[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; R:E6E@T
} <j:3<''o
int i1=l; XhWMvme
int i2=mid+1; l]sO[`X
for(int cur=l;cur<=r;cur++){ 4=o3ZRV
if(i1==mid+1) (pi7TSJ
data[cur]=temp[i2++]; z9w@-])
else if(i2>r) yC+N18y?
data[cur]=temp[i1++]; K ANE"M
else if(temp[i1] data[cur]=temp[i1++]; .Z%7+[
else px//q4U
data[cur]=temp[i2++]; n 'P:
} &0(2Z^Z>fw
} 7 aDI6G
S~(4q#Dt-
} &U4]hawbOU
<Cg;l<$`b
改进后的归并排序: `3pe\s
j@GMZz<
package org.rut.util.algorithm.support; m9#u.Q*
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import org.rut.util.algorithm.SortUtil; vbDw2
o<Y|N
/** 3C_g)5 _:
* @author treeroot )@R:$l86
* @since 2006-2-2 *ivbk /8
* @version 1.0 Zr}`W\
*/ pxI*vgfN7
public class ImprovedMergeSort implements SortUtil.Sort { (g7nMrE$j
2<ef&?ljk
private static final int THRESHOLD = 10; /R|"/B0
_& KaI }O
/* R)<Fqa7Tm
* (non-Javadoc) !~ -^s
* x-tA{_:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v|{*y
*/ X){F^1CT{
public void sort(int[] data) { et9c<'
int[] temp=new int[data.length]; hp,T(D|
mergeSort(data,temp,0,data.length-1); g:[&]o} :9
} 6Otv[8^}
U}gYZi;;$
private void mergeSort(int[] data, int[] temp, int l, int r) { JiI(?I
int i, j, k; ?MpGzCPa
int mid = (l + r) / 2; Q=^}B}G
if (l == r) ya:H{#%6
return; l' "<
if ((mid - l) >= THRESHOLD) Nz!AR$
mergeSort(data, temp, l, mid); &RROra
else >W-e0kkH
insertSort(data, l, mid - l + 1); D|=QsWZI
if ((r - mid) > THRESHOLD) 'O{hr0q}
mergeSort(data, temp, mid + 1, r); Jc:G7}j6
else PU-~7h+$
insertSort(data, mid + 1, r - mid); l_,8_u7G
P92:}" )*>
for (i = l; i <= mid; i++) { g^0
temp = data; "Ww^?"jQ)
} cst=ms
for (j = 1; j <= r - mid; j++) { "K\Rq+si
temp[r - j + 1] = data[j + mid]; nF=Ig-NX^
} 4a!L/m*
int a = temp[l]; jU4Ir{f
int b = temp[r]; zcxG%? Q
for (i = l, j = r, k = l; k <= r; k++) { OVj,qL)
if (a < b) { 9 z3Iwl
data[k] = temp[i++]; YLFTf1G9
a = temp; r5s*"z
} else { }\gpO0Ox
data[k] = temp[j--]; mY`b|cS3p$
b = temp[j]; W]M[5p]*
} N#[/h96F
} 6PPvfD^
} \ g0
"4"L"lJ
/** R0/~) P
* @param data ZT^PL3j+
* @param l [Xz7.<0#U
* @param i Mm/GIa
*/ O$&p<~
private void insertSort(int[] data, int start, int len) { n"dT^ g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c!841~p(Q
} /,:32H
} 0f-gQD
} E* lqCh
} @l;f';+
O]~p)E
堆排序： x`o_&09;CG
hOwVm;:
package org.rut.util.algorithm.support; [6/%ynlP
;$%+TN
import org.rut.util.algorithm.SortUtil; r;Dl
;- cq#8S
/** wwpvmb
* @author treeroot Q0 ^?jh
* @since 2006-2-2 A$5!]+
* @version 1.0 -7pZRnv
*/ l[.pI];T
public class HeapSort implements SortUtil.Sort{ !MGQ+bD6
Y.}n,y|J}
/* (non-Javadoc) \}<nXn!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]"YG7|EU
*/ i\t4TdEx(
public void sort(int[] data) { nKHyq\
MaxHeap h=new MaxHeap(); ?VzST }
h.init(data); L~0B
for(int i=0;i h.remove(); FvvF4 ,e5
System.arraycopy(h.queue,1,data,0,data.length); JgxOxZS`@
} IGbQ L
J7l1-
private static class MaxHeap{ ZM)a4h,kcm
TI*uNS;-
void init(int[] data){ UnO -?
this.queue=new int[data.length+1]; 1$ l3-x
for(int i=0;i queue[++size]=data; `Y(/G"]
fixUp(size); ChBZGuO:
} XS1>ti|<
} /sYD+*a
BGA.8qWR4
private int size=0; )P,jpE8
Qp<6qM35
private int[] queue; "1l d4/
7Y$p3]0e+
public int get() { 4{J%`H`Q!
return queue[1]; _y8)jD"
} 7pGlbdS
0&w.QoZY(
public void remove() { :ox+WY
SortUtil.swap(queue,1,size--); aIm\tPbb
fixDown(1); 2?m'Dy'JE
} NDI|;
file://fixdown &1VC0"YJWy
private void fixDown(int k) { >Vg<J~[g
int j; ^WVr@6
while ((j = k << 1) <= size) { |#MA?oz3T
if (j < size %26amp;%26amp; queue[j] j++; JM!o(zbt
if (queue[k]>queue[j]) file://不用交换 ,I)/ V>u
break; ?p}m[9@
SortUtil.swap(queue,j,k); mT)iN`$Y@
k = j; C$?dkmIt
} #^eviF8
} Dpof~o,f
private void fixUp(int k) { T"dEa-O
while (k > 1) { paiF ah
int j = k >> 1; km8[azB o
if (queue[j]>queue[k]) +='.uc_
break; j[c|np4k\
SortUtil.swap(queue,j,k); SFh6'v'1N@
k = j; Z,Q)\W<'-
} P+oZS
} {E!$<A9
z?+N3p9
} *xt3mv/<z
OHH wcJ7N
} W**a\[~$
&%INfl>o7.
SortUtil： QPdhesrd-
fpzC#
package org.rut.util.algorithm; b~cN#w #
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import org.rut.util.algorithm.support.BubbleSort; ]X{LZYk
import org.rut.util.algorithm.support.HeapSort; 7zy6`OP
import org.rut.util.algorithm.support.ImprovedMergeSort; UB=I>
import org.rut.util.algorithm.support.ImprovedQuickSort; Au:Q4x.
import org.rut.util.algorithm.support.InsertSort; N0/DPZX7
import org.rut.util.algorithm.support.MergeSort; {aAA4.j^
import org.rut.util.algorithm.support.QuickSort; 347p2sK>
import org.rut.util.algorithm.support.SelectionSort; Ga$+x++'*
import org.rut.util.algorithm.support.ShellSort; wD"Y1?Mr
RXLD5$s^
/** @e+QGd;}
* @author treeroot <{7B ^'
* @since 2006-2-2 >8HcCG
* @version 1.0 [,$] %|6wt
*/ EubF`w$KWX
public class SortUtil { "ifYy>d
public final static int INSERT = 1; (|"KsGl
public final static int BUBBLE = 2; Bo_Ivhe[m
public final static int SELECTION = 3; h0d;a
public final static int SHELL = 4; i5q VQo
public final static int QUICK = 5; t%V!SvT8+
public final static int IMPROVED_QUICK = 6; CR&v z3\Q
public final static int MERGE = 7; vG69z&
public final static int IMPROVED_MERGE = 8; G2zfdgW${/
public final static int HEAP = 9; U,~\}$<I
JZ]4?_l
public static void sort(int[] data) { O| ) [j@7
sort(data, IMPROVED_QUICK); "i(k8+iK
} v&D^N9hy9
private static String[] name={ #jv~FR`4v^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5_x8!v
}; D:/^TEib
4(f[Z9 iZ]
private static Sort[] impl=new Sort[]{ YJ3aJ^m#E
new InsertSort(), :]v%6i.
new BubbleSort(), nGZZCsf <
new SelectionSort(), I>B-[QEC
new ShellSort(), *?VbN}g2
new QuickSort(), 4 >at#Zc
new ImprovedQuickSort(), T;IaVMFG|d
new MergeSort(), ]<V[H
new ImprovedMergeSort(), MuQyHEDF
new HeapSort() bx_`S#*N
}; ?suNA
}K!}6?17T
public static String toString(int algorithm){ p'M5]G
return name[algorithm-1]; [#.E=s+&
} m-dyvW+
AK]{^Hvz
public static void sort(int[] data, int algorithm) { ) wtVFG
impl[algorithm-1].sort(data); >7[. {Y
} ;Kob]b
01uMbtM
public static interface Sort { Y?a*-"
public void sort(int[] data); wC+_S*M-K
} $6kVhE!;
dbQUW#<Q
public static void swap(int[] data, int i, int j) { BT.;l I
int temp = data; \09eH[
data = data[j]; _~ZNX+4
data[j] = temp; /7/d u[P6
} OXd617
} B2w\