[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; p)v|t/7
} djJD'JL
int i1=l; ?_)b[-N!
int i2=mid+1; V,:^@ 7d
for(int cur=l;cur<=r;cur++){ Tq{+9+
if(i1==mid+1) dZ}gf}.v
data[cur]=temp[i2++]; t66Cx
else if(i2>r) g<U\7Vp\1
data[cur]=temp[i1++]; YbAa@Sq@
else if(temp[i1] data[cur]=temp[i1++]; '/M9V{DD88
else Wd"<u2
data[cur]=temp[i2++]; l7#5.%A
} VZuluV
} !*Ex}K99
E| eEAa
} BV)oF2b:
ZD!?mR+-
改进后的归并排序: q_iPWmf p*
X)7_@,7
package org.rut.util.algorithm.support; !2L?8oP-z
N~NUBEKcp
import org.rut.util.algorithm.SortUtil; JC6?*R
"?9rJx$
/** tSibzl~
* @author treeroot "y~tAg
* @since 2006-2-2 R|&jvG=|
* @version 1.0 H.ha}0J
*/ g{PEplk
public class ImprovedMergeSort implements SortUtil.Sort { M;2@<,rM
|)~t^
private static final int THRESHOLD = 10; eka<mq|W
-)N,HAM>
/* >^Rkk{cc
* (non-Javadoc) 5<64 C}fE3
* ozaM!ee\z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PU8>.9x
*/ u%m,yPU~B
public void sort(int[] data) { JR6r3W
int[] temp=new int[data.length]; fh%|6k?#M
mergeSort(data,temp,0,data.length-1); U]Y</>xGI
} WSEw:pln
-sjyv/%_
private void mergeSort(int[] data, int[] temp, int l, int r) { )LC"rSNx%
int i, j, k; ,X`w/ 2O
int mid = (l + r) / 2; ya3k;j2C
if (l == r) YMSZcI
return; ,J;Cb}
if ((mid - l) >= THRESHOLD) @!'rsPrI
mergeSort(data, temp, l, mid); a4d7;~tZ
else z|Y Ms?
insertSort(data, l, mid - l + 1); L5[{taZ,
if ((r - mid) > THRESHOLD) ;f?suawMv
mergeSort(data, temp, mid + 1, r); ZLIt3
else c'|](vOd]
insertSort(data, mid + 1, r - mid); 5aZbNV}-
N 2XL5<
for (i = l; i <= mid; i++) { 4og/y0n,l"
temp = data; JjMa
} i}Q"'?
for (j = 1; j <= r - mid; j++) { W6c]a/
temp[r - j + 1] = data[j + mid]; njxfBA:
} 9{*$[%d1
int a = temp[l]; )kMF~S|H
int b = temp[r]; 0RZ[]:(
for (i = l, j = r, k = l; k <= r; k++) { Wn%b}{9Fb
if (a < b) { Cer&VMrQK
data[k] = temp[i++]; = Ed0vw
a = temp; X 0vcBHh
} else { g1kYL$o4
data[k] = temp[j--]; %T6 sm
b = temp[j]; ,A%p9
} 5Z@0XI
} )L/0X40<.
} ;kDUQw
\>$3'i=mQ
/** rP{Jep!
* @param data v<3KxP'a
* @param l =h\unQ1T
* @param i 'MgYSP<
*/ c/DK31K
private void insertSort(int[] data, int start, int len) { O!G!Gq&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zm!M'|~@7
} QYg V[\&
} q6'Q-e)
} lrjVD(R=g
} :%-w/QwTR
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堆排序： }el7@Gv
Xj9\:M-
package org.rut.util.algorithm.support; a[_IG-l|i4
${)oi:K@:
import org.rut.util.algorithm.SortUtil; 5pT8 }?7
p'`?CJq8
/** $\+x7"pI
* @author treeroot +70x0z2
* @since 2006-2-2 h+R26lI1x
* @version 1.0 Xf#+^cQ
*/ NDUH10Y:[
public class HeapSort implements SortUtil.Sort{ 9.%t9RM^
iE?yvtr8
/* (non-Javadoc) b>2{F6F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UgLFU#
*/ A.vf)hO
public void sort(int[] data) { PI.Zd1r
MaxHeap h=new MaxHeap(); QWc,JCu
h.init(data); xa'^:H $X
for(int i=0;i h.remove(); *Z$W"JP
System.arraycopy(h.queue,1,data,0,data.length); ck< `kJ`b
} ~t<G gNI
!bCSt?}@u
private static class MaxHeap{ j{j5TvsrY
G?v!Uv8O
void init(int[] data){ Q=61.lP6
this.queue=new int[data.length+1]; _N {4Rs0
for(int i=0;i queue[++size]=data; %8H$62w]
fixUp(size); uPq@6,+
} to'CuPkT
} $1$0M
M1]}yTCd
private int size=0; R< L =&I
fK6[ p&
private int[] queue; "}"/d(
qSGM6kb
public int get() { !1Hs;K
return queue[1]; ?fN6_x2e3
} 5 JlgnxRq
mlxtey6H3
public void remove() { Y&1N*@YP
SortUtil.swap(queue,1,size--); 3G[|4v?[<_
fixDown(1); "=w:LRw
} XzPOqZ`Nv
file://fixdown F$-fj "jC
private void fixDown(int k) { t.+)g-X
int j; #mU<]O
while ((j = k << 1) <= size) { #UE}JR3g
if (j < size %26amp;%26amp; queue[j] j++; 'ieTt_1.G
if (queue[k]>queue[j]) file://不用交换 !Rc %
break; cQ]c!G|a4
SortUtil.swap(queue,j,k); k'_f?_PBu
k = j; h% KEg667
} r.'xqzF/
} @ x .`z
private void fixUp(int k) { ;Xf1BG r
while (k > 1) { c`/VYgcTqB
int j = k >> 1; soLW'8
if (queue[j]>queue[k]) 9%Tqk"x?
break; Zs]n0iwM'@
SortUtil.swap(queue,j,k); {sf ,(.W
k = j; HUMy\u84H
} gV-*z}`U
} q1q9W@H
+;\w'dBi,
} }K={HW1>
'pT13RFD
} ? )h8uf4
Yn[>Y)
SortUtil： c9G%;U)
[-VK!9pQ
package org.rut.util.algorithm; $OG){'X
,oUzaEX
import org.rut.util.algorithm.support.BubbleSort; Z.&/,UU:4
import org.rut.util.algorithm.support.HeapSort; ]tXIe?>9
import org.rut.util.algorithm.support.ImprovedMergeSort; `<|tC#<z
import org.rut.util.algorithm.support.ImprovedQuickSort; \gA<yz-;N
import org.rut.util.algorithm.support.InsertSort; 0zA;%oP
import org.rut.util.algorithm.support.MergeSort; ilde<!?
import org.rut.util.algorithm.support.QuickSort; n 7i5A:
import org.rut.util.algorithm.support.SelectionSort; 0TaI"/ai
import org.rut.util.algorithm.support.ShellSort; ;<q2
!d<R=L
/** =%<, ^2o
* @author treeroot eM{u>n+`F0
* @since 2006-2-2 ?QmtZG.$
* @version 1.0 HHZw-/s,%
*/ "0uM%*2
public class SortUtil { .;Mb4"7=
public final static int INSERT = 1; tewp-MKA
public final static int BUBBLE = 2; <$yA*
public final static int SELECTION = 3; `u}_O(A1pA
public final static int SHELL = 4; mZ2CGOR
public final static int QUICK = 5; :{N*Z}]
public final static int IMPROVED_QUICK = 6; U#cGd\b
public final static int MERGE = 7; #Lpw8b6
public final static int IMPROVED_MERGE = 8; f]#\&"
public final static int HEAP = 9; u178vby;l
D{s87h
public static void sort(int[] data) { i%!<6K6UT
sort(data, IMPROVED_QUICK); pHoHngyi&
} r-wCAk}m*?
private static String[] name={ %'ah,2a%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4~3 n =T*
}; *~g*J^R}
1&! i:F#
private static Sort[] impl=new Sort[]{ (BPO*'
new InsertSort(), ~CT]&({
new BubbleSort(), >G8I X^*sG
new SelectionSort(), &:5*^1oP
new ShellSort(), >t)Pcf|s
new QuickSort(), C 2nmSXV
new ImprovedQuickSort(), {j9TzR
new MergeSort(), sWo}Xq#
new ImprovedMergeSort(), QK?V^E
new HeapSort() s2"`j-iQ
}; !p/SX>NJ
i_Hm?Bi!F
public static String toString(int algorithm){ gy%.+!4>v`
return name[algorithm-1]; Fy"M 4;7
} Et!J*{s
&n;*'M
public static void sort(int[] data, int algorithm) { {QM rgyQE
impl[algorithm-1].sort(data); EP#2it]0]
} )I[f(f%W7
`v!. ,Yr
public static interface Sort { %Y%r2
public void sort(int[] data); p~@,zetS
} h\UKm|BZ
3s/1\m%
public static void swap(int[] data, int i, int j) { L4Zt4Yuw
int temp = data; ~w3u(X$m"
data = data[j]; mP&\?
data[j] = temp; CdF;0A9.3
} =4MTb_
} tO{{ci$-T