[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; SH*C"
} ?9l [y
int i1=l; NCxqh<
int i2=mid+1; ?$f)&O
for(int cur=l;cur<=r;cur++){ )jq?lw'&
if(i1==mid+1) 91Uj}n%
data[cur]=temp[i2++]; >zDF2Y[
else if(i2>r) O+%WR
data[cur]=temp[i1++]; (`SRJ$~f
else if(temp[i1] data[cur]=temp[i1++]; 66^ycZCH
else _f/6bpv
data[cur]=temp[i2++]; `On%1%k8
} C&\#{m_1B
} z&w@67 >j
ikUG`F%W
} V V<Zl
PAJt M
改进后的归并排序: XLB7 E
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package org.rut.util.algorithm.support; Z<`QDBN"4
opd^|xx0
import org.rut.util.algorithm.SortUtil; yN9/'c~
q.*k J/L
/** t\ ym4`"
* @author treeroot -GH>12YP
* @since 2006-2-2 (m13 ong
* @version 1.0 04o(05K
*/ dj 4:r!5_
public class ImprovedMergeSort implements SortUtil.Sort { umI@ej+D
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private static final int THRESHOLD = 10; Lc=t,=OhGe
6YNd;,it>p
/* c1Skt
* (non-Javadoc) `@RTfBBg
* H>X:#xOA_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iU+O(vi
*/ )1N~-VuT
public void sort(int[] data) { 0l;TZf=H
int[] temp=new int[data.length]; <v%Q|r
mergeSort(data,temp,0,data.length-1); ]V^ >aUlj
} 6o6I]QL
~7ZWtg;B
private void mergeSort(int[] data, int[] temp, int l, int r) { 508v:?^'
int i, j, k; DZ"'GQSg
int mid = (l + r) / 2; shKTj5s?
if (l == r) {OIB/
return; Zjd9@
if ((mid - l) >= THRESHOLD) W[/Txc0$
mergeSort(data, temp, l, mid); F$M^}vsjGx
else Kl_(4kQE_
insertSort(data, l, mid - l + 1); IK1'" S|
if ((r - mid) > THRESHOLD) Ym%XCl
mergeSort(data, temp, mid + 1, r); VkFMr8@|
else {^8?fJ/L
insertSort(data, mid + 1, r - mid); /*P) C'_M
2)hfYLi
for (i = l; i <= mid; i++) { ,Wv+Ek
temp = data; z;DNl#|!L
} GHY+q{'#V_
for (j = 1; j <= r - mid; j++) { jIEntk
temp[r - j + 1] = data[j + mid]; 0nbY~j$A=
} qA0PGo
int a = temp[l]; w p\-LO~
int b = temp[r]; ml@;ngmp.
for (i = l, j = r, k = l; k <= r; k++) { -U*J5Q
if (a < b) { _iu~vU)r
data[k] = temp[i++]; P?p]sLrP
a = temp; +-C.E
} else { /%g+|C
data[k] = temp[j--]; IdqCk0lVD
b = temp[j]; pT{is.RM
} }{y)a<`
} "}MP{/
} Qk? WX (`B
1w~PHH`~
/** 9U8x&Z]P
* @param data 3\2%i6W6
* @param l @R%*;)*F
* @param i ,OWk[0/
*/ f0vO(@I
private void insertSort(int[] data, int start, int len) { R2v9gz;W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hr;^.a^
} @Ddz|4vEi
} Mgr?D
} }f;WYz5
} GF6o
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堆排序： Da615d
%cLS*=MO
package org.rut.util.algorithm.support; f";pfu_FZ
Tf~eH!~0
import org.rut.util.algorithm.SortUtil; |Fe[RGi+8
bn)1G$0|
/** :h5G|^
* @author treeroot +N=HI1^54R
* @since 2006-2-2 mFg$;F
* @version 1.0 -=nk,cYn
*/ Mh*r)B~%[
public class HeapSort implements SortUtil.Sort{ ;Ax-f04gG
q[_qZ
/* (non-Javadoc) )w0x{_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XjF@kQeM=
*/ GA[Ebzi
public void sort(int[] data) { '{cSWa| #
MaxHeap h=new MaxHeap(); N]w_9p~=1
h.init(data); :~ pGHl
for(int i=0;i h.remove(); &EqLF
System.arraycopy(h.queue,1,data,0,data.length); Vf;&z$D{r
} [a04( 2g
N2O *g`YC
private static class MaxHeap{ <Cv(@A->
l3sF/zkH
void init(int[] data){ \rFS^#
this.queue=new int[data.length+1]; :ZM9lBYh
for(int i=0;i queue[++size]=data; uR ?W|a
fixUp(size); (iX8YP$%
} :D*U4< /u
} IplOXD
B:Ts_9*
private int size=0; M@R"-$Z
+b(};(wL
private int[] queue; -NXxxK
N[po)}hp
public int get() { G IN|cv=
return queue[1]; rW)h?, b
} h+}BtKA
7q+D}+ Xf
public void remove() { 6;Z-Y>\c
SortUtil.swap(queue,1,size--); )O]6dd
fixDown(1); SXk.7bMV6
} #RBrii-,
file://fixdown cD0rU8x
private void fixDown(int k) { I/`"lAFe
int j; M76p=*
while ((j = k << 1) <= size) { R9U{r.AA
if (j < size %26amp;%26amp; queue[j] j++; a_RY Yj
if (queue[k]>queue[j]) file://不用交换 ?H=q!i
break; ^.6[vmmq
SortUtil.swap(queue,j,k); Co1d44Q
k = j; sp,-JZD
} Y;/@[AwF
} PMfW;%I.
private void fixUp(int k) { Cz0FA]-g
while (k > 1) { ?{ N,&d
int j = k >> 1; ye(b 7CX
if (queue[j]>queue[k]) pey=zR!
break; aKDY_D
SortUtil.swap(queue,j,k); iFd !ED
k = j; 50cVS)hG6d
} PVIOe}N
} Fi/iA%,
wZ(1\ M(
} EhxpMTS
"`>6M&`U
} o{PG& }K
~CNB3r5R
SortUtil： cnu&!>8V
kelBqJ-,p
package org.rut.util.algorithm; |0n )U(
fx;rMGa
import org.rut.util.algorithm.support.BubbleSort; ^Hx}.?1
import org.rut.util.algorithm.support.HeapSort; > Vm}u`x
import org.rut.util.algorithm.support.ImprovedMergeSort; NM{)liP ;8
import org.rut.util.algorithm.support.ImprovedQuickSort; EtcT:k?y
import org.rut.util.algorithm.support.InsertSort; cYA:k
import org.rut.util.algorithm.support.MergeSort; y\T$) XGV
import org.rut.util.algorithm.support.QuickSort; ,Kv6!ib6Q
import org.rut.util.algorithm.support.SelectionSort; jZA1fV
import org.rut.util.algorithm.support.ShellSort; \D@j`o
Rw?w7?I
/** GHsDZ(d3.
* @author treeroot NNt n
* @since 2006-2-2 WZ'<iI
* @version 1.0 T8S&9BM7
*/ bBi>BP=
public class SortUtil { |/Vq{gxp+
public final static int INSERT = 1; k=s^-Eiu
public final static int BUBBLE = 2; *j3U+HV
public final static int SELECTION = 3; k-~}KlP
public final static int SHELL = 4; nt2b}u>*
public final static int QUICK = 5; SoziFI
public final static int IMPROVED_QUICK = 6; HxO+JI`'3
public final static int MERGE = 7; BZ?w}%-MO
public final static int IMPROVED_MERGE = 8; [j6]!p]S$
public final static int HEAP = 9; c}@E@Y`@w
^(q .f=I!a
public static void sort(int[] data) { N3u06
sort(data, IMPROVED_QUICK); v?He]e'
} JG;}UuHYM
private static String[] name={ (dg,w*t'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2hHRitt36
}; !KI^Z1dP(
3eUi9_s+
private static Sort[] impl=new Sort[]{ /we]i1-9
new InsertSort(), &b (*
new BubbleSort(), 2bCfY\k
new SelectionSort(), q7CLxv &QG
new ShellSort(), 3HyOQD"{
new QuickSort(), #x.v)S
new ImprovedQuickSort(), g[~{iu_$d
new MergeSort(), ndFVP;q
new ImprovedMergeSort(), G&h@
new HeapSort() N8nt2r<h
}; ;L$-_Z
kI"9T`owR
public static String toString(int algorithm){ |M?s[}ll
return name[algorithm-1]; MsIR~
} ;gL{*gR]S
huZ5?'/Fg
public static void sort(int[] data, int algorithm) { }k.yLcXM
impl[algorithm-1].sort(data); `\@n&y[`7
} ,hf W2}
#e.x]v:
public static interface Sort { 1V]ws}XW
public void sort(int[] data); @:im/SE
} fln[Q2zl
%<^^ Mw
public static void swap(int[] data, int i, int j) { B9,39rG/7+
int temp = data; zHKP$k8
data = data[j]; "$N$:B@U
data[j] = temp; COsy.$|4
} dA~_[x:Z
} 8AW}7.<5