[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; l*.u rG
} s(T0lul
int i1=l; !,|-{":
int i2=mid+1; eo*l^7
for(int cur=l;cur<=r;cur++){ l6*MiX]q
if(i1==mid+1) ]ZnASlc)
data[cur]=temp[i2++]; P$x9Z3d_
else if(i2>r) e9RH[:
data[cur]=temp[i1++]; 'NMO>[.
else if(temp[i1] data[cur]=temp[i1++]; O9P+S|hcY
else {'p < o$(S
data[cur]=temp[i2++]; KKq%'y)u^
} *Z$W"JP
} yJ/YK
|}?H$d
} !bCSt?}@u
j{j5TvsrY
改进后的归并排序: G?v!Uv8O
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package org.rut.util.algorithm.support; k Nvb>v
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import org.rut.util.algorithm.SortUtil; D;&\)
G^sx/H76J
/** dS8ydG2
* @author treeroot g< xE}[gF
* @since 2006-2-2 BRy3D\}
* @version 1.0 k;B[wEW@
*/ ]$uC~b
public class ImprovedMergeSort implements SortUtil.Sort { + ZKU2N*
+T&YYO8>5
private static final int THRESHOLD = 10; Pr:\zI
7},oY""8
/* i)$P1h
* (non-Javadoc) jGi{:}`lB
* 0l3[?YtXc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K {kd:pr
*/ $q*a}d[Q
public void sort(int[] data) { 80=LT-%#
int[] temp=new int[data.length]; NLra"Z
mergeSort(data,temp,0,data.length-1); ^Ze(WE)
} #mU<]O
;mYZ@g%e
private void mergeSort(int[] data, int[] temp, int l, int r) { cQ]c!G|a4
int i, j, k; h% KEg667
int mid = (l + r) / 2; aAbA)'G
if (l == r) ,]@K,|pC)
return; ;Xf1BG r
if ((mid - l) >= THRESHOLD) c`/VYgcTqB
mergeSort(data, temp, l, mid); soLW'8
else 9%Tqk"x?
insertSort(data, l, mid - l + 1); Zs]n0iwM'@
if ((r - mid) > THRESHOLD) {sf ,(.W
mergeSort(data, temp, mid + 1, r); gxhdxSm=2
else -uxU[E
insertSort(data, mid + 1, r - mid); u]Q}jqiq"
+;\w'dBi,
for (i = l; i <= mid; i++) { }K={HW1>
temp = data; 'pT13RFD
} b*(K;`9)B
for (j = 1; j <= r - mid; j++) { 8Ji`wnkXe
temp[r - j + 1] = data[j + mid]; j^5YFUwsQg
} QJj='+R>
int a = temp[l]; v)T# iw[
int b = temp[r]; B~E">}=!
for (i = l, j = r, k = l; k <= r; k++) { @dk-+YxG
if (a < b) { B$6KI
data[k] = temp[i++]; 7~FHn'xt
a = temp; 8R%<~fq r
} else { SswcO9JCX3
data[k] = temp[j--]; <5D4h!
b = temp[j]; Xy%||\P{)
} {Ef.wlZ
} <{k`K[)
} ZG0^O"B0
5+11J[~{
/** Lu{/"&)
* @param data G^tazAEfo
* @param l ?_FL 'G
* @param i V'e%%&g~N
*/ g5y`XFY
private void insertSort(int[] data, int start, int len) { q01 L{~>bz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;py9,Wno
} 5q*s_acQ
} Ea&NJ]& g
} Yb^e7Eug
} `kuu}YUi
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堆排序： Ovc9x\N
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package org.rut.util.algorithm.support; pHoHngyi&
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import org.rut.util.algorithm.SortUtil; xhbN=L
y%ij)vQY
/** jhf# gdz%
* @author treeroot L /:^;j`c
* @since 2006-2-2 \#(1IC`as
* @version 1.0 SGSyO0O
*/ YTFU#F
public class HeapSort implements SortUtil.Sort{ 26g]_Igq
(_|*&au J
/* (non-Javadoc) h$kz3r;b,"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r&m49N,d
*/ o S=!6h
public void sort(int[] data) { pJvPEKN
MaxHeap h=new MaxHeap(); ,+ G
h.init(data); Nd]F 33|X
for(int i=0;i h.remove(); CDM6o!ur3
System.arraycopy(h.queue,1,data,0,data.length); _\KFMe=PV
} Dc@O Mr
COsmVQ.
private static class MaxHeap{ d_d&su E
gkO^J{_@q
void init(int[] data){ ~1D^C |%
this.queue=new int[data.length+1]; 9c[X[Qc
for(int i=0;i queue[++size]=data; W,NqevXo:
fixUp(size); EP#2it]0]
} [:{ FR2*x
} 8 7(t<3V&
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private int size=0; U!o7Nw@z
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private int[] queue; &RYdSXM
aaig1#a@1b
public int get() { tO{{ci$-T
return queue[1]; I4G0!"T+
} ?VNtT/
&'$Bk5D@G
public void remove() { z )'9[t
SortUtil.swap(queue,1,size--); R|8vdZ%@
fixDown(1); 0WC\uxT7
} O3@DU#N&s
file://fixdown #zTy7ZS,0
private void fixDown(int k) { w2.] 3QAZ
int j; >t3_]n1e
while ((j = k << 1) <= size) { u:f ]|Q
if (j < size %26amp;%26amp; queue[j] j++; ).;{'8Q
if (queue[k]>queue[j]) file://不用交换 x|a&wC2,{
break; OW@%H;b
SortUtil.swap(queue,j,k); [*^.$s(
k = j; aO(PVS|P
} ~D9Cu>d9
} &^"Ru?MK
private void fixUp(int k) { @v%Kwe1Q
while (k > 1) { `f;w
int j = k >> 1; $_"u2"p
if (queue[j]>queue[k]) t`z"=S
break; j**[[
SortUtil.swap(queue,j,k); vHf)gi}O|
k = j; =$J(]KPv!?
} 4CF;>b f~
} Ncz4LKzt
#@B"E2F
} =\< 7+nv
vW=-RTRH
} Qp:I[:Lr;
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SortUtil： i]r(VKX
)$:1e)d
package org.rut.util.algorithm; eLSzGbKf
Ma|4nLC}
import org.rut.util.algorithm.support.BubbleSort; t,7%| {
import org.rut.util.algorithm.support.HeapSort; ww^\_KGu7
import org.rut.util.algorithm.support.ImprovedMergeSort; hN2A%ds*(j
import org.rut.util.algorithm.support.ImprovedQuickSort; A4tk</A
import org.rut.util.algorithm.support.InsertSort; %XGm\p
import org.rut.util.algorithm.support.MergeSort; 5)RZJrN]
import org.rut.util.algorithm.support.QuickSort; !d N[9}
import org.rut.util.algorithm.support.SelectionSort; mLuNl^)3
import org.rut.util.algorithm.support.ShellSort; =sYILe[
"#iJ/vy
/** _p*9LsN$L
* @author treeroot I1fpX |
* @since 2006-2-2 j+_fHADq
* @version 1.0 BX?DI-o^h
*/ S?0o[7(x*
public class SortUtil { 45c?0tj
public final static int INSERT = 1; Y6v{eWtSn
public final static int BUBBLE = 2; 3^UdB9j;
public final static int SELECTION = 3; "r&,#$6W6
public final static int SHELL = 4; P$obID
public final static int QUICK = 5; `DY yK?R
public final static int IMPROVED_QUICK = 6; ,s~l; Gkj
public final static int MERGE = 7; 5?-HQoT)G
public final static int IMPROVED_MERGE = 8; bgorW"'
public final static int HEAP = 9; wD9K\%jIr!
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public static void sort(int[] data) { M1kA-Xr
sort(data, IMPROVED_QUICK); {]Zan'{PCO
} j?2~6W/[
private static String[] name={ ({!!b"B2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ""-wM~^D
}; }YDi/b7
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private static Sort[] impl=new Sort[]{ 3IMvtg
new InsertSort(), [ \_o_W
new BubbleSort(), :.x(( FU
new SelectionSort(), ^o3,YH
new ShellSort(), eq6O6-
new QuickSort(), DC8#b`j
new ImprovedQuickSort(), ~*iF`T6
new MergeSort(), e#Cv*i_<
new ImprovedMergeSort(), zgAU5cw
new HeapSort() (GmBv
}; }:#WjH^
z)3TB&;
public static String toString(int algorithm){ <VxA&bb7c
return name[algorithm-1]; P-\f-FS
} -+WAaJ(b
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public static void sort(int[] data, int algorithm) { cZh0\DyU
impl[algorithm-1].sort(data); .C^P6S2oJ
} ;@ePu
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public static interface Sort { aN0[6+KP;
public void sort(int[] data); $f =`fPo
} zq};{~u(
rwq
public static void swap(int[] data, int i, int j) { eS8(HI6{^
int temp = data; 59Pc:Gg;
data = data[j]; c<$<n
data[j] = temp; *igmi9A
} T3{O+aRt
} TWRP|i!i