[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; )Mok$
} EW`3h9v~
int i1=l; !|!V}O
int i2=mid+1; }fhVn;~}8
for(int cur=l;cur<=r;cur++){ >C i=H(8vN
if(i1==mid+1) mF1oY[xa_
data[cur]=temp[i2++]; &ke4":7X
else if(i2>r) ^2=zp.)
data[cur]=temp[i1++]; Gd"*mLd
else if(temp[i1] data[cur]=temp[i1++]; k5($b{
else *<@
data[cur]=temp[i2++]; `/U:u9H9v
} Gc'HF"w
} 4MIVlg9
x83XJFPWL
} (ZnA#%
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改进后的归并排序: IE6/ E
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package org.rut.util.algorithm.support; CtfSfSAUuu
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import org.rut.util.algorithm.SortUtil; GA|q[<U
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/** |qr[*c3$1
* @author treeroot ~`BOzP
* @since 2006-2-2 6Z"%vrH
* @version 1.0 Wp'\NFe8
*/ D>mLSh
public class ImprovedMergeSort implements SortUtil.Sort { ;f><;X~KX
*0U(nCT&m
private static final int THRESHOLD = 10; _EY:vv
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/* BZj[C=#x
* (non-Javadoc) H [v~
* \DHCf4,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =nsY[ s<
*/ <7p2OPD
public void sort(int[] data) { \yy!?UlaI
int[] temp=new int[data.length]; 1w5nBVC*$V
mergeSort(data,temp,0,data.length-1); Ip4~qGJ
} LP\ Qwj{
52"/Zr}j
private void mergeSort(int[] data, int[] temp, int l, int r) { enNn*.*|
int i, j, k; k\[2o
int mid = (l + r) / 2; 56)B/0=
if (l == r) iZ:-V8{
return; QIw.`$H+
if ((mid - l) >= THRESHOLD) aql*@8 )m
mergeSort(data, temp, l, mid); 1a'JNe$
else &Ls0!dWC
insertSort(data, l, mid - l + 1); RI`A<*>w
if ((r - mid) > THRESHOLD) }'{(rU
mergeSort(data, temp, mid + 1, r); |QY+vO7fxj
else &M2x`
insertSort(data, mid + 1, r - mid); RBb@@k[v
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for (i = l; i <= mid; i++) { JDP#tA3
temp = data; JWBWa-
} 6!'yU=Z`
for (j = 1; j <= r - mid; j++) { 6R<%.-qr
temp[r - j + 1] = data[j + mid]; }}]Y mf
} F-X>|oK>z
int a = temp[l]; & #|vGhA
int b = temp[r]; 7#&sG
for (i = l, j = r, k = l; k <= r; k++) { 4qMHVPJv\
if (a < b) { 81g&WQ'
data[k] = temp[i++]; jm?mO9p~
a = temp; MG<~{Y84}
} else { X6;aF;"5
data[k] = temp[j--]; Y~CS2%j
b = temp[j]; EKt-C_)U
} eDm,8Se
} ]gEfm~YV
} zbnQCLs
'FVT"M~
/** r=k}EP&<
* @param data WsoB!m
* @param l MqpoS
* @param i Nr)(&c8
*/ NUU}8a(K
private void insertSort(int[] data, int start, int len) { ,Q:dAe[ZsX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _#+9)*A
} .{}t[U
} 2rH6ap
} |N g[^
} nYe}d!
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堆排序： A~6 Cs
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package org.rut.util.algorithm.support; H^s SHj
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import org.rut.util.algorithm.SortUtil; lN&GfPP6
qkEy$[D9
/** iaC$K@a{
* @author treeroot }a`LOBne
* @since 2006-2-2 '-x%?Ll
* @version 1.0 J0oR]eT}
*/ 9+/|sU\.%
public class HeapSort implements SortUtil.Sort{ 1@ina`!1O
u>E+HxUJ
/* (non-Javadoc) &yN<@.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NanU%#&
*/ W6PGv1iaW>
public void sort(int[] data) { hi=U
MaxHeap h=new MaxHeap(); ?( '%QfT
h.init(data); _PaOw%Y9
for(int i=0;i h.remove(); KV6S-
System.arraycopy(h.queue,1,data,0,data.length); `7j,njCX.
} gu/Yc`S[
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private static class MaxHeap{ bcZonS
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void init(int[] data){ pxF!<nN1,
this.queue=new int[data.length+1]; -K!-a'J
for(int i=0;i queue[++size]=data; 0(kp>%mbB
fixUp(size); +u#x[xO
} 7%'<}u
} |RmBa'.)z
cBA[D~s
private int size=0; Nt'5}
mvw:E_
private int[] queue; joG>=o
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public int get() { !9 F+uc5
return queue[1]; 9p.>L8
} f[RnL#*xJU
<ZiO[dEV
public void remove() { B/71$i
SortUtil.swap(queue,1,size--); m|k,8guG
fixDown(1); 7Av]f3Zr
} 4Y2>w
file://fixdown `zL9dlZ
private void fixDown(int k) { J]UHq$B
int j; '3Ri/V,
while ((j = k << 1) <= size) { #&Ee5xM=
if (j < size %26amp;%26amp; queue[j] j++; ,Tx8^|b#F
if (queue[k]>queue[j]) file://不用交换 K+\hv~+@
break; r$7rYxFR
SortUtil.swap(queue,j,k); P#xn!fMi
k = j; B]vj1m`9
} 6PH*]#PfoD
} )N/KQ[W
private void fixUp(int k) { ,aJrN!fzU
while (k > 1) { vEsSqzc
int j = k >> 1; 2R!W5gs1<
if (queue[j]>queue[k]) }FXRp=s
break; 3XRG"
SortUtil.swap(queue,j,k); D6t]E)FH
k = j; RBXoU'.
} !=we7vK}
} cMv3` $
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} R4/@dA0
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} (0+m&, z
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SortUtil： *pMA V[^
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package org.rut.util.algorithm; DkIFvsLK
9E^piLA
import org.rut.util.algorithm.support.BubbleSort; Ba6xkEd
import org.rut.util.algorithm.support.HeapSort; UU/|s>F
import org.rut.util.algorithm.support.ImprovedMergeSort; g6V*wjC
import org.rut.util.algorithm.support.ImprovedQuickSort; <G>PPf}
import org.rut.util.algorithm.support.InsertSort; N[-)c,O
import org.rut.util.algorithm.support.MergeSort; m%&B4E#3T
import org.rut.util.algorithm.support.QuickSort; bhmjH(.t
import org.rut.util.algorithm.support.SelectionSort; .kIf1-(<U
import org.rut.util.algorithm.support.ShellSort; msylb~^
*QG;KJ%
/** V'.|IuN
* @author treeroot pB./L&h
* @since 2006-2-2 i`qh|w/b_
* @version 1.0 `2PT 8UM
*/ q4{tH
public class SortUtil { Fn,|J[sC
public final static int INSERT = 1; GLyh1qNX
public final static int BUBBLE = 2; ]_?y[@ZP
public final static int SELECTION = 3; ui1m+
public final static int SHELL = 4; RHbwq]
public final static int QUICK = 5; w.f[)
public final static int IMPROVED_QUICK = 6; 9YABr> ?
public final static int MERGE = 7; $b} +5
public final static int IMPROVED_MERGE = 8; #pfosC[
public final static int HEAP = 9; 6ZBD$1$A!
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public static void sort(int[] data) { $}$@)!-
sort(data, IMPROVED_QUICK); _u$K Lqt/,
} ]Ho`*$dD
private static String[] name={ ny={V*m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R 28*
}; Mk[`HEO
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private static Sort[] impl=new Sort[]{ 3iw9jhK!W
new InsertSort(), j&.BbcE45
new BubbleSort(), 7krA+/Qr(
new SelectionSort(), d}_c(
new ShellSort(), 7w,FA
new QuickSort(), Ks(U]G"V
new ImprovedQuickSort(), U5"OhI
new MergeSort(), &v,p_'k
new ImprovedMergeSort(), U@nwSfp:G
new HeapSort() A]$+ `uS\
}; k#xpY!'7
T"U t).
public static String toString(int algorithm){ 8BDL{?Mu
return name[algorithm-1]; GwBQ pNjy
} |T*qAJ8c
mC`! \"w
public static void sort(int[] data, int algorithm) { q;.]e#wvh
impl[algorithm-1].sort(data); CN(4;-so)
} 46Nf|~
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public static interface Sort { Oy$BR <\
public void sort(int[] data); avu,o
} ;!?K.,N:N
o"[bIXf-h
public static void swap(int[] data, int i, int j) { u7WM6X
int temp = data; 4sjr\9IDC
data = data[j]; +;;%Atgn
data[j] = temp; }8 _9V|E
} J_|x^
} -^v}T/Kl#