[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; A_<1}8{L
} &Un^ _M
int i1=l; Pqb])-M9p
int i2=mid+1; _U/CG<n
for(int cur=l;cur<=r;cur++){ rc)vVv
if(i1==mid+1) J-+p]xG
data[cur]=temp[i2++]; IL N0/eH
else if(i2>r) p/.[cH
data[cur]=temp[i1++]; AcxC$uh
else if(temp[i1] data[cur]=temp[i1++]; ro*$OLc/
else O7GJg;>?
data[cur]=temp[i2++]; L4H5#?'
} 8cv[|`<
} a0[Mx 4
CAV Q[r5y
} *"K7<S[
'Z ,T,zW
改进后的归并排序: JBvP {5
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package org.rut.util.algorithm.support; +q@g
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import org.rut.util.algorithm.SortUtil; ik Pm,ZN
;c~%:|
/** fN{JLp
* @author treeroot l/o 4bkV
* @since 2006-2-2 R7-+@
* @version 1.0 ejI nJ
*/ O^yDb
public class ImprovedMergeSort implements SortUtil.Sort { @$%[D`Wa<
Zi~-m]9U
private static final int THRESHOLD = 10; o"./
n8vteGQ
/* p:q?8+W-r
* (non-Javadoc) $Hbd:1%i {
* VA0p1AD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [^GXHE=
*/ XZ!^kftyW
public void sort(int[] data) { ,zU7UL^I
int[] temp=new int[data.length]; u+/1ryp
mergeSort(data,temp,0,data.length-1); sFWH*kdP?
} ,I|TjC5
&[iunJv:eq
private void mergeSort(int[] data, int[] temp, int l, int r) { 8ECBi(
int i, j, k; @&LtIN#
int mid = (l + r) / 2; %44Z7
if (l == r) biw2f~V
return; g_F-PT>($
if ((mid - l) >= THRESHOLD) *^b<CZd9
mergeSort(data, temp, l, mid); ;fnE"}
else "=ogO/_Q"
insertSort(data, l, mid - l + 1); 8{iFxTz
if ((r - mid) > THRESHOLD) { WW!P,w
mergeSort(data, temp, mid + 1, r); N J_#;t#j
else tyyfMA?'L;
insertSort(data, mid + 1, r - mid); ww(.
<>|/U`
for (i = l; i <= mid; i++) { ]6 ]Nr
temp = data; &H<n76G
} T)"LuC#C
for (j = 1; j <= r - mid; j++) { mbh;oX+
temp[r - j + 1] = data[j + mid]; o$,Dh?l
} <fm0B3i?
int a = temp[l]; ]iL>Zxex
int b = temp[r]; *dE5yS`H
for (i = l, j = r, k = l; k <= r; k++) { :UdH}u!Ek
if (a < b) { YoEL|r|
data[k] = temp[i++]; 8F*"z^vD=
a = temp; ui#K`.dn
} else { n:d7 Tv1Z8
data[k] = temp[j--]; z3X:.%
b = temp[j]; ^~:&/0
} Y;[#~3CA
} Udbz;^(
} +rA:/!b)Y
3A5:D#
/** Cvf^3~q
* @param data >UUT9:,plA
* @param l f-b#F2I
* @param i Ivue"_i;!
*/ 'HdOW[3o
private void insertSort(int[] data, int start, int len) { _YM]U`*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;YK{[$F
} Sx^4Y\\
} 7w]NG`7
} -w#Hy>E
} ?c!W*`yP
ttaYtV]]
堆排序： NEG&zf
ID1/N)56
package org.rut.util.algorithm.support; uY~xHV_-
v%%;Cp73
import org.rut.util.algorithm.SortUtil; L% cr`<~
nB+ e2e&
/** OG&X7>'3I{
* @author treeroot .oR_r1\y
* @since 2006-2-2 `LID*uD;_
* @version 1.0 R?K[O
*/ [)&(zJHX
public class HeapSort implements SortUtil.Sort{ Hlg Q0qb
a'pJg<
/* (non-Javadoc) S@'yuAe*G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t:h~p-&QB
*/ ~>]/1JFz
public void sort(int[] data) { 6+;B2;*3
MaxHeap h=new MaxHeap(); JG=U@I]
h.init(data); d].(x)|st
for(int i=0;i h.remove(); 0,x<@.pW
System.arraycopy(h.queue,1,data,0,data.length); 'Oe}Ja
} "ccP,#Y
~dO&e=6Hk
private static class MaxHeap{ z2GT9
Xw2tCRzD
void init(int[] data){ ,n&e,I
this.queue=new int[data.length+1]; `?PpzDV7Y
for(int i=0;i queue[++size]=data; %bs~%6)
fixUp(size); gqi|k6V/
} 5U3b&0
} QNzx(IV@
-#ta/*TT:
private int size=0; 8eVQnp*
HSR^R
private int[] queue; cI Byv I-
l$s8O0-'T
public int get() { %O< qw
return queue[1]; :$#";t|
} 9W[ ~c"Ku
I>jDM
public void remove() { ?\l@k(w4[x
SortUtil.swap(queue,1,size--); @6roW\'$
fixDown(1); HP /@ _qk
} [7:(e/&
file://fixdown '#fwNbD
private void fixDown(int k) { 3~%wA(|A
int j; ?+WSYg0
while ((j = k << 1) <= size) { BP7&wd
if (j < size %26amp;%26amp; queue[j] j++; y,`SLgBID
if (queue[k]>queue[j]) file://不用交换 re `B fN
break; aNW!Y':*
SortUtil.swap(queue,j,k); P}El#y#&
k = j; eI 6G
} qrj:H4#VB
} Ak\w)!?s
private void fixUp(int k) { ]qLro<
while (k > 1) { ua^gG3n0
int j = k >> 1; .>{.!a
if (queue[j]>queue[k]) N>'T"^S/
break; d1`us G"
SortUtil.swap(queue,j,k); cTR@ :sm
k = j; -PI_*
} ^nS'3g^"
} 0{Kb1Ut
.<!Jhf$
} K`25G_Y3@
2bB&/Uumsd
} <~[A
Q0}Sju+HX
SortUtil： YMSA[hm
6S~lgH:
package org.rut.util.algorithm; U#jbii6e
d`_X$P4y
import org.rut.util.algorithm.support.BubbleSort; wjr1?c
import org.rut.util.algorithm.support.HeapSort; ]y3'6!
import org.rut.util.algorithm.support.ImprovedMergeSort; 6uU2+I
import org.rut.util.algorithm.support.ImprovedQuickSort; -<'&"-
import org.rut.util.algorithm.support.InsertSort; >4zH\T!
import org.rut.util.algorithm.support.MergeSort; #_, l7q8U
import org.rut.util.algorithm.support.QuickSort; $YmD;
import org.rut.util.algorithm.support.SelectionSort; >q:0w{.TU
import org.rut.util.algorithm.support.ShellSort; ^E5[~C*o3
`;@#yyj:_
/** <]u~;e57
* @author treeroot C>?`1d@
* @since 2006-2-2 Qo!/n`19
* @version 1.0 wuv2bd )+
*/ %Q}T9%Mtj
public class SortUtil { <Q4yN!6
public final static int INSERT = 1; K'`N(WiL
public final static int BUBBLE = 2; Dt9[uyP&
public final static int SELECTION = 3; azj:Hru&t#
public final static int SHELL = 4; jH1!'1s|
public final static int QUICK = 5; vq df-i
public final static int IMPROVED_QUICK = 6; X\I"%6$
public final static int MERGE = 7; drJ<&1O
public final static int IMPROVED_MERGE = 8; Uv(THxVh
public final static int HEAP = 9; SLa\F
2xchjU-
public static void sort(int[] data) { %D(% lh2
sort(data, IMPROVED_QUICK); LV:`siK
} xJvM l`2;
private static String[] name={ QT5,_+ho
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K#B)@W?9
}; M-Az2x;6
<fJ*{$[p
private static Sort[] impl=new Sort[]{ $_6DvJ0
new InsertSort(), H)s$0Xd
new BubbleSort(), L y!!+UM\
new SelectionSort(), 8H>: C(h
new ShellSort(), _pXy}D
new QuickSort(), PTu~PVbp4
new ImprovedQuickSort(), ;+dB-g[
new MergeSort(), =]pcC
new ImprovedMergeSort(), Ax=k0%M[&
new HeapSort() hJ+;N
}; ;_yp@.,\T
l3sL!D1u
public static String toString(int algorithm){ !$:lv)y
return name[algorithm-1]; '$]u?m
} PQmgv&!DP
; 7`y##
public static void sort(int[] data, int algorithm) { m)A~1+M$)L
impl[algorithm-1].sort(data); "Q:m0P xb
} lbw*T
n]/7UH}(<&
public static interface Sort { (z}q6Lfa
public void sort(int[] data); DQ{Yr>J
} >f [Lb|t
)"im|9
public static void swap(int[] data, int i, int j) { vwZrvjP2
int temp = data; ?jywW$
data = data[j]; <c[+60p"
data[j] = temp; #6[7q6{4
} ,&II4;F
} !<wM?Q: