[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; emSky-{$u
} (b;Kl1Ql]
int i1=l; Sx8RH),k
int i2=mid+1; @{>0v"@
for(int cur=l;cur<=r;cur++){ pC~M5(F_
if(i1==mid+1) -e4TqzRr
data[cur]=temp[i2++]; 1*GL;W~ix*
else if(i2>r) }el7@Gv
data[cur]=temp[i1++]; Xj9\:M-
else if(temp[i1] data[cur]=temp[i1++]; a[_IG-l|i4
else \ )WS^KR%
data[cur]=temp[i2++]; $35C1"
} riZ :#I
} \Up~"q>Kb
b4qMTRnv
} W3zYE3DZf
mBeP"GS
改进后的归并排序: t"s$YB>}
9:E:3%%
package org.rut.util.algorithm.support; h% eGtd$n
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import org.rut.util.algorithm.SortUtil; Zg%tN#6y
n:[@#xs-
/** p#%*z~ui
* @author treeroot _\8jnpT:
* @since 2006-2-2 '%X29B5
* @version 1.0 >4#:qIU
*/ #w3J+U 6r
public class ImprovedMergeSort implements SortUtil.Sort { '}^qz#w
}Y^o("c(
private static final int THRESHOLD = 10; >0z`H|;
h,?%,GI
/* *_Vv(H&
* (non-Javadoc) Lf)JO|o
* d#OAM;0}5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5T%2al,F`
*/ !w}b}+]GB
public void sort(int[] data) { j1;<3)%0
int[] temp=new int[data.length]; DRpFEWsm
mergeSort(data,temp,0,data.length-1); +[R^ ?~VK
} O{EPq' x
dF[|9%)
private void mergeSort(int[] data, int[] temp, int l, int r) { hF{gN3v5
int i, j, k; d>?C?F
int mid = (l + r) / 2; 9Fy'L#%
if (l == r) HSWki';G
return; {+m8^-T
if ((mid - l) >= THRESHOLD) ,CI-IR2
mergeSort(data, temp, l, mid); a>6D3n W
else -g."{|
insertSort(data, l, mid - l + 1); TQu.jC
if ((r - mid) > THRESHOLD) =w* 8
mergeSort(data, temp, mid + 1, r); =;4K5l{c
else ufe|I
insertSort(data, mid + 1, r - mid); 5E]iv^q%
p+8o'dl8=
for (i = l; i <= mid; i++) { IG{lr
temp = data; 'A>?aUq]:
} zYP6m3n
for (j = 1; j <= r - mid; j++) { }SC&6B?G
temp[r - j + 1] = data[j + mid]; K&n-(m%
} ttdY]+Fj
int a = temp[l]; Y0Tad?iC
int b = temp[r]; a4.w2GR
for (i = l, j = r, k = l; k <= r; k++) { Do77V5
if (a < b) { :tbgX;tCs5
data[k] = temp[i++]; Wsgp#W+
a = temp; qw$9i.Z
} else { <S=(`D
data[k] = temp[j--]; MhR`
b = temp[j]; RcO"k3J
} $E&T6=Wn
} 0%Le*C'yk
} c~4Cpy^
ZY8w1:'
/** tkH]_cH'w
* @param data g^Hf^%3xP
* @param l /@|iI<|
* @param i UWnF2,<s;
*/ /7])]vZ_
private void insertSort(int[] data, int start, int len) { Ka6u*:/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L}CU"
} 8{=|<
} OPzudO
} 4D2U,Ds
} bf@g*~h@
78{9@\e"0
堆排序： 4BUG\~eI3
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package org.rut.util.algorithm.support; v$0|\)E)
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import org.rut.util.algorithm.SortUtil; 4b[bj").A
O Bcz'f~
/** NTD1QJ
* @author treeroot zBl L98
* @since 2006-2-2 q01 L{~>bz
* @version 1.0 Arg/ge.y
*/ 5q*s_acQ
public class HeapSort implements SortUtil.Sort{ Ea&NJ]& g
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/* (non-Javadoc) `kuu}YUi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a7c`[
*/ /='0W3+o*L
public void sort(int[] data) { U+*l!"O,
MaxHeap h=new MaxHeap(); VsJ+-IHm
h.init(data); ~Ni
for(int i=0;i h.remove(); z]r'8Jc
System.arraycopy(h.queue,1,data,0,data.length); v@|<.
} ~h_ _Y>
u.|%@
private static class MaxHeap{ \wD/TLS}
CV\^gTPmx
void init(int[] data){ EYn?YiVFU
this.queue=new int[data.length+1]; nKzm.D gt_
for(int i=0;i queue[++size]=data; %-yzU/`JF
fixUp(size); ; ?f+
} o S=!6h
} pJvPEKN
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private int size=0; Nd]F 33|X
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private int[] queue; t1YB
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public int get() { 5"@>>"3U
return queue[1]; {Y@shf;
} ~9 .=t'
}< H>9iJ:
public void remove() { jQ;/=9
SortUtil.swap(queue,1,size--); -'g>i
fixDown(1); &muBSQ-
} ':fp|m)M
file://fixdown 3nG.ah
private void fixDown(int k) { +Ps.HW#NY
int j; WI4<2u;
while ((j = k << 1) <= size) { g%l ,a3"
if (j < size %26amp;%26amp; queue[j] j++; 'o6}g p)
if (queue[k]>queue[j]) file://不用交换 ",3v%$>
break; I{OizBom
SortUtil.swap(queue,j,k); beBG40
k = j; aaig1#a@1b
} }ofb]_C,
} g}v](Q
private void fixUp(int k) { l<w7 \a6
while (k > 1) { o[cOL^Xd1
int j = k >> 1; La )M
if (queue[j]>queue[k]) KR#,6
break; ":$4/b6
SortUtil.swap(queue,j,k); s-#EV
k = j; q4[8\Ua
} {6H[[7i
} }lIc{R@H
V*b/N
} *sOb I(&
3~T ~Bs
} ekvs3a^
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SortUtil： fr/EkL1Dl
):'wxIVGI
package org.rut.util.algorithm; [(@K;6o
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import org.rut.util.algorithm.support.BubbleSort; 3A!a7]fW
import org.rut.util.algorithm.support.HeapSort; gZ4' w`4r
import org.rut.util.algorithm.support.ImprovedMergeSort; sNDo@u7
import org.rut.util.algorithm.support.ImprovedQuickSort; 5P\>$N1p
import org.rut.util.algorithm.support.InsertSort; w\acgQ^%e
import org.rut.util.algorithm.support.MergeSort; 7.<jdp
import org.rut.util.algorithm.support.QuickSort; a2B71RT~
import org.rut.util.algorithm.support.SelectionSort; 4W"A*A
import org.rut.util.algorithm.support.ShellSort; [*^.$s(
,gVVYH?qR
/** E`oA(x7l
* @author treeroot E xhih^[_
* @since 2006-2-2 MvpJ0Y (
* @version 1.0 RG{T\9]n
*/ 9s^$tgH
public class SortUtil { QMBT8x/+_'
public final static int INSERT = 1; rNq*z,
public final static int BUBBLE = 2; KkZx6A)$u
public final static int SELECTION = 3; M YF ^zheD
public final static int SHELL = 4; `-uE(qp
public final static int QUICK = 5; ^wolY0p
public final static int IMPROVED_QUICK = 6; S/XU4i:aV
public final static int MERGE = 7; aDdGhB
public final static int IMPROVED_MERGE = 8; \Ip)Lm0
public final static int HEAP = 9; ;stuTj@vH
Ab ,^y
public static void sort(int[] data) { nZbI}kcm
sort(data, IMPROVED_QUICK); Y${'
} :EV.nD7
private static String[] name={ $XhMI;h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8X,6U_>#a
}; $(9QnH1KY
[Kwj 7q`
private static Sort[] impl=new Sort[]{ ~o!-[
new InsertSort(), wtek5C^
new BubbleSort(), "tCTkog3]
new SelectionSort(), `MVqd16Y
new ShellSort(), L(TM& ps\-
new QuickSort(), P~trxp=k
new ImprovedQuickSort(), rw'+2\
new MergeSort(), '(5GRI<
new ImprovedMergeSort(), GM6,LzH
new HeapSort() ELCNf
}; 3%+~"4&
"Au4&Fu
public static String toString(int algorithm){ KrpIH6
return name[algorithm-1]; *&I>3;~%^}
} Ljd`)+`D
xG/Q%A
public static void sort(int[] data, int algorithm) { J{ju3jo
impl[algorithm-1].sort(data); 4f\NtQ)
} W'@|ob
w~*@TG
public static interface Sort { H.ZIRt!RB
public void sort(int[] data); ^&?,L@fW
} R])Eg&
AT"gRCU$4
public static void swap(int[] data, int i, int j) { a!$kKOK
int temp = data; >B{NxL3->
data = data[j]; ~*Y#Y{
data[j] = temp; FW|& iS$
} `*8}q!.
} t neTOj