hhq>@Z
sort(data, IMPROVED_QUICK); I[LHJ4
} Thp!X/2O`
private static String[] name={ 5@i(pVWZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GM@0$
}; (xBWxeL~
xw1n;IO4
private static Sort[] impl=new Sort[]{ ;@[ax{ J
new InsertSort(), K7 tSSX<N
new BubbleSort(), PV/hnVUl
new SelectionSort(), 9NC'iFQ#
new ShellSort(), vH?3UW
new QuickSort(), c 9zMI
new ImprovedQuickSort(), @c%h fI
new MergeSort(), E-$N!KY
new ImprovedMergeSort(), uup>WW
new HeapSort() E.Arq6
}; l;;"v) C8
nrz2f7d$
public static String toString(int algorithm){ thQ)J|1
return name[algorithm-1]; ? y^t
} QPz3IK%
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public static void sort(int[] data, int algorithm) { XZpF<7l
impl[algorithm-1].sort(data); 9Jf.Ls
} |-vn,zpe
e?XQ,
public static interface Sort { Lq5Eu$;r
public void sort(int[] data); T_4y;mf!@O
} Ap%tm)@1
! d" i
public static void swap(int[] data, int i, int j) { ZG-[Gz
int temp = data; "]1|%j
data = data[j]; VrZ6m
data[j] = temp; os`#:Ao5
} !XrnD#
} =:7OS>x