[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; )@] W=
} @1U6sQ
int i1=l; [z6P]eC7
int i2=mid+1; Vt-V'`Y
for(int cur=l;cur<=r;cur++){ eu?P6>urA
if(i1==mid+1) d,Oe3?][0p
data[cur]=temp[i2++]; v- p8~u1N
else if(i2>r) >FJK$>[1:p
data[cur]=temp[i1++]; RRzLQ7J
else if(temp[i1] data[cur]=temp[i1++]; ~#)9Kl7<X
else bJkFCI/
data[cur]=temp[i2++]; 1lJ^$U
} 02)Ybp6y
} +UX} "m~W
2sVDv@2
} OL^DuoB4q
c8HETs1
改进后的归并排序: ywB0 D`s'
j&b<YPZ
package org.rut.util.algorithm.support; _Y$v=!fY&
!3o/c w9
import org.rut.util.algorithm.SortUtil; C4t~k
prB:E[1
/** Z-M4J;J@}
* @author treeroot 2wgcVQ Awa
* @since 2006-2-2 lTFo#p_(
* @version 1.0 "{d[V(lE"
*/ [4@@b"H
public class ImprovedMergeSort implements SortUtil.Sort { \jS^+Xf?^
f#hmMa
private static final int THRESHOLD = 10; ,u!_mV
W)Y:2P<.
/* !!mGsgnW
* (non-Javadoc) F5M{`:/
* yVJ)JhV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /Ao.b|mm
*/ Q5IN1 ^=HF
public void sort(int[] data) { QUF1_Sa
int[] temp=new int[data.length]; &4)PW\ioY
mergeSort(data,temp,0,data.length-1); 0UGAc]!/RZ
} 238z'I+$G/
zm4e+v-
private void mergeSort(int[] data, int[] temp, int l, int r) { =/4}!B/
int i, j, k; Tb*Q4:r"
int mid = (l + r) / 2; 2P{! n#"
if (l == r) \lyHQ-gWhc
return; BZjL\{IW
if ((mid - l) >= THRESHOLD) W9bpKmc
mergeSort(data, temp, l, mid); I;9DG8C&v*
else z5sKV7&\[n
insertSort(data, l, mid - l + 1); C\|HN=2eh
if ((r - mid) > THRESHOLD) qQS&K%F
mergeSort(data, temp, mid + 1, r); . ywVGBvJ
else 1KJ[&jS ]
insertSort(data, mid + 1, r - mid); M?kXzb\O
5RYrAzQo
for (i = l; i <= mid; i++) { 1-R4A7+3
temp = data; Bma.Uln
} "IWL& cH3
for (j = 1; j <= r - mid; j++) { w"A>mEex<
temp[r - j + 1] = data[j + mid]; "c![s%
} 9Z3Vf[n5\
int a = temp[l]; W=2]!%3#
int b = temp[r]; .tK]-f2
for (i = l, j = r, k = l; k <= r; k++) { clM6R
if (a < b) { Qr?(2t#
data[k] = temp[i++]; NIC.c3
a = temp; 9Dyy&$s
} else { q@Zeu\T,*#
data[k] = temp[j--]; lH"VLO2l
b = temp[j]; 1W9uWkk_d
} <u
} D@k#'KU
} '2{60t_A
ntZHO}'
/** j3>&Su>H4
* @param data 4*UKR!sr
* @param l R]o2_r7N"}
* @param i G@<[fO|Iam
*/ Su'l &]
private void insertSort(int[] data, int start, int len) { T\Jm=+]c!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @^HZTuP2;
} Tb] h<S
} W@~a#~1O
} \JNWL yw
} )=0@4
VxU{ZD~<Z"
堆排序： kQrby\F(<
cOP%R_ak?
package org.rut.util.algorithm.support; i^rHZmT
`<% w4E
import org.rut.util.algorithm.SortUtil; mrlhj8W?!
l585L3i
/** w}x&wWM
* @author treeroot 6O'Y@9#
* @since 2006-2-2 }jg,[jw_"X
* @version 1.0 *C^TCyBK;
*/ 6h\; U5
public class HeapSort implements SortUtil.Sort{ =z}M(<G
T`Xz*\}Zb
/* (non-Javadoc) &VVvZ@X;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [kI[qByf
*/ ,4(m.P10
public void sort(int[] data) { q]y{ 4"=5
MaxHeap h=new MaxHeap(); :/;;|lGw
h.init(data); eW[](lGWM
for(int i=0;i h.remove(); )U{IQE;T#
System.arraycopy(h.queue,1,data,0,data.length); \Zn~y--Z
} w X.]O!^X~
`V?NS,@$
private static class MaxHeap{ &=lhKt
` )~CT
void init(int[] data){ OL623jQX
this.queue=new int[data.length+1]; O{=@c96rl
for(int i=0;i queue[++size]=data; z>spRl,dr
fixUp(size); >W'"xK|:
} d*:J0J(
} $XFFNE`%
p{w;y6e
private int size=0; ,){WK|_
&GI'-i
private int[] queue; RP6hw|
gq+#=!(2
public int get() { 1xU)nXXb
return queue[1]; W1O Y}2kj
} et`rPK~m
r#^uY:T%
public void remove() { TZ PUVOtL_
SortUtil.swap(queue,1,size--); WhDNt+uk)
fixDown(1); uHyc7^X>
} 6H|&HV(!R
file://fixdown OC`Mzf%.
private void fixDown(int k) { {z8wFL\
int j; ]?hlpL
while ((j = k << 1) <= size) { GUsJF;;V
if (j < size %26amp;%26amp; queue[j] j++; .+-7 'ux
if (queue[k]>queue[j]) file://不用交换 <z{,@Z}
break; wPpern05
SortUtil.swap(queue,j,k); 3:gF4(.
k = j; hj3wxH.}
} #M:Vwn JX
} 2O0</^Z%E
private void fixUp(int k) { HH^yruP\}
while (k > 1) { Dfd%Z;Yu
int j = k >> 1; 4I;$a;R!
if (queue[j]>queue[k]) UFr5'T
break; 3n1 >+8
SortUtil.swap(queue,j,k); }/F9(m
k = j; k i{8f
} }yM!o`90
} Z]^O=kX7k
%eE 6\f%g
} t` zPx#])
q_0,KOGW
} a8Z{-=)
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SortUtil： @Y+9")?
c nV2}U/\
package org.rut.util.algorithm; '_o(I
$(pVE}J
import org.rut.util.algorithm.support.BubbleSort; 6/L34VH
import org.rut.util.algorithm.support.HeapSort; ] U[4r9V
import org.rut.util.algorithm.support.ImprovedMergeSort; oo!JAv}~
import org.rut.util.algorithm.support.ImprovedQuickSort; }zHG]k,j
import org.rut.util.algorithm.support.InsertSort; {OW.^UIq^
import org.rut.util.algorithm.support.MergeSort; Ba;tEF{X
import org.rut.util.algorithm.support.QuickSort; 2r#W#z%vS
import org.rut.util.algorithm.support.SelectionSort; <VmEXJIk
import org.rut.util.algorithm.support.ShellSort; ~ 6Hi"w
]Hrw$\Ky
/** l~GcD
* @author treeroot o1u?H4z
* @since 2006-2-2 AM4 :xz
* @version 1.0 :Pi="
*/ p}-B>v
public class SortUtil { -&r A<j
public final static int INSERT = 1; XE :JL_
public final static int BUBBLE = 2; +L#Q3}=s
public final static int SELECTION = 3; ,+E"s3NW
public final static int SHELL = 4; -2*Pm1\Z
public final static int QUICK = 5; o$,e#q)8
public final static int IMPROVED_QUICK = 6; GhY MO6Q4
public final static int MERGE = 7; rFYw6&;vOi
public final static int IMPROVED_MERGE = 8; R"[U<^
public final static int HEAP = 9; [!b=A:@
wRj&k(?*
public static void sort(int[] data) { v,,Dz8!Ty
sort(data, IMPROVED_QUICK); Y kcN-
} =BBDh`$R
private static String[] name={ &e1(|qax
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R}\n@X*
}; [xg&`x9,.
IHNl`\Le
private static Sort[] impl=new Sort[]{ J, vEZT<Mt
new InsertSort(), 6?KJ"Ai9
new BubbleSort(), EnXTL]=0S
new SelectionSort(), X##hSGQM
new ShellSort(), BW&)Zz
new QuickSort(), _.3O(?p,
new ImprovedQuickSort(), #Ue_
new MergeSort(), ]jwF[D
new ImprovedMergeSort(), UU]a).rz
new HeapSort() w:o,mzuXK
}; vrvOPLiQ
_0qp!-l}
public static String toString(int algorithm){ DsF<P@O6
return name[algorithm-1]; _tpqo>
} Y'2 |GJc2
;TG<$4N
public static void sort(int[] data, int algorithm) { yX|0R H
impl[algorithm-1].sort(data); /FA0(< -}
} SHP_
ER*Et+>
public static interface Sort { `'M}.q,k~
public void sort(int[] data); S%k](\7!
} 8zk?:?8%{
B&c*KaK;~
public static void swap(int[] data, int i, int j) { 44(l1xEN+
int temp = data; \*6Ld%:h$
data = data[j]; :sXn*k4v
data[j] = temp; uvj`r5ei
} B]5G"4,
} ".T&nS[z