[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; A?$-Uqb"
} LI&E.(:
int i1=l; bsr]Z&9rrk
int i2=mid+1; ;#S]mso1
for(int cur=l;cur<=r;cur++){ e+F$fQt>
if(i1==mid+1) /GM!3%'=
data[cur]=temp[i2++]; r:$*pC&{
else if(i2>r) R4P&r=?
data[cur]=temp[i1++]; |yz o|%]3
else if(temp[i1] data[cur]=temp[i1++]; >d&0a:
else f F)M'C
data[cur]=temp[i2++]; "\T-r2
} (6NDY5h~=n
} fA]sPh4Uag
IR$d?\O3
} x X[WX#'f
TJZ/lJU
改进后的归并排序: zwRF-{s
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package org.rut.util.algorithm.support; _+nk3-yQw
g/ShC8@=u
import org.rut.util.algorithm.SortUtil; *s-s1v
-mGG:#yP
/** " DLIx}
* @author treeroot H&%oHyK
* @since 2006-2-2 54JZOtC3~
* @version 1.0 }9W[7V?
*/ K3`!0(
public class ImprovedMergeSort implements SortUtil.Sort { JZ![:$:
qV idtSb
private static final int THRESHOLD = 10; @ S[As~9X
0^nF: F
/* uDkX{<_Xe
* (non-Javadoc) 4lpcJ+:o
* Lu:*nJ%1[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {r$Ewc$Yb7
*/ QV HI}3~
public void sort(int[] data) { X>Q44FV!
int[] temp=new int[data.length]; LAnC8O
mergeSort(data,temp,0,data.length-1); On~KTt3Mp
} rNo/H<J%+j
>5Lp;
private void mergeSort(int[] data, int[] temp, int l, int r) { ZzTkEz >
int i, j, k; U^ ,!
int mid = (l + r) / 2; 4e.19H9
if (l == r) }F/w34+;
return; I= <eCv
if ((mid - l) >= THRESHOLD) L@=$0p41;
mergeSort(data, temp, l, mid); lF.kAEC
else )*XWe|H_
insertSort(data, l, mid - l + 1); Vp~ cN
if ((r - mid) > THRESHOLD) iu*&Jz)D>
mergeSort(data, temp, mid + 1, r); 0A~UuH0.
else dQ-shfTr]
insertSort(data, mid + 1, r - mid); \,X)!%6kZ
.K(9=yh
for (i = l; i <= mid; i++) { R) dP=W*
temp = data; ~$C<^?"b
} _>;MQ)Km~
for (j = 1; j <= r - mid; j++) { trrK6(p
temp[r - j + 1] = data[j + mid]; 1W\wIj.
} ^0cbN[~/ns
int a = temp[l]; ",vK~m2W_
int b = temp[r]; hgW1g#
for (i = l, j = r, k = l; k <= r; k++) { L[D+=
if (a < b) { uKXD(lzX
data[k] = temp[i++]; ik/ X!YTu*
a = temp; PX/{!_mM
} else { X<Cfy
data[k] = temp[j--]; -ZSN0Xk
b = temp[j]; y9R%%i
} 3Og}_
} ZYY2pY 1
} x*'H@!!G
>K4Nn(~ys
/** d_pIB@J
* @param data [pmIQ228
* @param l 0x5Ax=ut
* @param i !1i-"rR
*/ : -#w
private void insertSort(int[] data, int start, int len) { l-v m`-_#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uI?Z_
} ilJ`_QN
} <dD!_S6@,
} >2pxl(i
} =j- ,yxBvJ
;UpJ_y)n8\
堆排序： wf]?:'}
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package org.rut.util.algorithm.support; hI*v)c
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import org.rut.util.algorithm.SortUtil; E' `;
fi*b]a\'
/** xl,% Z~[
* @author treeroot ,'`yh|}G\
* @since 2006-2-2 R59iuHQ[
* @version 1.0 SZ[?2z
*/ a$Ud"
public class HeapSort implements SortUtil.Sort{ yc3/5]E&
l P=I0A-
/* (non-Javadoc) p~8O6h@J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^Ld5<
*/ x X3I`
public void sort(int[] data) { X,3\c:
MaxHeap h=new MaxHeap(); bK0(c1*a[e
h.init(data); [[<TW}
for(int i=0;i h.remove(); SZrc-f_
System.arraycopy(h.queue,1,data,0,data.length); j;y(to-e>D
} TS+jDs
pA_u;*
private static class MaxHeap{ Yu)GV7\2
M_%KhK
void init(int[] data){ }`QZV_
this.queue=new int[data.length+1]; XtZd% #2},
for(int i=0;i queue[++size]=data; -o"b$[sf=Z
fixUp(size); zo"L9&Hzo
} aBaiXv/*
} ;-py h(
%au>D
private int size=0; xsRkO9x
>Q@y8*E\F
private int[] queue; U@yhFj_y
Et}%)M
public int get() { Ieq_XF]U
return queue[1]; ]WYub1
} aLm~.@Q
52o^]
public void remove() { T>(X`(
SortUtil.swap(queue,1,size--); oVHe<zE.
fixDown(1); Y0lLO0'
} M"s:*c_6
file://fixdown C&qo$C
private void fixDown(int k) { \Q}Y"oq
int j; "DvZCf[}
while ((j = k << 1) <= size) { s=jH1^
if (j < size %26amp;%26amp; queue[j] j++; P~!,"rY
if (queue[k]>queue[j]) file://不用交换 o@360#njF
break; ;g#nGs>
SortUtil.swap(queue,j,k); )_j(NX-C:
k = j; x5PM]~"p
} =d"5kDK-m
} "pK<d~Wu
private void fixUp(int k) { jf;n*
while (k > 1) { @,,G]4zZ!
int j = k >> 1; [6g$;SicT
if (queue[j]>queue[k]) 1CZO+MB&"$
break; Z~94<*LEp
SortUtil.swap(queue,j,k); DS%]7,g]
k = j; ]CcRI|g}
} M'R ] ''
} 85dC6wI4K
*mj=kJ7(
} X)RgXl{
#=)>,6Zw
} 5$:9nPAH
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SortUtil： g.62XZF@
t%^&b'/Z
package org.rut.util.algorithm; ~};q/-[r
kFkI[WKyZ
import org.rut.util.algorithm.support.BubbleSort; uUq= L
import org.rut.util.algorithm.support.HeapSort; <"p-0=IgJ
import org.rut.util.algorithm.support.ImprovedMergeSort; U&*%KPy`
import org.rut.util.algorithm.support.ImprovedQuickSort; 2x|FVp
import org.rut.util.algorithm.support.InsertSort; 5Zhl@v,L%
import org.rut.util.algorithm.support.MergeSort; 0'A"]6
import org.rut.util.algorithm.support.QuickSort; jbZTlG
import org.rut.util.algorithm.support.SelectionSort; ~-H3]
import org.rut.util.algorithm.support.ShellSort; Qp:m=f6@
r~QE}00@^
/** ps`j>vX*
* @author treeroot hop| xtai;
* @since 2006-2-2 Au)~"N~p?
* @version 1.0 c]U+6JH
*/ 6Xo"?f
public class SortUtil { PvW4%A@0
public final static int INSERT = 1; Bnwq!i!M
public final static int BUBBLE = 2; wmR~e
public final static int SELECTION = 3; )@Y< <9'2
public final static int SHELL = 4; /|&4&$
public final static int QUICK = 5; bxO/FrwTj{
public final static int IMPROVED_QUICK = 6; BL>~~
public final static int MERGE = 7; W79.Nj2`
public final static int IMPROVED_MERGE = 8; `h:!^"G
public final static int HEAP = 9; qW4\t
Qqj9o2
public static void sort(int[] data) { :,$"Gk
sort(data, IMPROVED_QUICK); %}~(%@qB>+
} T?Z&\g0yp
private static String[] name={ {=&({ cS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eYkg4O'
}; I!kR:Z
@\oZ2sB
private static Sort[] impl=new Sort[]{ <0~1
new InsertSort(), [%6)
new BubbleSort(), 6,~1^g*
new SelectionSort(), aEa+?6;D
new ShellSort(), !vK0|eV3
new QuickSort(), ?D9iCP~~
new ImprovedQuickSort(), /ET+`=n
new MergeSort(), CsT&}-C
new ImprovedMergeSort(), %8Y+Df;ax
new HeapSort() ~@@$-,}X
}; *""W`x
<|G!Qn?2-
public static String toString(int algorithm){ 5efN5Kt
return name[algorithm-1]; ;iJxJX\+
} a ^juZ
# &5.
public static void sort(int[] data, int algorithm) { -h ^MX
impl[algorithm-1].sort(data); qq[Dr|%7
} Sj/v:
&AeNrtGu
public static interface Sort { ;0?OBUDO
public void sort(int[] data); R/E6n &R
} '?_~{\9<
}[@Q**j(
public static void swap(int[] data, int i, int j) { $II~tO
int temp = data; )xz_}6b]
data = data[j]; ~h=iZ/g_^_
data[j] = temp; .EjR<UU
} @;hdZLG]`&
} \K%M.>]vq