[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; H zK=UcD
} [-}%B0S**
int i1=l; e"09b<69
int i2=mid+1; "[Lp-4A\
for(int cur=l;cur<=r;cur++){ C3Z(k}
if(i1==mid+1) {-Oc8XI/
data[cur]=temp[i2++]; u"3cSuqy
else if(i2>r) lw lW.C
data[cur]=temp[i1++]; :7]R2JP
else if(temp[i1] data[cur]=temp[i1++]; BU .G~0
else qoq<dCt3
data[cur]=temp[i2++]; R5~m"bE
} A}}t86T
} O$ oN1
;L{y3CWT
} $9b6,Y_-
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改进后的归并排序: $O>MV
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package org.rut.util.algorithm.support; gKEvgXOj
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import org.rut.util.algorithm.SortUtil; 7[,f;zG
Hh/#pGf2
/** SQRz8,sqkw
* @author treeroot RozsRt;i
* @since 2006-2-2 !T1i_
* @version 1.0 $:P~21,
*/ cA^7}}?e
public class ImprovedMergeSort implements SortUtil.Sort { QpZhxp
0 N^V&k
private static final int THRESHOLD = 10; ?Io2lFvI@Y
eS+LFS7*k
/* .5zJ bZ9
* (non-Javadoc) ;]e"bX
* m)2U-3*iX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -M9 4 F
*/ 4df1)<}U-
public void sort(int[] data) { %iML??S
int[] temp=new int[data.length]; 4WnxJ]5`
mergeSort(data,temp,0,data.length-1); g9Ll>d)tE3
} L32ki}2
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private void mergeSort(int[] data, int[] temp, int l, int r) { `hhG^O_
int i, j, k; u-<s@^YG
int mid = (l + r) / 2; L~zet-3UNf
if (l == r) J)+eEmrU
return; +d15a%^`
if ((mid - l) >= THRESHOLD) !pXz-hxKT
mergeSort(data, temp, l, mid); (\_d'Js(;
else r +fzmb
insertSort(data, l, mid - l + 1); 3sNq3I
if ((r - mid) > THRESHOLD) "*WXr$
mergeSort(data, temp, mid + 1, r); hWJc A.A
else IVKE dwA
insertSort(data, mid + 1, r - mid); #,pLVt<
)BB a
for (i = l; i <= mid; i++) { we?#)9Q<
temp = data; MS)bhZvO
} _u!G6
for (j = 1; j <= r - mid; j++) { R["7%|RV
temp[r - j + 1] = data[j + mid]; C$;~=
} EtG)2)
int a = temp[l]; 1gr jK.x
int b = temp[r]; gr7_oJ:R
for (i = l, j = r, k = l; k <= r; k++) { cke[SUH,
if (a < b) { 4]R3*F
data[k] = temp[i++]; bvKi0-
a = temp; YWdvL3Bgk,
} else { _X/`4 G
data[k] = temp[j--]; )$i3j 1[;
b = temp[j]; D.}b<kDD
} : Dlk`?
} '{~ej:
} v|z1nD!?]
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/** ZvJx01F{
* @param data jTIn@Q
* @param l ^~od*:
* @param i bHNaaif}P
*/ ~+hG}7(:
private void insertSort(int[] data, int start, int len) { wz=I+IN:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gz:a1-x
} S7*:eo
} 5 Da(DA
} )*B.y|b#
} r+crE %-
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堆排序： Os;\\~e5
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package org.rut.util.algorithm.support; C0wq
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import org.rut.util.algorithm.SortUtil; aMWNZv
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/** MaM7u:kD#
* @author treeroot a6C~!{'nW
* @since 2006-2-2 n_j[hA
* @version 1.0 wim}}^H
*/ 8?!Vr1x
public class HeapSort implements SortUtil.Sort{ c`cPGEv
P? n`n!qZ
/* (non-Javadoc) c"r( l~fc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (H7q[UG|
*/ Vow+,,oh
public void sort(int[] data) { HV?@MBM
MaxHeap h=new MaxHeap(); h";sQ'us
h.init(data); !% Md9Mu!o
for(int i=0;i h.remove(); (nm&\b~j
System.arraycopy(h.queue,1,data,0,data.length); H^~!t{\
} i&#c+iTH
KAGq\7
private static class MaxHeap{ ~?FKww|_*J
9,IGZ55C
void init(int[] data){ T^ -RP
this.queue=new int[data.length+1]; x.I-z@\E
for(int i=0;i queue[++size]=data; cD]t%`*
fixUp(size); P=.W.oS
} ~rD* Y&#.
} I`7[0jA~
}j x{Cw
private int size=0; ESAh(A)8
xfilxd
private int[] queue; \BA_PyS?W+
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public int get() { {.AFg/Z
return queue[1]; 6aL`^^
} dJk.J9Z
!#QD;,SE+
public void remove() { :Fh*4 &Z
SortUtil.swap(queue,1,size--); LF8B5<[O
fixDown(1); H)Yv_gT
} AyWCb
file://fixdown 2B|3`trY4x
private void fixDown(int k) { #*fB~Os:
int j; iPao54Z
while ((j = k << 1) <= size) { =6'A8d
if (j < size %26amp;%26amp; queue[j] j++; c`TgxMu
if (queue[k]>queue[j]) file://不用交换 Xv9CD
break; };|'8'5
SortUtil.swap(queue,j,k); xZhh%~
k = j; 0z.&
} 7ORwDR,`5
} B; ~T|exu
private void fixUp(int k) { z[B7k%}
while (k > 1) { YS9|J=!~
int j = k >> 1; D .E>Y
if (queue[j]>queue[k]) -1[ri8t;nV
break; `ainJs:B
SortUtil.swap(queue,j,k); i^yQ; 2-
k = j; w] VvH"?
} T ^uBMDYe
} *<KY^;
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} a83o(9
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} lPjgBp{/
w!Z3EA;`
SortUtil： _:T\[sz5
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package org.rut.util.algorithm; C)`/Q(^
|@ia(U~
import org.rut.util.algorithm.support.BubbleSort; NWFZ:h@v
import org.rut.util.algorithm.support.HeapSort; I3A](`
import org.rut.util.algorithm.support.ImprovedMergeSort; >[[< 5$,T
import org.rut.util.algorithm.support.ImprovedQuickSort; {Tx+m;5F
import org.rut.util.algorithm.support.InsertSort; 27)$;1MT:
import org.rut.util.algorithm.support.MergeSort; l-5-Tf&j
import org.rut.util.algorithm.support.QuickSort; |(Sqd;#v
import org.rut.util.algorithm.support.SelectionSort; ^#;2 Pd>
import org.rut.util.algorithm.support.ShellSort; | r2'B
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/** [qc90)^Q,
* @author treeroot wEk9(|
* @since 2006-2-2 'kp:yI7w
* @version 1.0 |>m@]s7Z
*/ ?=6zgb"9-
public class SortUtil { ezFyd'P
public final static int INSERT = 1; (UpSi6?\
public final static int BUBBLE = 2; XMpPG~XdN
public final static int SELECTION = 3; @D%VV=N~[
public final static int SHELL = 4; 6x_8m^+m
public final static int QUICK = 5; F<oJ
public final static int IMPROVED_QUICK = 6; _TH'v:C
public final static int MERGE = 7; h|wyvYKZ
public final static int IMPROVED_MERGE = 8; Uj_%U2S$
public final static int HEAP = 9; =VDN9-/.
pDW .Pav
public static void sort(int[] data) { </7J:#
sort(data, IMPROVED_QUICK); +3VY0J
} j $L
private static String[] name={ %h^; "|Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bp9 u6R
}; a93Aj
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private static Sort[] impl=new Sort[]{ 6ZX{K1_q
new InsertSort(), PM,I?lJ,
new BubbleSort(), V;9.7v
new SelectionSort(), 233jT@Z
new ShellSort(), }6`#u:OZ
new QuickSort(), y/E%W/3
new ImprovedQuickSort(), q^EG'\<^
new MergeSort(), /1Ndir^c
new ImprovedMergeSort(), y "gYv
new HeapSort() s(-$|f+s
}; x-cg df
L_Om<LO2
public static String toString(int algorithm){ =ayl~"bW
return name[algorithm-1]; fi`*r\
} C4ge_u#
K-sJnQ23'
public static void sort(int[] data, int algorithm) { g\d|/HVK
impl[algorithm-1].sort(data); ge*f<#|0U-
} u`7\o~$
(FP- K
public static interface Sort { 7h0LR7
public void sort(int[] data); [8![UcMq
} p%8y!^g
^C_ ;uz
public static void swap(int[] data, int i, int j) { V4iN2
int temp = data; 0jG8Gmh!
data = data[j]; Z+JPxe#7
data[j] = temp; <$R'y6U:
} Z sv(/>
} *}Vg]3$4