[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; $."Fz x
} #<G:&
int i1=l; `5n^DP*X
int i2=mid+1; SeuDJxqopD
for(int cur=l;cur<=r;cur++){ }!"Cvu
if(i1==mid+1) 89t"2|9 u
data[cur]=temp[i2++]; /Mj|Px%
else if(i2>r) 2fXwJG'
data[cur]=temp[i1++]; 5 BeU/
else if(temp[i1] data[cur]=temp[i1++]; {\X$vaF
else TN<"X :x9
data[cur]=temp[i2++]; ^!$=(jh.
} n`!6EaD
} 8mt#S
&3SmTg %
} H9Vn(A8&`
,+X:#$
改进后的归并排序: J!">L+Zcx
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package org.rut.util.algorithm.support; $01~G?:]`
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import org.rut.util.algorithm.SortUtil; ilZQ/hOBH
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/** `l %,4qR
* @author treeroot ?xuWha@:
* @since 2006-2-2 :w)9(5
* @version 1.0 ;zd.KaS
*/ kOC0d,
public class ImprovedMergeSort implements SortUtil.Sort { -j1]H"-
*?A!`JpJn
private static final int THRESHOLD = 10; 'j!n
]W5p\(1g
/* `aA)n;{/2u
* (non-Javadoc) "~KTLf
* >_$_fB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I9xkqj
*/ FI~=A/:
public void sort(int[] data) { +G+1B6S
int[] temp=new int[data.length]; lqa~ZF*
mergeSort(data,temp,0,data.length-1); yqR]9"a
} mQ9shdvt-
uo(LZUjPbN
private void mergeSort(int[] data, int[] temp, int l, int r) { 6$l?D^{
int i, j, k; 24wr=5p]Q
int mid = (l + r) / 2; K[x=knFO
if (l == r) KOoV'YSC[(
return; 8idIJm%y
if ((mid - l) >= THRESHOLD) @LSX@V
mergeSort(data, temp, l, mid); u|k_OUTq
else y qK*E*
insertSort(data, l, mid - l + 1); (W}DMcuSd
if ((r - mid) > THRESHOLD) GL,[32~C
mergeSort(data, temp, mid + 1, r); e [6F }."c
else Ggy?5N7P
insertSort(data, mid + 1, r - mid); N^AlhR^
Spn)M79
for (i = l; i <= mid; i++) { \7%wJIeyx
temp = data; HVzkS|^F
} ;=1[D
for (j = 1; j <= r - mid; j++) { 4UK>Vzn
temp[r - j + 1] = data[j + mid]; fPstSez
} F!w|5,)
int a = temp[l]; KTwP.!<v
int b = temp[r]; GkI{7GD:z
for (i = l, j = r, k = l; k <= r; k++) { cob??|,\m
if (a < b) { Vv+ oq5hf
data[k] = temp[i++]; =#A/d`2 b
a = temp; y\[q2M<
} else { ?b93! Q1
data[k] = temp[j--]; nB]mj_)R^
b = temp[j]; 1&vR7z]*
} Wtp=1
} #%L_wJB-
} o/[Ks;l
1QnaZhu'
/** ):A.A,skf
* @param data _;:_ !`
* @param l }:QoYNq
* @param i N vTp1kI]
*/ G:`So
private void insertSort(int[] data, int start, int len) { NG23
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W|(<z'S
} D&pX0
} *SlWA)9Y
} D-O{/
} ZI8@ 6L\
/!y;h-
堆排序： P# U|
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package org.rut.util.algorithm.support; Ps;4]=c
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import org.rut.util.algorithm.SortUtil; _H-Fm$Q
PO^#G@
/** rq\<zx]au
* @author treeroot UUa@7|x
* @since 2006-2-2 K$B~vy6E`
* @version 1.0 66$hdT$
*/ DF'~ #G8
public class HeapSort implements SortUtil.Sort{ hlz/TIP^N3
4/v[.5
/* (non-Javadoc) ~QUN O~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9l:[jsk<d
*/ BB ::zBg
public void sort(int[] data) { ZwiXeD+4
MaxHeap h=new MaxHeap(); Dtyw]|L\H
h.init(data); 8i<]$
for(int i=0;i h.remove(); c?aOX/C'
System.arraycopy(h.queue,1,data,0,data.length); 3JqGLR`z3
} fzAkUvo
)J2UNIgN
private static class MaxHeap{ DF-.|-^9I
sP~xe(
void init(int[] data){ J,s:CBCGL
this.queue=new int[data.length+1]; FMzG6nrdBN
for(int i=0;i queue[++size]=data; 6&L;Sw#Dg
fixUp(size); @\>7 wt_'
} P m&^rC;
} 5H|7DVG
6E(..fo:"
private int size=0; _c-(T&u<
0%,?z`UY
private int[] queue; @X9T"
+Fh,!`
public int get() { 3II*NANeg
return queue[1]; sE!g!ht
} u yE#EnsH
q-,`\ TS
public void remove() { D=Yr/qc?
SortUtil.swap(queue,1,size--); rV?@Kgxi
fixDown(1); C)UU/4a;
} 0kw)-)=
file://fixdown (m=1yj9
private void fixDown(int k) { Eb CK9
int j; A"R(?rQi=
while ((j = k << 1) <= size) { ][YuJUK8
if (j < size %26amp;%26amp; queue[j] j++; {M=*>P]E
if (queue[k]>queue[j]) file://不用交换 7s;;2<k;_
break; 7) af
SortUtil.swap(queue,j,k); a:4!z;2 |
k = j; i CB:p
} !1UZ<hq
} H^vA}F`
private void fixUp(int k) { u:B=lZ[
while (k > 1) { &5[+p{2
int j = k >> 1; E]S:F3
if (queue[j]>queue[k]) Prc1U)nfo
break; /x_AWnU
SortUtil.swap(queue,j,k); @2hOy@V
k = j; Y]5MM:mI
} `)MKCw$e
} fvV"H{V,
>;VZB/d
} #q-fRZ:P
TefPxvd
} /s+S\ djk
-"^xg"
SortUtil： rhly.f7N=A
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package org.rut.util.algorithm; LB9W.cA
T21?~jS
import org.rut.util.algorithm.support.BubbleSort; `0MQL@B
import org.rut.util.algorithm.support.HeapSort; !|- U,
import org.rut.util.algorithm.support.ImprovedMergeSort; zJ:%iL@
import org.rut.util.algorithm.support.ImprovedQuickSort; xuVc1jJH
import org.rut.util.algorithm.support.InsertSort; 17 0r5
import org.rut.util.algorithm.support.MergeSort; <'7s3
import org.rut.util.algorithm.support.QuickSort; x"cB8bZ!$
import org.rut.util.algorithm.support.SelectionSort; IYH4@v/#
import org.rut.util.algorithm.support.ShellSort; 5g$>J)Ry
1'8-+?r
/** mgM"u94-]
* @author treeroot xO,;4uE
* @since 2006-2-2 EWv[Sp
* @version 1.0 |WfL'_?$
*/ e"*ho[
public class SortUtil { !4 lN[
public final static int INSERT = 1; 4gWlSm)
public final static int BUBBLE = 2; Lw1[)Vk}E
public final static int SELECTION = 3; ]1W]
public final static int SHELL = 4; "<%J^Z9G
public final static int QUICK = 5; U6y`:G;.
public final static int IMPROVED_QUICK = 6; wfcR[
public final static int MERGE = 7; ;qr?[{G
public final static int IMPROVED_MERGE = 8; 6':Egh[;
public final static int HEAP = 9; w ykaf
6UL9+9[C
public static void sort(int[] data) { N.ZuSkRM
sort(data, IMPROVED_QUICK); 2"%f:?xV{
} /<%L&
private static String[] name={ SZ7; } r8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K@ &;f(Y
}; ASr@5uFR
AN|f:259
private static Sort[] impl=new Sort[]{ %L wq.
new InsertSort(), %Y5F@=>&
new BubbleSort(), 3f~znO
new SelectionSort(), 2iOYC0`!
new ShellSort(), ]D=fvvST
new QuickSort(), )%f]P<kq6
new ImprovedQuickSort(), 475g-t2"@
new MergeSort(), pK"Z9y&
new ImprovedMergeSort(), i XGy*#>V
new HeapSort() #v9+9X`1L
}; IY mkZ?cW
HS\'{4P
public static String toString(int algorithm){ bw+IH-b
return name[algorithm-1]; ?du*ITim
} ' ~fP#y
v\?l+-A?y
public static void sort(int[] data, int algorithm) { ;cp||uO
impl[algorithm-1].sort(data); CVEo<Tz
} D]|{xKC}
kc}|L9
public static interface Sort { AR&l9R[{N
public void sort(int[] data); zAJC-YC6
} "ctZ"*
2$A"{2G
public static void swap(int[] data, int i, int j) { J |UFuD
int temp = data; S-</(,E}|
data = data[j]; }m7$,'C%P
data[j] = temp; sOS^
} TqOH(={
} J(=y$8xje