[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; 2. NN8PPD"
} L^/5ux
int i1=l; u OmtyX
int i2=mid+1; gS!:+G%
for(int cur=l;cur<=r;cur++){ a_^\=&?'
if(i1==mid+1) kr^P6}'
data[cur]=temp[i2++]; fZGX}T<)p-
else if(i2>r) >NGj =L<
data[cur]=temp[i1++]; Y#ap*
else if(temp[i1] data[cur]=temp[i1++]; /Iu1L#
else A_"w^E{P
data[cur]=temp[i2++]; ^&9zw\x;z
} TM__I\+Q
} 0mYXv4 <
7~G9'P<
} R"/GQ`^AqA
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改进后的归并排序: "=HA Y
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package org.rut.util.algorithm.support; k$^UUo6
9R!atPz9
import org.rut.util.algorithm.SortUtil; CCs%%U/=
ch*8B(:
/** gmUz9P(
* @author treeroot (R,#a *CV
* @since 2006-2-2 CImWd.W9~
* @version 1.0 /*(Kr'c
*/ {r,.!;mHu
public class ImprovedMergeSort implements SortUtil.Sort { JMCKcZ%N
'&P%C" 5
private static final int THRESHOLD = 10; c8 )DuJ#U
}`@vF|2L
/* ^`i#$
* (non-Javadoc) etQCzYIhn
* ~p6 V,Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9Z$"K-G
*/ A7{\</Z
public void sort(int[] data) { ]6,\r"
int[] temp=new int[data.length]; "m):Y;9iQ?
mergeSort(data,temp,0,data.length-1); \k7"=yx
} Xz6<lLb
l ~"^7H?4e
private void mergeSort(int[] data, int[] temp, int l, int r) { olB.*#gA
int i, j, k; BiLY(1,
int mid = (l + r) / 2; @,j*wnR
if (l == r) /obfw^
return; vQG5*pR*w
if ((mid - l) >= THRESHOLD) Bpo4?nCl}
mergeSort(data, temp, l, mid); b<[Or^X ]
else 5+0gR &|j
insertSort(data, l, mid - l + 1); [-1^-bb
if ((r - mid) > THRESHOLD) 6?gW-1mY
mergeSort(data, temp, mid + 1, r); C\3rJy(VJ
else /|m2WxK)
insertSort(data, mid + 1, r - mid); ,$L4dF3
>0y'Rgfe
for (i = l; i <= mid; i++) { S/hQZHZHg,
temp = data; 3PWL@>zi
} bTNgjc
for (j = 1; j <= r - mid; j++) { J9nX"Sb
temp[r - j + 1] = data[j + mid]; dh\'<|\K
} gnf8l?M
int a = temp[l]; 8}x:`vDK
int b = temp[r]; pZ{+c
for (i = l, j = r, k = l; k <= r; k++) { ;6 D@A
if (a < b) { z]y.W`i
data[k] = temp[i++]; ,5p(T_V/
a = temp; j?\Qh
} else { Igt#V;kK"2
data[k] = temp[j--]; :K,i\
b = temp[j]; cxC6n%!;y
} 9MJG;+B~
} epe)a
} _Kf%\xg
|$Sedzj'
/** ]IQ&>z}<
* @param data VQt0 4?
* @param l A2Ed0|By
* @param i 9d659iC
*/ ibk6|pp
private void insertSort(int[] data, int start, int len) { wH&!W~M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;?iW%:_,
} 20h, ^
} CAWNDl4
} RWZSQ~
} 1N-\j0au
c ( C%Hld
堆排序： b94DJzL1z
#&aqKVY
package org.rut.util.algorithm.support; &)ChQZA
n5NsmVW\x
import org.rut.util.algorithm.SortUtil; 0RLg:SV
YnAm{YyI
/** ;bib/
* @author treeroot 7(8;to6(
* @since 2006-2-2 ^"2J]&x`G
* @version 1.0 !CT5!5T
*/ "?xHlYj@+
public class HeapSort implements SortUtil.Sort{ =s2*H8]
,!y$qVg'\f
/* (non-Javadoc) sIGMA$EK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xsbE TP?
*/ 7,o7Cf2z
public void sort(int[] data) { l<LI7Z]A
MaxHeap h=new MaxHeap(); <0&*9ZeD
h.init(data); JIOR4'9
for(int i=0;i h.remove(); WiR(;m<g
System.arraycopy(h.queue,1,data,0,data.length); ChPmX+.i_
} )~JHgl
cf20.F{<
private static class MaxHeap{ k"iOB-@B+
_op}1
void init(int[] data){ m@v\(rT.
this.queue=new int[data.length+1]; N +_t-5
for(int i=0;i queue[++size]=data; &.Qrs:U
fixUp(size); c9 _rmz8
} ,f'CD{E
} %RRNJf}z
joAv{Tc
private int size=0; C1n>M}b
xr Jg\to{i
private int[] queue; CxW>~O:
g@!V3V
public int get() { '4Bm;&6M
return queue[1]; vw/J8'
} zL0pw'4
@:vwb\azVD
public void remove() { sBg.u
SortUtil.swap(queue,1,size--); 21l;\W
fixDown(1); qt"m
} Y)2,PES=
file://fixdown AH7}/Rc
private void fixDown(int k) { XK@E;Rv
int j; rw JIx|(
while ((j = k << 1) <= size) { mNTzUoZF'@
if (j < size %26amp;%26amp; queue[j] j++; $G@5qxcV
if (queue[k]>queue[j]) file://不用交换 nMUw_7Y6
break; ^Y \"}D
SortUtil.swap(queue,j,k); K Z91-
k = j; ?NsW|w_
} vXZOy%$o
} 6?Ji7F
private void fixUp(int k) { xfe+n$~ c
while (k > 1) { nmKp[-5
int j = k >> 1; GGs}i1m
if (queue[j]>queue[k]) \Uq(Zga4)
break; ?%[@Qb=2
SortUtil.swap(queue,j,k); Qpc__dA\
k = j; $uVHSH5l
} yN(%-u"
} )Y{L&A
;iL#7NG-R
} YUy0!`!`
v`Oc,
} <R=Zs[9M1
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SortUtil： w_K1]<Q*
}Oq5tC@$G
package org.rut.util.algorithm; J}K$(;:
00~mOK;1
import org.rut.util.algorithm.support.BubbleSort; j{+.tIzpq[
import org.rut.util.algorithm.support.HeapSort; .|i.Cq8
import org.rut.util.algorithm.support.ImprovedMergeSort; e=m42vIB-
import org.rut.util.algorithm.support.ImprovedQuickSort; ],Do6 @M-
import org.rut.util.algorithm.support.InsertSort; $5%SNzzl
import org.rut.util.algorithm.support.MergeSort; z5*'{t)
import org.rut.util.algorithm.support.QuickSort; H8}oIA"b
import org.rut.util.algorithm.support.SelectionSort; LBDjIpR6
import org.rut.util.algorithm.support.ShellSort; Si;H0uPO
i2SR{e8:GF
/** 5D//*}b,
* @author treeroot 3{sVVq5Y
* @since 2006-2-2 v O_*yh1
* @version 1.0 G mA< g
*/ 3"~!nn0;
public class SortUtil { U26}gT)
public final static int INSERT = 1; ZyFjFHe+
public final static int BUBBLE = 2; )|#sfHv7
public final static int SELECTION = 3; ,/|T-Ka
public final static int SHELL = 4; lA8`l>I
public final static int QUICK = 5; \ta?b!Y),?
public final static int IMPROVED_QUICK = 6; z9Rp`z&`E
public final static int MERGE = 7; 1\I}2;
public final static int IMPROVED_MERGE = 8; $kp{Eg '
public final static int HEAP = 9; 4ID5q~
1tFNM[R
public static void sort(int[] data) { O)r4?<Q
sort(data, IMPROVED_QUICK); ds[|
} cTTL1SW
private static String[] name={ m^;f(IK5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i?^L/b`H
}; R~q]JSIC@
g{&ui.ml&
private static Sort[] impl=new Sort[]{ onxLyx|A
new InsertSort(), >}6%#CAf
new BubbleSort(), _E.>`Q
new SelectionSort(), ~oY^;/ j
new ShellSort(), s?L
new QuickSort(), &&>ekG9@
new ImprovedQuickSort(), 40m-ch6Q
new MergeSort(), ;>7De8v@@
new ImprovedMergeSort(), C1 *v,i
new HeapSort() >e$PP8&i_T
}; 9~[Y-cpoi
}:)&u|d_
public static String toString(int algorithm){ Qq|57X)P*
return name[algorithm-1]; |aq"#Ml)
} ]~3V}z,T*
|Z +=
public static void sort(int[] data, int algorithm) { 7J<5f)
impl[algorithm-1].sort(data); vUM4S26"NT
} iGB}Il)
E hMNap}5"
public static interface Sort { DN:EB@
public void sort(int[] data); [`7ThHX
} f._ua>v,f
1p=]hC
public static void swap(int[] data, int i, int j) { ?gGHj-HYJ
int temp = data; {R6ZKB
data = data[j]; U-M>=3|N
data[j] = temp; (<C3Vts))
} h~zT ydnH
} *J`O"a