[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; A6 .wXv,
} $.kJBRgV*
int i1=l; L-:@Om!
int i2=mid+1; m2"e ]I
for(int cur=l;cur<=r;cur++){ *!JB^5(H
if(i1==mid+1) 09anQHa
data[cur]=temp[i2++]; \>pm (gF
else if(i2>r) QK#wsw
data[cur]=temp[i1++]; nw%9Qw
else if(temp[i1] data[cur]=temp[i1++]; p/RT*?<
else 'Etq;^H
data[cur]=temp[i2++]; (xN1?qXB.
} Q!qD3<?5
} *Cf!p\7!
T@i* F M
} NN=^4Xpc:
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改进后的归并排序: KK3iui
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package org.rut.util.algorithm.support; YI;iG[T,&
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import org.rut.util.algorithm.SortUtil; aA52Li
P_NF;v5v
/** ~gW^9nWYU
* @author treeroot d)bsyZ;U
* @since 2006-2-2 :>;F4gGVG
* @version 1.0 r~h#
*/ K)!^NT
public class ImprovedMergeSort implements SortUtil.Sort { R'zi#FeP
.?Y"o3
private static final int THRESHOLD = 10; *9$SFe|&n:
.,p=e$x]
/* #"rK1Z
* (non-Javadoc) ~=iH*AQR
* zD<W`_z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <{bxOr+
*/ Q2- lHn^L:
public void sort(int[] data) { *j&)=8Y|
int[] temp=new int[data.length]; Z:7eroZP
mergeSort(data,temp,0,data.length-1); B+U:=591
} WEe7\bWF
+Tu?PuT7k
private void mergeSort(int[] data, int[] temp, int l, int r) { Jj+Q2D:
int i, j, k; -u'"l(n)~
int mid = (l + r) / 2; T9w=k)
if (l == r) rG6G~|mS
return; irD5;xk([
if ((mid - l) >= THRESHOLD) l#1#3F
mergeSort(data, temp, l, mid); [. 9[?8
else 1J/'R37lP
insertSort(data, l, mid - l + 1); 2O[sRm)
if ((r - mid) > THRESHOLD) =hFY-~U
mergeSort(data, temp, mid + 1, r); $7DW-TA
else "QNQ00[T`>
insertSort(data, mid + 1, r - mid); w/ rQOHV{
y42Cg
for (i = l; i <= mid; i++) { aMY@**^v
temp = data; ~[t#$2d}
} 3MNM<Ih
for (j = 1; j <= r - mid; j++) { "W%YsN0
temp[r - j + 1] = data[j + mid]; A| A#|D
} wV==sV
int a = temp[l]; C&H'?0Y@
int b = temp[r]; Fy Ih\
for (i = l, j = r, k = l; k <= r; k++) { J'|=J
if (a < b) { jb&MC2
data[k] = temp[i++]; s$hO/INr
a = temp; v{ >3)$1
} else { JOY&YA$U
data[k] = temp[j--]; U?:P7YWy
b = temp[j]; Oa~ThbX7
} *}lLV.+A
} [QgP6f]=
} }#H,oy;Dz
!Z:XSF[T
/** ^wd@mWxx
* @param data mXp#6'a
* @param l X'PZCg W
* @param i S \]O8#OX
*/ d7vPZ_j^z
private void insertSort(int[] data, int start, int len) { I@ueeDY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'Y)aGH(
} &=kv69v
} 2@6@|jRG
} `_OrBu[
} 8A3/@Z;0S
#\lvzMjCC
堆排序： "x=\mA#`
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package org.rut.util.algorithm.support; T3zovnR
]5f;Kz)
import org.rut.util.algorithm.SortUtil; {V QGfN
f_S$CFa@
/** 6Bjo9,L
* @author treeroot r9_ ON|
* @since 2006-2-2 CZ3oX#b
* @version 1.0 >z\IO
*/ C(G.yd
public class HeapSort implements SortUtil.Sort{ p!YK~cH[
zx}+Q B0
/* (non-Javadoc) !2Nk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xjo`u:BH
*/ )DXt_leLg
public void sort(int[] data) { <3B^5p\/
MaxHeap h=new MaxHeap(); kPs?
h.init(data); KM?4J6jH
for(int i=0;i h.remove(); Bgm8IK)6
System.arraycopy(h.queue,1,data,0,data.length); a(A~S u97
} /\/^= j
QLO;D)fC
private static class MaxHeap{ NLMvi!5w,
,w#lUgp
void init(int[] data){ R}0gIp=
this.queue=new int[data.length+1]; `;6M|5G
for(int i=0;i queue[++size]=data; ?CQE6ch
fixUp(size); _f%s]
} /@ @F nQ++
} ^~[7])}g6
vzg^tJ
private int size=0; Hloe7+5UD
^}-l["u`
private int[] queue; Qt+D ,X
larv6ncV
public int get() { Dz~0(
return queue[1]; PF`uwx@zH
} AfTm#-R
Df4O~j$U"s
public void remove() { &IUA[{o~e
SortUtil.swap(queue,1,size--); ~][~aEat;V
fixDown(1); 03fOm
} /(BS<A
file://fixdown kzZgNv#G;
private void fixDown(int k) { `}),wBq
int j; zVS{X=u
while ((j = k << 1) <= size) { g9pKoi|\E
if (j < size %26amp;%26amp; queue[j] j++; ]jhi"BM
if (queue[k]>queue[j]) file://不用交换 I3nE]OcW@
break; hH1Q:}a
SortUtil.swap(queue,j,k); _s^tL2Pc
k = j; l[T-Ak
} )4ek!G]Rb
} ]2@(^x'=
private void fixUp(int k) { >`x|E-X"
while (k > 1) { qIZ+%ZOu
int j = k >> 1; pWRdI_
if (queue[j]>queue[k]) 0vqH-)}
break; y$R8J:5f
SortUtil.swap(queue,j,k); 9A.NM+u7
k = j; ]20:8l'
} M +OVqTsFU
} uQW)pD{_
.:j{d}p}
} q0+N#$g#
o!BCR:
} LLTr+@lj
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SortUtil： *1dZs~_
W8g13oAu"
package org.rut.util.algorithm; }'P|A
uBww
import org.rut.util.algorithm.support.BubbleSort; 4~Cf_`X}]
import org.rut.util.algorithm.support.HeapSort; Jq` Dvz
import org.rut.util.algorithm.support.ImprovedMergeSort; Gky*EY
import org.rut.util.algorithm.support.ImprovedQuickSort; m-O*t$6
import org.rut.util.algorithm.support.InsertSort; j_rO_m<8
import org.rut.util.algorithm.support.MergeSort; %6cr4}Zm}
import org.rut.util.algorithm.support.QuickSort; `C>h]H(
import org.rut.util.algorithm.support.SelectionSort; pqO3(2F9
import org.rut.util.algorithm.support.ShellSort; bDvGFSAH
j>JBZ#g
/** E^rBs2;9
* @author treeroot bKS/T^UQ
* @since 2006-2-2 EcHZmf
* @version 1.0 I'P|:XKI
*/ _K9PA[m5~
public class SortUtil { 3J"`mQ
public final static int INSERT = 1; uN<=v&]q
public final static int BUBBLE = 2; (>0`e8v!
public final static int SELECTION = 3; KcV"<9rE
public final static int SHELL = 4; z#Jw?K_
public final static int QUICK = 5; l5w^rj
public final static int IMPROVED_QUICK = 6; tQzbYzGb7
public final static int MERGE = 7; @M\JzV4 A[
public final static int IMPROVED_MERGE = 8; C,W@C
public final static int HEAP = 9; c:K/0zY
zdJPMNHg
public static void sort(int[] data) { Nt8"6k_
sort(data, IMPROVED_QUICK); \*CXXp`
} c_qox
private static String[] name={ LkJq Bg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 85# 3|5n
}; -`q!mdA2
LBG`DYR@
private static Sort[] impl=new Sort[]{ z\tY A
new InsertSort(), Q+Nnj(AQY
new BubbleSort(), @~2k5pa
new SelectionSort(), AIOGa<^
new ShellSort(), @].s^ss9_
new QuickSort(), b$Hbo;_
new ImprovedQuickSort(), v>K|hH
new MergeSort(), ;0WAfu}#H
new ImprovedMergeSort(), <T7@,_T
new HeapSort() S<]k0bC
}; Ia](CN*;6
c= 2E/x?
public static String toString(int algorithm){ C3 "EZe[R
return name[algorithm-1]; <IR@/b!,
} qsp3G7\'=
vhOh3
public static void sort(int[] data, int algorithm) { E~q3o*
impl[algorithm-1].sort(data); EO+Ix7w
} TQeIAy
;VCV%=W<
public static interface Sort { eW.qMx#:od
public void sort(int[] data); z&!o1uq
} JL_(%._J
`GqF/?i
public static void swap(int[] data, int i, int j) { XzV>q~I3|E
int temp = data; hRuiuGC
data = data[j]; !m\By%(
data[j] = temp; u*l>)_HD
} &S.p%Qe"
} w#9.U7@.