[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; =,i?8Fuz
} Qy=tkCN
int i1=l; fIatp
int i2=mid+1; :B|rs&
for(int cur=l;cur<=r;cur++){ Wf%)::G*uR
if(i1==mid+1) (Ia:>ocE0
data[cur]=temp[i2++]; HM"(cB(n`
else if(i2>r) RU=g|TL
data[cur]=temp[i1++]; ^YfAsBs&
else if(temp[i1] data[cur]=temp[i1++]; 3/& |Z<f
else Z/v )^VR
data[cur]=temp[i2++]; B>z^W+Unyn
} C:bA:O
} <S;YNHLC
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} m9jjKu]|
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改进后的归并排序: `Pwf?_2n-
2)n%rvCQ
package org.rut.util.algorithm.support; Gz8JOl
>s,*=a
import org.rut.util.algorithm.SortUtil; Pl#u,Y
L=s8em]7l
/** Bxj4rC[
* @author treeroot ?V_v=X%w
* @since 2006-2-2 F^TOLwix
* @version 1.0 G4#Yz6O
*/ -~lrv#5Q
public class ImprovedMergeSort implements SortUtil.Sort { !VrBoU4<d
!}1l8Y
private static final int THRESHOLD = 10; y] Cx[
]#q$i[Y
/* Aqg$q* Y
* (non-Javadoc) ?9 `T_,
* a<+Rw{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,p\*cHB9
*/ ,pkzNe`F
public void sort(int[] data) { cmaha%3d
int[] temp=new int[data.length]; qPhVc9D#
mergeSort(data,temp,0,data.length-1); AO5a
} HJ!)&xT
X\<a|/{V A
private void mergeSort(int[] data, int[] temp, int l, int r) { Y!|};
int i, j, k; (.{."
int mid = (l + r) / 2; m5KLi &R
if (l == r) QEx&AT
return; 0{?%"t\/f
if ((mid - l) >= THRESHOLD) i@<w"yNd_
mergeSort(data, temp, l, mid); (m.jC}J
else y%YP
insertSort(data, l, mid - l + 1); DAEWa Kui
if ((r - mid) > THRESHOLD) e+@.n
mergeSort(data, temp, mid + 1, r); WCp[6g&%O
else PM {L}tEQ
insertSort(data, mid + 1, r - mid); *y>|
F{}:e QD
for (i = l; i <= mid; i++) { bs?4|#[K
temp = data; *S Z]xrs
} C{ Z*5)
for (j = 1; j <= r - mid; j++) { (hv}K*c{
temp[r - j + 1] = data[j + mid]; R/^;,.
} o9v9 bL+X
int a = temp[l]; ~i}/
int b = temp[r]; I&x69
for (i = l, j = r, k = l; k <= r; k++) { Ww{-(Ktx
if (a < b) { -r0oO~KT
data[k] = temp[i++]; 1;>RK
a = temp; xlW>3'uHfa
} else { Me;Nn$'%
data[k] = temp[j--]; |txzIc.#
b = temp[j]; '_g*I
} Yt4v}{+
} )IE)a[wo
} *I9G"R8
i\MW'b
/** m :]F&s
* @param data QkO4Td<
* @param l #P1;*m
* @param i YeF'r.Y
*/ .+^o{b
private void insertSort(int[] data, int start, int len) { ]d&;QZ#w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3v<9 Z9O
} rO1.8KKJ
} N=:xyv
} u)ZZ/|
} <5sfII
} x'o`GuUf
堆排序： +!wkTrV
uQW d1>
package org.rut.util.algorithm.support; `"bp-/
[{_K[5i
import org.rut.util.algorithm.SortUtil; .:, 9Tf
I]ol[ X0S
/** ;Y(~'KF
* @author treeroot ]6HnK%
* @since 2006-2-2 Q $>SYvW
* @version 1.0 ,k/<Nv;
*/ K%vGfQ8Er-
public class HeapSort implements SortUtil.Sort{ UAdj[m61
@{8805Dp
/* (non-Javadoc) sM%.=~AN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cACnBgLl
*/ OL#RkD
public void sort(int[] data) { [dXRord
MaxHeap h=new MaxHeap(); ]}AyDy6C
h.init(data); v8A{q
for(int i=0;i h.remove(); QOF'SEq"k
System.arraycopy(h.queue,1,data,0,data.length); :#W>lq@H
} w;^7FuBaC
0'*'%Iga
private static class MaxHeap{ Cd7d-'EQn
C6b(\#g(
void init(int[] data){ XecU&
this.queue=new int[data.length+1]; _Hq)mF
for(int i=0;i queue[++size]=data; gr$H?|n l
fixUp(size); )i>T\B
} DZ|/#- k
} 3bB%@^<
gH/k}M7tA#
private int size=0; )$I"LyK)
(%;D& ~%o
private int[] queue; ]5J*UZ}
R )e^H
public int get() { cK+)MFOu+
return queue[1]; CB?H`R pC.
} (fWQ?6[
y]f| U-f:~
public void remove() { px_%5^zRQ
SortUtil.swap(queue,1,size--); BRMR> ~k(
fixDown(1); C/pu]%n@4
} ^kpu9H
file://fixdown &]/.=J
private void fixDown(int k) { 4'# _b
int j; OKzk\F6
while ((j = k << 1) <= size) { =t-503e.J
if (j < size %26amp;%26amp; queue[j] j++; ::kpAE]
if (queue[k]>queue[j]) file://不用交换 JTB5#S4W
break; }L*cP;m#
SortUtil.swap(queue,j,k); KHXnB
k = j; pG:)u cj
} K3t^y`z
} r7p>`>_Q\
private void fixUp(int k) { gG=E2+=uy
while (k > 1) { _26F[R1><~
int j = k >> 1; 6e;.}i
if (queue[j]>queue[k]) *,DBRJ_*7
break; lL:J:
SortUtil.swap(queue,j,k); V]9?9-r
k = j; v<Ux+-
} KcjP39@I
} 3^zOG2
`_v|O{DC{
} BK]q^.7+:
mWM!6"
} xTL"%'|
z<mU$<
SortUtil： AHR[i%3W
#yVY!+A
package org.rut.util.algorithm; 1jozM"H7Q
qcfLA~y
import org.rut.util.algorithm.support.BubbleSort; vQ}llA h
import org.rut.util.algorithm.support.HeapSort; jM3{A;U2
import org.rut.util.algorithm.support.ImprovedMergeSort; b fsTeW+
import org.rut.util.algorithm.support.ImprovedQuickSort; fm\IQqIK%
import org.rut.util.algorithm.support.InsertSort; pJ5Sxgv{;
import org.rut.util.algorithm.support.MergeSort; DFt1{qS8@u
import org.rut.util.algorithm.support.QuickSort; K(HP PM\
import org.rut.util.algorithm.support.SelectionSort; ,tL<?6_
import org.rut.util.algorithm.support.ShellSort; L[*Xrp;/&
I.\fhNxHY
/** y85/qg)H^
* @author treeroot #SRGVa`x
* @since 2006-2-2 ZOG6
* @version 1.0 ]f q.r
*/ x*[\$E`v
public class SortUtil { /wL}+
public final static int INSERT = 1; \6xVIQ& 0
public final static int BUBBLE = 2; v7/qJ9l
public final static int SELECTION = 3; e? fFh,a
public final static int SHELL = 4; }ya9 +?I
public final static int QUICK = 5; pRj1b^F5y
public final static int IMPROVED_QUICK = 6; D[)g-_3f6<
public final static int MERGE = 7; Dw^d!%Ala
public final static int IMPROVED_MERGE = 8; ]|[oL6"
public final static int HEAP = 9; ;Z"6ve4
;p#)z/zZ
public static void sort(int[] data) { MI@id
sort(data, IMPROVED_QUICK); ?j8F5(HF?
} B@l/'$G
private static String[] name={ ;%AK< RT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xS`>[8?3<T
}; g Xvuv^
kfBVF%90
private static Sort[] impl=new Sort[]{ VZ;ASA?;
new InsertSort(), -[4Xg!apO
new BubbleSort(), R1FBH:Iu
new SelectionSort(), (&FSoe/!['
new ShellSort(), Cv|ya$}a
new QuickSort(), r"a0!]n
new ImprovedQuickSort(), gYx|Na,+
new MergeSort(), YzSUJ=0/
new ImprovedMergeSort(), ".eD&oX{
new HeapSort() Z*QsDS
}; nJ4i[j8
Qsc%qt-l
public static String toString(int algorithm){ /4]M*ls
return name[algorithm-1]; QOkPliX
} l=ZhHON
Dm[4`p@IY\
public static void sort(int[] data, int algorithm) { c?CjJ}-7
impl[algorithm-1].sort(data); 9Ay*'
} _rK}~y=0
b&Qj`j4]ZM
public static interface Sort { jnX9] PkJ
public void sort(int[] data); )G0a72
} XFPWW,
DGTSk9iK(
public static void swap(int[] data, int i, int j) { 1_!*R]aq
int temp = data; :~pPB#)nk
data = data[j]; m0W5Ogk
data[j] = temp; z)r)w?A
} bH&Cbme90-
} auqM>yx