[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; MP )nQ
} r'|ei,
int i1=l; ,>kXn1 ,
int i2=mid+1; ]g%HU%R-m
for(int cur=l;cur<=r;cur++){ C.}ho.} r
if(i1==mid+1) !QqVJ a{j
data[cur]=temp[i2++]; od!s5f!
else if(i2>r) QY\'Uu{
data[cur]=temp[i1++]; `$JOFLa
else if(temp[i1] data[cur]=temp[i1++]; D-m%eP.
else ePSD#kY5
data[cur]=temp[i2++]; UpiZd/K
} ds2xl7jg
} f7%g=0.F
^Y8G}Z|
} )"00fZL
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改进后的归并排序: nAsc^Yh
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package org.rut.util.algorithm.support; |^w&dj\,
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import org.rut.util.algorithm.SortUtil; %u Dd#+{
~jWpD7px
/** ~PN[ #e]
* @author treeroot idS+&:'
* @since 2006-2-2 )Dcee@/7S
* @version 1.0 Ghe@m6|D
*/ \pI ,6$'
public class ImprovedMergeSort implements SortUtil.Sort { 3m~3l d
*JWPt(bnI
private static final int THRESHOLD = 10; cvpZF5mL]U
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/* &k(tDP
* (non-Javadoc) |>Pv2
* %P*b&H^0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sBE@{w%
*/ E /ycPqD
public void sort(int[] data) { CF+:v(NL
int[] temp=new int[data.length]; X`]>J5
mergeSort(data,temp,0,data.length-1); zHW&i~
} wA87|YK8*
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private void mergeSort(int[] data, int[] temp, int l, int r) { tU8aPiUl
int i, j, k; e.|t12)L "
int mid = (l + r) / 2; :yOJL [x
if (l == r) pQm-Hr78j
return; v1NFz>Hx
if ((mid - l) >= THRESHOLD) BK.RYSN
mergeSort(data, temp, l, mid); "(a}}q 9-
else )9!J $q
insertSort(data, l, mid - l + 1); %nkbQ2^
if ((r - mid) > THRESHOLD) A.!3{pAb
mergeSort(data, temp, mid + 1, r); ?Xp+5{
else c,*a|@
insertSort(data, mid + 1, r - mid); s6oIj$
368H6 Jj
for (i = l; i <= mid; i++) { 1fh6A`c
temp = data; u/`x@u
} Ap}`Q(.
for (j = 1; j <= r - mid; j++) { _`9WNJiL
temp[r - j + 1] = data[j + mid]; uVw|jj
} S.owVMQ
int a = temp[l]; <FvljKuq+
int b = temp[r]; 8KzH -
for (i = l, j = r, k = l; k <= r; k++) { _<)HFg6
if (a < b) { hnv0Loe.IW
data[k] = temp[i++]; DH4|lb}
a = temp; FJB /tg
} else { ~HBx5Cpi
data[k] = temp[j--]; %bhFl,tL
b = temp[j]; >>>MTV f
} %S%0/
} ?zK>[L
} g^k=z:n3,
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/** ^Ov+n1,)
* @param data T%2%*oa
* @param l VmTgD96
* @param i y)`q% J&
*/ Wp=&nh
private void insertSort(int[] data, int start, int len) { S^@#%>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,j[1!*Z_[
} Mwd.S
} w8-L2)Q}I
} Lor__ K
} 1h?:gOig
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堆排序： (/J %Huy
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package org.rut.util.algorithm.support; dcN4N5r
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import org.rut.util.algorithm.SortUtil; %VgK::)r
R #m1Aa
/** 8t&'Yk
* @author treeroot ']vMOGG
* @since 2006-2-2 d|$-l:(J
* @version 1.0 +PHuQ
*/ _dn*H-5hO
public class HeapSort implements SortUtil.Sort{ boIFN;Aq"
q%Lw#f
/* (non-Javadoc) M_F4I$V4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H~ =;yy
*/ 4' <y
public void sort(int[] data) { d/Fy0=0
MaxHeap h=new MaxHeap(); )$E'2|Gm/
h.init(data); xh!aB6m8R
for(int i=0;i h.remove(); L(kW]
System.arraycopy(h.queue,1,data,0,data.length); cN#f$
} ]+AgXUrbOD
4{ exv
private static class MaxHeap{ ;HjT
2v1dSdX,W
void init(int[] data){ 6NzS<
this.queue=new int[data.length+1]; #4?:4Im#
for(int i=0;i queue[++size]=data; 1?#Wg>7'
fixUp(size); X\]Dx./
} qk\LfRbj
} ig:z[k?
\&%y4=y<sE
private int size=0; v!rOT/I
H?dEgubg7]
private int[] queue; .h;X5q1
<p8>"~R
public int get() { (I(k$g[>
return queue[1]; Y@V6/D} 1
} uBBW2
\AB*C_Ri
public void remove() { ;Q%3WD
SortUtil.swap(queue,1,size--); x9H qc9q
fixDown(1); Gjf1Ba
} %{";RfSVX%
file://fixdown Y t0s
private void fixDown(int k) { ;i;;{j@$i
int j; |#(g8ua7
while ((j = k << 1) <= size) { lyrwm{&
if (j < size %26amp;%26amp; queue[j] j++; o|c"W}W
if (queue[k]>queue[j]) file://不用交换 cjBHczkY
break; F5f1j]c
SortUtil.swap(queue,j,k); AV["%$:
k = j; 7:h_U9Za?$
} ?nx 1{2[
} Q02:qn?T
private void fixUp(int k) { Ix|^c268o<
while (k > 1) { pB0Do6+{
int j = k >> 1; Qx !! Ttd{
if (queue[j]>queue[k]) -;o`(3wZq
break; b'yW+
SortUtil.swap(queue,j,k); 2/FH9T;e".
k = j; d0@czNWIC
} aOo;~u2-=
} ?VT ]bxb
vke]VXU9z
} d`4@aoM
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} ffE>%M*
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SortUtil： vD4<G{
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package org.rut.util.algorithm; [=I==?2`X
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import org.rut.util.algorithm.support.BubbleSort; W/|C
import org.rut.util.algorithm.support.HeapSort; @V# wYt
import org.rut.util.algorithm.support.ImprovedMergeSort; lIF*$#`oh*
import org.rut.util.algorithm.support.ImprovedQuickSort; {uMqd-Uu
import org.rut.util.algorithm.support.InsertSort; ;X2(G
import org.rut.util.algorithm.support.MergeSort; J*CfG;Y:
import org.rut.util.algorithm.support.QuickSort; 5mYI5~ p
import org.rut.util.algorithm.support.SelectionSort; wa4(tM2
import org.rut.util.algorithm.support.ShellSort; ]gGCy '*)
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/** VNLggeX'U
* @author treeroot n`)wD~mk
* @since 2006-2-2 h^6Yjy
* @version 1.0 2VNfnk
*/ #2*2xt
public class SortUtil { t#[u X?
public final static int INSERT = 1; -,#LTW<.
public final static int BUBBLE = 2; z;EnAy{9
public final static int SELECTION = 3; l<mEGKB#
public final static int SHELL = 4; k@= LR
public final static int QUICK = 5; P(BV J_n
public final static int IMPROVED_QUICK = 6; Z<0+<tt
public final static int MERGE = 7; M.R]hI
public final static int IMPROVED_MERGE = 8; tqo!WuZAj
public final static int HEAP = 9; Z'sO9Sg8>
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public static void sort(int[] data) { ,0Y5O?pu\
sort(data, IMPROVED_QUICK); 4?^t=7N
} F DCHB~D
private static String[] name={ c;e2= A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bswd20(w
}; Q35/Sp[;x
}X`jhsqT
private static Sort[] impl=new Sort[]{ \LS+.bp%
new InsertSort(), z~BrKdS
new BubbleSort(), 6|D,`dk3U
new SelectionSort(), VX;tglu2
new ShellSort(), %Sdzr!I7*
new QuickSort(), b(~ gQM
new ImprovedQuickSort(), O/=i'0Xv
new MergeSort(), ;Q =EI%_tv
new ImprovedMergeSort(), 9v<Sng
new HeapSort() |<ZkJR3B
}; grhwPnKl
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public static String toString(int algorithm){ $yx34=
return name[algorithm-1]; sR. ecs+
} IFY,j8~q
pMX#!wb
public static void sort(int[] data, int algorithm) { z<F.0~)jb
impl[algorithm-1].sort(data); AQ 5CrYb
} lAwOp
d>Z{TFY
public static interface Sort { *?+maK{5+
public void sort(int[] data); Y(]&j`%
} ,1YnWy*
#)BdN
public static void swap(int[] data, int i, int j) { hFjXgpz5
int temp = data; &,Xs=Lvmq
data = data[j]; vx\h Njb
data[j] = temp; :>[;XT<
} 5)yQrS !{:
} ^m