[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; fa;\4#
} t{| KL<d]
int i1=l; x-,+skZs
int i2=mid+1; v{"$:Z ow
for(int cur=l;cur<=r;cur++){ [84ss;.$
if(i1==mid+1) MJd!J]E6
data[cur]=temp[i2++]; Q}2aBU.f
else if(i2>r) J1T_wA_
data[cur]=temp[i1++]; oQ1>*[e<u
else if(temp[i1] data[cur]=temp[i1++]; [nB[]j<R*
else ^+^#KC8]W
data[cur]=temp[i2++]; anjU3j
} x4Mq{MrWp
} ,&rlt+wE
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} a.#`>
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改进后的归并排序: Ds? @LE|
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package org.rut.util.algorithm.support; Pk!RgoWF
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import org.rut.util.algorithm.SortUtil; \3LP@;Phn
`+[Ct08
/** I{U7BZy
* @author treeroot gE]6]L
* @since 2006-2-2 kHygif !I4
* @version 1.0 U}<5%"!;
*/ nj$TdwZbK
public class ImprovedMergeSort implements SortUtil.Sort { kAA1+rG
:*Lr(-N-
private static final int THRESHOLD = 10; 7)tkqfb]
~v"4;A6
/* @&p:J0hbp
* (non-Javadoc) awkPFA*c'
* >M=_:52.+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PTrKnuM\J_
*/ E1IT>_
public void sort(int[] data) { Ybo:2e
int[] temp=new int[data.length]; ce@1#}*
mergeSort(data,temp,0,data.length-1); }W^%5o87{
} >zFk}/
#d2XVpO[0
private void mergeSort(int[] data, int[] temp, int l, int r) { Hd]o?q\
int i, j, k; .\XFhOsa
int mid = (l + r) / 2; ^3"~ T
if (l == r) /k8Lu+OJ
return; .}!"J`{W
if ((mid - l) >= THRESHOLD) Z"j #kaXA
mergeSort(data, temp, l, mid); p5`iq~e9
else LK\L}<;1V
insertSort(data, l, mid - l + 1); yuIy?K
if ((r - mid) > THRESHOLD) Cw6\'p%l-\
mergeSort(data, temp, mid + 1, r); ])F*)U
else *?bOH5$@Nw
insertSort(data, mid + 1, r - mid); >G7dw1;
E/[>#%@i
for (i = l; i <= mid; i++) { q@k/"ee*?
temp = data; }z%fQbw
} Q*4{2oQ
for (j = 1; j <= r - mid; j++) { )E9[=4+*C$
temp[r - j + 1] = data[j + mid]; UMtnb:ek
} ac
int a = temp[l]; 8J|2b; Vf
int b = temp[r]; Nz/PAs7g6
for (i = l, j = r, k = l; k <= r; k++) { NULew]:5
if (a < b) { |i_+b@Lul
data[k] = temp[i++]; _y:-_q
a = temp; )Fk*'6
} else { 9o%k [n
data[k] = temp[j--]; e1cqzhI=nA
b = temp[j]; 8/W(jVO(-
} pmda9V4
} DO*rVs3'p[
} gOiZ8K!
ZHu"&&
/** >b\{y}[
* @param data `Iwl\x[A
* @param l xqm-m
* @param i /bdL.Y#V
*/ 0?V{u`*
private void insertSort(int[] data, int start, int len) { 0zQ~'x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mIW8K ):
} 75v7w
} N+lhztYQ?
} eX`wQoV%
} }2xgm9j<
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堆排序： "w7{,HP
5Z;iK(>IX
package org.rut.util.algorithm.support; v']Tusmg
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import org.rut.util.algorithm.SortUtil; 1S[4@rZ
U:r^4,Mz*
/** p :{,~ 1
* @author treeroot :m]KVcF.
* @since 2006-2-2 ql/K$#u
* @version 1.0 )6U6~!k
*/ q@i>)nC R
public class HeapSort implements SortUtil.Sort{ ]S0=&x@,
M!i["($_
/* (non-Javadoc) M r-l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vh?5
*/ SfSWjq
public void sort(int[] data) { #,[z}fq
MaxHeap h=new MaxHeap(); hTc :'vq
h.init(data); g"{`g6(+
for(int i=0;i h.remove(); Kz~E"?
System.arraycopy(h.queue,1,data,0,data.length); C6"{-{H
} / jLb{Ky
]hMs:$}
private static class MaxHeap{ g3|k-
kxQ al
void init(int[] data){ `}:pUf
this.queue=new int[data.length+1]; -,186ZVZ
for(int i=0;i queue[++size]=data; 4 :phq
fixUp(size); r\A|fiL
} ppuJC'GW
} Y sDai<
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private int size=0; t5CJG'!ql
.TeGA;
private int[] queue; 5X PoQ^
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public int get() { :]icW^%
return queue[1]; aH7@:=B
} "M;[c9
'2qbIYanh
public void remove() { [_`<<!u>-
SortUtil.swap(queue,1,size--); s .@Szq
fixDown(1); qXprD.; }
} qP[_!C.
file://fixdown I)\{?LdHR
private void fixDown(int k) { nP&6i5s%
int j; xsIfR3Ze9
while ((j = k << 1) <= size) { J``5;%TJp
if (j < size %26amp;%26amp; queue[j] j++; eN'b"_D
if (queue[k]>queue[j]) file://不用交换 6W<Ig;
break; a8YFH$Xh
SortUtil.swap(queue,j,k); !a4`SjOgu
k = j; ')T*cLQ><
} ]`q]\EH
} y*Gq VA[
private void fixUp(int k) { ^V~^[Yp
while (k > 1) { R5i xG9
int j = k >> 1; _'|C-j`u$
if (queue[j]>queue[k]) *V_b/Vt
break; ef@F!s_fI
SortUtil.swap(queue,j,k); SB|Cr:wM
k = j; Sc ijf 9
} >guX,hx^
} 8Ow#W5_3|
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} >E7s}bL"
4~AY: ib|
} >uo=0=9=
i# fvF)
SortUtil： HJ!!"
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package org.rut.util.algorithm; ?pdN!zOeL
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import org.rut.util.algorithm.support.BubbleSort; th{ie2$
import org.rut.util.algorithm.support.HeapSort; E9w"?_A)
import org.rut.util.algorithm.support.ImprovedMergeSort; IrIW>r} -
import org.rut.util.algorithm.support.ImprovedQuickSort; l*Q OM
import org.rut.util.algorithm.support.InsertSort; |2GrOM&S
import org.rut.util.algorithm.support.MergeSort; ewdcAF5
import org.rut.util.algorithm.support.QuickSort; ^?: Az
import org.rut.util.algorithm.support.SelectionSort; 2q UX"a4
import org.rut.util.algorithm.support.ShellSort; u/CR7Y
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/** 8.&P4u i
* @author treeroot /!_FE+
* @since 2006-2-2 &k`/jl;u
* @version 1.0 rM4Ri}bS
*/ cpPS8V
public class SortUtil { m2l0`l~T8
public final static int INSERT = 1; 9&HaEAme
public final static int BUBBLE = 2; EUq6) K
public final static int SELECTION = 3; )afH:
public final static int SHELL = 4; u= Ga}
public final static int QUICK = 5; 1]W8A.ZS
public final static int IMPROVED_QUICK = 6; f7a"}.D$
public final static int MERGE = 7; [U$`nnp
public final static int IMPROVED_MERGE = 8; 3t5WwrNh
public final static int HEAP = 9; A9WOu*G1O
&?I3xzvK
public static void sort(int[] data) { BwYR"
sort(data, IMPROVED_QUICK); H? %I((+
} bo??91B^7
private static String[] name={ "HLh3L~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5>:p'zI
}; Va4AE)[/*
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private static Sort[] impl=new Sort[]{ KfSbm?
new InsertSort(), qL$\[(
new BubbleSort(), !95Q4WH-@
new SelectionSort(), 3W[Ps?G
new ShellSort(), 8SBa w'a
new QuickSort(), )7m.n%B!5V
new ImprovedQuickSort(), KhPDXY]!
new MergeSort(), lrgvY>E0
new ImprovedMergeSort(), /GA-1cS_(
new HeapSort() 5r0Sl89J
}; !MOcF5M
PkOtg[Z
public static String toString(int algorithm){ ZC&~InN
return name[algorithm-1]; 9?|m ^
} .4!wp&
^fU,9
public static void sort(int[] data, int algorithm) { }]pOR&o
impl[algorithm-1].sort(data); 0a+U >S#
} C?rb}(m
']sIU;h3
public static interface Sort { ZV!*ZpTe~
public void sort(int[] data); 9x14I2
} Ut(BQM>U+$
b:&=W>r
public static void swap(int[] data, int i, int j) { >BjZ{7?Ok
int temp = data; hAB:;r XlI
data = data[j]; bR=TGL&
data[j] = temp; Z"G?+gM@
} ^.[+)0I
} oTeQY[%$