[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; C~egF=w
} ? X6M8`
int i1=l; fLnwA|n=
int i2=mid+1; O}>@G
for(int cur=l;cur<=r;cur++){ l^Ob60)2
if(i1==mid+1) 793 15A
data[cur]=temp[i2++]; ^s6}[LDW>@
else if(i2>r) }4N'as/ZO
data[cur]=temp[i1++]; 8OKG@hc
else if(temp[i1] data[cur]=temp[i1++]; "4\k1H"_
else ^D<CoxG
data[cur]=temp[i2++]; L&c & <+0T
} /{f"0]-RA
} T%% 0W J
9dq"x[
} }4p)UX>aWT
A|GtF3:G
改进后的归并排序: ]!ox2m_U
VwpC UW
package org.rut.util.algorithm.support; ?r KbL^2
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import org.rut.util.algorithm.SortUtil; d7Vp^^}(
U$mDAi$
/** 1~t.2eUG
* @author treeroot ]XU4nNi
* @since 2006-2-2 8T1zL.u>q
* @version 1.0 VcGl8~#9
*/ >ei~:z]R
public class ImprovedMergeSort implements SortUtil.Sort { gUNhN1=
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private static final int THRESHOLD = 10; Pr1qX5>=
yI1:L -
/* T?Kh'
* (non-Javadoc) t5%cpkgh4
* <4+P37^~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T:u>7?8o
*/ s]%Cz\
public void sort(int[] data) { f[1cN`|z
int[] temp=new int[data.length]; yAfwQ$Ll7
mergeSort(data,temp,0,data.length-1); q[_qZ
} r[4n2Mys
0u1ZU4+EC
private void mergeSort(int[] data, int[] temp, int l, int r) { QuqznYSY{
int i, j, k; }%p:Xv@X!
int mid = (l + r) / 2; I%u 2 ce
if (l == r) -Y@tx fu-
return; 9Q=VRH:
if ((mid - l) >= THRESHOLD) @oE 5JM
mergeSort(data, temp, l, mid); O`c+y
else RI@\cJ\}
insertSort(data, l, mid - l + 1); T/\RViG3
if ((r - mid) > THRESHOLD) y QClq{A
mergeSort(data, temp, mid + 1, r); x>}ml\R
else =nHKTB>
insertSort(data, mid + 1, r - mid); [02rs@c>
tGgxID
for (i = l; i <= mid; i++) { <Cv(@A->
temp = data; [K&%l]P7
} [ N|X
for (j = 1; j <= r - mid; j++) { JcWp14~e
temp[r - j + 1] = data[j + mid]; 4d`YZNvZW/
} qFD ZD)K
int a = temp[l]; 3Rc*vVnI
int b = temp[r]; )[ A-d(y=
for (i = l, j = r, k = l; k <= r; k++) { d #1Y^3n
if (a < b) { H"FK(N\
data[k] = temp[i++]; *{3d+j/?/
a = temp; lG)wa
} else { \P*_zd@%
data[k] = temp[j--]; QkBw59L7
b = temp[j]; E +_n@t"
} <%m YsaM
} +b(};(wL
} zbmC?2$
Z+&V >
/** +P^ ;7"H
* @param data #73pryXV
* @param l {1)A"lQu
* @param i w}gmVJ#p
*/ =0pt-FQ
private void insertSort(int[] data, int start, int len) { h+}BtKA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /~Y\KOH|
} r,Uk)xa/^
} O;H6`JQ
} ysz =Xw
} =#2c r:1
;cXw;$&D
堆排序： 6nZ]y&$G-k
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package org.rut.util.algorithm.support; S MWXP
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import org.rut.util.algorithm.SortUtil; 5MVa;m
R9U{r.AA
/** 3>KEl^1DB
* @author treeroot c_3B:F7
* @since 2006-2-2 S@/{34,
* @version 1.0 WO_Uc_R
*/ /W/e%.
public class HeapSort implements SortUtil.Sort{ jVQy{8{G
IMkE~0x4</
/* (non-Javadoc) }|.<EkA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |-Uh3WUE6
*/ YNr"]SA@;
public void sort(int[] data) { B&]`OO>O
MaxHeap h=new MaxHeap(); M7TLQqaF
h.init(data); 2!{D~Gfl=
for(int i=0;i h.remove(); fB8, )&
System.arraycopy(h.queue,1,data,0,data.length); !;eE7xn&
} L,}'ST
g'7E6n"!,
private static class MaxHeap{ +>"s)R43
J8qFdNK
void init(int[] data){ XwY,xg&o
this.queue=new int[data.length+1]; jr=9.=jI8k
for(int i=0;i queue[++size]=data; &DLWlMGq
fixUp(size); dHy9 wU
} wXIRn?z
} B*Tn@t W
)[ V8YiyU
private int size=0; Fw 0m(7
{DRk{>K,
private int[] queue; *?FVLE
.d<K`.O;
public int get() { tF:AnNp=
return queue[1]; (BEe^]f
} YvJFZ_faX
lq-KM8j
public void remove() { WXy8<?s
SortUtil.swap(queue,1,size--); ~*HQPp?v
fixDown(1); w"j>^#8
} |V a:*3u
file://fixdown 'Aq^z%|
private void fixDown(int k) { @G4Z
int j; ], lLDUZ\
while ((j = k << 1) <= size) { C%z)D1-
if (j < size %26amp;%26amp; queue[j] j++; Tqt-zX|>
if (queue[k]>queue[j]) file://不用交换 "w:h
break; !"N,w9MbD
SortUtil.swap(queue,j,k); /6')B !&
k = j; ,"EaZ/Bl/
} 2lTt
} }J#HIE\RG
private void fixUp(int k) { ]l,D,d81
while (k > 1) { "^#O7.oVi+
int j = k >> 1; "`qk}n-
if (queue[j]>queue[k]) P~j#8cH7
break; Bgxk>Y
SortUtil.swap(queue,j,k); S2$66xr#
k = j; {KG}m'lx
} # EvRm
} 7m2iL#5[
1#vu)a1+b
} 2Re8rcQQU
#Zdh<.
} o%_-u +
/HdXJL9B
SortUtil： 1dN/H)]
r8EJ@pOF2w
package org.rut.util.algorithm; @Tu`0=8
" .7@
import org.rut.util.algorithm.support.BubbleSort; cfTT7O#Dc
import org.rut.util.algorithm.support.HeapSort; y\??cjWb]
import org.rut.util.algorithm.support.ImprovedMergeSort; |/Vq{gxp+
import org.rut.util.algorithm.support.ImprovedQuickSort; eKiDc=@
import org.rut.util.algorithm.support.InsertSort; U1YqyG8
import org.rut.util.algorithm.support.MergeSort; .RroO_H
import org.rut.util.algorithm.support.QuickSort; 7h\is
import org.rut.util.algorithm.support.SelectionSort; "Hw%@]#
import org.rut.util.algorithm.support.ShellSort; RdX+:!lD
NfoHQU<n
/** MSCH6R"5
* @author treeroot \l/(L5gY
* @since 2006-2-2 d:'{h"M6
* @version 1.0 *$A`+D9
*/ aT,WXW*
public class SortUtil { q /JC\
public final static int INSERT = 1; 9C7Npf?~M
public final static int BUBBLE = 2; R>bg3j
public final static int SELECTION = 3; Bl+\|[yd
public final static int SHELL = 4; uuM1_nD[
public final static int QUICK = 5; sVh)Ofn
public final static int IMPROVED_QUICK = 6; OLx;j+p
public final static int MERGE = 7; }ILBX4c
public final static int IMPROVED_MERGE = 8; 2hHRitt36
public final static int HEAP = 9; I bD u+~)
tR!C8:u
public static void sort(int[] data) { |>ztx}\
sort(data, IMPROVED_QUICK); )<QX2~m<
} ~>@~U]
private static String[] name={ -8)Hulo/{U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ef'kG"1
}; [[[C`H@
2bCfY\k
private static Sort[] impl=new Sort[]{ hJSvx
new InsertSort(), .i;.5)shsu
new BubbleSort(), Z66Xj-o
new SelectionSort(), 3HyOQD"{
new ShellSort(), QvbH " 7
new QuickSort(), "}X+vd``
new ImprovedQuickSort(), vd%AV(]<LJ
new MergeSort(), "nz\YQdg
new ImprovedMergeSort(), r5gqRh}+
new HeapSort() '-"[>`[q
}; Z`kVyuQ
g%J\YRo
public static String toString(int algorithm){ 9,8/DW.K
return name[algorithm-1]; FRxR/3&
} d./R;Z- I{
@;O"-7Kk
public static void sort(int[] data, int algorithm) { ?GX@&_
impl[algorithm-1].sort(data); :i{M1z I
} ;gL{*gR]S
mX>N1zAz
public static interface Sort { fgqCX:SWz
public void sort(int[] data); }k.yLcXM
} 6"_pCkn;c<
1L`V{\_0s
public static void swap(int[] data, int i, int j) { @v`.^L{P
int temp = data; ViW2q"4=
data = data[j]; ]U#of O
data[j] = temp; )"?'~5A
} w<~[ad}
} <zpxodM@T