[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; T4gfQ6#
} qLc&.O.=
int i1=l; BI<9xl]a
int i2=mid+1; ko'V8r`V
for(int cur=l;cur<=r;cur++){ !M9mX%UQ
if(i1==mid+1) w}t}Sh
data[cur]=temp[i2++]; mqUDve(
else if(i2>r) Fi\)ka\u
data[cur]=temp[i1++]; |ITb1O`_P
else if(temp[i1] data[cur]=temp[i1++]; x2aG5@<3
else -f1}N|hy
data[cur]=temp[i2++]; ;X0uA?
} I,,SR"
} aRI.&3-
XFl&(I4tB
} !W0JT#0
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改进后的归并排序: .*>C[^
X.,R%>O}`P
package org.rut.util.algorithm.support; m(kv:5<>
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import org.rut.util.algorithm.SortUtil; 3pL4Zhf
R[fQ$` M
/** c'Z)uquvP
* @author treeroot TL7qOA7^X
* @since 2006-2-2 6"}F KRR
* @version 1.0 EM+! ph
*/ 0b8=94a{>
public class ImprovedMergeSort implements SortUtil.Sort { yv>uzb`N
i.?rom
private static final int THRESHOLD = 10; wN/v-^2
DAORfFG74
/* uk,9N
* (non-Javadoc) In!^+j
* b].U/=Hs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xXmlHo<D
*/ eWD!/yr|
public void sort(int[] data) { /l3Oi@\
int[] temp=new int[data.length]; p} eO
mergeSort(data,temp,0,data.length-1); "[7'i<,AI
} \VW":+
'.S02=/
private void mergeSort(int[] data, int[] temp, int l, int r) { w T_l>u
int i, j, k; .W2w/RayC
int mid = (l + r) / 2; \:q@I]2
if (l == r) Dvl\o;
return; XH/!A`ZK
if ((mid - l) >= THRESHOLD) ]*U; }
mergeSort(data, temp, l, mid); Q`Pe4CrWvu
else HJpx,NU'
insertSort(data, l, mid - l + 1); (dO0`wfM
if ((r - mid) > THRESHOLD) yGC HWP
mergeSort(data, temp, mid + 1, r); }NdLd!
else |o(te
insertSort(data, mid + 1, r - mid); f.oY:3h:
xUa9>=JU{
for (i = l; i <= mid; i++) { UCFFF%
temp = data; ';D>Z?l
} l^}5PHLd
for (j = 1; j <= r - mid; j++) { HL>l.IG?
temp[r - j + 1] = data[j + mid]; EUH9R8)
} w Bm4~~_
int a = temp[l]; p}wysVB
int b = temp[r]; Tkp"mT v?<
for (i = l, j = r, k = l; k <= r; k++) { 4mX]JH`UTe
if (a < b) { L5 Ai
data[k] = temp[i++]; wGIRRM !b
a = temp; hg'eSU$J
} else { ^%g8OP
data[k] = temp[j--]; r(wtuD23q
b = temp[j]; Iq6EoDoq
} Dsv2p~
} z\K%
} P#8lO%;
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/** ,,#6SR(n
* @param data 78?{;iNv
* @param l L6!Hv{ijn
* @param i F4Cq85#
*/ }20tdD ~
private void insertSort(int[] data, int start, int len) { p_apVm\t_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f6Y-ss;'
} F%%mcmHD#
} wZ`{ i
} [kgCB7.V
} Olt;^>MQ
j{=}?+M
堆排序： 7.n\a@I/
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package org.rut.util.algorithm.support; `7V1 F.\
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import org.rut.util.algorithm.SortUtil; .uN(44^+x
uLI;_,/:
/** JZ-64OT
* @author treeroot G[OJ<px
* @since 2006-2-2 8/ukzY1!
* @version 1.0 KRhls"\1
*/ "(';UFa
public class HeapSort implements SortUtil.Sort{ pB%oFWqK
^HI2Vp
/* (non-Javadoc) 20J-VN:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SVV-zz]3M
*/ mfDt_Iq
public void sort(int[] data) { *Id[6Z
MaxHeap h=new MaxHeap(); Y[>`#RhP
h.init(data); 4)L};B=
for(int i=0;i h.remove(); PBiA/dG[;
System.arraycopy(h.queue,1,data,0,data.length); FS('*w&bP
} ^EmePkPI
iT{[zLz>1
private static class MaxHeap{ I;, n|o
9c{ ~$zJW
void init(int[] data){ X>]<rEh
this.queue=new int[data.length+1]; 2:yXeSeA
for(int i=0;i queue[++size]=data; CWd &
fixUp(size); O\%0D.HEz
} aouYPxA`
} wg:\$_Og
v9t'CMU
private int size=0; sULsUt#
&{q'$oF
private int[] queue; }XCh>LvX
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public int get() { /Vx EqIK
return queue[1]; AB<bW3qf(
} N\CHIsVm>
E^pn-rB
public void remove() { }R hSt]
SortUtil.swap(queue,1,size--); ,.<c|5R
fixDown(1); BcQw-<veu
} X%7l! k[
file://fixdown RYl\Q,#
private void fixDown(int k) { 4 .(5m\s!
int j; aH,NS
while ((j = k << 1) <= size) { %[o($a$
if (j < size %26amp;%26amp; queue[j] j++; iI*qx+>f?
if (queue[k]>queue[j]) file://不用交换 7|!Zx-}
break; l#p?lBm1
SortUtil.swap(queue,j,k); <v\x<ul6
k = j; @TzUcE
} zMO xJ
} ]2[\E~^KU
private void fixUp(int k) { B.gEV*@
while (k > 1) { CT<z1)#@^
int j = k >> 1; '3E25BsL
if (queue[j]>queue[k]) ?dCJv_w
break; ~BnmAv$m[
SortUtil.swap(queue,j,k); W3R43>$
k = j; nwDGzC~y<
} $)=`Iai
} AD6 b
r -uu`=,
} D<*)^^
Q7mikg=1-
} ZA'0q
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SortUtil： 'loko#6
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package org.rut.util.algorithm; CXi:?6OG
f\Q_]%^W
import org.rut.util.algorithm.support.BubbleSort; )|Ka'\xr
import org.rut.util.algorithm.support.HeapSort; I3}I7oc_
import org.rut.util.algorithm.support.ImprovedMergeSort; [Qqss8a
import org.rut.util.algorithm.support.ImprovedQuickSort; ZiaFByLy
import org.rut.util.algorithm.support.InsertSort; ,z+n@sUR:
import org.rut.util.algorithm.support.MergeSort; #210 Yp#
import org.rut.util.algorithm.support.QuickSort; K_qA[n
import org.rut.util.algorithm.support.SelectionSort; Enp;-wG:-
import org.rut.util.algorithm.support.ShellSort; 7--E$!9O,
+.*=Fn22
/** "!D,9AkZS
* @author treeroot =:H EF;!
* @since 2006-2-2 `2q]ju
* @version 1.0 &m TYMpA
*/ $]^Io)}f@
public class SortUtil { ~P*{%=a
public final static int INSERT = 1; Ve40H6Ox
public final static int BUBBLE = 2; ]2iEi`"[
public final static int SELECTION = 3; SxX
public final static int SHELL = 4; iU#"G" &
public final static int QUICK = 5; }0OQm?xh
public final static int IMPROVED_QUICK = 6; JPg^h
public final static int MERGE = 7; \e%%ik,<
public final static int IMPROVED_MERGE = 8; ]BmnE#n&
public final static int HEAP = 9; CUaL
$vnx)#r3
public static void sort(int[] data) { h6;zAM}
sort(data, IMPROVED_QUICK); F-D$Y?m
} 5hDPX\
private static String[] name={ TR'_v[uK3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D28>e
}; q$}gQ9'z'
')(U<5y)
private static Sort[] impl=new Sort[]{ 6ywOL'OBM
new InsertSort(), mdcsL~R
new BubbleSort(), J{nA ?[
new SelectionSort(), )6px5Vwz
new ShellSort(), hE4qs~YB!
new QuickSort(), ^Qxv5HS2
new ImprovedQuickSort(), <J.q[fd1*
new MergeSort(), (Hs,Tj
new ImprovedMergeSort(), 'GLpSWL+*
new HeapSort() QEF$Jx
}; (!9+QXb'
`9|Uu#x
public static String toString(int algorithm){ H9WXp&
return name[algorithm-1]; e&NJj:Ph*
} =L{-Hu/j
?&VKZSo
public static void sort(int[] data, int algorithm) { 9N6 \Ou~
impl[algorithm-1].sort(data); )C rsm&
} [?2,(X0yh1
SES-a Mi3
public static interface Sort { Na+h+wD.D
public void sort(int[] data); !y$+RA7\
} "2PT]!
hsYv=Tw3C
public static void swap(int[] data, int i, int j) { b]N&4t
int temp = data; fC$@m_-KD
data = data[j]; ]q&NO(:kbq
data[j] = temp; lLU8eHf\
} BUyKiMW49
} mR8tW"Z2