[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; B h@R9O<
} 583ej2HPg
int i1=l; THJ KuWy
int i2=mid+1; _Jk-nZgn
for(int cur=l;cur<=r;cur++){ -?e~dLu
if(i1==mid+1) |(}uagfrd
data[cur]=temp[i2++]; LnZ*,>1Z
else if(i2>r) >r{3t{
data[cur]=temp[i1++]; z~4L=tA(
else if(temp[i1] data[cur]=temp[i1++]; CWE jX-
else _S8]W !c
data[cur]=temp[i2++]; `PSr64h:D
} +6*oO|
} f<xF+wE
TcZ Ci^1F
} C+P}R]cT"
dS0G+3J&+E
改进后的归并排序: 2c5>0f
Mki(,Y|1~
package org.rut.util.algorithm.support; hOfd<k\A
S#jH2fRo
import org.rut.util.algorithm.SortUtil; ]j*o&6cQf
BS*cG>T
/** bsM`C]h&
* @author treeroot 3=t}py7M
* @since 2006-2-2 L]9!-E
* @version 1.0 $msT,$NJ
*/ uP|AP
public class ImprovedMergeSort implements SortUtil.Sort { oVoTnGNM6
j0=`Jf
private static final int THRESHOLD = 10; -5p=gO
<2A4}+p:
/* m f4@g05
* (non-Javadoc) /,Ln)?eD
* =_%:9FnQ0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .w$v<y6C
*/ !\y_ik
public void sort(int[] data) { feNr!/
int[] temp=new int[data.length]; x18ei@c
mergeSort(data,temp,0,data.length-1); WHbvb3'
} Fj1/B0acS
g/`i:=
private void mergeSort(int[] data, int[] temp, int l, int r) { ^%go\ C ;
int i, j, k; xd(AUl4qY
int mid = (l + r) / 2; &`@,mUi{Ac
if (l == r) ><\mt
return; )KXLL;]
if ((mid - l) >= THRESHOLD) 9!2KpuWji
mergeSort(data, temp, l, mid); w$Dp m.0(
else q n=6>wP
insertSort(data, l, mid - l + 1); ]lz,?izMR
if ((r - mid) > THRESHOLD) \VtCkb
mergeSort(data, temp, mid + 1, r); E'MMhlo
else $23="Jcl
insertSort(data, mid + 1, r - mid); iY;)R|6
Ao{wd1
for (i = l; i <= mid; i++) { 1O(fI|gcO
temp = data; ]NTHit^EX
} K<|b>PI.s
for (j = 1; j <= r - mid; j++) { m?[F)<~a
temp[r - j + 1] = data[j + mid]; s<<vHzm
} !m_'<=)B4~
int a = temp[l]; 4RTEXoXs
int b = temp[r]; !29 Rl`9
for (i = l, j = r, k = l; k <= r; k++) { &]#D`u
if (a < b) { ~0/=5 dC
data[k] = temp[i++]; v`wPdb
a = temp; QZh8l-!#5
} else { OmU.9PDg-
data[k] = temp[j--]; x!I7vs~~zW
b = temp[j]; QQC0uta`
} 0Fbq/63
} ]j1BEO!Bg
} {jk {K6 }
!*CL>}-,
/** UK_2i(I"e
* @param data VaX>tUW
* @param l \9ap$
* @param i i~K~Czmok+
*/ |$1j;#h
private void insertSort(int[] data, int start, int len) { Ui?t@.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =faV,o&{`
} o<C~67o_
} ENqJ9%sk7
} xhimRi
} $]Fe9E?
ia?8Z"&lK
堆排序： ,j5fzA
[k1N`K(M
package org.rut.util.algorithm.support; Kx<bVK4"
c-s ~q/
import org.rut.util.algorithm.SortUtil; qPzgGbmD9
H 5sj% v
/** :SYg)|s
* @author treeroot D, 3x:nK
* @since 2006-2-2 ^-=,q.[7
* @version 1.0 T[<9Ty'^
*/ a<vCAFQ
public class HeapSort implements SortUtil.Sort{ Gia_B6*Y[
|@d7o]eM|
/* (non-Javadoc) :L\@+}{(c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ri\r%x
*/ a&y%|Gs^f
public void sort(int[] data) { sq :ff
MaxHeap h=new MaxHeap(); >nTGvLOq
h.init(data); iLS'47
for(int i=0;i h.remove(); :r#FI".qx
System.arraycopy(h.queue,1,data,0,data.length); {)k}dr
} uFECfh
V1"+4&R^T_
private static class MaxHeap{ ]1p&*xX:Bj
WH'[~O
void init(int[] data){ .Olq_wuH
this.queue=new int[data.length+1]; 3YRhqp"E
for(int i=0;i queue[++size]=data; #M8"b]oh6
fixUp(size); )8e_<^M
} .s,hl(w,
} Fdvex$r&
BBy/bc!
private int size=0; lfWxdi
nDaQ1
private int[] queue; c t,p?[Q
2&5"m;<
public int get() { m: w/[|_
return queue[1]; N5oao'7|A
} #ljfcQm
+]*?J1Y8Z
public void remove() { H\)on"
SortUtil.swap(queue,1,size--); \.Q"fd?a_D
fixDown(1); <PJwBA%{
} ^V>sNR
file://fixdown [h,T.zpa
private void fixDown(int k) { G?8,&jP~T
int j; #nn2odR
while ((j = k << 1) <= size) { J}<k`af
if (j < size %26amp;%26amp; queue[j] j++; O7q-MeMM
if (queue[k]>queue[j]) file://不用交换 aA0aW=R
break; KWhw@y-5j@
SortUtil.swap(queue,j,k); Ks!.$y:x
k = j; Po=)jkW
} :^?ZVi59j
} ZYkeW
private void fixUp(int k) { m"@M~~bh
while (k > 1) { <W\~A$
int j = k >> 1; k(hes3JV
if (queue[j]>queue[k]) P1H`NOC
break; DA[-( s
SortUtil.swap(queue,j,k); nG{jx_{`
k = j; O/l|\n
} !L-.bve!
} '{U56^b]
&~^"yo#b
} g8}/Ln*W'
uVOOw&q_
} )Q(tryiSi
+Bc/@.Q'
SortUtil： B2&fvv?
Wc03Sv&FZ
package org.rut.util.algorithm; =^=9z'u"=
&bnF{~<\
import org.rut.util.algorithm.support.BubbleSort; uXu'I
import org.rut.util.algorithm.support.HeapSort; PS(9?rX#+
import org.rut.util.algorithm.support.ImprovedMergeSort; 1 dI
import org.rut.util.algorithm.support.ImprovedQuickSort; ma?569Z8~0
import org.rut.util.algorithm.support.InsertSort; MdZ7Yep
import org.rut.util.algorithm.support.MergeSort; r'pFHX
import org.rut.util.algorithm.support.QuickSort; 6$@Pk<w
import org.rut.util.algorithm.support.SelectionSort; <hQ@]2w$
import org.rut.util.algorithm.support.ShellSort; 'Ys"yY@
:3{@LOil^
/** yBht4"\Al
* @author treeroot esbxx##\
* @since 2006-2-2 x\;`x$3t
* @version 1.0 BP*gnXj
*/ \f0I:%-
public class SortUtil { Lg_y1Mu7o
public final static int INSERT = 1; pShSKRg
public final static int BUBBLE = 2; #qm<4]91
public final static int SELECTION = 3; aztP`S$h
public final static int SHELL = 4; SM![ yC
public final static int QUICK = 5; 3 +BPqhzf
public final static int IMPROVED_QUICK = 6; RYS]b[-xZz
public final static int MERGE = 7; htlsU*x
public final static int IMPROVED_MERGE = 8; fC]+C(*d
public final static int HEAP = 9; ]n\WCU]0
:a#]"z0
public static void sort(int[] data) { 1:q55!b
sort(data, IMPROVED_QUICK); RAXqRP,iw
} =EsKFt"
private static String[] name={ nLQ 3s3@1>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f9&D0x?
}; VH,k EbJ
bq<QUw=]q&
private static Sort[] impl=new Sort[]{ B58H7NH ;G
new InsertSort(), X f!Bsp#\g
new BubbleSort(), peR=J7
new SelectionSort(), -H'_%~OV(
new ShellSort(), JR'Q Th:z
new QuickSort(), ^X"G~#v=q
new ImprovedQuickSort(), ;QREwT~H
new MergeSort(), =n9adq
new ImprovedMergeSort(), Nd^9.6,JU
new HeapSort() 4#;rv$ {
}; jr"yIC_
h_*=_2|}
public static String toString(int algorithm){ Xdq2.:\
return name[algorithm-1]; Y@M=6G
} \C/`?"4w
!ny;YV
public static void sort(int[] data, int algorithm) { sjWhtd[fgG
impl[algorithm-1].sort(data); 3f eI
} 8Tt2T} Y
DY~~pi~
public static interface Sort { *z` {$hc
public void sort(int[] data); V1xpJ
} `:i|y
UyD=x(li
public static void swap(int[] data, int i, int j) { <4C`^p
int temp = data; :NA cad
data = data[j]; Q%o
data[j] = temp; q+WOnTS
} _+z@Qn?#6h
} JjyQ