[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; Y_,Tm
} d]+2rt}]hL
int i1=l; ]:}x 4O#
int i2=mid+1; 6oy[0hj
for(int cur=l;cur<=r;cur++){ /0(c-Dv
if(i1==mid+1) Wo7`gf_(
data[cur]=temp[i2++]; 5Mz6/&`
else if(i2>r) ZYs?65.
data[cur]=temp[i1++]; <8YIQA
else if(temp[i1] data[cur]=temp[i1++]; !P@4dG
else [Y-3C47
data[cur]=temp[i2++]; Z}yd`7
} St;@ZV
} SdNxSD$Q
=i:,")W7=
} gVI T6"/
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改进后的归并排序: X]c>clk,
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package org.rut.util.algorithm.support; ;YYnIb(
sfzDE&>'
import org.rut.util.algorithm.SortUtil; 0`$fs.4c
EnP>
/** q]#j,}cN9
* @author treeroot LX{mr{
* @since 2006-2-2 BDT"wy8
* @version 1.0 lQ!(lPh
*/ ~ugH2jiB
public class ImprovedMergeSort implements SortUtil.Sort { Y lhKP;
bA\(oD+:
private static final int THRESHOLD = 10; xwa@h}\#
W<T Ui51Y
/* (kL(:P/
* (non-Javadoc) z C7b
* vf?Xt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &?Z<"+B8S
*/ P1dFoQz
public void sort(int[] data) { 4P}d/w?'KL
int[] temp=new int[data.length]; y/;DA=
mergeSort(data,temp,0,data.length-1); dZuPR
} Mw|lEctN0
6 jU?~
private void mergeSort(int[] data, int[] temp, int l, int r) { 8f>v[SQ"
int i, j, k; 'RZ0,SK'
int mid = (l + r) / 2; cS(=wC
if (l == r) ?D['>Rzu
return; _V(FHjY
if ((mid - l) >= THRESHOLD) o]@'R<F(u
mergeSort(data, temp, l, mid); =}'7}0M_=
else 2?kVbF
insertSort(data, l, mid - l + 1); D*t[5,~j
if ((r - mid) > THRESHOLD) 58t~? 2E
mergeSort(data, temp, mid + 1, r); h(p cGE
else O:Wd ,3_
insertSort(data, mid + 1, r - mid); p<c1$O*
&"d :+!4h
for (i = l; i <= mid; i++) { vDCbD#.6
temp = data; JfRqOEP4Y
} uoTc c|Kc
for (j = 1; j <= r - mid; j++) { A9y@v{txN
temp[r - j + 1] = data[j + mid]; ]sJjV A
} Uj^Y\w-@Z
int a = temp[l]; j+[oZfH
int b = temp[r]; 5h6-aQU[
for (i = l, j = r, k = l; k <= r; k++) { T[kS;-x
if (a < b) { &"DD&87N%
data[k] = temp[i++]; {Zo*FZcaX
a = temp; B/dJj#
} else { '#lc?Y(pJ2
data[k] = temp[j--]; pER[^LH_)
b = temp[j]; MUUhg
} ?N]G;%3/
} W/.Wp|C}K3
} =yZ6$ hK
C:z7R" yj
/** IwR=@Ne8
* @param data B$MHn?
* @param l UaBNoD
* @param i I].ddR%
*/ BO0Y#fs
private void insertSort(int[] data, int start, int len) { ~^>g<YR[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (dP9`Na]
} 2XyC;RWJ%
} #>2cfZ`6'J
} JPpNCC.b
} \`W8#fob
j43i:c;F
堆排序： rh T!8dTk
74a k|(!
package org.rut.util.algorithm.support; M$e$%kPShE
#M<u^$Jz
import org.rut.util.algorithm.SortUtil; !}q@O-}j
AmK g;9LS
/** k#G+<7c<
* @author treeroot uTrQ<|}#
* @since 2006-2-2 H[N~)3x
* @version 1.0 cFHSMRB|P
*/ vj"['6Xa
public class HeapSort implements SortUtil.Sort{ KN~Repcz@
6C!TXV'
/* (non-Javadoc) U["IXR#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P_(<?0l
*/ {6iHUK
public void sort(int[] data) { n1)].`
MaxHeap h=new MaxHeap(); JqtOoR
h.init(data); G$s=P
for(int i=0;i h.remove(); =Ds&ArG
System.arraycopy(h.queue,1,data,0,data.length); ~zDFL15w
} JC9OL.Ob
`[~LMV&2U
private static class MaxHeap{ SDO~g~NTp
+'aG{/J
void init(int[] data){ mV}eMw
this.queue=new int[data.length+1]; t![972.&
for(int i=0;i queue[++size]=data; 1pT/`x
fixUp(size); 5;A=8bryU
} ;0}C2Cz'
} vqo ~?9z[e
:-~x~ah-
private int size=0; KJ_L>$ ]*
9g7Ok9dF
private int[] queue; A/.z. K
>Sm#-4B-
public int get() { Ca0t}`<S
return queue[1]; i8.OM*[f
} RY*yj&?w[
x5,|kJ9S
public void remove() { cBU@853
SortUtil.swap(queue,1,size--); d4o_/[
fixDown(1); L>!MEMqm
} 1wW4bg 5
file://fixdown c}w[T
private void fixDown(int k) { [yVcH3GcjI
int j; <n0j'P>1
while ((j = k << 1) <= size) { :KsBJ>2ck
if (j < size %26amp;%26amp; queue[j] j++; 4}Hf"L[ l
if (queue[k]>queue[j]) file://不用交换 Co`:D
break; ]CgZt'h{
SortUtil.swap(queue,j,k); :U-yO 9!j
k = j; uN6xOq/
} |2&|#K4k^
} BA_l*h%=Cc
private void fixUp(int k) { }tedh
while (k > 1) { 7G_OFD
int j = k >> 1; 8TO5j
if (queue[j]>queue[k]) 3,Bm"'b6
break; b2YOnV
SortUtil.swap(queue,j,k); P> ~Lx
k = j; MsA)Y
} cX5tx]
} E /V`NqC
#uuNH(
} 7/BA!V(na
DIh[%
} -3C$br
F-Ywl)
SortUtil： ~PCS_
T7Yg^ -"
package org.rut.util.algorithm; E5$uvxCI
;MjOs&1f0K
import org.rut.util.algorithm.support.BubbleSort; <@=w4\5j9
import org.rut.util.algorithm.support.HeapSort; x2+M0 }g
import org.rut.util.algorithm.support.ImprovedMergeSort; -ha[xM05
import org.rut.util.algorithm.support.ImprovedQuickSort; ;^P0+d^5C
import org.rut.util.algorithm.support.InsertSort; ~T&X#i
import org.rut.util.algorithm.support.MergeSort; dZ\T@9+j+
import org.rut.util.algorithm.support.QuickSort; LY!.u?D`P
import org.rut.util.algorithm.support.SelectionSort; zxvowM
import org.rut.util.algorithm.support.ShellSort; ;\t(c
ni3A+Y0
/** =Lr# *ep[
* @author treeroot >{juw&Uu
* @since 2006-2-2 r'u[>uY
* @version 1.0 8C2!Wwz`J8
*/ VB{G%!}
public class SortUtil { 5va ;Ol4
public final static int INSERT = 1; =eG:Scoug?
public final static int BUBBLE = 2; el,n5OZ7
public final static int SELECTION = 3; 6}PoBhgSg-
public final static int SHELL = 4; U&y?3
public final static int QUICK = 5; 8wA'a'V.
public final static int IMPROVED_QUICK = 6; sg,9{R ^
public final static int MERGE = 7; 3<HPZWc
public final static int IMPROVED_MERGE = 8; r;8$ 7C.
public final static int HEAP = 9; P87qUC
|C;*GeyS;J
public static void sort(int[] data) { V$ac}A,!
sort(data, IMPROVED_QUICK); ~kPZh1n`
} U`ELd:
private static String[] name={ _xU2C<)1&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" WG3 .qLH%
}; g [+_T{
xr-v"-
private static Sort[] impl=new Sort[]{ j es[a
new InsertSort(), cGe-|>:
new BubbleSort(), JU0|pstf
new SelectionSort(), ^ZO3:"t!w
new ShellSort(), `Yc>I!iN
new QuickSort(), X !l#1
new ImprovedQuickSort(), 4gK_'b6"
new MergeSort(), 5}2XnM2
new ImprovedMergeSort(), aD8r:S\
new HeapSort() x)o`w"]al
}; =%oKYQ
j0[9Cj^%c
public static String toString(int algorithm){ KR/SMwy
return name[algorithm-1]; *7 >K"j
} -AU!c^-o
n7K\\|X
public static void sort(int[] data, int algorithm) { +W9#^
impl[algorithm-1].sort(data); L\X2Olfz1
} 8p~G)J3U
D[}qhDlX
public static interface Sort { VcR(9~
public void sort(int[] data); kc70HrG
} 4f> s2I&pQ
%q 7gl;'
public static void swap(int[] data, int i, int j) { n+uDg
int temp = data; h^"OC$
data = data[j]; I%31MU9
data[j] = temp; pwO U6A!
} j#E&u*IR
} |\ 4cQ