[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; p3r1lUw
} I NE,/a=
int i1=l; E~|`Q6&Y
int i2=mid+1; vDAv/l9
for(int cur=l;cur<=r;cur++){ 4c_F>Jw[
if(i1==mid+1) _\Cd.
data[cur]=temp[i2++]; UW[{Y|oE
else if(i2>r) ]Zf@NY
data[cur]=temp[i1++]; 2)^[SpZ
else if(temp[i1] data[cur]=temp[i1++]; !jDqRXi(
else 'k9hzk(*
data[cur]=temp[i2++]; Z0e+CEzq
} S hM}w/4
} _(\\>'1q!
sE8.,\
} "lf_`4
r4xq%hy
改进后的归并排序: ab 1\nzpd
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package org.rut.util.algorithm.support; g/q$;cB
;v6e2NacM'
import org.rut.util.algorithm.SortUtil; Te#wU e-|
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/** +Hb6j02#
* @author treeroot EtH)E)
* @since 2006-2-2 NwG&uc+Q
* @version 1.0 B!le=V,@,
*/ ~^"cq S(
public class ImprovedMergeSort implements SortUtil.Sort { .6E7 R
!+M H?A
private static final int THRESHOLD = 10; t@/r1u|iq
,9#G/nF
/* g-%uw[pf
* (non-Javadoc) V]PTAhc
* *qG=p`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "7)F";_(^
*/ C_#0Y_O
public void sort(int[] data) { ^D B0C
int[] temp=new int[data.length]; $}k"wI[
mergeSort(data,temp,0,data.length-1); |U^ ff^]
} ){>;eky
X5U!25d]
private void mergeSort(int[] data, int[] temp, int l, int r) { KX<RD|=
int i, j, k; $vy.BYFm
int mid = (l + r) / 2; D2!ww{t
if (l == r) {djOU 9]
return; J&a887
if ((mid - l) >= THRESHOLD) q{7s.m >
mergeSort(data, temp, l, mid); 66'TdF]"
else ]hvB-R16f
insertSort(data, l, mid - l + 1); o-O/MS
if ((r - mid) > THRESHOLD) 'KQuz)-
mergeSort(data, temp, mid + 1, r); &9s6p6eb
else T"d]QYJS
insertSort(data, mid + 1, r - mid); wOi>i`D&
Gcs+@7!b
for (i = l; i <= mid; i++) { }UGPEf\
temp = data; !Q7
} ]K9x<@!
for (j = 1; j <= r - mid; j++) { Z^fF^3x
temp[r - j + 1] = data[j + mid]; e('c9 Y
} 6!"15dPN
int a = temp[l]; L8j,?u#
int b = temp[r]; ao-C9|2>NU
for (i = l, j = r, k = l; k <= r; k++) { s\jLIrG8
if (a < b) { &6\rKOsn
data[k] = temp[i++]; CYrL|{M]
a = temp; t'Q48QAb?
} else { ;JmD(T7{
data[k] = temp[j--]; ;%jt;Xv9
b = temp[j]; [#Yyw8V#<
} 4_"ZSVq]#
} u%h<5WNh<
} Zh(f2urKV
_?r+SRFn
/** So8P8TCK
* @param data ^2??]R&Q
* @param l 1Xs!ew)>
* @param i ,5\n%J:
*/ 3?geJlD4
private void insertSort(int[] data, int start, int len) { k{bba=<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !c&^b@ yw
} 'Aqmf+Mm
} b]Y,& 8}[+
} bR6bS7$
} cu"%>>,,
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堆排序： >'T%=50YH
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package org.rut.util.algorithm.support; .6"7Xxe]<
9qW,I|G
import org.rut.util.algorithm.SortUtil; g/@CESfm'
)b7mzDp(
/** v8X&H
* @author treeroot )} #r"!
* @since 2006-2-2 }"8_$VDcz
* @version 1.0 M`<D Z<:<
*/ j>T''Tf
public class HeapSort implements SortUtil.Sort{ u<8Q[_E&
.Sn1YAhE
/* (non-Javadoc) b?^n'0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QCo^#-
*/ Gs6#aL}]R
public void sort(int[] data) { <#Lw.;(U;k
MaxHeap h=new MaxHeap(); vuZ<'?Nm
h.init(data); at*=#?M1?
for(int i=0;i h.remove(); 6vA5L_
System.arraycopy(h.queue,1,data,0,data.length); cm3Y!p{p"
} CQ`(,F3(
s`B'vyoaa
private static class MaxHeap{ @CmxH(-i-
J$Q-1fjj
void init(int[] data){ }rE|\p>
this.queue=new int[data.length+1]; cTnbI4S;
for(int i=0;i queue[++size]=data; ,54<U~Lg:
fixUp(size); O>GP>U?]
} MH?B.2
} T42g4j/l~
w(j9[
private int size=0; Vk (bU=w
^sKXn:)
private int[] queue; >DRs(~|V#
@_Zx'mTI
public int get() { B<LavX>F
return queue[1]; ["}A#cO652
} fq|2E&&v
*eP4dGe&
public void remove() { | #Pc e
SortUtil.swap(queue,1,size--); "{_"NjH
fixDown(1); FQFENq''B
} v~\45eEA
file://fixdown I[UA' ~f
private void fixDown(int k) { \bOjb\ w$
int j; ?/(K7>`
while ((j = k << 1) <= size) { pL@zZK0
if (j < size %26amp;%26amp; queue[j] j++; hYn'uL^~[
if (queue[k]>queue[j]) file://不用交换 kPH^X}O$
break; \6hL W_q1
SortUtil.swap(queue,j,k); 3ms/v:\
k = j; j6vZ{Fx;w
} (NdgF+'=
} _,FoXf7
private void fixUp(int k) { noA\5&hqW
while (k > 1) { 2.D!4+&
int j = k >> 1; \bic.0-
if (queue[j]>queue[k]) dV{Hn {(
break; d~jtWd|?
SortUtil.swap(queue,j,k); ?(q*U!=
k = j; =h::VB}Lv
} OLNn3 J
} l;*lPRoW,
]B3FTqR{i
} _]UDmn[C
m->%8{L
} 93IOG{OAY
xzl4v=7
SortUtil： LGROEn<*d
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package org.rut.util.algorithm; BhW]Oq&
1qj%a%R
import org.rut.util.algorithm.support.BubbleSort; &JhIn%=-
import org.rut.util.algorithm.support.HeapSort; hcd>A vC8
import org.rut.util.algorithm.support.ImprovedMergeSort; o+-Ge J
import org.rut.util.algorithm.support.ImprovedQuickSort; udD*E~1q
import org.rut.util.algorithm.support.InsertSort; 1LE^dS^V
import org.rut.util.algorithm.support.MergeSort; N~}v:rK>g
import org.rut.util.algorithm.support.QuickSort; h2|vB+W-
import org.rut.util.algorithm.support.SelectionSort; Da8$Is;n
import org.rut.util.algorithm.support.ShellSort; i %hn
{<}I9D5
/** tw4am.o1]
* @author treeroot |:=b9kv
* @since 2006-2-2 )fd-IYi-3
* @version 1.0 ?Y0$X>nm
*/ )_b@~fC
public class SortUtil { x-V' 0-#U>
public final static int INSERT = 1; /cL9?k;o
public final static int BUBBLE = 2; F*4Qa
public final static int SELECTION = 3; _WDBG
public final static int SHELL = 4; =o{: -EKQF
public final static int QUICK = 5; @0UwI%.
public final static int IMPROVED_QUICK = 6; Ife,h s
public final static int MERGE = 7; Sa[EnC
public final static int IMPROVED_MERGE = 8; 8g# Y
public final static int HEAP = 9; mU?&\w=v$
v;bM.OL
public static void sort(int[] data) { vN0L(B
sort(data, IMPROVED_QUICK); .}$`+h8WT
} nXM9Px!
private static String[] name={ 2yJ7]+Jd7Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dS3>q<J*a
}; lk*0c{_L
'#McY'.D T
private static Sort[] impl=new Sort[]{ !X\sQNp
new InsertSort(), [L*[j.r7[
new BubbleSort(), <nOuyGIZ
new SelectionSort(), (EOec5qXU
new ShellSort(), Bt*&L[&57
new QuickSort(), Sr ztTfY
new ImprovedQuickSort(), ,<Grd5em.
new MergeSort(), uGP[l`f|FQ
new ImprovedMergeSort(), ]} 5I>l
new HeapSort() fz<|+(_>J
}; (sV]UGrZ
YoV^xl6g
public static String toString(int algorithm){ RR~sEUCo{
return name[algorithm-1]; r21?c|IP
} Y'<uZl^aX
E !Oz|q
public static void sort(int[] data, int algorithm) { {*M>X}voS
impl[algorithm-1].sort(data); DJ1XNpm
} 'uP'P#
.\ ;l-U
public static interface Sort { @b::6n/u
public void sort(int[] data); ]b0zkoD9<
} z`86-Ov
r%g <hT 8
public static void swap(int[] data, int i, int j) { K)Df}fVOc
int temp = data; vWqyZ-p,q
data = data[j]; (B>yaM#5
data[j] = temp; oglXW8
} VL_)]LR*)
} 'WKu0Yi^'